Java内容重新整理删除过期的东西

Java/JavaDemo/codedemo/json/gson/ArrayDeserialize.java

@@ -0,0 +1,45 @@
+package cn.aofeng.demo.json.gson;
+
+import com.google.gson.Gson;
+
+/**
+ * 数组的反序列化。
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public class ArrayDeserialize {
+
+    public <T> T deserialize(String json, Class<T> claz) {
+        Gson gson = new Gson();
+        return gson.fromJson(json, claz);
+    }
+    
+    public static void main(String[] args) {
+        ArrayDeserialize ad = new ArrayDeserialize();
+        
+        // 整型数组
+        String intArrJson = "[9,7,5]";
+        int[] intArr = ad.deserialize(intArrJson, int[].class);
+        System.out.println("---------- 整型数组 ----------");
+        for (int i : intArr) {
+            System.out.println(i);
+        }
+        
+        // 字符串数组
+        String strArrJson = "[\"张三\",\"李四\",\"王五\"]";
+        String[] strArr = ad.deserialize(strArrJson, String[].class);
+        System.out.println("---------- 字符串数组 ----------");
+        for (String str : strArr) {
+            System.out.println(str);
+        }
+        
+        // 对象数组
+        String objArrJson = "[{\"name\":\"小明\",\"age\":10},{\"name\":\"马丽\",\"age\":9}]";
+        Person[] objArr = ad.deserialize(objArrJson, Person[].class);
+        System.out.println("---------- 对象数组 ----------");
+        for (Person person : objArr) {
+            System.out.println(person);
+        }
+    }
+
+}

Java/JavaDemo/codedemo/json/gson/ArraySerialize.java

@@ -0,0 +1,41 @@
+package cn.aofeng.demo.json.gson;
+
+import com.google.gson.Gson;
+
+/**
+ * 数组的序列化。
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public class ArraySerialize {
+
+    public void serialize(Object[] arr) {
+        Gson gson = new Gson();
+        System.out.println( gson.toJson(arr) );
+    }
+    
+    public static void main(String[] args) {
+        ArraySerialize as = new ArraySerialize();
+        
+        // 整型对象数组
+        Integer[] intArr = new Integer[3];
+        intArr[0] = 9;
+        intArr[1] = 7;
+        intArr[2] = 5;
+        as.serialize(intArr);
+        
+        // 字符串数组
+        String[] names = new String[3];
+        names[0] = "张三";
+        names[1] = "李四";
+        names[2] = "王五";
+        as.serialize(names);
+        
+        // 对象数组
+        Person[] persons = new Person[2];
+        persons[0] = new Person("小明", 10);
+        persons[1] = new Person("马丽", 9);
+        as.serialize(persons);
+    }
+
+}

Java/JavaDemo/codedemo/json/gson/CollectionDeserialize.java

@@ -0,0 +1,55 @@
+package cn.aofeng.demo.json.gson;
+
+import java.lang.reflect.Type;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+
+import com.google.gson.Gson;
+import com.google.gson.reflect.TypeToken;
+
+/**
+ * 集合的反序列化。
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public class CollectionDeserialize {
+
+    public <T> T deserialize(String json, Type type) {
+        Gson gson = new Gson();
+        return gson.fromJson(json, type);
+    }
+    
+    public static void main(String[] args) {
+        CollectionDeserialize cd = new CollectionDeserialize();
+        
+        //整型List
+        String intListJson = "[9,8,0]";
+        List<Integer> intList = cd.deserialize( intListJson, 
+                new TypeToken<List<Integer>>(){}.getType() );
+        System.out.println("---------- 整型List ----------");
+        for (Integer obj : intList) {
+            System.out.println(obj);
+        }
+        
+        // 字符串Set
+        String strSetJson = "[\"Best\",\"World\",\"Hello\"]";
+        Set<String> strSet = cd.deserialize( strSetJson, 
+                new TypeToken<Set<String>>(){}.getType() );
+        System.out.println("---------- 字符串Set ----------");
+        for (String str : strSet) {
+            System.out.println(str);
+        }
+        
+        // Map
+        String objMapJson = "{\"xiaomin\":{\"name\":\"小明\",\"age\":21},\"marry\":{\"name\":\"马丽\",\"age\":20}}";
+        Map<String, Person> objMap = cd.deserialize( objMapJson, 
+                new TypeToken<Map<String, Person>>(){}.getType() );
+        System.out.println("---------- Map ----------");
+        for (Entry<String, Person> entry : objMap.entrySet()) {
+            System.out.println(entry);
+        }
+    }
+
+}

Java/JavaDemo/codedemo/json/gson/CollectionsSerialize.java

@@ -0,0 +1,54 @@
+package cn.aofeng.demo.json.gson;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import com.google.gson.Gson;
+
+/**
+ * 集合的序列化。
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public class CollectionsSerialize {
+
+    public void serialize(Collection<?> c) {
+        Gson gson = new Gson();
+        System.out.println( gson.toJson(c) );
+    }
+    
+    public void serialize(Map<?, ?> map) {
+        Gson gson = new Gson();
+        System.out.println( gson.toJson(map) );
+    }
+    
+    public static void main(String[] args) {
+        CollectionsSerialize cs = new CollectionsSerialize();
+        
+        // 整型List
+        List<Integer> intList = new ArrayList<Integer>();
+        intList.add(9);
+        intList.add(8);
+        intList.add(0);
+        cs.serialize(intList);
+        
+        // 字符串Set
+        Set<String> strSet = new HashSet<String>();
+        strSet.add("Hello");
+        strSet.add("World");
+        strSet.add("Best");
+        cs.serialize(strSet);
+        
+        // Map
+        Map<String, Person> objMap = new HashMap<String, Person>();
+        objMap.put("marry", new Person("马丽", 20));
+        objMap.put("xiaomin", new Person("小明", 21));
+        cs.serialize(objMap);
+    }
+
+}

Java/JavaDemo/codedemo/json/gson/CustomDeserialize.java

@@ -0,0 +1,46 @@
+package cn.aofeng.demo.json.gson;
+
+import java.lang.reflect.Type;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonDeserializer;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParseException;
+
+/**
+ * 自定义反序列化。
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public class CustomDeserialize {
+
+    public static void main(String[] args) {
+        GsonBuilder builder = new GsonBuilder();
+        builder.registerTypeAdapter(Person.class, new PersonDeserializer());
+        Gson gson = builder.create();
+        
+        String json = "{\"PersonName\":\"aofeng\",\"PersonAge\":32}";
+        Person obj = gson.fromJson(json, Person.class);
+        System.out.println(obj); // 输出结果：Person [name=aofeng, age=32]
+    }
+
+    public static class PersonDeserializer implements JsonDeserializer<Person> {
+
+        @Override
+        public Person deserialize(JsonElement jsonEle, Type type,
+                JsonDeserializationContext context)
+                throws JsonParseException {
+            JsonObject jo = jsonEle.getAsJsonObject();
+            String name = jo.get("PersonName").getAsString();
+            int age = jo.get("PersonAge").getAsInt();
+            
+            Person obj = new Person(name, age);
+            return obj;
+        }
+        
+    } // end of PersonDeserializer
+
+}

Java/JavaDemo/codedemo/json/gson/CustomSerialize.java

@@ -0,0 +1,42 @@
+package cn.aofeng.demo.json.gson;
+
+import java.lang.reflect.Type;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonSerializationContext;
+import com.google.gson.JsonSerializer;
+
+/**
+ * 自定义序列化。
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public class CustomSerialize {
+
+    public static void main(String[] args) {
+        GsonBuilder builder = new GsonBuilder();
+        builder.registerTypeAdapter(Person.class, new PersonSerializer());
+        Gson gson = builder.create();
+        
+        Person obj = new Person("aofeng", 32);
+        System.out.println( gson.toJson(obj) ); // 输出结果：{"PersonName":"aofeng","PersonAge":32}
+    }
+
+    public static class PersonSerializer implements JsonSerializer<Person> {
+
+        @Override
+        public JsonElement serialize(Person obj, Type type,
+                JsonSerializationContext context) {
+            JsonObject jo = new JsonObject();
+            jo.addProperty("PersonName", obj.getName());
+            jo.addProperty("PersonAge", obj.getAge());
+            
+            return jo;
+        }
+        
+    } // end of PersonSerializer
+    
+}

Java/JavaDemo/codedemo/json/gson/Person.java

@@ -0,0 +1,50 @@
+package cn.aofeng.demo.json.gson;
+
+/**
+ * 简单的Java对象。
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public class Person {
+
+    private String name;
+    
+    private int age;
+
+    public Person() {
+        // nothing
+    }
+    
+    @SuppressWarnings("unused")
+    private void reset() {
+        name = null;
+        age = 0;
+    }
+    
+    public Person(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
+    
+    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;
+    }
+
+    @Override
+    public String toString() {
+        return "Person [name=" + name + ", age=" + age + "]";
+    }
+
+}

Java/JavaDemo/codedemo/json/gson/SimpleObjectSerialize.java

@@ -0,0 +1,39 @@
+package cn.aofeng.demo.json.gson;
+
+import com.google.gson.Gson;
+
+/**
+ * Java简单对象的序列化与反序列化。
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public class SimpleObjectSerialize {
+
+    /**
+     * 序列化：将Java对象转换成JSON字符串。
+     */
+    public void serialize(Person person) {
+        Gson gson = new Gson();
+        System.out.println( gson.toJson(person) );
+    }
+    
+    /**
+     * 反序列化：将JSON字符串转换成Java对象。
+     */
+    public void deserialize(String json) {
+        Gson gson = new Gson();
+        Person person = gson.fromJson(json, Person.class);
+        System.out.println( person );
+    }
+    
+    public static void main(String[] args) {
+        SimpleObjectSerialize ss = new SimpleObjectSerialize();
+        
+        Person person = new Person("NieYong", 33);
+        ss.serialize(person);
+        
+       String json = " {\"name\":\"AoFeng\",\"age\":32}";
+       ss.deserialize(json);
+    }
+
+}