Spring 中使用@Aspect 控制自定义注解

Spring 中使用@Aspect 控制自定义注解

转载一篇介绍@Aspect

1.定义系统日志注解类

@Target(ElementType.METHOD)

@Retention(RetentionPolicy.RUNTIME)

@Documented

public @interface SysLog {

String value() default "";

}

2.定义切面处理类

package com.kxs.common.aspect;

import com.google.gson.Gson;
import com.kxs.common.annotation.SysLog;
import com.kxs.common.utils.HttpContextUtils;
import com.kxs.common.utils.IPUtils;
import com.kxs.modules.sys.entity.SysLogEntity;
import com.kxs.modules.sys.entity.SysUserEntity;
import com.kxs.modules.sys.service.SysLogService;

import org.apache.shiro.SecurityUtils;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;
import java.lang.reflect.Method;
import java.util.Date;

/**
* 系统日志，切面处理类
*
* @author
* @email
* @date
*/
@Aspect
@Component
public class SysLogAspect {
@Autowired
private SysLogService sysLogService;

@Pointcut("@annotation(com.kxs.common.annotation.SysLog)")//指向自定义注解路径
public void logPointCut() {

}

/**
* 切面记录系统日志
* @param point
* @return
* @throws Throwable
*/
@Around("logPointCut()")//
public Object around(ProceedingJoinPoint point) throws Throwable {
long beginTime = System.currentTimeMillis();
//执行方法
Object result = point.proceed();
//执行时长(毫秒)
long time = System.currentTimeMillis() - beginTime;

//保存日志
saveSysLog(point, time);

return result;
}

//保存日志
private void saveSysLog(ProceedingJoinPoint joinPoint, long time) {
MethodSignature signature = (MethodSignature) joinPoint.getSignature();
Method method = signature.getMethod();

SysLogEntity sysLog = new SysLogEntity();
SysLog syslog = method.getAnnotation(SysLog.class);
if(syslog != null){
//注解上的描述
sysLog.setOperation(syslog.value());
}

//请求的方法名
String className = joinPoint.getTarget().getClass().getName();
String methodName = signature.getName();
sysLog.setMethod(className + "." + methodName + "()");

//请求的参数
Object[] args = joinPoint.getArgs();
try{
String params = new Gson().toJson(args[0]);
sysLog.setParams(params);
}catch (Exception e){

}

//获取request
HttpServletRequest request = HttpContextUtils.getHttpServletRequest();
//设置IP地址
sysLog.setIp(IPUtils.getIpAddr(request));

//用户名
String username = ((SysUserEntity) SecurityUtils.getSubject().getPrincipal()).getUsername();
sysLog.setUsername(username);

sysLog.setTime(time);
sysLog.setCreateDate(new Date());
//保存系统日志
sysLogService.save(sysLog);
}
}