spring注解实现AOP

发布时间：2020-12-15 01:51:12 所属栏目：大数据来源：网络整理

导读：项目结构图注意事项： ? 如果要使用AspectJ完成注解切面需要注意下面的JDK与AspectJ的匹配： ? encoding= ?> = = = = http: http: http: aop:aspectj-autoproxy/aop:aspectj-autoproxy bean id=span style="color: #800000"gt;"/spanspan style="color: #80

项目结构图

注意事项：

　　如果要使用AspectJ完成注解切面需要注意下面的JDK与AspectJ的匹配：

encoding=?> ==== http: http: http:

<aop:aspectj-autoproxy></aop:aspectj-autoproxy>  

<bean id=<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;userManager</span><span style="color: #800000"&gt;"</span> <span style="color: #0000ff"&gt;class</span>=<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;com.tgb.spring.UserManagerImpl</span><span style="color: #800000"&gt;"</span>></bean>  

<bean id=<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;aspectJAdvice</span><span style="color: #800000"&gt;"</span> <span style="color: #0000ff"&gt;class</span>=<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;com.tgb.spring.AspectJAdvice</span><span style="color: #800000"&gt;"</span>></bean>

2.UserManager的接口实现

public interface UserManager {

</span><span style="color: #0000ff"&gt;public</span> <span style="color: #0000ff"&gt;abstract</span> <span style="color: #0000ff"&gt;void</span><span style="color: #000000"&gt; addUser(String userName,String password);  

</span><span style="color: #0000ff"&gt;public</span> <span style="color: #0000ff"&gt;abstract</span> <span style="color: #0000ff"&gt;void</span> delUser(<span style="color: #0000ff"&gt;int</span><span style="color: #000000"&gt; userId);  

</span><span style="color: #0000ff"&gt;public</span> <span style="color: #0000ff"&gt;abstract</span> String findUserById(<span style="color: #0000ff"&gt;int</span><span style="color: #000000"&gt; userId);  

</span><span style="color: #0000ff"&gt;public</span> <span style="color: #0000ff"&gt;abstract</span> <span style="color: #0000ff"&gt;void</span> modifyUser(<span style="color: #0000ff"&gt;int</span><span style="color: #000000"&gt; userId,String userName,String password);

}

3.继承UserManager接口实现UserManagerImpl

public class UserManagerImpl implements UserManager {

@Override
</span><span style="color: #0000ff"&gt;public</span>  <span style="color: #0000ff"&gt;void</span><span style="color: #000000"&gt; addUser(String userName,String password) {
    </span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt; TODO Auto-generated method stub</span>
     System.<span style="color: #0000ff"&gt;out</span>.println(<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;----tianjia.delUser()----</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);         
}
@Override
</span><span style="color: #0000ff"&gt;public</span>  <span style="color: #0000ff"&gt;void</span> delUser(<span style="color: #0000ff"&gt;int</span><span style="color: #000000"&gt; userId) {
    </span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt; TODO Auto-generated method stub</span>
     System.<span style="color: #0000ff"&gt;out</span>.println(<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;----shanchu.delUser()----</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);  
} 
@Override
</span><span style="color: #0000ff"&gt;public</span>  String findUserById(<span style="color: #0000ff"&gt;int</span><span style="color: #000000"&gt; userId) {  

    System.</span><span style="color: #0000ff"&gt;out</span>.println(<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;----UserManagerImpl.findUserById()----</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);  

    </span><span style="color: #0000ff"&gt;if</span>(userId <= <span style="color: #800080"&gt;0</span><span style="color: #000000"&gt;){  
        </span><span style="color: #0000ff"&gt;throw</span> <span style="color: #0000ff"&gt;new</span> IllegalArgumentException(<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;该用户不存在</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);  
    }  
    </span><span style="color: #0000ff"&gt;return</span> <span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;jiuqiyuliang</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;;  
} 
@Override
</span><span style="color: #0000ff"&gt;public</span> <span style="color: #0000ff"&gt;void</span> modifyUser(<span style="color: #0000ff"&gt;int</span><span style="color: #000000"&gt; userId,String password) {
    </span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt; TODO Auto-generated method stub</span>
     System.<span style="color: #0000ff"&gt;out</span>.println(<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;----xiugai.delUser()----</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);  
}

}

4.切面实现

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;

@Aspect
public class AspectJAdvice {

</span><span style="color: #008000"&gt;/*</span><span style="color: #008000"&gt;* 
 * Pointcut 
 * 定义Pointcut，Pointcut的名称为aspectjMethod()，此方法没有返回值和参数 
 * 该方法就是一个标识，不进行调用 
 </span><span style="color: #008000"&gt;*/</span><span style="color: #000000"&gt;  
@Pointcut(</span><span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;execution(* find*(..))</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;)  
</span><span style="color: #0000ff"&gt;private</span> <span style="color: #0000ff"&gt;void</span><span style="color: #000000"&gt; aspectjMethod(){};  

</span><span style="color: #008000"&gt;/*</span><span style="color: #008000"&gt;*  
 * Before 
 * 在核心业务执行前执行，不能阻止核心业务的调用。 
 * @param joinPoint  
 </span><span style="color: #008000"&gt;*/</span><span style="color: #000000"&gt;    
@Before(</span><span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;aspectjMethod()</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;)    
</span><span style="color: #0000ff"&gt;public</span> <span style="color: #0000ff"&gt;void</span><span style="color: #000000"&gt; doBefore(JoinPoint joinPoint) {    
    System.</span><span style="color: #0000ff"&gt;out</span>.println(<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;-----doBefore.invoke-----</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);  
    System.</span><span style="color: #0000ff"&gt;out</span>.println(<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt; 此处意在执行核心业务逻辑前，做一些安全性的判断等等</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);  
    System.</span><span style="color: #0000ff"&gt;out</span>.println(<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt; 可通过joinPoint来获取所需要的内容</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);  
    System.</span><span style="color: #0000ff"&gt;out</span>.println(<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;-----End of doBefore()------</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);  
}  



</span><span style="color: #008000"&gt;/*</span><span style="color: #008000"&gt;*  
 * Around  
 * 手动控制调用核心业务逻辑，以及调用前和调用后的处理,*  
 * 注意：当核心业务抛异常后，立即退出，转向AfterAdvice 
 * 执行完AfterAdvice，再转到ThrowingAdvice 
 * @param pjp 
 * @return 
 * @throws Throwable 
 </span><span style="color: #008000"&gt;*/</span><span style="color: #000000"&gt;   
@Around(value </span>= <span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;aspectjMethod()</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;)    
</span><span style="color: #0000ff"&gt;public</span><span style="color: #000000"&gt; Object doAround(ProceedingJoinPoint pjp) throws Throwable {    
    System.</span><span style="color: #0000ff"&gt;out</span>.println(<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;-----doAround.invoke-----</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);  
    System.</span><span style="color: #0000ff"&gt;out</span>.println(<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt; 此处可以做类似于Before的事情</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);  

    </span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt;调用核心逻辑  </span>
    Object retVal =<span style="color: #000000"&gt; pjp.proceed();  
    System.</span><span style="color: #0000ff"&gt;out</span>.println(<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt; 此处可以做类似于After的事情</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);  
    System.</span><span style="color: #0000ff"&gt;out</span>.println(<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;-----End of doAround()------</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);  
    </span><span style="color: #0000ff"&gt;return</span><span style="color: #000000"&gt; retVal;  
}    


</span><span style="color: #008000"&gt;/*</span><span style="color: #008000"&gt;*  
 * After  
 * 核心业务逻辑退出后（包括正常执行结束和异常退出），执行此Advice 
 * @param joinPoint 
 </span><span style="color: #008000"&gt;*/</span><span style="color: #000000"&gt;  
@After(value </span>= <span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;aspectjMethod()</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;)    
</span><span style="color: #0000ff"&gt;public</span> <span style="color: #0000ff"&gt;void</span><span style="color: #000000"&gt; doAfter(JoinPoint joinPoint) {    
    System.</span><span style="color: #0000ff"&gt;out</span>.println(<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;-----doAfter.invoke-----</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);  
    System.</span><span style="color: #0000ff"&gt;out</span>.println(<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt; 此处意在执行核心业务逻辑之后，做一些日志记录操作等等</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);  
    System.</span><span style="color: #0000ff"&gt;out</span>.println(<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt; 可通过joinPoint来获取所需要的内容</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);  
    System.</span><span style="color: #0000ff"&gt;out</span>.println(<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;-----End of doAfter()------</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);  
}    

</span><span style="color: #008000"&gt;/*</span><span style="color: #008000"&gt;*  
 * AfterReturning  
 * 核心业务逻辑调用正常退出后，不管是否有返回值，正常退出后，均执行此Advice 
 * @param joinPoint 
 </span><span style="color: #008000"&gt;*/</span><span style="color: #000000"&gt;   
@AfterReturning(value </span>= <span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;aspectjMethod()</span><span style="color: #800000"&gt;"</span>,returning = <span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;retVal</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;)    
</span><span style="color: #0000ff"&gt;public</span> <span style="color: #0000ff"&gt;void</span><span style="color: #000000"&gt; doReturn(JoinPoint joinPoint,String retVal) {    
    System.</span><span style="color: #0000ff"&gt;out</span>.println(<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;-----doReturn().invoke-----</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);  
    System.</span><span style="color: #0000ff"&gt;out</span>.println(<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;Return Value: </span><span style="color: #800000"&gt;"</span> +<span style="color: #000000"&gt; retVal);   
    System.</span><span style="color: #0000ff"&gt;out</span>.println(<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt; 此处可以对返回值做进一步处理</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);  
    System.</span><span style="color: #0000ff"&gt;out</span>.println(<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt; 可通过joinPoint来获取所需要的内容</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);  
    System.</span><span style="color: #0000ff"&gt;out</span>.println(<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;-----End of doReturn()------</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);  
}  

</span><span style="color: #008000"&gt;/*</span><span style="color: #008000"&gt;* 
 * 核心业务逻辑调用异常退出后，执行此Advice，处理错误信息 
 *  
 * 注意：执行顺序在Around Advice之后 
 * @param joinPoint 
 * @param ex 
 </span><span style="color: #008000"&gt;*/</span><span style="color: #000000"&gt;  
@AfterThrowing(value </span>= <span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;aspectjMethod()</span><span style="color: #800000"&gt;"</span>,throwing = <span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;ex</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;)    
</span><span style="color: #0000ff"&gt;public</span> <span style="color: #0000ff"&gt;void</span><span style="color: #000000"&gt; doThrowing(JoinPoint joinPoint,Exception ex) {    
    System.</span><span style="color: #0000ff"&gt;out</span>.println(<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;-----doThrowing().invoke-----</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);  
    System.</span><span style="color: #0000ff"&gt;out</span>.println(<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt; 错误信息：</span><span style="color: #800000"&gt;"</span>+<span style="color: #000000"&gt;ex.getMessage());  
    System.</span><span style="color: #0000ff"&gt;out</span>.println(<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt; 此处意在执行核心业务逻辑出错时，捕获异常，并可做一些日志记录操作等等</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);  
    System.</span><span style="color: #0000ff"&gt;out</span>.println(<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt; 可通过joinPoint来获取所需要的内容</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);  
    System.</span><span style="color: #0000ff"&gt;out</span>.println(<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;-----End of doThrowing()------</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);    
}

}

5.Client端实现

import com.tgb.spring.UserManager;
import com.tgb.spring.UserManagerImpl;
public class Client {

</span><span style="color: #0000ff"&gt;public</span> <span style="color: #0000ff"&gt;static</span> <span style="color: #0000ff"&gt;void</span><span style="color: #000000"&gt; main(String[] args) {  
    BeanFactory factory </span>= <span style="color: #0000ff"&gt;new</span> ClassPathXmlApplicationContext(<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;applicationContext.xml</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);  

    UserManager userManager </span>= (UserManager) factory.getBean(<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;userManager</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);  
    </span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt;可以查找张三  </span>
    userManager.findUserById(<span style="color: #800080"&gt;1</span><span style="color: #000000"&gt;);  

    System.</span><span style="color: #0000ff"&gt;out</span>.println(<span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;=====我==是==分==割==线=====</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);  

    </span><span style="color: #0000ff"&gt;try</span><span style="color: #000000"&gt; {  
        </span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt; 查不到数据，会抛异常，异常会被AfterThrowingAdvice捕获  </span>
        userManager.findUserById(<span style="color: #800080"&gt;0</span><span style="color: #000000"&gt;);  
    } </span><span style="color: #0000ff"&gt;catch</span><span style="color: #000000"&gt; (IllegalArgumentException e) {  
    }  
}

}

（编辑：李大同）

【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!