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69期-Java SE-025-动态代理

news 来源：原创 2024/5/18 19:14:22

Apple.java

package com.southwind.dymicproxy;

public class Apple implements Phone {

    @Override
    public String salePhone() {
        // TODO Auto-generated method stub
        return "销售iPhone手机";
    }

}

Benz.java

package com.southwind.dymicproxy;

public class Benz implements Car {

    @Override
    public String saleCar() {
        // TODO Auto-generated method stub
        return "销售奔驰汽车";
    }

}

BMW.java

package com.southwind.dymicproxy;

public class BMW implements Car {

    @Override
    public String saleCar() {
        // TODO Auto-generated method stub
        return "销售宝马汽车";
    }

}

Car.java

package com.southwind.dymicproxy;

public interface Car {
    public String saleCar();
}

House.java

package com.southwind.dymicproxy;

public interface House {
    public String saleHouse();
}

HuaWei.java

package com.southwind.dymicproxy;

public class HuaWei implements Phone {

    @Override
    public String salePhone() {
        // TODO Auto-generated method stub
        return "销售华为手机";
    }

}

MyInvocationHandler.java

package com.southwind.dymicproxy;

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

public class MyInvocationHandler implements InvocationHandler {
    private Object obj;
    
    //返回代理对象
    public Object bind(Object obj) {
        this.obj = obj;
        return Proxy.newProxyInstance(MyInvocationHandler.class.getClassLoader(), this.obj.getClass().getInterfaces(), this);  
    }

    @Override
    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
        // TODO Auto-generated method stub
        System.out.println("日志。。。");
        return method.invoke(this.obj, args);
    }

}

Num.java

package com.southwind.dymicproxy;

public class Num implements House {

    @Override
    public String saleHouse() {
        // TODO Auto-generated method stub
        return "卖别墅";
    }

}

Phone.java

package com.southwind.dymicproxy;

public interface Phone {
    public String salePhone();
}

Test.java

package com.southwind.dymicproxy;

public class Test {
    public static void main(String[] args) {
        Phone phone = new Apple();
        //获取代理对象
        MyInvocationHandler myInvocationHandler = new MyInvocationHandler();
        Phone proxy = (Phone)myInvocationHandler.bind(phone);
        System.out.println(proxy.salePhone());
        Car car = new BMW();
        Car carProxy = (Car)myInvocationHandler.bind(car);
        System.out.println(carProxy.saleCar());
        House house = new Num();
        House houseProxy = (House)myInvocationHandler.bind(house);
        System.out.println(houseProxy.saleHouse());
    }
}

Cal.java

package com.southwind.proxy;

public interface Cal {
    public int add(int num1,int num2);
    public int sub(int num1,int num2);
    public int mul(int num1,int num2);
    public int div(int num1,int num2);
}

CalImpl.java

package com.southwind.proxy;

public class CalImpl implements Cal {
    
    @Override
    public int add(int num1, int num2) {
        // TODO Auto-generated method stub
        int result = num1+num2;
        return result;
    }
    
    @Override
    public int sub(int num1, int num2) {
        // TODO Auto-generated method stub
        int result = num1-num2;
        return result;
    }

    @Override
    public int mul(int num1, int num2) {
        // TODO Auto-generated method stub
        int result = num1*num2;
        return result;
    }

    @Override
    public int div(int num1, int num2) {
        // TODO Auto-generated method stub
        int result = num1/num2;
        return result;
    }

}

MyInvocationHandler.java

package com.southwind.proxy;

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

public class MyInvocationHandler implements InvocationHandler {
    //委托对象
    private Object object;
    
    //返回代理对象
    public Object bind(Object object) {
        this.object = object;
        return Proxy.newProxyInstance(MyInvocationHandler.class.getClassLoader(), this.object.getClass().getInterfaces(), this); 
    }

    @Override
    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
        // TODO Auto-generated method stub
        System.out.println(method.getName()+"方法的参数是："+Arrays.toString(args));
        Object result = method.invoke(this.object, args);
        System.out.println(method.getName()+"方法的执行结果是："+result);
        return result;
    }

}

Test.java

package com.southwind.proxy;

public class Test {
    public static void main(String[] args) {
        Cal cal = new CalImpl();
        //获取动态代理对象
        MyInvocationHandler myInvocationHandler = new MyInvocationHandler();
        Cal proxy = (Cal) myInvocationHandler.bind(cal);
        System.out.println(proxy.add(10, 1));
        System.out.println(proxy.sub(20, 2));
        System.out.println(proxy.mul(30, 3));
        System.out.println(proxy.div(40, 4));
    }
}

Apple.java

package com.southwind.staticproxy;

public class Apple implements Phone {

    @Override
    public String salePhone() {
        // TODO Auto-generated method stub
        return "销售iPhone手机";
    }

}

Benz.java

package com.southwind.staticproxy;

public class Benz implements Car {

    @Override
    public String saleCar() {
        // TODO Auto-generated method stub
        return "销售奔驰汽车";
    }

}

BMW.java

package com.southwind.staticproxy;

public class BMW implements Car {

    @Override
    public String saleCar() {
        // TODO Auto-generated method stub
        return "销售宝马汽车";
    }

}

Car.java

package com.southwind.staticproxy;

public interface Car {
    public String saleCar();
}

CarProxy.java

package com.southwind.staticproxy;

public class CarProxy implements Car {
    
    private Car car;
    
    public CarProxy(Car car) {
        this.car = car;
    }

    @Override
    public String saleCar() {
        // TODO Auto-generated method stub
        System.out.println("汽车日志。。。");
        return this.car.saleCar();
    }

}

House.java

package com.southwind.staticproxy;

public interface House {
    public String saleHouse();
}

Huawei.java

package com.southwind.staticproxy;

public class HuaWei implements Phone {

    @Override
    public String salePhone() {
        // TODO Auto-generated method stub
        return "销售华为手机";
    }

}

Phone.java

package com.southwind.staticproxy;

public interface Phone {
    public String salePhone();
}

PhoneProxy.java

package com.southwind.staticproxy;

public class PhoneProxy implements Phone {
    
    private Phone phone;
    
    public PhoneProxy(Phone phone) {
        this.phone = phone;
    }

    @Override
    public String salePhone() {
        // TODO Auto-generated method stub
        System.out.println("日志。。。");
        return this.phone.salePhone();
    }

}

Proxy.java

package com.southwind.staticproxy;

public class Proxy implements Car,Phone,House{
    
    private Object obj;
    
    public Proxy(Object obj) {
        this.obj = obj;
    }

    @Override
    public String saleCar() {
        // TODO Auto-generated method stub
        System.out.println("汽车日志。。。");
        if(obj instanceof Car) {
            Car car = (Car) obj;
            return car.saleCar();
        }else {
            System.out.println("数据类型错误");
            return null;
        }
    }

    @Override
    public String salePhone() {
        // TODO Auto-generated method stub
        System.out.println("手机日志。。。");
        if(obj instanceof Phone) {
            Phone phone = (Phone) obj;
            return phone.salePhone();
        }else {
            System.out.println("数据类型错误");
            return null;
        }
    }

    @Override
    public String saleHouse() {
        // TODO Auto-generated method stub
        return null;
    }

}

Test.java

package com.southwind.staticproxy;

public class Test {
    public static void main(String[] args) {
        Phone phone1 = new Apple();
        
        Phone phone2 = new HuaWei();
        PhoneProxy phoneProxy = new PhoneProxy(phone1);
        System.out.println(phoneProxy.salePhone());
    }
}

Test2.java

package com.southwind.staticproxy;

public class Test2 {
    public static void main(String[] args) {
        Car car = new BMW();
        CarProxy carProxy = new CarProxy(car);
        System.out.println(carProxy.saleCar());
    }
}

Test3.java

package com.southwind.staticproxy;

public class Test3 {
    public static void main(String[] args) {
        Phone phone = new Apple();
        Proxy proxy = new Proxy(phone);
        System.out.println(proxy.salePhone());
        Car car = new Benz();
        proxy = new Proxy(car);
        System.out.println(proxy.saleCar());
    }
}