Spring框架中的aop

标签：spring aop 代理 javaee

1.建立了日志类

package cn.edu.proxy.cglibproxy;

public class Logger {

	
	public void logging() {
		// TODO Auto-generated method stub
		System.out.println("logging");
	}
	
}

package cn.edu.proxy.cglibproxy;

public class Security  {

	
	public void security() {
		// TODO Auto-generated method stub
		System.out.println("security");
	}
	
	
}

package cn.edu.proxy.cglibproxy;

public class Privilege {
	private String access;

	public String getAccess() {
		return access;
	}

	public void setAccess(String access) {
		this.access = access;
	}
	

}

package cn.edu.proxy.cglibproxy;

public interface SalaryManager {
	public void showSalary();
	
}

package cn.edu.proxy.cglibproxy;

public class SalaryManagerImpl implements SalaryManager {

	@Override
	public void showSalary() {
		// TODO Auto-generated method stub
		System.out.println("查看工资");
	}
	

}

如果满足access为admin就执行方法，否则就输出没有权限

package cn.edu.proxy.cglibproxy;

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

public class SalaryInterceptor implements InvocationHandler{
	private Object target;
	private Logger logger;
	private Security security;
	private Privilege privilege;
	
	public SalaryInterceptor(Object target, Logger logger, Security security,
			Privilege privilege) {
		super();
		this.target= target;
		this.logger = logger;
		this.security = security;
		this.privilege = privilege;
	}


	@Override
	public Object invoke(Object proxy, Method method, Object[] args)
			throws Throwable {
		// TODO Auto-generated method stub
		if(this.privilege.getAccess().equals("admin")){
			this.logger.logging();
			this.security.security();
			method.invoke(this.target, args);
		}else{
			System.out.println("对不起，您没有权限");
		}
		return null;
	}

}

使用代理的方法newProxyInstance（）返回薪水管理类（这是目标类）

package cn.edu.proxy.cglibproxy;

import java.lang.reflect.Proxy;

import org.junit.Test;

public class SalaryTest {
	@Test
	public void test(){
		Object target=new SalaryManagerImpl();//目标类
		Logger logger=new Logger();
		Privilege privilege=new Privilege();
		privilege.setAccess("admin");
		Security security=new Security();
		SalaryInterceptor interceptor=new SalaryInterceptor(target, logger, security, privilege);
		 SalaryManager salaryManager=(SalaryManager)Proxy.newProxyInstance(target.getClass().getClassLoader(), target.getClass().getInterfaces(), interceptor);
		salaryManager.showSalary();
	}
}

aop:

1.切面

日志，安全类框架，权限等都是切面

2.通知

切面中的方法就是通知

3.目标类

4.切入点

5.织入

形成代理对象的方法的过程
好处：

日志，安全性框架，权限，目标方法之间完全是松耦合的

Spring框架中的aop

标签：spring aop 代理 javaee

原文地址：http://blog.csdn.net/u014010769/article/details/44877165