静态代理示例

一、程序结构图

二、程序代码

1.接口类UserManager.java

package com.my_spring;

public interface UserManager {
	public void addUser(String username, String password);
	public void deleteUser(int id);
	public void modifyUser(int id, String username, String password);
	public String findUserById(int id);
}

2.接口实现类UserManagerImpl.java

package com.my_spring;

public class UserManagerImpl implements UserManager {

	public void addUser(String username, String password) {
		System.out.println("-------UserManagerImpl.addUser()-------");
	}

	public void deleteUser(int id) {
		System.out.println("-------UserManagerImpl.deleteUser()-------");
	}

	public void modifyUser(int id, String username, String password) {
		System.out.println("-------UserManagerImpl.modifyUser()-------");
	}

	public String findUserById(int id) {
		System.out.println("-------UserManagerImpl.findUserById()-------");
		return null;
	}

}

3.静态代理类UserManagerImplProxy.java

package com.my_spring;

public class UserManagerImplProxy implements UserManager {
	
	private UserManager userManager;
	
	public UserManagerImplProxy(UserManager userManager) {
		checkSecurity();
		this.userManager = userManager;
	}
	
	public void addUser(String username, String password) {
		this.userManager.addUser(username, password);
	}

	public void deleteUser(int id) {
		this.userManager.deleteUser(id);
	}

	public void modifyUser(int id, String username, String password) {
		this.modifyUser(id, username, password);
	}

	public String findUserById(int id) {
		this.userManager.findUserById(id);
		return null;
	}
	
	private void checkSecurity() {
		System.out.println("--------checkSecurity()--------");
	}
}

4.测试测序Client.java

package com.my_spring;

public class Client {
	public static void main(String[] args) {
		UserManager userManager = new UserManagerImplProxy(new UserManagerImpl());;
		userManager.addUser("木星人", "123");
	}
}