java

Java/Java源代码/codedemo/java/lang/instrument/FirstInstrumentation.java

@@ -0,0 +1,25 @@
+package cn.aofeng.demo.java.lang.instrument;
+
+import java.lang.instrument.Instrumentation;
+
+import org.apache.commons.lang.StringUtils;
+
+import cn.aofeng.demo.util.LogUtil;
+
+/**
+ * Instrument入口类。
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public class FirstInstrumentation {
+
+    public static void premain(String options, Instrumentation ins) {
+        if (StringUtils.isBlank(options)) {
+            LogUtil.log("instrument without options");
+        } else {
+            LogUtil.log("instrument with options:%s", options);
+        }
+        
+        ins.addTransformer(new FirstTransformer());
+    }
+}

Java/Java源代码/codedemo/java/lang/instrument/FirstTransformer.java

@@ -0,0 +1,26 @@
+/**
+ * 
+ */
+package cn.aofeng.demo.java.lang.instrument;
+
+import java.lang.instrument.ClassFileTransformer;
+import java.lang.instrument.IllegalClassFormatException;
+import java.security.ProtectionDomain;
+
+import cn.aofeng.demo.util.LogUtil;
+
+/**
+ * 只输出问候语，不进行字节码修改的Class转换器。
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public class FirstTransformer implements ClassFileTransformer {
+
+    @Override
+    public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined, 
+            ProtectionDomain protectionDomain, byte[] classfileBuffer) throws IllegalClassFormatException {
+        LogUtil.log(">>> %s", className);
+        return null;
+    }
+
+}

Java/Java源代码/codedemo/java/lang/instrument/Hello.java

@@ -0,0 +1,14 @@
+package cn.aofeng.demo.java.lang.instrument;
+
+/**
+ * Instrumentation启动类。 * 
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public class Hello {
+
+    public static void main(String[] args) {
+        // nothing
+    }
+
+}

Java/Java源代码/codedemo/java/lang/instrument/README.md

@@ -0,0 +1,40 @@
+# 一、Instrumentation入门
+
+* [FirstTransformer.java](FirstTransformer.java) 处理字节码，由类FirstInstrumentation执行
+* [FirstInstrumentation.java](FirstInstrumentation.java) instrumentation入口类，由javaagent载入执行
+* [build.xml](build.xml) Ant脚本，负责编译、打包和运行
+
+在当前目录下执行命令：
+```bash
+ant
+```
+
+输出信息如下：
+>     [java] instrument with options:"Hello, Instrumentation"
+>     [java] >>> java/lang/invoke/MethodHandleImpl
+>     [java] >>> java/lang/invoke/MethodHandleImpl$1
+>     [java] >>> java/lang/invoke/MethodHandleImpl$2
+>     [java] >>> java/util/function/Function
+>     [java] >>> java/lang/invoke/MethodHandleImpl$3
+>     [java] >>> java/lang/invoke/MethodHandleImpl$4
+>     [java] >>> java/lang/ClassValue
+>     [java] >>> java/lang/ClassValue$Entry
+>     [java] >>> java/lang/ClassValue$Identity
+>     [java] >>> java/lang/ClassValue$Version
+>     [java] >>> java/lang/invoke/MemberName$Factory
+>     [java] >>> java/lang/invoke/MethodHandleStatics
+>     [java] >>> java/lang/invoke/MethodHandleStatics$1
+>     [java] >>> sun/misc/PostVMInitHook
+>     [java] >>> sun/usagetracker/UsageTrackerClient
+>     [java] >>> java/util/concurrent/atomic/AtomicBoolean
+>     [java] >>> sun/usagetracker/UsageTrackerClient$1
+>     [java] >>> sun/usagetracker/UsageTrackerClient$4
+>     [java] >>> sun/usagetracker/UsageTrackerClient$3
+>     [java] >>> java/io/FileOutputStream$1
+>     [java] >>> sun/launcher/LauncherHelper
+>     [java] >>> cn/aofeng/demo/java/lang/instrument/Hello
+>     [java] >>> sun/launcher/LauncherHelper$FXHelper
+>     [java] >>> java/lang/Class$MethodArray
+>     [java] >>> java/lang/Void
+>     [java] >>> java/lang/Shutdown
+>     [java] >>> java/lang/Shutdown$Lock

Java/Java源代码/codedemo/java/lang/instrument/build.xml

@@ -0,0 +1,57 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project name="Instrumentation" default="run" basedir="../../../../../../../">
+
+	<property name="project.src.dir" value="${basedir}/src" />
+	<property name="project.lib.dir" value="${basedir}/lib" />
+	<property name="project.conf.dir" value="${basedir}/conf" />
+	<property name="project.target.dir" value="${basedir}/classes" />
+	<property name="project.dist.dir" value="${basedir}/dist" />
+
+	<path id="project.classpath">
+		<fileset dir="${project.lib.dir}">
+			<include name="*.jar" />
+		</fileset>
+	</path>
+
+	<target name="prepare">
+		<delete dir="${project.target.dir}" />
+		<mkdir dir="${project.target.dir}"/>
+		<copy todir="${project.target.dir}">
+			<fileset dir="${project.conf.dir}">
+				<include name="**/*.properties" />
+				<include name="**/*.xml" />
+			</fileset>
+		</copy>
+		
+		<delete dir="${project.dist.dir}" />
+		<mkdir dir="${project.dist.dir}" />
+	</target>
+
+	<target name="compileWithJavac" depends="prepare">
+		<echo message="compile with javac" />
+		<javac destdir="${project.target.dir}" srcdir="${project.src.dir}" source="1.8" target="1.8" 
+			encoding="UTF-8" debug="true" includeantruntime="false">
+			<classpath refid="project.classpath" />
+		</javac>
+	</target>
+
+	<target name="package" depends="compileWithJavac">
+	    <jar destfile="${project.dist.dir}/hello.jar">
+	        <fileset dir="${project.target.dir}">
+	            <include name="cn/aofeng/demo/java/lang/instrument/*.class" />
+	        </fileset>
+	    	<manifest>
+	    	    <attribute name="Premain-Class" value="cn.aofeng.demo.java.lang.instrument.FirstInstrumentation" />
+	    	</manifest>
+	    </jar>
+	</target>
+
+	<target name="run" depends="package">
+	    <java classname="cn.aofeng.demo.java.lang.instrument.Hello" fork="true">
+	        <classpath refid="project.classpath" />
+	        <classpath location="${project.target.dir}" />
+	    	<jvmarg value="-javaagent:${project.dist.dir}/hello.jar=&quot;Hello, Instrumentation&quot;" />
+	    </java>
+	</target>
+
+</project>

Java/Java源代码/codedemo/java/lang/reflect/ClassAnalyze.java

@@ -0,0 +1,143 @@
+package cn.aofeng.demo.java.lang.reflect;
+
+import java.lang.annotation.Annotation;
+import java.lang.reflect.AnnotatedElement;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Field;
+import java.lang.reflect.Member;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+
+/**
+ * 通过反射获取类的构造方法、字段、方法和注解等信息。
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public class ClassAnalyze {
+
+    final static String PREFIX = "==========";
+    final static String SUFFIX = PREFIX;
+    
+    private static void parseClass(Class<?> claz) {
+        // 注解
+        parseAnnotation(claz);
+        
+        // 类
+        StringBuilder buffer = new StringBuilder(32)
+            .append( Modifier.toString(claz.getModifiers()) )
+            .append(' ')
+            .append(claz.getName());
+        log(buffer.toString());
+    }
+    
+    private static void parseConstructor(Constructor<?> c) {
+        // 注解
+        parseAnnotation(c);
+        
+        // 构造方法
+        StringBuilder buffer = new StringBuilder(32)
+            .append( parseMember(c) )
+            .append('(');
+        
+        // 参数
+        Class<?>[] params = c.getParameterTypes();
+        for (int index = 0; index < params.length; index++) {
+            buffer.append(params[index].getName());
+            if (index!=params.length-1) {
+                buffer.append(", ");
+            }
+        }
+        buffer.append(')');
+        
+        log(buffer.toString());
+    }
+    
+    private static void parseMethod(Method method) {
+        // 注解
+        parseAnnotation(method);
+        
+        // 方法
+        StringBuilder buffer = new StringBuilder(32)
+            .append( parseMember(method) )
+            .append('(');
+        
+        // 参数
+        Class<?>[] params = method.getParameterTypes();
+        for (int index = 0; index < params.length; index++) {
+            buffer.append(params[index].getName());
+            if (index!=params.length-1) {
+                buffer.append(", ");
+            }
+        }
+        buffer.append(')');
+        
+        log(buffer.toString());
+    }
+    
+    private static void parseField(Field field) {
+        // 注解
+        parseAnnotation(field);
+        
+        // 字段
+        StringBuilder buffer = parseMember(field);
+        log(buffer.toString());
+    }
+    
+    /**
+     * 解析方法、字段或构造方法的信息。
+     * @param member 方法、字段或构造方法
+     * @return 修饰符和名称组成的字符串。
+     */
+    private static StringBuilder parseMember(Member member) {
+        StringBuilder buffer = new StringBuilder()
+            .append(Modifier.toString(member.getModifiers()))
+            .append(' ')
+            .append(member.getName());
+        return buffer;
+    }
+    
+    /**
+     * 解析注解信息。
+     */
+    private static void parseAnnotation(AnnotatedElement ae) {
+        Annotation[] ans = ae.getDeclaredAnnotations();
+        for (Annotation annotation : ans) {
+            log(annotation.toString());
+        }
+    }
+    
+    public static void log(String msg, Object... param) {
+        System.out.println( String.format(msg, param) );
+    }
+    
+    public static void main(String[] args) throws ClassNotFoundException {
+        if (args.length != 1) {
+            log("无效的输入参数！");
+            log("示例：");
+            log("java cn.aofeng.demo.java.lang.reflect.ClassAnalyze java.util.HashMap");
+        }
+        Class<?> claz = Class.forName(args[0]);
+        
+        log("%s类%s", PREFIX, SUFFIX);
+        parseClass(claz);
+        
+        log("%s构造方法%s", PREFIX, SUFFIX);
+        Constructor<?>[] cs = claz.getDeclaredConstructors();
+        for (Constructor<?> constructor : cs) {
+            parseConstructor(constructor);
+        }
+        
+        log("%s字段%s", PREFIX, SUFFIX);
+        Field[] fields = claz.getDeclaredFields();
+        for (Field field : fields) {
+            parseField(field);
+        }
+        
+        log("%s方法%s", PREFIX, SUFFIX);
+        Method[] methods = claz.getDeclaredMethods();
+        for (Method method : methods) {
+            parseMethod(method);
+        }
+    }
+
+}

Java/Java源代码/codedemo/java/lang/reflect/CreateInstance.java

@@ -0,0 +1,36 @@
+package cn.aofeng.demo.java.lang.reflect;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+
+import cn.aofeng.demo.util.LogUtil;
+
+/**
+ * 通过反射使用构造方法创建对象实例。
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public class CreateInstance {
+
+    public static void main(String[] args) throws InstantiationException, IllegalAccessException, 
+            NoSuchMethodException, SecurityException,
+            IllegalArgumentException, InvocationTargetException {
+        Class<Man> claz = Man.class;
+        
+        // 调用默认的public构造方法
+        Man man = claz.newInstance();
+        LogUtil.log(man.toString());
+        
+        // 调用带参数的protected构造方法
+        Constructor<Man> manC = claz.getDeclaredConstructor(String.class);
+        man = manC.newInstance("aofeng");
+        LogUtil.log(man.toString());
+        
+        // 调用带参数的private构造方法
+        manC = claz.getDeclaredConstructor(String.class, int.class);
+        manC.setAccessible(true);
+        man = manC.newInstance("NieYong", 32);
+        LogUtil.log(man.toString());
+    }
+
+}

Java/Java源代码/codedemo/java/lang/reflect/InvokeField.java

@@ -0,0 +1,37 @@
+package cn.aofeng.demo.java.lang.reflect;
+
+import java.lang.reflect.Field;
+
+import static cn.aofeng.demo.util.LogUtil.log;
+
+/**
+ * 通过反射设置字段。
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public class InvokeField {
+
+    public static void main(String[] args) throws NoSuchFieldException,
+            SecurityException, IllegalArgumentException, IllegalAccessException {
+        Man man = new Man();
+        Class<?> claz = man.getClass();
+        
+        log("==========设置public字段的值==========");
+        log("height的值:%d", man.height);
+        Field field = claz.getField("height");
+        field.setInt(man, 175);
+        log("height的值:%d", man.height);
+        
+        log("==========设置private字段的值==========");
+        log("power的值:%d", man.getPower());
+        field = claz.getDeclaredField("power");
+        field.setAccessible(true);
+        field.setInt(man, 100);
+        log("power的值:%d", man.getPower());
+        
+        log("==========获取private字段的值==========");
+        int power = field.getInt(man);
+        log("power的值:%d", power);
+    }
+
+}

Java/Java源代码/codedemo/java/lang/reflect/InvokeMethod.java

@@ -0,0 +1,84 @@
+package cn.aofeng.demo.java.lang.reflect;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+import static cn.aofeng.demo.util.LogUtil.log;
+
+/**
+ * 通过反射调用方法。
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public class InvokeMethod {
+
+    /**
+     * 调用父类的方法。
+     * 
+     * @param claz
+     *            类
+     * @param man
+     *            类对应的实例
+     */
+    private static void invokeParentMethod(Class<Man> claz, Man man)
+            throws NoSuchMethodException, IllegalAccessException,
+            InvocationTargetException {
+        // 调用父类的public方法
+        Method method = claz.getMethod("setName", String.class);
+        method.invoke(man, "NieYong");
+        log(man.toString());
+
+        method = claz.getMethod("getName");
+        Object result = method.invoke(man);
+        log("name:%s", result);
+
+        // 调用父类的private方法
+        method = claz.getSuperclass().getDeclaredMethod("reset");
+        method.setAccessible(true);
+        result = method.invoke(man);
+        log(man.toString());
+    }
+
+    /**
+     * 调用自身的方法。
+     * 
+     * @param claz
+     *            类
+     * @param man
+     *            类对应的实例
+     */
+    private static void invokeSelfMethod(Class<Man> claz, Man man)
+            throws NoSuchMethodException, IllegalAccessException,
+            InvocationTargetException {
+        man.setName("XiaoMing");
+        // 调用自身的private方法
+        Method method = claz.getDeclaredMethod("setPower", int.class);
+        method.setAccessible(true);
+        method.invoke(man, 99);
+        log("power:%d", man.getPower());
+
+        // 调用自身的public方法
+        log("%s is marry:%s", man.getName(), (man.isMarry() ? "Yes" : "No"));
+        method = claz.getDeclaredMethod("setMarry", boolean.class);
+        method.invoke(man, true);
+        log("%s is marry:%s", man.getName(), (man.isMarry() ? "Yes" : "No"));
+
+        // 调用静态方法，可将实例设置为null，因为静态方法属于类
+        Man a = new Man("张三");
+        Man b = new Man("李四");
+        method = claz.getMethod("fight", Man.class, Man.class);
+        method.invoke(null, a, b); //
+    }
+
+    public static void main(String[] args) throws NoSuchMethodException,
+            SecurityException, IllegalAccessException,
+            IllegalArgumentException, InvocationTargetException,
+            InstantiationException {
+        Class<Man> claz = Man.class;
+        Man man = claz.newInstance();
+
+        invokeParentMethod(claz, man);
+        invokeSelfMethod(claz, man);
+    }
+
+}

Java/Java源代码/codedemo/java/lang/reflect/Man.java

@@ -0,0 +1,63 @@
+package cn.aofeng.demo.java.lang.reflect;
+
+import cn.aofeng.demo.json.gson.Person;
+import cn.aofeng.demo.util.LogUtil;
+
+/**
+ * 男人。
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public class Man extends Person {
+
+    private boolean marry;
+    
+    private int power;
+    
+    public int height;
+
+    public Man() {
+        super();
+        LogUtil.log("%s的默认构造方法被调用", Man.class.getName());
+    }
+    
+    protected Man(String name) {
+        super(name, 0);
+        LogUtil.log("%s带name参数的构造方法被调用", Man.class.getName());
+    }
+    
+    @SuppressWarnings("unused")
+    private Man(String name, int age) {
+        super(name, age);
+        LogUtil.log("%s带name和age参数的构造方法被调用", Man.class.getName());
+    }
+    
+    public static void fight(Man a, Man b) {
+        String win = "unkown";
+        if (a.power > b.power) {
+            win = a.getName();
+        } else if (b.power > a.power) {
+            win = a.getName();
+        }
+        
+        LogUtil.log("%s vs %s, fight result:%s", a.getName(), b.getName(), win);
+    }
+    
+    public boolean isMarry() {
+        return marry;
+    }
+
+    public void setMarry(boolean marry) {
+        this.marry = marry;
+    }
+
+    public int getPower() {
+        return power;
+    }
+
+    @SuppressWarnings("unused")
+    private void setPower(int power) {
+        this.power = power;
+    }
+
+}

Java/Java源代码/codedemo/java/lang/serialization/Man.java

@@ -0,0 +1,74 @@
+package cn.aofeng.demo.java.lang.serialization;
+
+import java.io.Externalizable;
+import java.io.IOException;
+import java.io.ObjectInput;
+import java.io.ObjectOutput;
+
+/**
+ * 自定义序列化和反序列化。
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public class Man implements Externalizable {
+
+    private String manName;
+    
+    private int manAge;
+    
+    private transient String password;
+
+    public Man() {
+        // nothing
+    }
+    
+    public Man(String name, int age) {
+        this.manName = name;
+        this.manAge = age;
+    }
+    
+    public Man(String name, int age, String password) {
+        this.manName = name;
+        this.manAge = age;
+        this.password = password;
+    }
+    
+    public String getManName() {
+        return manName;
+    }
+
+    public void setManName(String manName) {
+        this.manName = manName;
+    }
+
+    public int getManAge() {
+        return manAge;
+    }
+
+    public void setManAge(int manAge) {
+        this.manAge = manAge;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+
+    @Override
+    public void writeExternal(ObjectOutput out) throws IOException {
+        out.writeObject(manName);
+        out.writeInt(manAge);
+        out.writeObject(password);
+    }
+
+    @Override
+    public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
+        manName = (String) in.readObject();
+        manAge = in.readInt();
+        password = (String) in.readObject();
+    }
+
+}

Java/Java源代码/codedemo/java/lang/serialization/People.java

@@ -0,0 +1,79 @@
+package cn.aofeng.demo.java.lang.serialization;
+
+import java.io.Serializable;
+
+/**
+ * 默认序列化和
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public class People implements Serializable {
+
+    private static final long serialVersionUID = 6235620243018494633L;
+
+    private String name;
+    
+    private int age;
+    
+    private transient String address;
+    
+    private static String sTestNormal;
+    
+    private static transient String sTestTransient;
+
+    public People(String name) {
+        this.name = name;
+    }
+    
+    public People(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
+    
+    public People(String name, int age, String address) {
+        this.name = name;
+        this.age = age;
+        this.address = address;
+    }
+    
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    public void setAge(int age) {
+        this.age = age;
+    }
+
+    public String getAddress() {
+        return address;
+    }
+
+    public void setAddress(String address) {
+        this.address = address;
+    }
+
+    public String getsTestNormal() {
+        return sTestNormal;
+    }
+
+    public void setsTestNormal(String sTestNormal) {
+        People.sTestNormal = sTestNormal;
+    }
+
+    public String getsTestTransient() {
+        return sTestTransient;
+    }
+
+    public void setsTestTransient(String sTestTransient) {
+        People.sTestTransient = sTestTransient;
+    }
+
+}

Java/Java源代码/codedemo/java/lang/serialization/TransientDemo.java

@@ -0,0 +1,126 @@
+package cn.aofeng.demo.java.lang.serialization;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+
+import org.apache.commons.io.IOUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * 关键字 transient 测试。
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public class TransientDemo {
+
+    private static Logger _logger = LoggerFactory.getLogger(TransientDemo.class);
+    
+    private String _tempFileName = "TransientDemo";
+    
+    /**
+     * 将对象序列化并保存到文件。
+     * 
+     * @param obj 待序列化的对象
+     */
+    public void save(Object obj) {
+        ObjectOutputStream outs = null;
+        try {
+            outs = new ObjectOutputStream(
+                    new FileOutputStream( getTempFile(_tempFileName) ));
+            outs.writeObject(obj);
+        } catch (IOException e) {
+            _logger.error("save object to file occurs error", e);
+        } finally {
+            IOUtils.closeQuietly(outs);
+        }
+    }
+    
+    /**
+     * 从文件读取内容并反序列化成对象。
+     * 
+     * @return {@link People}对象。如果读取文件出错 或 对象类型转换失败，返回null。
+     */
+    public <T> T load() {
+        ObjectInputStream ins = null;
+        try {
+            ins = new ObjectInputStream(
+                    new FileInputStream( getTempFile(_tempFileName)) );
+            return ((T) ins.readObject());
+        } catch (IOException e) {
+            _logger.error("load object from file occurs error", e);
+        } catch (ClassNotFoundException e) {
+            _logger.error("load object from file occurs error", e);
+        } finally {
+            IOUtils.closeQuietly(ins);
+        }
+        
+        return null;
+    }
+    
+    private File getTempFile(String filename) {
+        return new File(getTempDir(), filename);
+    }
+    
+    private String getTempDir() {
+        return System.getProperty("java.io.tmpdir");
+    }
+    
+    private void displayPeople(People people) {
+        if (null == people) {
+            return;
+        }
+        String template = "People[name:%s, age:%d, address:%s, sTestNormal:%s, sTestTransient:%s]";
+        System.out.println( String.format(template, people.getName(), people.getAge(), 
+                people.getAddress(), people.getsTestNormal(), people.getsTestTransient()));
+    }
+    
+    private void displayMan(Man man) {
+        if (null == man) {
+            return;
+        }
+        String template = "Man[manName:%s, manAge:%d, password:%s]";
+        System.out.println( String.format(template, man.getManName(), man.getManAge(), man.getPassword()) );
+    }
+    
+    /**
+     * @param args
+     */
+    public static void main(String[] args) {
+        System.out.println(">>> Serializable测试");
+        TransientDemo demo = new TransientDemo();
+        
+        People people = new People("张三", 30, "中国广州");
+        people.setsTestNormal("normal-first");
+        people.setsTestTransient("transient-first");
+        System.out.println("序列化之前的对象信息：");
+        demo.displayPeople(people);
+        demo.save(people);
+        
+        // 修改静态变量的值
+        people.setsTestNormal("normal-second");
+        people.setsTestTransient("transient-second");
+        
+        People fromLoad = demo.load();
+        System.out.println("反序列化之后的对象信息：");
+        demo.displayPeople(fromLoad);
+        
+        
+        
+        System.out.println("");
+        System.out.println(">>> Externalizable测试");
+        Man man = new Man("李四", 10, "假密码");
+        System.out.println("序列化之前的对象信息：");
+        demo.displayMan(man);
+        demo.save(man);
+        
+        Man manFromLoadMan = demo.load();
+        System.out.println("反序列化之后的对象信息：");
+        demo.displayMan(manFromLoadMan);
+    }
+
+}

Java/Java源代码/codedemo/java/rmi/Gender.java

@@ -0,0 +1,20 @@
+package cn.aofeng.demo.java.rmi;
+
+/**
+ * 性别。
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public class Gender {
+
+    /**
+     * 男。
+     */
+    public final static char MALE = 'M';
+    
+    /**
+     * 女。
+     */
+    public final static char FEMALE = 'F';
+
+}

Java/Java源代码/codedemo/java/rmi/RmiClient.java

@@ -0,0 +1,60 @@
+package cn.aofeng.demo.java.rmi;
+
+import java.net.MalformedURLException;
+import java.rmi.Naming;
+import java.rmi.NotBoundException;
+import java.rmi.RemoteException;
+
+import org.apache.commons.lang.StringUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * 
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public class RmiClient {
+
+    private static Logger _logger = LoggerFactory.getLogger(RmiClient.class);
+    
+    private static String assembleUrl(String hostUrl, String bindName) {
+        if (StringUtils.isBlank(hostUrl) || StringUtils.isBlank(bindName)) {
+            return null;
+        }
+        
+        String host = hostUrl.endsWith("/") ? hostUrl.substring(0, hostUrl.length()-1) : hostUrl;
+        String name = bindName.startsWith("/") ? bindName.substring(1) : bindName;
+        
+        return host + "/" + name;
+    }
+    
+    /**
+     * @param args 
+     * <ul>
+     *   <li>[0]：待连接的RMI主机。如：rmi://192.168.56.102:9999</li>
+     *   <li>[1]：服务名称。如：UserService</li>
+     * </ul>
+     */
+    public static void main(String[] args) throws MalformedURLException, RemoteException, NotBoundException {
+        String host = args[0];
+        String serviceName = args[1];
+        String url = assembleUrl(host, serviceName);
+        UserService userService = (UserService) Naming.lookup(url);
+        
+        String userId = "10000";
+        User user = userService.findById(userId);
+        _logger.info("身份证号为{}的用户信息{}", userId, user);
+        userId = "10001";
+        user = userService.findById(userId);
+        _logger.info("身份证号为{}的用户信息{}", userId, user);
+        
+        String userName = "小明";
+        user = userService.findByName(userName);
+        _logger.info("姓名为{}的用户信息{}", userName, user);
+        userName = "张三";
+        user = userService.findByName(userName);
+        _logger.info("姓名为{}的用户信息{}", userName, user);
+    }
+
+}

Java/Java源代码/codedemo/java/rmi/RmiServer.java

@@ -0,0 +1,53 @@
+package cn.aofeng.demo.java.rmi;
+
+import java.rmi.AlreadyBoundException;
+import java.rmi.RemoteException;
+import java.rmi.registry.LocateRegistry;
+import java.rmi.registry.Registry;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * RMI服务端。
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public class RmiServer {
+
+    private static Logger _logger = LoggerFactory.getLogger(RmiServer.class);
+    
+    public static Registry createRegistry(int port) {
+        Registry registry = null;
+        try {
+            registry = LocateRegistry.createRegistry(port);
+        } catch (RemoteException e) {
+            _logger.info( String.format("注册端口%s失败", port), e);
+        }
+        
+        return registry;
+    }
+    
+    /**
+     * @param args [0]:绑定端口
+     * @throws RemoteException 
+     */
+    public static void main(String[] args) throws RemoteException {
+        int port = Integer.parseInt(args[0]);
+        UserService userService = new UserServiceImpl();
+        Registry registry = createRegistry(port);
+        if (null == registry) {
+            System.exit(0);
+        }
+        
+        String bindName = "UserService";
+        try {
+            registry.bind(bindName, userService);
+        } catch (AlreadyBoundException e) {
+            _logger.info("服务{}已经绑定过", bindName);
+        }
+        
+        _logger.info("RMI Server started, listen port:{}", port);
+    }
+
+}

Java/Java源代码/codedemo/java/rmi/User.java

@@ -0,0 +1,170 @@
+package cn.aofeng.demo.java.rmi;
+
+import java.io.Serializable;
+
+/**
+ * 用户信息。
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public class User implements Serializable {
+
+    private static final long serialVersionUID = 7616705579045104892L;
+
+    /**
+     * 身份证号。
+     */
+    private String id;
+    
+    /**
+     * 姓名。
+     */
+    private String name;
+    
+    /**
+     * 性别：M-男；F-女。
+     */
+    private char gender;
+
+    /**
+     * 出生日期。以毫秒存储。
+     */
+    private long birthday;
+    
+    /**
+     * 国家。
+     */
+    private String country;
+    
+    /**
+     * 省／州。
+     */
+    private String province;
+    
+    /**
+     * 市／区。
+     */
+    private String city;
+    
+    /**
+     * 街道详细地址。
+     */
+    private String address;
+
+    public String getId() {
+        return id;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public char getGender() {
+        return gender;
+    }
+
+    public void setGender(char gender) {
+        this.gender = gender;
+    }
+
+    public long getBirthday() {
+        return birthday;
+    }
+
+    public void setBirthday(long birthday) {
+        this.birthday = birthday;
+    }
+
+    public String getCountry() {
+        return country;
+    }
+
+    public void setCountry(String country) {
+        this.country = country;
+    }
+
+    public String getProvince() {
+        return province;
+    }
+
+    public void setProvince(String province) {
+        this.province = province;
+    }
+
+    public String getCity() {
+        return city;
+    }
+
+    public void setCity(String city) {
+        this.city = city;
+    }
+
+    public String getAddress() {
+        return address;
+    }
+
+    public void setAddress(String address) {
+        this.address = address;
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((country == null) ? 0 : country.hashCode());
+        result = prime * result + ((id == null) ? 0 : id.hashCode());
+        result = prime * result + ((name == null) ? 0 : name.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        User other = (User) obj;
+        if (country == null) {
+            if (other.country != null)
+                return false;
+        } else if (!country.equals(other.country))
+            return false;
+        if (id == null) {
+            if (other.id != null)
+                return false;
+        } else if (!id.equals(other.id))
+            return false;
+        if (name == null) {
+            if (other.name != null)
+                return false;
+        } else if (!name.equals(other.name))
+            return false;
+        return true;
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder buffer = new StringBuilder(256)
+            .append("User [id=").append(id)
+            .append(", name=").append(name)
+            .append(", gender=").append(gender)
+            .append(", birthday=").append(birthday)
+            .append(", country=").append(country)
+            .append(", province=").append(province)
+            .append(", city=").append(city)
+            .append(", address=").append(address)
+            .append("]");
+        return buffer.toString();
+    }
+
+}

Java/Java源代码/codedemo/java/rmi/UserService.java

@@ -0,0 +1,19 @@
+package cn.aofeng.demo.java.rmi;
+
+import java.rmi.Remote;
+import java.rmi.RemoteException;
+
+/**
+ * 用户信息服务。
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public interface UserService extends Remote {
+
+    public User findByName(String name) throws RemoteException;
+    
+    public User findById(String id) throws RemoteException;
+    
+    public boolean add(User user) throws RemoteException;
+
+}

Java/Java源代码/codedemo/java/rmi/UserServiceImpl.java

@@ -0,0 +1,70 @@
+package cn.aofeng.demo.java.rmi;
+
+import java.rmi.RemoteException;
+import java.rmi.server.UnicastRemoteObject;
+
+import org.apache.commons.lang.StringUtils;
+
+/**
+ * 用户信息服务。
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public class UserServiceImpl extends UnicastRemoteObject implements UserService {
+
+    public UserServiceImpl() throws RemoteException {
+        super();
+    }
+
+    private static final long serialVersionUID = -9134952963637302483L;
+
+    @Override
+    public User findByName(String name) throws RemoteException {
+        if (StringUtils.isBlank(name)) {
+            return null;
+        }
+        
+        if ("小明".equals(name)) {
+            return createUser("10000", "小明", Gender.MALE);
+        }
+        
+        return null;
+    }
+
+    @Override
+    public User findById(String id) throws RemoteException {
+        if (StringUtils.isBlank(id)) {
+            return null;
+        }
+        
+        if ("10000".equals(id)) {
+            return createUser("10000", "小丽", Gender.FEMALE);
+        }
+        
+        return null;
+    }
+
+    @Override
+    public boolean add(User user) throws RemoteException {
+        if (null == user || StringUtils.isBlank(user.getId()) || StringUtils.isBlank(user.getName())) {
+            return false;
+        }
+        
+        return true;
+    }
+
+    private User createUser(String id, String name, char gender) {
+        User user = new User();
+        user.setId(id);
+        user.setName(name);
+        user.setGender(gender);
+        user.setBirthday(System.currentTimeMillis());
+        user.setCountry("中国");
+        user.setProvince("广东");
+        user.setCity("广州");
+        user.setAddress("xxx区xxx街道xxx号");
+        
+        return user;
+    }
+
+}

Java/Java源代码/codedemo/java/util/concurret/ScheduledExecutorServiceDemo.java

@@ -0,0 +1,78 @@
+package cn.aofeng.demo.java.util.concurret;
+
+import java.util.Date;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
+
+import cn.aofeng.demo.util.DateUtil;
+
+/**
+ * {@link ScheduledExecutorService}的使用示例：<br>
+ * 定时任务1：执行过程中会抛出异常。<br>
+ * 定时任务2：执行过程中不会抛出异常。<br>
+ * <br>
+ * 目的：检测java.util.concurrent.ScheduledExecutorService在执行定时任务的过程中，任务内抛出异常没有捕捉时在下一次执行时间到来时，是否可以正常执行。<br>
+ * 测试的JDK版本：1.6.xx。<br>
+ * 结果：通过，相比java.util.Timer，完善地解决了定时任务抛异常的问题。
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public class ScheduledExecutorServiceDemo {
+
+    public static void main(String[] args) {
+        ScheduledExecutorService timer = Executors.newScheduledThreadPool(2);
+        long delay = computeDelay();
+        timer.schedule(new ThrowExceptionTask(timer), delay, TimeUnit.MILLISECONDS);
+        timer.schedule(new NotThrowExceptionTask(timer), delay, TimeUnit.MILLISECONDS);
+        System.out.println("主线程的功能执行完毕");
+    }
+
+    private static long computeDelay() {
+        Date now = new Date();
+        Date nextMinute = DateUtil.getNextMinute();
+        long delay = nextMinute.getTime() - now.getTime();
+        return delay;
+    }
+
+    static class ThrowExceptionTask implements Runnable {
+
+        private ScheduledExecutorService _timer;
+        
+        public ThrowExceptionTask(ScheduledExecutorService timer) {
+            this._timer = timer;
+        }
+        
+        @Override
+        public void run() {
+            try {
+                System.out.println("任务名:ThrowExceptionTask, 当前时间:"+DateUtil.getCurrentTime());
+                
+                throw new IllegalArgumentException();
+            } finally {
+                _timer.schedule(new ThrowExceptionTask(_timer), computeDelay(), TimeUnit.MILLISECONDS);
+            }
+        }
+        
+    } // end of ThrowExceptionTask
+    
+    static class NotThrowExceptionTask implements Runnable {
+        
+        private ScheduledExecutorService _timer;
+        
+        public NotThrowExceptionTask(ScheduledExecutorService timer) {
+            this._timer = timer;
+        }
+        
+        @Override
+        public void run() {
+            try {
+                System.out.println("任务名:NotThrowExceptionTask, 当前时间:"+DateUtil.getCurrentTime());
+            } finally {
+                _timer.schedule(new NotThrowExceptionTask(_timer), computeDelay(), TimeUnit.MILLISECONDS);
+            }
+        }
+        
+    } // end of NotThrowExceptionTask
+
+}

Java/Java源代码/codedemo/java/util/forkjoin/HelloForkJoin.java

@@ -0,0 +1,103 @@
+package cn.aofeng.demo.java.util.forkjoin;
+
+import java.util.Arrays;
+import java.util.concurrent.ForkJoinPool;
+import java.util.concurrent.RecursiveTask;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Fork/Join练习。
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public class HelloForkJoin extends RecursiveTask<Long> {
+
+    private static final long serialVersionUID = -2386438994963147457L;
+
+    private int[] _intArray;
+    
+    private int _threshold = 10;
+    
+    private long _result = 0;
+    
+    public HelloForkJoin(int[] intArray) {
+        this._intArray = intArray;
+    }
+    
+    @Override
+    protected Long compute() {
+        if (null == _intArray || _intArray.length <= 0) {
+            return 0L;
+        }
+        
+        if (_intArray.length <= _threshold) {   // 如果数组长度小于等于指定的值，执行累加操作
+            for (int item : _intArray) {
+                _result += item;
+            }
+            System.out.println( String.format("线程：%s，累加数组%s中的值，结果：%d", Thread.currentThread(), Arrays.toString(_intArray), _result) );
+        } else {   // 如果数组长度大于指定的值，做任务分解
+            int[] temp = new int[_threshold];
+            System.arraycopy(_intArray, 0, temp, 0, _threshold);
+            HelloForkJoin subTask1 = new HelloForkJoin(temp);
+            subTask1.fork();
+            
+            if (_intArray.length - _threshold > 0) {
+                int remain[] = new int[_intArray.length - _threshold];
+                System.arraycopy(_intArray, _threshold, remain, 0, remain.length);
+                HelloForkJoin task = new HelloForkJoin(remain);
+                task.fork();
+                _result += task.join();
+            }
+            
+            _result += subTask1.join();
+            
+            return _result;
+        }
+        
+        return _result;
+    }
+    
+    public static void main(String[] args) throws InterruptedException {
+        int count = 10000;
+        
+        serialCompute(count);
+        parallelCompute(count);
+    }
+
+    /**
+     * 使用fork/join并行计算数字累加。
+     * 
+     * @param count 数字个数（从1开始）
+     * @throws InterruptedException
+     */
+    private static void parallelCompute(int count)
+            throws InterruptedException {
+        int[] numbers = new int[count];
+        for (int i = 0; i < count; i++) {
+            numbers[i] = i+1;
+        }
+        ForkJoinPool pool = new ForkJoinPool(4);
+        HelloForkJoin task = new HelloForkJoin(numbers);
+        long startTime = System.currentTimeMillis();
+        pool.submit(task);
+        pool.shutdown();
+        pool.awaitTermination(10, TimeUnit.SECONDS);
+        
+        System.out.println( String.format("并行计算结果：%d，耗时：%d毫秒", task._result, System.currentTimeMillis()-startTime) );
+    }
+
+    /**
+     * 使用for循环串行计算数字累加。
+     * 
+     * @param count 数字个数（从1开始） 
+     */
+    private static void serialCompute(int count) {
+        long startTime = System.currentTimeMillis();
+        int sum = 0;
+        for (int i = 0; i < count; i++) {
+            sum += (i+1);
+        }
+        System.out.println( String.format("串行计算结果：%d，耗时：%d毫秒", sum, System.currentTimeMillis()-startTime) );
+    }
+
+}

Java/Java源代码/codedemo/java/util/future/Future.ucls

@@ -0,0 +1,101 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<class-diagram version="1.1.6" icons="true" always-add-relationships="false" generalizations="true" realizations="true" 
+  associations="true" dependencies="false" nesting-relationships="true">  
+  <interface id="1" language="java" name="java.util.concurrent.Future" project="JavaDemo" 
+    file="/devdata/java/jdk/jdk1.7.0_60/jre/lib/rt.jar" binary="true" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="334" y="85"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" accessors="true" 
+      visibility="true">      
+      <attributes public="false" package="true" protected="false" private="false" static="false"/>      
+      <operations public="true" package="true" protected="false" private="false" static="false"/>    
+    </display>  
+  </interface>  
+  <class id="2" language="java" name="java.util.concurrent.FutureTask" project="JavaDemo" 
+    file="/devdata/java/jdk/jdk1.7.0_60/jre/lib/rt.jar" binary="true" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="521" y="477"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" accessors="true" 
+      visibility="true">      
+      <attributes public="false" package="true" protected="false" private="false" static="false"/>      
+      <operations public="true" package="true" protected="false" private="false" static="false"/>    
+    </display>  
+  </class>  
+  <interface id="3" language="java" name="java.util.concurrent.RunnableFuture" project="JavaDemo" 
+    file="/devdata/java/jdk/jdk1.7.0_60/jre/lib/rt.jar" binary="true" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="521" y="280"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" accessors="true" 
+      visibility="true">      
+      <attributes public="false" package="true" protected="false" private="false" static="false"/>      
+      <operations public="true" package="true" protected="false" private="false" static="false"/>    
+    </display>  
+  </interface>  
+  <interface id="4" language="java" name="java.util.concurrent.RunnableScheduledFuture" project="JavaDemo" 
+    file="/devdata/java/jdk/jdk1.7.0_60/jre/lib/rt.jar" binary="true" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="130" y="410"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" accessors="true" 
+      visibility="true">      
+      <attributes public="false" package="true" protected="false" private="false" static="false"/>      
+      <operations public="true" package="true" protected="false" private="false" static="false"/>    
+    </display>  
+  </interface>  
+  <interface id="5" language="java" name="java.util.concurrent.ScheduledFuture" project="JavaDemo" 
+    file="/devdata/java/jdk/jdk1.7.0_60/jre/lib/rt.jar" binary="true" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="131" y="272"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" accessors="true" 
+      visibility="true">      
+      <attributes public="false" package="true" protected="false" private="false" static="false"/>      
+      <operations public="true" package="true" protected="false" private="false" static="false"/>    
+    </display>  
+  </interface>  
+  <interface id="6" language="java" name="java.util.concurrent.Delayed" project="JavaDemo" 
+    file="/devdata/java/jdk/jdk1.7.0_60/jre/lib/rt.jar" binary="true" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="131" y="119"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" accessors="true" 
+      visibility="true">      
+      <attributes public="false" package="true" protected="false" private="false" static="false"/>      
+      <operations public="true" package="true" protected="false" private="false" static="false"/>    
+    </display>  
+  </interface>  
+  <interface id="7" language="java" name="java.lang.Runnable" project="JavaDemo" 
+    file="/devdata/java/jdk/jdk1.7.0_60/jre/lib/rt.jar" binary="true" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="521" y="119"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" accessors="true" 
+      visibility="true">      
+      <attributes public="false" package="true" protected="false" private="false" static="false"/>      
+      <operations public="true" package="true" protected="false" private="false" static="false"/>    
+    </display>  
+  </interface>  
+  <generalization id="8">    
+    <end type="SOURCE" refId="4"/>    
+    <end type="TARGET" refId="5"/>  
+  </generalization>  
+  <generalization id="9">    
+    <end type="SOURCE" refId="3"/>    
+    <end type="TARGET" refId="7"/>  
+  </generalization>  
+  <generalization id="10">    
+    <end type="SOURCE" refId="4"/>    
+    <end type="TARGET" refId="3"/>  
+  </generalization>  
+  <generalization id="11">    
+    <end type="SOURCE" refId="5"/>    
+    <end type="TARGET" refId="6"/>  
+  </generalization>  
+  <generalization id="12">    
+    <end type="SOURCE" refId="5"/>    
+    <end type="TARGET" refId="1"/>  
+  </generalization>  
+  <generalization id="13">    
+    <end type="SOURCE" refId="3"/>    
+    <end type="TARGET" refId="1"/>  
+  </generalization>  
+  <realization id="14">    
+    <end type="SOURCE" refId="2"/>    
+    <end type="TARGET" refId="3"/>  
+  </realization>  
+  <classifier-display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
+    accessors="true" visibility="true">    
+    <attributes public="false" package="true" protected="false" private="false" static="false"/>    
+    <operations public="true" package="true" protected="false" private="false" static="false"/>  
+  </classifier-display>  
+  <association-display labels="true" multiplicity="true"/>
+</class-diagram>

Java/Java源代码/codedemo/java/util/future/HelloFuture.java

@@ -0,0 +1,106 @@
+package cn.aofeng.demo.java.util.future;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.Callable;
+import java.util.concurrent.CancellationException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+import java.util.concurrent.TimeUnit;
+
+import org.apache.log4j.Logger;
+
+/**
+ * Future、Callable练习。
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public class HelloFuture {
+
+    private static Logger _logger = Logger.getLogger(HelloFuture.class);
+
+    /**
+     * @param args
+     * @throws InterruptedException 
+     */
+    public static void main(String[] args) throws InterruptedException {
+        executeSingleTask();
+        executeBatchTask();
+    }
+
+    /**
+     * 执行单个异步任务：<br>
+     * 1、用submit方法向线程池提交一个任务。<br>
+     * 2、获取结果时，指定了超时时间。<br><br>
+     * 结果：超时后，调用者收到TimeoutException，但实际上任务还在继续执行。
+     * @throws InterruptedException
+     */
+    private static void executeSingleTask() throws InterruptedException {
+        ExecutorService threadpool = Executors.newFixedThreadPool(6);
+        try {
+            Future<Integer> f = threadpool.submit(createCallable(5 * 1000));
+            Object result = f.get(3, TimeUnit.SECONDS);
+            System.out.println("单个任务的执行结果："+result);
+        } catch (Exception e) {
+            _logger.error("线程执行任务时出错", e);
+        } finally {
+            threadpool.shutdown();
+            threadpool.awaitTermination(10, TimeUnit.SECONDS);
+        }
+    }
+
+    /**
+     * 执行多个异步任务：<br>
+     * 1、用invokeAll方法向线程池提交多个任务，并指定了执行的超时时间。<br><br>
+     * 结果：超时后，未执行完成的任务被取消，在调用Future的get方法时，取消的任务会抛出CancellationException，执行完成的任务可获得结果。
+     * @throws InterruptedException
+     */
+    private static void executeBatchTask() throws InterruptedException {
+        ExecutorService threadpool = Executors.newFixedThreadPool(6);
+        List<Callable<Integer>> tasks = new ArrayList<Callable<Integer>>();
+        tasks.add(createCallable(2000));
+        tasks.add(createCallable(5000));
+        tasks.add(createCallable(2500));
+        
+        long startTime = System.currentTimeMillis();
+        try {
+            List<Future<Integer>> fs = threadpool.invokeAll(tasks, 3, TimeUnit.SECONDS);
+            int result = 0;
+            for (Future<Integer> f : fs) {
+                try{
+                    result += f.get();
+                } catch(CancellationException ce) {
+                    // nothing
+                }
+            }
+            System.out.println("执行三个任务共耗时：" + (System.currentTimeMillis() - startTime) + "毫秒");
+            System.out.println("三个任务的执行结果汇总："+result);
+        } catch (Exception e) {
+            _logger.error("线程执行任务时出错", e);
+        } finally {
+            threadpool.shutdown();
+            threadpool.awaitTermination(10, TimeUnit.SECONDS);
+        }
+    }
+    
+    /**
+     * 创建需要长时间执行的任务模拟对象。
+     * @param sleepTimes 线程休眠时间（单位：毫秒）
+     * @return {@link Callable}对象
+     */
+    private static Callable<Integer> createCallable(final int sleepTimes) {
+        Callable<Integer> c = new Callable<Integer>() {
+
+            @Override
+            public Integer call() throws Exception {
+                Thread.sleep(sleepTimes);
+                System.out.println(Thread.currentThread().getName() + ": I'm working");
+                return 9;
+            }
+        };
+        
+        return c;
+    }
+
+}

Java/Java源代码/codedemo/java/util/map/Map接口及其实现类.ucls

@@ -0,0 +1,139 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<class-diagram version="1.1.6" icons="true" always-add-relationships="false" generalizations="true" realizations="true" 
+  associations="true" dependencies="false" nesting-relationships="true">  
+  <interface id="1" language="java" name="java.util.Map" project="JavaDemo" 
+    file="/devdata/java/jdk/jdk1.6.0_45/jre/lib/rt.jar" binary="true" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="417" y="179"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" accessors="true" 
+      visibility="true">      
+      <attributes public="false" package="false" protected="false" private="false" static="true"/>      
+      <operations public="true" package="true" protected="false" private="false" static="true"/>    
+    </display>  
+  </interface>  
+  <class id="2" language="java" name="java.util.AbstractMap" project="JavaDemo" 
+    file="/devdata/java/jdk/jdk1.6.0_45/jre/lib/rt.jar" binary="true" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="417" y="423"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" accessors="true" 
+      visibility="true">      
+      <attributes public="false" package="false" protected="false" private="false" static="true"/>      
+      <operations public="false" package="false" protected="false" private="false" static="true"/>    
+    </display>  
+  </class>  
+  <class id="3" language="java" name="java.util.HashMap" project="JavaDemo" 
+    file="/devdata/java/jdk/jdk1.6.0_45/jre/lib/rt.jar" binary="true" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="824" y="422"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" accessors="true" 
+      visibility="true">      
+      <attributes public="false" package="false" protected="false" private="false" static="false"/>      
+      <operations public="false" package="false" protected="false" private="false" static="true"/>    
+    </display>  
+  </class>  
+  <class id="4" language="java" name="java.util.Hashtable" project="JavaDemo" 
+    file="/devdata/java/jdk/jdk1.6.0_45/jre/lib/rt.jar" binary="true" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="152" y="312"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" accessors="true" 
+      visibility="true">      
+      <attributes public="false" package="false" protected="false" private="false" static="true"/>      
+      <operations public="false" package="false" protected="false" private="false" static="true"/>    
+    </display>  
+  </class>  
+  <class id="5" language="java" name="java.util.IdentityHashMap" project="JavaDemo" 
+    file="/devdata/java/jdk/jdk1.6.0_45/jre/lib/rt.jar" binary="true" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="206" y="423"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" accessors="true" 
+      visibility="true">      
+      <attributes public="false" package="false" protected="false" private="false" static="true"/>      
+      <operations public="false" package="false" protected="false" private="false" static="true"/>    
+    </display>  
+  </class>  
+  <class id="6" language="java" name="java.util.LinkedHashMap" project="JavaDemo" 
+    file="/devdata/java/jdk/jdk1.6.0_45/jre/lib/rt.jar" binary="true" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="824" y="283"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" accessors="true" 
+      visibility="true">      
+      <attributes public="false" package="false" protected="false" private="false" static="true"/>      
+      <operations public="false" package="false" protected="false" private="false" static="true"/>    
+    </display>  
+  </class>  
+  <class id="7" language="java" name="java.util.EnumMap" project="JavaDemo" 
+    file="/devdata/java/jdk/jdk1.6.0_45/jre/lib/rt.jar" binary="true" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="329" y="528"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" accessors="true" 
+      visibility="true">      
+      <attributes public="false" package="false" protected="false" private="false" static="true"/>      
+      <operations public="false" package="false" protected="false" private="false" static="true"/>    
+    </display>  
+  </class>  
+  <class id="8" language="java" name="java.util.TreeMap" project="JavaDemo" 
+    file="/devdata/java/jdk/jdk1.6.0_45/jre/lib/rt.jar" binary="true" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="499" y="526"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" accessors="true" 
+      visibility="true">      
+      <attributes public="false" package="false" protected="false" private="false" static="true"/>      
+      <operations public="false" package="false" protected="false" private="false" static="true"/>    
+    </display>  
+  </class>  
+  <class id="9" language="java" name="java.util.WeakHashMap" project="JavaDemo" 
+    file="/devdata/java/jdk/jdk1.6.0_45/jre/lib/rt.jar" binary="true" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="609" y="374"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" accessors="true" 
+      visibility="true">      
+      <attributes public="false" package="false" protected="false" private="false" static="true"/>      
+      <operations public="false" package="false" protected="false" private="false" static="true"/>    
+    </display>  
+  </class>  
+  <generalization id="10">    
+    <end type="SOURCE" refId="9"/>    
+    <end type="TARGET" refId="2"/>  
+  </generalization>  
+  <generalization id="11">    
+    <end type="SOURCE" refId="8"/>    
+    <end type="TARGET" refId="2"/>  
+  </generalization>  
+  <realization id="12">    
+    <end type="SOURCE" refId="5"/>    
+    <end type="TARGET" refId="1"/>  
+  </realization>  
+  <generalization id="13">    
+    <end type="SOURCE" refId="3"/>    
+    <end type="TARGET" refId="2"/>  
+  </generalization>  
+  <realization id="14">    
+    <end type="SOURCE" refId="4"/>    
+    <end type="TARGET" refId="1"/>  
+  </realization>  
+  <realization id="15">    
+    <end type="SOURCE" refId="2"/>    
+    <end type="TARGET" refId="1"/>  
+  </realization>  
+  <realization id="16">    
+    <end type="SOURCE" refId="3"/>    
+    <end type="TARGET" refId="1"/>  
+  </realization>  
+  <generalization id="17">    
+    <end type="SOURCE" refId="7"/>    
+    <end type="TARGET" refId="2"/>  
+  </generalization>  
+  <realization id="18">    
+    <end type="SOURCE" refId="9"/>    
+    <end type="TARGET" refId="1"/>  
+  </realization>  
+  <generalization id="19">    
+    <end type="SOURCE" refId="6"/>    
+    <end type="TARGET" refId="3"/>  
+  </generalization>  
+  <generalization id="20">    
+    <end type="SOURCE" refId="5"/>    
+    <end type="TARGET" refId="2"/>  
+  </generalization>  
+  <realization id="21">    
+    <end type="SOURCE" refId="6"/>    
+    <end type="TARGET" refId="1"/>  
+  </realization>  
+  <classifier-display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
+    accessors="true" visibility="true">    
+    <attributes public="true" package="true" protected="false" private="false" static="true"/>    
+    <operations public="true" package="true" protected="false" private="false" static="true"/>  
+  </classifier-display>  
+  <association-display labels="true" multiplicity="true"/>
+</class-diagram>

Java/Java源代码/codedemo/java/util/timer/TimerDemo.java

@@ -0,0 +1,47 @@
+package cn.aofeng.demo.java.util.timer;
+
+import java.util.Timer;
+import java.util.TimerTask;
+
+import cn.aofeng.demo.util.DateUtil;
+
+/**
+ * {@link Timer}的使用示例：<br>
+ * 定时任务1：执行过程中会抛出异常。<br>
+ * 定时任务2：执行过程中不会抛出异常。<br>
+ * <br>
+ * 目的：检测java.util.Timer在执行定时任务的过程中，任务内抛出异常没有捕捉时在下一次执行时间到来时，是否可以正常执行。<br>
+ * 测试的JDK版本：1.6.xx。<br>
+ * 结果：不通过，定时任务抛出异常时，整个Timer中止，其他定时任务也中止。
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public class TimerDemo {
+
+    public static void main(String[] args) {
+        Timer timer = new Timer("aofeng-timer-demo");
+        timer.schedule(new ThrowExceptionTask(), DateUtil.getNextMinute(), 60*1000);
+        timer.schedule(new NotThrowExceptionTask(), DateUtil.getNextMinute(), 60*1000);
+    }
+
+    static class ThrowExceptionTask extends TimerTask {
+
+        @Override
+        public void run() {
+            System.out.println("任务名:ThrowExceptionTask, 当前时间:"+DateUtil.getCurrentTime());
+            
+            throw new IllegalArgumentException();
+        }
+        
+    } // end of ThrowExceptionTask
+    
+    static class NotThrowExceptionTask extends TimerTask {
+        
+        @Override
+        public void run() {
+            System.out.println("任务名:NotThrowExceptionTask, 当前时间:"+DateUtil.getCurrentTime());
+        }
+        
+    } // end of NotThrowExceptionTask
+
+}