Java内容重新整理删除过期的东西

2026-02-06 12:04:05 +08:00 · 2025-09-14 03:49:42 -04:00
parent 9b8524ff80
commit 885b795e45
413 changed files with 643 additions and 1340 deletions
--- a/Java/JavaDemo/codedemo/aspectj/BusinessService.java
+++ b/Java/JavaDemo/codedemo/aspectj/BusinessService.java
@@ -0,0 +1,142 @@
+package cn.aofeng.demo.aspectj;
+
+/**
+ * 模拟业务方法，将被Aspectj织入代码，增加功能。
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public class BusinessService {
+
+    public long add(int a, int b) {
+        return a+b;
+    }
+    
+    public long add(int a, int b, int... other) {
+        long result = a + b;
+        for (int i : other) {
+            result += i;
+        }
+        
+        return result;
+    }
+
+    public String join(String first, String... appends) {
+        if (null == first) {
+            throw new IllegalArgumentException("first is null");
+        }
+        StringBuilder buffer = new StringBuilder();
+        buffer.append(first);
+        for (String str : appends) {
+            buffer.append(str);
+        }
+        
+        return buffer.toString();
+    }
+
+    public String addPrefix(String src) {
+        if (null == src) {
+            throw new IllegalArgumentException("src is null");
+        }
+        
+        return "-->"+src;
+    }
+
+    public static void printLine(char style) {
+        if ('=' == style) {
+            System.out.println("========================================================================================");
+        } else if ('-' == style) {
+            System.out.println("----------------------------------------------------------------------------------------");
+        } else {
+            System.out.println(" ");
+        }
+    }
+    
+    public static void main(String[] args) {
+        final BusinessService bs = new BusinessService();
+        
+        System.out.println("1、执行方法add(int, int)");
+        RunMethod rm = new RunMethod() {
+            
+            @Override
+            public void run() {
+                long result = bs.add(1, 2);
+                System.out.println(">>> 结果：" + result);
+            }
+        };
+        rm.execute();
+        
+        System.out.println("2、执行方法add(int, int, int...)");
+        rm = new RunMethod() {
+            
+            @Override
+            public void run() {
+                long result = bs.add(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
+                System.out.println(">>> 结果：" + result);
+            }
+        };
+        rm.execute();
+        
+        System.out.println("3、执行方法join(String, String...)");
+        rm = new RunMethod() {
+            
+            @Override
+            public void run() {
+                String str = bs.join("first", "-second", "-third");
+                System.out.println(">>> 结果：" + str);
+            }
+        };
+        rm.execute();
+        
+        System.out.println("4、执行方法join(String, String...)");
+        rm = new RunMethod() {
+            
+            @Override
+            public void run() {
+                String str = bs.join(null, "-second", "-third");
+                System.out.println(">>> 结果：" + str);
+            }
+        };
+        rm.execute();
+        
+        System.out.println("5、执行方法addPrefix(String)");
+        rm = new RunMethod() {
+            
+            @Override
+            public void run() {
+                String str = bs.addPrefix("原字符串");
+                System.out.println(">>> 结果：" + str);
+            }
+        };
+        rm.execute();
+        
+        System.out.println("6、执行方法addPrefix(String)");
+        rm = new RunMethod() {
+            
+            @Override
+            public void run() {
+                String str = bs.addPrefix(null);
+                System.out.println(">>> 结果：" + str);
+            }
+        };
+        rm.execute();
+    }
+
+    public static abstract class RunMethod {
+        
+        private char _style = '=';
+        
+        public void execute() {
+            printLine(_style);
+            try {
+                run();
+            } catch (Exception e) {
+                e.printStackTrace(System.err);
+            }
+            printLine(_style);
+            printLine(' ');
+        }
+        
+        public abstract void run();
+    }
+
+}