【spring aop切面】基础使用教程

 

package tpf.aspect;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.*;
import org.springframework.stereotype.Component;

import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;

/**
 * Created by zipon on 2017/9/20.
 */
@Aspect
@Component
public class AspectTest {
    private final static Log logger = LogFactory.getLog(AspectTest.class);

    private String joinPointInfo(JoinPoint joinPoint) {
        return simpleJoinPointInfo(joinPoint) + " args:" + Arrays.toString(joinPoint.getArgs());
    }

    private String simpleJoinPointInfo(JoinPoint joinPoint) {
        return joinPoint.getTarget().getClass() + "#" + joinPoint.getSignature().getName();
    }

    //定义切点
    @Pointcut("execution(* tpf.controller.loginController.* (..))")
    public void cutPublicMethod() {
    }

    @Before("cutPublicMethod()")
    public void logBefore(JoinPoint pjp) throws Throwable {
    }

    @AfterReturning("cutPublicMethod()")
    public void logAfter(JoinPoint pjp) throws Throwable {
    }

    @Around("cutPublicMethod()")
    public Object consumingAround(ProceedingJoinPoint joinPoint) throws Throwable {
        System.out.println("**************登陆开始**************");
        String joinPointInfo = joinPointInfo(joinPoint);
        String simpleJoinPointInfo = simpleJoinPointInfo(joinPoint);
        long startTime = System.currentTimeMillis();
        logger.info("[API_START]" + joinPointInfo);
        Object[] args = joinPoint.getArgs();
        Object obj = joinPoint.proceed(args);
        // logger.info("[API_END]" + simpleJoinPointInfo);
        long endTime = System.currentTimeMillis();
        long diffTime = endTime - startTime;
        Map<String, String> map = new HashMap<String, String>();
        map.put("method", simpleJoinPointInfo);
        map.put("time", String.valueOf(diffTime));
        map.put("start", String.valueOf(startTime));
        map.put("end", String.valueOf(endTime));

        //方法执行完，要用joinPoint.proceed();
        joinPoint.proceed();
        System.out.println("==================登陆结束后==================");
        return obj;
    }

}