spring中AOP 注解开发示例详解

<dependency>
 <groupId>org.aspectj</groupId>
 <artifactId>aspectjrt</artifactId>
 <version>1.6.11</version>
</dependency>
<dependency>
 <groupId>org.aspectj</groupId>
 <artifactId>aspectjweaver</artifactId>
 <version>1.6.11</version>
</dependency>

package com.ganji.demo.service.aspect;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.*;
import org.springframework.stereotype.Service;
/**
 * Created by admin on 2015/9/2.
 */
@Aspect
@Service
public class XmlAopDemoUserLog {
// 配置切点 及要传的参数 
 @Pointcut("execution(* com.ganji.demo.service.user.UserService.GetDemoUser(..)) && args(id)")
 public void pointCut(int id)
 {
 }
// 配置连接点 方法开始执行时通知
 @Before("pointCut(id)")
 public void beforeLog(int id) {
  System.out.println("开始执行前置通知 日志记录:"+id);
 }
// 方法执行完后通知
 @After("pointCut(id)")
 public void afterLog(int id) {
  System.out.println("开始执行后置通知 日志记录:"+id);
 }
// 执行成功后通知
 @AfterReturning("pointCut(id)")
 public void afterReturningLog(int id) {
  System.out.println("方法成功执行后通知 日志记录:"+id);
 }
// 抛出异常后通知
 @AfterThrowing("pointCut(id)")
 public void afterThrowingLog(int id) {
  System.out.println("方法抛出异常后执行通知 日志记录"+id);
 }
// 环绕通知
 @Around("pointCut(id)")
 public Object aroundLog(ProceedingJoinPoint joinpoint,int id) {
  Object result = null;
  try {
   System.out.println("环绕通知开始 日志记录"+id);
   long start = System.currentTimeMillis();
   //有返回参数 则需返回值
   result = joinpoint.proceed();
   long end = System.currentTimeMillis();
   System.out.println("总共执行时长" + (end - start) + " 毫秒");
   System.out.println("环绕通知结束 日志记录");
  } catch (Throwable t) {
   System.out.println("出现错误");
  }
  return result;
 }
}

@Aspect
@Component
public class WebLogAspect {
 private Logger logger = Logger.getLogger(getClass());
 ThreadLocal<Long> startTime = new ThreadLocal<>();
 @Pointcut("execution(public * com.juzi.web..*.*(..))")
 public void webLog(){}
 @Before("webLog()")
 public void doBefore(JoinPoint joinPoint) throws Throwable {
  startTime.set(System.currentTimeMillis());
  // 省略日志记录内容
 }
 @AfterReturning(returning = "ret", pointcut = "webLog()")
 public void doAfterReturning(Object ret) throws Throwable {
  // 处理完请求，返回内容
  logger.info("RESPONSE : " + ret);
  logger.info("SPEND TIME : " + (System.currentTimeMillis() - startTime.get()));
 }
}