Java 基于log4j的日志工具类
对log4j日志类进行了简单封装，使用该封装类的优势在于以下两点：
1、不必在每个类中去创建对象，直接类名 + 方法即可
2、可以很方便的打印出堆栈信息
package com.tradeplatform.receiveorder.util; import java.io.PrintWriter; import java.io.StringWriter; import org.apache.log4j.Logger; /** * @Description 日志记录类 * @author panteng * @version V0.0.1 * @date 2016-09-08 */ public class SysLog { public static Logger log = Logger.getLogger(SysLog.class); /** * 打印警告 * * @param obj */ public static void warn(Object obj) { try{ /*** 获取输出信息的代码的位置 ***/ String location = ""; StackTraceElement[] stacks = Thread.currentThread().getStackTrace(); location = stacks[2].getClassName() + "." + stacks[2].getMethodName() + "(" + stacks[2].getLineNumber() + ")"; /*** 是否是异常 ***/ if (obj instanceof Exception) { Exception e = (Exception) obj; StringWriter sw = new StringWriter(); e.printStackTrace(new PrintWriter(sw, true)); String str = sw.toString(); log.warn(location + str); } else { log.warn(location + obj.toString()); } }catch (Exception e) { // TODO: handle exception e.printStackTrace(); } } /** * 打印信息 * * @param obj */ public static void info(Object obj) { try{ /*** 获取输出信息的代码的位置 ***/ String location = ""; StackTraceElement[] stacks = Thread.currentThread().getStackTrace(); location = stacks[2].getClassName() + "." + stacks[2].getMethodName() + "(" + stacks[2].getLineNumber() + ")"; /*** 是否是异常 ***/ if (obj instanceof Exception) { Exception e = (Exception) obj; StringWriter sw = new StringWriter(); e.printStackTrace(new PrintWriter(sw, true)); String str = sw.toString(); log.info(location + str); } else { log.info(location + obj.toString()); } }catch (Exception e) { // TODO: handle exception e.printStackTrace(); } } /** * 打印错误 * * @param obj */ public static void error(Object obj) { try{ /*** 获取输出信息的代码的位置 ***/ String location = ""; StackTraceElement[] stacks = Thread.currentThread().getStackTrace(); location = stacks[2].getClassName() + "." + stacks[2].getMethodName() + "(" + stacks[2].getLineNumber() + ")"; /*** 是否是异常 ***/ if (obj instanceof Exception) { Exception e = (Exception) obj; StringWriter sw = new StringWriter(); e.printStackTrace(new PrintWriter(sw, true)); String str = sw.toString(); log.error(location + str); } else { log.error(location + obj.toString()); } }catch (Exception e) { // TODO: handle exception e.printStackTrace(); } } /** * 向数据库告警表中插入信息 * @param obj */ public static void dbWarn(Object obj) { try{ String printInfo = ""; /*** 获取输出信息的代码的位置 ***/ String location = ""; StackTraceElement[] stacks = Thread.currentThread().getStackTrace(); location = stacks[2].getClassName() + "." + stacks[2].getMethodName() + "(" + stacks[2].getLineNumber() + ")"; /*** 是否是异常 ***/ if (obj instanceof Exception) { Exception e = (Exception) obj; printInfo = location + e.getMessage(); log.fatal(printInfo.substring(0, printInfo.length() > 512?512:printInfo.length())); } else { printInfo = location + obj.toString(); log.fatal(printInfo.substring(0, printInfo.length() > 512?512:printInfo.length())); } }catch (Exception e) { // TODO: handle exception e.printStackTrace(); } } /** * 获取调用此函数的代码的位置 * @return 包名.类名.方法名(行数) */ public static String getCodeLocation(){ try{ /*** 获取输出信息的代码的位置 ***/ String location = ""; StackTraceElement[] stacks = Thread.currentThread().getStackTrace(); location = stacks[2].getClassName() + "." + stacks[2].getMethodName() + "(" + stacks[2].getLineNumber() + ")"; return location; }catch (Exception e) { // TODO: handle exception SysLog.error(e); return ""; } } }
配置文件：
base.logs.dir=D:/testMycatLog log4j.rootLogger = DEBUG, INFO, all_log, stdout ,DB log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.layout=org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss SSS} %-5p [%-15x] [%t] - %m%n log4j.appender.all_log=org.apache.log4j.DailyRollingFileAppender log4j.appender.all_log.DatePattern='.'yyyy-MM-dd-HH log4j.appender.all_log.File=${base.logs.dir}/all_log.log log4j.appender.all_log.layout=org.apache.log4j.PatternLayout log4j.appender.all_log.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss SSS} %-5p [%-15x] [%t] - %m%n log4j.appender.DB = org.apache.log4j.jdbc.JDBCAppender log4j.appender.DB.BufferSize=1 log4j.appender.DB.driver=com.mysql.jdbc.Driver log4j.appender.DB.URL=jdbc:mysql://192.168.91.231:8066/CTPDB log4j.appender.DB.user=ctp log4j.appender.DB.password=ctp log4j.appender.DB.Threshold =FATAL log4j.appender.DB.layout = org.apache.log4j.PatternLayout log4j.appender.DB.sql=insert into syswarn(WARN_LEVEL,WARN_INFO) values("1",'%m'); #--------------kafka配置----------------# log4j.appender.kafkaAppender=org.apache.log4j.DailyRollingFileAppender log4j.appender.kafkaAppender.DatePattern='.'yyyy-MM-dd-HH log4j.appender.kafkaAppender.File=${base.logs.dir}/server.log log4j.appender.kafkaAppender.layout=org.apache.log4j.PatternLayout log4j.appender.kafkaAppender.layout.ConversionPattern=[%d] %p %m (%c)%n log4j.appender.stateChangeAppender=org.apache.log4j.DailyRollingFileAppender log4j.appender.stateChangeAppender.DatePattern='.'yyyy-MM-dd-HH log4j.appender.stateChangeAppender.File=${base.logs.dir}/state-change.log log4j.appender.stateChangeAppender.layout=org.apache.log4j.PatternLayout log4j.appender.stateChangeAppender.layout.ConversionPattern=[%d] %p %m (%c)%n log4j.appender.requestAppender=org.apache.log4j.DailyRollingFileAppender log4j.appender.requestAppender.DatePattern='.'yyyy-MM-dd-HH log4j.appender.requestAppender.File=${base.logs.dir}/kafka-request.log log4j.appender.requestAppender.layout=org.apache.log4j.PatternLayout log4j.appender.requestAppender.layout.ConversionPattern=[%d] %p %m (%c)%n log4j.appender.cleanerAppender=org.apache.log4j.DailyRollingFileAppender log4j.appender.cleanerAppender.DatePattern='.'yyyy-MM-dd-HH log4j.appender.cleanerAppender.File=${base.logs.dir}/log-cleaner.log log4j.appender.cleanerAppender.layout=org.apache.log4j.PatternLayout log4j.appender.cleanerAppender.layout.ConversionPattern=[%d] %p %m (%c)%n log4j.appender.controllerAppender=org.apache.log4j.DailyRollingFileAppender log4j.appender.controllerAppender.DatePattern='.'yyyy-MM-dd-HH log4j.appender.controllerAppender.File=${base.logs.dir}/controller.log log4j.appender.controllerAppender.layout=org.apache.log4j.PatternLayout log4j.appender.controllerAppender.layout.ConversionPattern=[%d] %p %m (%c)%n # Turn on all our debugging info #log4j.logger.kafka.producer.async.DefaultEventHandler=DEBUG, kafkaAppender #log4j.logger.kafka.client.ClientUtils=DEBUG, kafkaAppender #log4j.logger.kafka.perf=DEBUG, kafkaAppender #log4j.logger.kafka.perf.ProducerPerformance$ProducerThread=DEBUG, kafkaAppender #log4j.logger.org.I0Itec.zkclient.ZkClient=DEBUG log4j.logger.kafka=INFO, kafkaAppender log4j.logger.kafka.network.RequestChannel$=WARN, requestAppender log4j.additivity.kafka.network.RequestChannel$=false #log4j.logger.kafka.network.Processor=TRACE, requestAppender #log4j.logger.kafka.server.KafkaApis=TRACE, requestAppender #log4j.additivity.kafka.server.KafkaApis=false log4j.logger.kafka.request.logger=WARN, requestAppender log4j.additivity.kafka.request.logger=false log4j.logger.kafka.controller=TRACE, controllerAppender log4j.additivity.kafka.controller=false log4j.logger.kafka.log.LogCleaner=INFO, cleanerAppender log4j.additivity.kafka.log.LogCleaner=false log4j.logger.kafka.log.Cleaner=INFO, cleanerAppender log4j.additivity.kafka.log.Cleaner=false log4j.logger.state.change.logger=TRACE, stateChangeAppender log4j.additivity.state.change.logger=false #---------------------------------------#
