配置Log4j记录日志

一时失言乱红尘 2022-05-16 02:30 246阅读 0赞

**1.编写log4j.xml文件**

<?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE log4j:configuration PUBLIC "-//APACHE//DTD LOG4J 1.2//EN" "log4j.dtd">
    
    
    <log4j:configuration xmlns:log4j='http://jakarta.apache.org/log4j/'>
    	
    	<appender name="LOG.Console" class="org.apache.log4j.ConsoleAppender">
    		<param name="Encoding" value="UTF-8" />
    		<layout class="org.apache.log4j.PatternLayout">
    			<param name="ConversionPattern" value="%d{yyy-MM-dd HH:mm:ss} [%-5p] %c {%F:%L} - %m%n" />
    		</layout>
    		
    		<filter class="org.apache.log4j.varia.LevelRangeFilter">
    			<param name="LevelMin" value="DEBUG" />
    		</filter>
    	</appender>
    	
    	
    	<appender name="LOG.DEBUG" class="org.apache.log4j.RollingFileAppender">
    		
    		<param name="File" value="${webApp.root}/logs/debug.log" />
    		
    		<param name="MaxFileSize" value="10240KB" /> 
    		
    		<param name="MaxBackupIndex" value="10" />	
    		<param name="Encoding" value="UTF-8" />
    		<layout class="org.apache.log4j.PatternLayout">
    			<param name="ConversionPattern" value="%d{yyy-MM-dd HH:mm:ss} [%-5p] %c {%F:%L} - %m%n" />
    		</layout>
    		<filter class="org.apache.log4j.varia.LevelRangeFilter">
    			<param name="LevelMin" value="DEBUG" />
    			<param name="LevelMax" value="DEBUG" />
    		</filter>
    	</appender>
    	
    	<appender name="LOG.INFO" class="org.apache.log4j.RollingFileAppender">
    		<param name="File" value="${webApp.root}/logs/info.log" />
    		<param name="MaxFileSize" value="10240KB" />
    		<param name="MaxBackupIndex" value="10" />
    		<param name="Encoding" value="UTF-8" />
    		<layout class="org.apache.log4j.PatternLayout">
    			<param name="ConversionPattern" value="%d{yyy-MM-dd HH:mm:ss} [%-5p] %c {%F:%L} - %m%n" />
    		</layout>
    		<filter class="org.apache.log4j.varia.LevelRangeFilter">
    			<param name="LevelMin" value="INFO" />
    			<param name="LevelMax" value="INFO" />
    		</filter>
    	</appender>
    	
    	<appender name="LOG.WARN" class="org.apache.log4j.RollingFileAppender">
    		<param name="File" value="${webApp.root}/logs/warn.log" />
    		<param name="Encoding" value="UTF-8" />
    		<param name="MaxFileSize" value="10240KB" />
    		<param name="MaxBackupIndex" value="10" />
    		<layout class="org.apache.log4j.PatternLayout">
    			<param name="ConversionPattern" value="%d{yyy-MM-dd HH:mm:ss} [%-5p] %c {%F:%L} - %m%n" />
    		</layout>
    		<filter class="org.apache.log4j.varia.LevelRangeFilter">
    			<param name="LevelMin" value="WARN" />
    			<param name="LevelMax" value="WARN" />
    		</filter>
    	</appender>
    	
    	<appender name="LOG.ERROR" class="org.apache.log4j.RollingFileAppender">
    		<param name="File" value="${webApp.root}/logs/error.log" />
    		<param name="MaxFileSize" value="10240KB" />
    		<param name="MaxBackupIndex" value="10" />
    		<param name="Encoding" value="UTF-8" />
    		<layout class="org.apache.log4j.PatternLayout">
    			<param name="ConversionPattern" value="%d{yyy-MM-dd HH:mm:ss} [%-5p] %c {%F:%L} - %m%n" />
    		</layout>
    		<filter class="org.apache.log4j.varia.LevelRangeFilter">
    			<param name="LevelMin" value="ERROR" />
    			<param name="LevelMax" value="ERROR" />
    		</filter>
    	</appender>
    	
    	<appender name="LOG.FATAL" class="org.apache.log4j.RollingFileAppender">
    		<param name="File" value="${webApp.root}/logs/fatal.log" />
    		<param name="MaxFileSize" value="10240KB" />
    		<param name="MaxBackupIndex" value="10" />
    		<param name="Encoding" value="UTF-8" />
    		<layout class="org.apache.log4j.PatternLayout">
    			<param name="ConversionPattern" value="%d{yyy-MM-dd HH:mm:ss} [%-5p] %c {%F:%L} - %m%n" />
    		</layout>
    		<filter class="org.apache.log4j.varia.LevelRangeFilter">
    			<param name="LevelMin" value="FATAL" />
    			<param name="LevelMax" value="FATAL" />
    		</filter>
    	</appender>
       
    	
    	<logger name="org.springframework">
    		<level value="WARN" />
    	</logger>
    	<logger name="org.springframework.web">
    		<level value="WARN" />
    	</logger>
    	
    	
    	<logger name="org.hibernate">
    		<level value="DEBUG" />
    	</logger> 
    	
    	
    	
    	<logger name="java.sql.Connection">
    		<level value="DEBUG" />
    	</logger> 
    	
    	
    	<root>
    		<level value="DEBUG" />
    		<appender-ref ref="LOG.Console" />
    		<appender-ref ref="LOG.DEBUG" />
    		<appender-ref ref="LOG.INFO" />
    		<appender-ref ref="LOG.WARN" />
    		<appender-ref ref="LOG.ERROR" />
    		<appender-ref ref="LOG.FATAL" />
    	</root>
    </log4j:configuration>

**2.web.xml添加配置log4j**

<context-param>
    		<param-name>webAppRootKey</param-name>
    		<param-value>webApp.root</param-value>
    	</context-param>
    	
    	
    	<context-param>
    		<param-name>log4jConfigLocation</param-name>
    		<param-value>/WEB-INF/log4j.xml</param-value>
    	</context-param>
    	
    	<context-param>
    		<param-name>log4jRefreshInterval</param-name>
    		<param-value>60000</param-value>
    	</context-param>
    	
    	
    	<listener>
    		<listener-class>
    			org.springframework.web.util.Log4jConfigListener
    		</listener-class>
    	</listener>

**3.项目中记录异常日志**

private static final Logger logger = Logger.getLogger(LxwmController.class);
    	
    logger.error("异常信息");