设计模式： Proxy

Author: laileon

src/com/blankj/csutom/Proxy/dynamicProxy/Client.java

@@ -0,0 +1,13 @@
+package com.blankj.csutom.Proxy.dynamicProxy;
+
+import java.lang.reflect.InvocationHandler;
+
+public class Client {
+    public static void main(String[] args) {
+        ISubject subject = new RealSubject();
+
+        InvocationHandler handler = new MyInvocationHandler(subject);
+        ISubject proxy = DynamicProxy.newProxyInstance(subject.getClass().getClassLoader(), subject.getClass().getInterfaces(), handler);
+        proxy.request();
+    }
+}

src/com/blankj/csutom/Proxy/dynamicProxy/DynamicProxy.java

@@ -0,0 +1,11 @@
+package com.blankj.csutom.Proxy.dynamicProxy;
+
+import java.lang.reflect.InvocationHandler;
+import java.lang.reflect.Proxy;
+
+public class DynamicProxy<T> {
+    @SuppressWarnings("unchecked")
+    public static <T> T newProxyInstance(ClassLoader classLoader, Class<?>[] interfaces, InvocationHandler handler) {
+        return (T) Proxy.newProxyInstance(classLoader, interfaces, handler);
+    }
+}

src/com/blankj/csutom/Proxy/dynamicProxy/ISubject.java

@@ -0,0 +1,6 @@
+package com.blankj.csutom.Proxy.dynamicProxy;
+
+//https://www.jianshu.com/p/78fdd12c2c71
+public interface ISubject {
+    void request();
+}

src/com/blankj/csutom/Proxy/dynamicProxy/MyInvocationHandler.java

@@ -0,0 +1,17 @@
+package com.blankj.csutom.Proxy.dynamicProxy;
+
+import java.lang.reflect.InvocationHandler;
+import java.lang.reflect.Method;
+
+public class MyInvocationHandler implements InvocationHandler {
+    private Object target = null;
+
+    public MyInvocationHandler(Object object) {
+        this.target = object;
+    }
+
+    @Override
+    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
+        return method.invoke(this.target, args);
+    }
+}

src/com/blankj/csutom/Proxy/dynamicProxy/RealSubject.java

@@ -0,0 +1,8 @@
+package com.blankj.csutom.Proxy.dynamicProxy;
+
+public class RealSubject implements ISubject {
+    @Override
+    public void request() {
+        System.out.println("我是真实对象");
+    }
+}

src/com/blankj/csutom/Proxy/staticProxy/Client.java

@@ -0,0 +1,9 @@
+package com.blankj.csutom.Proxy.staticProxy;
+
+public class Client {
+    public static void main(String[] args) {
+        ISubject subject = new RealSubject();
+        Proxy proxy = new Proxy(subject);
+        proxy.request();
+    }
+}

src/com/blankj/csutom/Proxy/staticProxy/ISubject.java

@@ -0,0 +1,6 @@
+package com.blankj.csutom.Proxy.staticProxy;
+
+//https://www.jianshu.com/p/78fdd12c2c71
+public interface ISubject {
+    void request();
+}

src/com/blankj/csutom/Proxy/staticProxy/Proxy.java

@@ -0,0 +1,14 @@
+package com.blankj.csutom.Proxy.staticProxy;
+
+public class Proxy implements ISubject {
+    private ISubject subject;
+
+    public Proxy(ISubject subject) {
+        this.subject = subject;
+    }
+
+    @Override
+    public void request() {
+        this.subject.request();
+    }
+}

src/com/blankj/csutom/Proxy/staticProxy/RealSubject.java

@@ -0,0 +1,8 @@
+package com.blankj.csutom.Proxy.staticProxy;
+
+public class RealSubject implements ISubject{
+    @Override
+    public void request() {
+        System.out.println("我是真实对象");
+    }
+}

src/com/blankj/medium/_017/Solution.java

@@ -13,7 +13,7 @@
  * </pre>
  */
 public class Solution {
-//    private static String[] map = new String[]{"abc", "def", "ghi", "jkl", "mno", "pqrs", "tuv", "wxyz"};
+//    private staticProxy String[] map = new String[]{"abc", "def", "ghi", "jkl", "mno", "pqrs", "tuv", "wxyz"};
 //
 //    public List<String> letterCombinations(String digits) {
 //        if (digits.length() == 0) return Collections.emptyList();