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coderzyjcoderzyj
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动态代理 （jdk）
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11 files changed

+131
-11
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11 files changed

+131
-11
lines changed

‎.idea/libraries/javassist.xml

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‎.idea/modules.xml

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‎java-Javassist/java-Javassist.iml

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</content>
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<orderEntry type="inheritedJdk" />
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<orderEntry type="sourceFolder" forTests="false" />
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<orderEntry type="module-library" exported="">
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<library>
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<CLASSES>
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<root url="jar://$USER_HOME$/Desktop/jboss-javassist-javassist-85d69ea/javassist.jar!/" />
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</CLASSES>
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<JAVADOC />
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<SOURCES />
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</library>
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</orderEntry>
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<orderEntry type="library" exported="" name="javassist" level="project" />
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</component>
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</module>

‎java-Javassist/src/com/zyj/javassist/Demo02.java

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import java.io.IOException;
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import java.lang.reflect.Field;
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import java.lang.reflect.Method;
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import java.text.MessageFormat;
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import java.util.Arrays;
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/**

‎java-proxy/java-proxy.iml

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<?xml version="1.0" encoding="UTF-8"?>
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<module type="JAVA_MODULE" version="4">
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<component name="NewModuleRootManager" inherit-compiler-output="true">
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<exclude-output />
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<content url="file://$MODULE_DIR$">
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<sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
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</content>
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<orderEntry type="inheritedJdk" />
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<orderEntry type="sourceFolder" forTests="false" />
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</component>
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</module>

‎java-proxy/src/com/asher/proxy/ProxyStudent.java

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package com.asher.proxy;
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import sun.misc.ProxyGenerator;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileOutputStream;
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import java.lang.reflect.InvocationHandler;
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import java.lang.reflect.Method;
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import java.lang.reflect.Proxy;
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/**
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* 版权声明：CopyRight (c) 2018 ucarinc. All Rights Reserved.
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*
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* @author : 张勇杰
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* @date : 2019/1/17 20:59
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* @Version : v1.0
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* @description 动态代理
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**/
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public class ProxyStudent implements InvocationHandler {
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private Object target;
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public Object getProxyInstance(Object t){
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this.target = t;
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return Proxy.newProxyInstance(this.target.getClass().getClassLoader(),new Class[]{Student.class},this);
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}
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@Override
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public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
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byte[] bytes = ProxyGenerator.generateProxyClass("$proxy0", new Class[]{Student.class});
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File file = new File(this.getClass().getResource("").getPath()+File.separator+proxy.getClass().getSimpleName()+".class");
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FileOutputStream fos = new FileOutputStream(file);
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fos.write(bytes);
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fos.flush();
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/*if(!file.exists()){
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file.createNewFile();
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}
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FileOutputStream fos = new FileOutputStream(file);
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FileInputStream fis = new FileInputStream(file);
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int len = 0;
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byte[] buff = new byte[1024];
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while((len=fis.read(buff))!=-1){
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fos.write(buff,0,len);
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}
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fis.close();
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fos.close();*/
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System.out.println("大炮揍了小明一顿");
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method.invoke(this.target,args);
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System.out.println("大炮再次打了小明一顿");
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return null;
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}
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}

‎java-proxy/src/com/asher/proxy/Student.java

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package com.asher.proxy;
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/**
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* 版权声明：CopyRight (c) 2018 ucarinc. All Rights Reserved.
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*
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* @author : 张勇杰
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* @date : 2019/1/17 20:58
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* @Version : v1.0
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* @description
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**/
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public interface Student {
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void say();
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}

‎java-proxy/src/com/asher/proxy/Test.java

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package com.asher.proxy;
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/**
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* 版权声明：CopyRight (c) 2018 ucarinc. All Rights Reserved.
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*
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* @author : 张勇杰
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* @date : 2019/1/17 21:03
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* @Version : v1.0
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* @description
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**/
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public class Test {
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public static void main(String[] args) {
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Student sd = (Student) new ProxyStudent().getProxyInstance(new XiaoMing());
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sd.say();
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}
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}

‎java-proxy/src/com/asher/proxy/XiaoMing.java

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package com.asher.proxy;
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/**
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* 版权声明：CopyRight (c) 2018 ucarinc. All Rights Reserved.
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*
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* @author : 张勇杰
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* @date : 2019/1/17 21:01
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* @Version : v1.0
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* @description
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**/
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public class XiaoMing implements Student{
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@Override
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public void say() {
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System.out.println("小明说他很叼");
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}
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}

‎java-reflect/src/com/zyj/reflect/Demo02.java

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@@ -21,7 +21,7 @@ public static void main(String[] args) throws NoSuchFieldException, NoSuchMethod
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try {
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Class clazz = Class.forName(path);
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//获取类的名字
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System.out.println(clazz.getName());//获取包名+类名：com.zyj.bean
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System.out.println(clazz.getName());//获取包名+类名：com.zyj.bean
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System.out.println(clazz.getSimpleName()); //获取类名：User
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//获取属性信息
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//Field[] fields = clazz.getFields();//此方法只能获得public的field

‎java-reflect/src/com/zyj/reflect/Demo04.java

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}
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}
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}
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Method m2 = Demo04.class.getMethod("test02");
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Type returnType = m2.getGenericReturnType();
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System.out.println(returnType);
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if(returnType instanceof ParameterizedType){
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Type[] genericTypes = ((ParameterizedType) returnType).getActualTypeArguments();
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for(Type t:genericTypes){
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System.out.println("--"+t);
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}
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}
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}
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}

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