欧美性猛交XXXX免费看蜜桃,成人网18免费韩国,亚洲国产成人精品区综合,欧美日韩一区二区三区高清不卡,亚洲综合一区二区精品久久

摘要筆記：代理實(shí)現了方法的擴充。代理都要實(shí)現接口，static--被代理類(lèi)的接口；

dynamic--InvocationHandler，實(shí)現invoke方法創(chuàng )建對象object傳給method.invoke(object,orgs)--執行代理方法；

CGLIB--MethodInterceptor,創(chuàng )建對象object并重寫(xiě)intercept方法，通過(guò)method.invoke--執行代理。

接口

//Person.java
package heqing.spring.proxy;

public interface Person {    
    public void say();
}

具體類(lèi)

 //Student.java
 1 package heqing.spring.proxy;

public class Student implements Person {
    private String sname;
    public Student() {
        sname="Student";
    }
    public void say() {
        System.out.println("My name is "+sname+",I'm a student");
    }
}

//Teacher.java
　package heqing.spring.proxy;
public class Teacher implements Person {
    private String tname;
    public Teacher() {
        tname="teacher";
    }
    public void say() {
        System.out.println("My name is "+tname+",I'm a teacher");
    }
}

靜態(tài)代理，動(dòng)態(tài)代理，CGLIB代理

//StaticProxy
 1 package heqing.spring.proxy;

public class StaticProxy implements Person {
    private Person person;
    public StaticProxy(Person person) {
        this.person=person;
    }
    @Override
    public void say() {
        System.out.println("I'm StaticProxy.");
        person.say();
        System.out.println("I'm over Excute");
    }
}

 //DynamicProxy.java
 1 package heqing.spring.proxy;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;

public class DynamicProxy implements InvocationHandler {
    private Object obj;
    public Object createInstance(Object obj){
        this.obj=obj;
        return Proxy.newProxyInstance(obj.getClass().getClassLoader(), obj.getClass().getInterfaces(), this);
    }
    
    @Override
    public Object invoke(Object proxy, Method method, Object[] args)
            throws Throwable {
        System.out.println("I'm DynamicProxy");
        Object result=method.invoke(obj, args);
        return null;
    }
}

 //CGLIBProxy.java
 1 package heqing.spring.proxy;

import java.lang.reflect.Method;

import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.MethodProxy;

public class CGLIBProxy implements MethodInterceptor {
    Object obj;
    public Object createInstance(Object object){
        obj=object;
        Enhancer enchaner=new Enhancer();
        enchaner.setSuperclass(obj.getClass());
        enchaner.setCallback(this);
        return enchaner.create();
    }
    @Override
    public Object intercept(Object Proxy, Method method, Object[] args,
            MethodProxy methodProxy) throws Throwable {
        System.out.println("I'm MethodInterceptor");
        Object result=method.invoke(obj, args);
        System.out.println(method.getName());
        return result;
    }
}

測試類(lèi)

//TestStaticProxy.java
package heqing.spring.proxy;

public class TestStaticProxy {
    public static void main(String[] args) {
        StaticProxy sp=new StaticProxy(new Student());
        sp.say();
    }
}

//TestDynamicProxy.java
package heqing.spring.proxy;

public class TestDynamicProxy {
    public static void main(String[] args) {
        DynamicProxy dynamicProxy=new DynamicProxy();
        Person t=(Person)dynamicProxy.createInstance(new Student());
        t.say();        
    }
}

//TestCGLIBProxy.java
package heqing.spring.proxy;

public class TestCGLIBProxy {
    public static void main(String[] args) {
        CGLIBProxy proxy=new CGLIBProxy();
        Person person=(Person)proxy.createInstance(new Teacher());
        person.say();
    }
}