Java 静态代理

创建目标接口

public interface TargetInterface {

    public void sayHello(String name);

    public void sayThanks(String name);

}

目标接口实现类

public class TargetInterfaceImpl implements TargetInterface{

    @Override
    public void sayHello(String name) {
        System.out.println("sayHello, " + name);
    }

    @Override
    public void sayThanks(String name) {
        System.out.println("sayThanks, " + name);
    }

}

目标接口代理类

public class TargetProxy implements TargetInterface {

    // 持有目标接口的引用
    private TargetInterface targetInterface;

    // 构造方法初始化
    public TargetProxy(TargetInterface targetInterface) {
        this.targetInterface = targetInterface;
    }


    @Override
    public void sayHello(String name) {

        System.out.println("start.........");

        // 中间调用目标接口的真正的实现
        targetInterface.sayHello(name);

        System.out.println("end.........");


    }

    @Override
    public void sayThanks(String name) {

        System.out.println("start.........");

        // 中间调用目标接口的真正的实现
        targetInterface.sayThanks(name);

        System.out.println("end.........");
    }

测试类

public class Test1 {
    public static void main(String[] args) {

        // 没有代理的情况
        TargetInterface targetInterface = new TargetInterfaceImpl();
        targetInterface.sayHello("张三");

        System.out.println("--------------分界线----------");

        // 实现静态代理的情况
        TargetProxy targetProxy = new TargetProxy(new TargetInterfaceImpl());
        targetProxy.sayHello("李四");

    }
}

输出结果

Java JDK动态代理_Excellent999的博客-优快云博客

Java CGLib动态代理_Excellent999的博客-优快云博客

Java Javassist动态代理-优快云博客