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
#---------------------------------------#