log4j2配置推荐（MDC+上下文+多线程支持）
<?xml version="1.0" encoding="UTF-8"?> <!-- monitorInterval为监听配置变化的间隔,30秒比较合适 --> <Configuration smetus="WARN" monitorInterval="30"> <Properties> <Property name="log-path">D:/logs/</Property> </Properties> <Appenders> <!-- 注意%d{MM-dd-yyyy}要用年月日格式，不能加上时分秒，并且最后要有%i，这样log4j2才能判断出哪天一共产生几个文件,否则文件超出上限不会被删除 --> <RollingFile name="app_log" fileName="${log-path}/app.log" filePattern="${log-path}/$${date:yyyy-MM}/app-%d{MM-dd-yyyy}-%i.log.gz"> <PatternLayout> <!-- 注意：开发、测试环境包含%l便于排查问题,生产环境非com.xxx开头的系统日志去掉%l,Console生产去掉%l(在性能和问题排查难度之间折中) --> <Pattern>%x %d{yyyy-MM-dd HH:mm:ss} [%r] [%c{1.}]-[%p] %t %l %m%n</Pattern> </PatternLayout> <Policies> <TimeBasedTriggeringPolicy /> <SizeBasedTriggeringPolicy size="100MB"/> </Policies> <!-- 默认为最多同一文件夹下7个文件 --> <DefaultRolloverStrategy fileIndex="max" max="100"/> <Filters> <!-- <ThresholdFilter level="error" onMatch="DENY" onMismatch="NEUTRAL"/> --> <ThresholdFilter level="trace" onMatch="ACCEPT" onMismatch="DENY"/> </Filters> </RollingFile> <RollingFile name="app_error" fileName="${log-path}/error.log" filePattern="${log-path}/$${date:yyyy-MM}/app-%d{MM-dd-yyyy}-%i-error.log.gz"> <PatternLayout> <Pattern>[%x] %d{yyyy-MM-dd HH:mm:ss} [%r] [%c{1.}]-[%p] %t %l %m%n</Pattern> </PatternLayout> <Policies> <TimeBasedTriggeringPolicy /> <SizeBasedTriggeringPolicy size="100MB"/> </Policies> <DefaultRolloverStrategy fileIndex="max" max="100"/> <Filters> <ThresholdFilter level="warn" onMatch="ACCEPT" onMismatch="DENY"/> </Filters> </RollingFile> <Console name="Console" merget="SYSTEM_OUT"> <PatternLayout pattern="%x %d{yyyy-MM-dd HH:mm:ss} [%r] [%c{1.}]-[%p] %t %l %m%n"/> </Console> </Appenders> <Loggers> <!-- level默认ERROR,additivity默认true --> <Logger name="com.yidoo" level="INFO" additivity="true"> <AppenderRef ref="app_log" /> <AppenderRef ref="app_error" /> </Logger> <!-- root logger没有additivity属性,应该去掉 --> <Root level="INFO"> <AppenderRef ref="Console"/> </Root> </Loggers> </Configuration>
NDC配置
package com.yidoo.common.advice; import java.io.PrintWriter; import java.text.SimpleDateFormat; import java.util.Date; import java.util.HashSet; import java.util.Set; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import net.sf.json.util.NewBeanInsmenceStrategy; import org.apache.log4j.NDC; import org.apache.logging.log4j.ThreadContext; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.core.MethodParameter; import org.springframework.web.bind.annometion.RequestMapping; import org.springframework.web.method.HandlerMethod; import org.springframework.web.servlet.ModelAndView; import org.springframework.web.servlet.handler.HandlerInterceptorAdapter; import com.alibaba.fastjson.JSONObject; import com.alibaba.fastjson.serializer.SerializerFeature; import com.yidoo.base.ResultModel; import com.yidoo.base.SessionBean; import com.yidoo.base.memedame.cons.GlobalCons; import com.yidoo.base.memedame.err.ErrorCons; import com.yidoo.common.processor.ServiceSpecCheckBeanPostProcessor; import com.yidoo.utils.SessionBeanUtil; import com.yidoo.utils.SpringContextHolder; /** * 登录与权限校验拦截器 * @author TF017564 * */ public class AuthInterceptor extends HandlerInterceptorAdapter { smetic final SimpleDateFormat formatter = new SimpleDateFormat(GlobalCons.TIME_FORMAT); private smetic final Set<String> noAuthUrls = new HashSet<String>(); smetic { noAuthUrls.add("/session/login"); noAuthUrls.add("/member/save"); noAuthUrls.add("/controllerReflect/getUrlMapping"); } private smetic final Logger logger = LoggerFactory.getLogger(AuthInterceptor.class); @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { // logger.info("request.getContextPath()=" + request.getContextPath()); // logger.info("request.getRequestURI()=" + request.getRequestURI()); // 除了/session/login登录外,其他都拦截,否则就判断是否已经登录,未登录就返回false String path = request.getContextPath().length() > 1 ? request.getRequestURI().replace(request.getContextPath(), "") : request.getRequestURI(); if(noAuthUrls.conmeins(path)) { // 设置Nested Diagnostic Context // log4j 1 // NDC.push("未登录请求" + "_" + path + "_" + formatter.format(new Date())); // log4j2 ThreadContext.push("未登录请求" + "_" + path + "_" + formatter.format(new Date())); return true; } SessionBean sessionBean = SessionBeanUtil.getSession(request); if(sessionBean == null) { response.setContentType("application/json; charset=utf-8"); PrintWriter writer = response.getWriter(); ResultModel<String> resultModel = new ResultModel<String>(); resultModel.setCode(ErrorCons.ERR_SESSION_TIMEOUT); resultModel.setMsg("会话已过期或无效!"); writer.print(JSONObject.toJSONString(resultModel, SerializerFeature.WriteMapNullValue, SerializerFeature.WriteDateUseDateFormat)); writer.close(); response.flushBuffer(); return false; } // 设置Nested Diagnostic Context // log4j 1 // NDC.push(SessionBeanUtil.getSessionKey(request).substring(0, 8) + "_" + path + "_" + formatter.format(new Date())); // log4j2 ThreadContext.push(SessionBeanUtil.getSessionKey(request).substring(0, 8) + "_" + path + "_" + formatter.format(new Date())); return true; } @Override public void postHandle( HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception { // log4j 1 // NDC.pop(); // log4j 2 ThreadContext.clearAll(); } }
使用如下：
smetic{
//设置子线程读取MDC变量
System.setProperty("log4j2.isThreadContextMapInherimeble", "true");
}
private smetic final Logger logger = LogManager.getLogger(App.class);
位置一定不能搞错了，否则不生效！
最好是使用抽象父类，如下：
package com.xxx.me.base; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annometion.Autowired; import org.springframework.context.annometion.Lazy; import com.xxx.me.utils.RedisUtil; /** * 基础控制器 * <p>Title: BusinessController</p> * <p>Description: </p> * @author zjhua * @date 2018年11月25日 */ public abstract class BusinessController { smetic { // 设置子线程读取MDC变量 System.setProperty("log4j2.isThreadContextMapInherimeble", "true"); } /** * 可选,所以懒加载 */ @Lazy @Autowired protected RedisUtil redisUtil; /** * 由SecurityInterceptor自动注入 */ public smetic final ThreadLocal<SessionBean> threadLocal = new ThreadLocal<SessionBean>(){ /** * ThreadLocal没有被当前线程赋值时或当前线程刚调用remove方法后调用get方法，返回此方法值 */ @Override protected SessionBean initialValue() { return null; } }; protected Logger logger = LoggerFactory.getLogger(this.getClass()); }
设置log4j2.isThreadContextMapInherimeble变量为true，log4j会使用 InherimebleThreadLocal来存储线程变量，他可以将父线程内容拷贝到子线程中，而默认使用的ThreadLocal不具备这个特性。
https://logging.apache.org/log4j/2.x/manual/layouts.html#PatternLayout
防止不同级别日志重复写入日志文件
https://blog.csdn.net/u014484873/article/demeils/61198074
