log4j2的使用

log4j2.xml

<?xml version="1.0" encoding="UTF-8"?>

<Configuration status="WARN" monitorInterval="300">

       <properties>

             <property name="INFO_HOME">logs/info</property>

             <property name="ERROR_HOME">logs/error</property>

             <property name="FILE_EOOR_NAME">eplan_error</property>

             <property name="FILE_INFO_NAME">eplan_info</property>

       </properties>

       <Appenders>



             <Console name="Console" target="SYSTEM_OUT">

                    <PatternLayout

                           pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - 
%msg%n" />

             </Console>



             <RollingRandomAccessFile name="InfoFile"

                    fileName="${INFO_HOME}/${FILE_INFO_NAME}.log"

                    filePattern="${INFO_HOME}/$${date:yyyy-MM-dd}/info/${FILE_INFO_NAME}-%d{yyyy-MM-dd}-%i.log">

                    <Filters>

                           <ThresholdFilter level="warn" onMatch="DENY"

                                 onMismatch="NEUTRAL" />

                           <ThresholdFilter level="info" onMatch="ACCEPT"

                                 onMismatch="DENY" />

                    </Filters>

                    <PatternLayout

                           pattern="%d{yyyy-MM-dd HH:mm:ss}  %logger{36} - 
%msg%n" />

                    <Policies>

                           <TimeBasedTriggeringPolicy interval="1" />

                           <SizeBasedTriggeringPolicy size="10 MB" />

                    </Policies>

                    <DefaultRolloverStrategy max="3" />

             </RollingRandomAccessFile>



             <RollingRandomAccessFile name="ErrorFile"

                    fileName="${ERROR_HOME}/${FILE_EOOR_NAME}.log"

                    filePattern="${ERROR_HOME}/$${date:yyyy-MM-dd}/error/${FILE_EOOR_NAME}-%d{yyyy-MM-dd}-%i.log">

                    <Filters>

                           <ThresholdFilter level="fatal" onMatch="DENY"

                                 onMismatch="NEUTRAL" />

                           <ThresholdFilter level="error" onMatch="ACCEPT"

                                 onMismatch="DENY" />

                    </Filters>

                    <PatternLayout

                           pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level 
%logger{36} - %msg%n" />

                    <Policies>

                           <TimeBasedTriggeringPolicy interval="1" />

                           <SizeBasedTriggeringPolicy size="10 MB" />

                    </Policies>

                    <DefaultRolloverStrategy max="20" />

             </RollingRandomAccessFile>



       </Appenders>

       <Loggers>

             <Root level="trace">

                    <AppenderRef ref="Console" />

                    <AppenderRef ref="InfoFile" />

                    <AppenderRef ref="ErrorFile" />

             </Root>

       </Loggers>

</Configuration>

TestLog4j2.java

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

/**
* @author ZL
* @date 2020年2月26日 上午10:32:58
* @Description 
*/
public class TestLog4j2 {

     private static final Logger logger = LogManager.getLogger(TestLog4j2.class);
        public static void main(String[] args) {
            try {
                int i = 1/0;
            } catch (Exception e) {
                logger.error("使用 + 号连接直接输出 e ："+e);
                System.out.println("--------------------------------------------");
                logger.error("使用 + 号连接直接输出 e.toString() ："+e.toString());
                System.out.println("--------------------------------------------");
                logger.error("使用 + 号连接直接输出 e.getMessage() ："+e.getMessage());
                System.out.println("--------------------------------------------");
                logger.error("使用 ，号 且第二个参数为Throwable :",e);
                System.out.println("--------------------------------------------");
                logger.error("第二个参数为Throwable,使用分隔符{} :",e);
                System.out.println("--------------------------------------------");
                logger.error("第二个参数为Object,使用分隔符{} :","AAA");
                System.out.println("--------------------------------------------");
            }
        }
}