编写aop:around时出现的异常org.springframework.aop.AopInvocationException:

 Exception in thread "main"org.springframework.aop.AopInvocationException: Null return value from advice does not match primitive return type for: public boolean org.spring.aop.User.login(java.lang.String,java.lang.String)
at org.springframework.aop.framework.CglibAopProxy.processReturnType(CglibAopProxy.java:351)
at org.springframework.aop.framework.CglibAopProxy.access$000(CglibAopProxy.java:83)
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:646)
at org.spring.aop.User$$EnhancerBySpringCGLIB$$db4a87bb.login(<generated>)

at lee.UserApp.main(UserApp.java:14)

在编写aop代码时，出现了上述的异常。我使用的是around类型的通知方法：我的aop代码如下：

<span style="font-size:18px;">package org.spring.aop;import org.aspectj.lang.ProceedingJoinPoint;public class LoginService {public void enter(String account,String password){System.out.println("some one ....");System.out.println("账号："+account);System.out.println("密码："+password);}public <span style="color:#ff0000;">void</span> leave(ProceedingJoinPoint joinpoint,String account,String password) throws Throwable{System.out.println("-------------------调用通知之前，around-------------");Object obj = joinpoint.proceed();System.out.println("------------------调用通知之后，around--------------");System.out.println("Is s ucceeded?" + obj);obj=false;//return obj;}}</span>

<pre code_snippet_id="260288" snippet_file_name="blog_20140327_3_2103398" name="code" class="java"><span style="font-size:18px;">public <span style="color:#ff0000;">boolean</span> login(String account,String password){System.out.println("--------login-------------");return this.account.equals(account)&&this.password.equals(password);}</span>

出错的原因是因为：org.springframework.aop.AopInvocationException: Null return value from advice does not match primitive return type for: public boolean org.spring.aop.User.login(java.lang.String,java.lang.String)

即：在调用around的时候，原方法的返回值(也就是你要织入的方法)与通知的返回值不一致。

从代码中看出：我是void 没有返回值，而我的login的方法是由返回值的！

所以修改方法是：aop代码中leave方法的返回值类型改为与织入方法返回值一样的类型。

我上面的代码修改方法是：把void 改为 Object。