AOP应用之日志

最新推荐文章于 2024-05-01 21:15:39 发布

原创最新推荐文章于 2024-05-01 21:15:39 发布 · 315 阅读

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#java #aop #log4j

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博客介绍了Java中AOP的实现方式，主要包括声明式方式，涉及切面和切入配置，以及注解方式，为Java开发中使用AOP提供了相关思路。

一、声明式方式
切面

package com.abc.aop;

import com.alibaba.fastjson.JSONObject;
import org.apache.log4j.Logger;
import org.aspectj.lang.JoinPoint;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;
import java.util.Arrays;
import java.util.Enumeration;

public class WebLogAspect {
    private Logger logger = Logger.getLogger(WebLogAspect.class);
    private ThreadLocal sessionId = new ThreadLocal<String>();
    public void doBefore(JoinPoint joinPoint) {
        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        if (attributes != null) {
            HttpServletRequest request = attributes.getRequest();
            if ("application/json".equals(request.getContentType())) {
                sessionId.set(request.getSession().getId());
                logger.info("\n>>[    SessionId]" + sessionId.get() +
                            "\n>>[   RemoteAddr]" + request.getRemoteAddr() +
                            "\n>>[   RequestURL]" + request.getRequestURL().toString() +
                            "\n>>[ Content-type]" + request.getContentType() +
                            "\n>>[RequestParams]" + Arrays.toString(joinPoint.getArgs()));
            } else {
                sessionId.set(request.getSession().getId());
                JSONObject params = new JSONObject();
                Enumeration keys = request.getParameterNames();
                String key = null;
                while (keys.hasMoreElements()) {
                    key = (String) keys.nextElement();
                    params.put(key, request.getParameter(key));
                }
                logger.info("\n>>[    SessionId]" + sessionId.get() +
                            "\n>>[   RemoteAddr]" + request.getRemoteAddr() +
                            "\n>>[   RequestURL]" + request.getRequestURL().toString() +
                            "\n>>[ Content-type]" + request.getContentType() +
                            "\n>>[RequestParams]" + params.toJSONString());
            }
        }
    }
    public void doAfterReturning(Object resp) {
        logger.info("\n<<[SessionId]" + sessionId.get() +
                    "\n<<[ Response]" + resp);
    }
}

切入配置

	<bean id="logAop" class="com.zhph.lang.WebLogAspect"/>
	<aop:config>
		<aop:pointcut expression="execution(public  * com.zhph.*.webservice..*.*(..))" id="pt"/>
		<aop:aspect id="asp" ref="logAop">
			<aop:before method="doBefore" pointcut-ref="pt" arg-names="joinPoint"/>
			<aop:after-returning method="doAfterReturning" pointcut-ref="pt" arg-names="resp" returning="resp"/>
		</aop:aspect>
	</aop:config>

二、注解方式

package com.abc.aop;
import com.alibaba.fastjson.JSONObject;
import org.apache.log4j.Logger;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import javax.servlet.http.HttpServletRequest;
import java.util.Arrays;
import java.util.Enumeration;
@Aspect
public class WebLogAspect {
    private Logger logger = Logger.getLogger(WebLogAspect.class);
    private ThreadLocal sessionId = new ThreadLocal<String>();
    @Pointcut("execution(public  * com.abc.controller..*.*(..))")
    public void webLog() {
    }
    @Before("webLog()")
    public void doBefore(JoinPoint joinPoint) {
        // 接收到请求，记录请求内容
        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        if (attributes != null) {
            // 记录下请求内容
            HttpServletRequest request = attributes.getRequest();
            if ("application/json".equals(request.getContentType())) {
                sessionId.set(request.getSession().getId());
                logger.info("\n>>[    SessionId]" + sessionId.get() +
                            "\n>>[   RemoteAddr]" + request.getRemoteAddr() +
                            "\n>>[   RequestURL]" + request.getRequestURL().toString() +
                            "\n>>[ Content-type]" + request.getContentType() +
                            "\n>>[RequestParams]" + Arrays.toString(joinPoint.getArgs()));
            } else {
                sessionId.set(request.getSession().getId());
                JSONObject params = new JSONObject();
                Enumeration keys = request.getParameterNames();
                String key = null;
                while (keys.hasMoreElements()) {
                    key = (String) keys.nextElement();
                    params.put(key, request.getParameter(key));
                }
                logger.info("\n>>[    SessionId]" + sessionId.get() +
                            "\n>>[   RemoteAddr]" + request.getRemoteAddr() +
                            "\n>>[   RequestURL]" + request.getRequestURL().toString() +
                            "\n>>[ Content-type]" + request.getContentType() +
                            "\n>>[RequestParams]" + params.toJSONString());
            }
        }
    }   
    @AfterReturning(returning = "resp", pointcut = "webLog()")
    public void doAfterReturning(Object resp) {
        logger.info("\n<<[SessionId]" + sessionId.get() +
                    "\n<<[ Response]" + resp);
    }
}