Spring AOP优化(log4j优化)

xml添加配置

在中添加配置:

advice类书写

这个方法会在配置的类切面执行
invocation.getMethod().拿到的那个方法就是连接点

package com.gavin.exam.advice;

import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
import org.apache.log4j.Logger;

import com.gavin.exam.service.impl.UserServiceImpl;

public class LogMethodTimeAdvice implements MethodInterceptor {

    private final Logger logger = Logger.getLogger(UserServiceImpl.class);

    @Override
    public Object invoke(MethodInvocation invocation) throws Throwable {
        long startTime = System.currentTimeMillis();

        Object returnValue = invocation.proceed();  //方法执行
        String methodName = invocation.getMethod().getName();
        long endTime = System.currentTimeMillis();

        StringBuilder sb = new StringBuilder();
        sb.append(invocation.getMethod().getDeclaringClass().getSimpleName());
        sb.append(":");
        sb.append(methodName);
        sb.append(" time:");
        sb.append(endTime - startTime);

        logger.info(sb.toString());
        return returnValue;
    }
}