AOP编程实例：拦截器拦截拦截某个实现类的方法

第一步：配置实现MethodInterceptor的切面

java代码

 1 public class OutsideInvokeLogInterceptor implements MethodInterceptor{  
 2     private static Logger log = Logger.getLogger("outsideInvoke");  
 3     
 4     @Override  
 5     public Object invoke(MethodInvocation invocation) throws Throwable {  
 6         String methodName = invocation.getMethod().toString();  
 7         Object returnValue = invocation.proceed();  
 8         if (returnValue == null) {  
 9             log.warn("调用 " + methodName + "is fail,返回的result结果为空,方法入参为:(" + parseArguments(invocation.getArguments()) + ")");  
10             return ResultDTO.getFailureResult(BSErrorCode.INTERNAL_ERROR, BaseKeyMsgCode.RETURN_RESULTDTO_IS_NULL);  
11         }else{  
12             if(returnValue instanceof ResultDTO){  
13                 ResultDTO<Object> resultDTO = (ResultDTO<Object>)returnValue;  
14                 if(!resultDTO.isSuccess()){  
15                     log.warn("调用 " + methodName + " is fail ,方法入参为:(" + parseArguments(invocation.getArguments()) + ")"  
16                          + "返回值：" +resultDTO.getCode() + "," + resultDTO.getKey());  
17                 } else{  
18                     log.info("调用 " + methodName + " is success ,方法入参为:(" + parseArguments(invocation.getArguments()) + ")");  
19                 }  
20             }  
21         }  
22         return returnValue;  
23   
24     }  
25 }  

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