SSM项目配置Log4j2

超、凢脫俗 2022-11-19 01:16 322阅读 0赞

### SSM项目配置Log4j2 ###

*  前言：
 *  1、在pom.xml中导入依赖:
 *  2、Web.xml配置:
 *  3、在resources目录下面新建log4j2.xml
 *  4、写个测试类测试日志打印：

# 前言： #

**在Spring5.x版本之后，原来的Log4j有很多东西废弃了，所以改用log4j2**

# 1、在pom.xml中导入依赖: #

<dependency>
          <groupId>org.apache.logging.log4j</groupId>
          <artifactId>log4j-api</artifactId>
          <version>2.10.0</version>
        </dependency>
        <dependency>
          <groupId>org.apache.logging.log4j</groupId>
          <artifactId>log4j-core</artifactId>
          <version>2.10.0</version>
        </dependency>
    
        <dependency>
          <groupId>org.apache.logging.log4j</groupId>
          <artifactId>log4j-web</artifactId>
          <version>2.9.1</version>
        </dependency>

# 2、Web.xml配置: #

<context-param>
        
        <param-name>log4jConfiguration</param-name>
        <param-value>classpath:log4j2.xml</param-value>
      </context-param>
    	<listener>
        
        
        <listener-class>org.apache.logging.log4j.web.Log4jServletContextListener</listener-class>
     	</listener>
    
      <filter>
        <filter-name>log4jServletFilter</filter-name>
        <filter-class>org.apache.logging.log4j.web.Log4jServletFilter</filter-class>
      </filter>
      <filter-mapping>
        <filter-name>log4jServletFilter</filter-name>
        <url-pattern>/*</url-pattern> <dispatcher>REQUEST</dispatcher> <dispatcher>FORWARD</dispatcher> <dispatcher>INCLUDE</dispatcher> <dispatcher>ERROR</dispatcher> </filter-mapping>

# 3、在resources目录下面新建log4j2.xml #

<?xml version="1.0" encoding="UTF-8"?>
    
    
    
    
    
    
    
    <configuration status="TRACE" monitorInterval="30">
        <properties>
            
             <property name="LOG_HOME">${ sys:catalina.home}/logs</property>
            <property name="FILE_NAME">opms</property>
        </properties>
        
        <appenders>
            
            <console name="Console" target="SYSTEM_OUT">
                
                <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
            </console>
            
            <File name="SqlFile" fileName="${LOG_HOME}/${FILE_NAME}/sql.log" append="true">
                <PatternLayout>
                    
                    <pattern>%d{ HH:mm:ss} [%t] %-5level %logger{ 36} - %msg%n</pattern>
                </PatternLayout>
            </File>
            
            <File name="log" fileName="${LOG_HOME}/${FILE_NAME}/test.log" append="false">
                <PatternLayout pattern="%d{HH:mm:ss.SSS} %-5level %class{36} %L %M - %msg%xEx%n"/>
            </File>
    
            
            
            <RollingFile name="RollingFileInfo" fileName="${LOG_HOME}/${FILE_NAME}/info.log"
                         filePattern="${LOG_HOME}/${FILE_NAME}/log/$${date:yyyy-MM}/info-%d{yyyy-MM-dd}-%i.log">
                
                <ThresholdFilter level="debug" onMatch="ACCEPT" onMismatch="DENY"/>
                <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
    
                <Policies>
                    <TimeBasedTriggeringPolicy/>
                    <SizeBasedTriggeringPolicy size="10 MB"/>
                </Policies>
            </RollingFile>
    
            
            <RollingFile name="RollingFileWarn" fileName="${LOG_HOME}/${FILE_NAME}/warn.log"
                         filePattern="${LOG_HOME}/${FILE_NAME}/$${date:yyyy-MM}/warn-%d{yyyy-MM-dd}-%i.log">
    
                <ThresholdFilter level="warn" onMatch="ACCEPT" onMismatch="DENY"/>
                <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
                <Policies>
                    <TimeBasedTriggeringPolicy/>
                    <SizeBasedTriggeringPolicy size="100 MB"/>
                </Policies>
                
                <DefaultRolloverStrategy max="20"/>
            </RollingFile>
    
            
            <RollingFile name="RollingFileError" fileName="${LOG_HOME}/${FILE_NAME}/error.log"
                         filePattern="${LOG_HOME}/${FILE_NAME}/$${date:yyyy-MM}/error-%d{yyyy-MM-dd}-%i.log">
                <ThresholdFilter level="error" onMatch="ACCEPT" onMismatch="DENY"/>
                <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
                <Policies>
                    <TimeBasedTriggeringPolicy/>
                    <SizeBasedTriggeringPolicy size="100 MB"/>
                </Policies>
            </RollingFile>
    
        </appenders>
    
        
        <loggers>
            
            <logger name="com.ssm.dao" level="DEBUG">
                <AppenderRef ref="Console"/>
                <AppenderRef ref="SqlFile"/>
            </logger>
    
            
            <logger name="org.springframework" level="INFO"/>
            <logger name="org.mybatis" level="INFO"/>
    
            
            <root level="all">
                
                <appender-ref ref="RollingFileInfo"/>
                
                <appender-ref ref="RollingFileWarn"/>
                
                <appender-ref ref="RollingFileError"/>
                
                <appender-ref ref="SqlFile"/>
    
                
                
                <appender-ref ref="Console"/>
            </root>
    
        </loggers>
    
    </configuration>

> $\{sys:catalina.home\}为tomcat的路径

# 4、写个测试类测试日志打印： #

package com.ssm.test;
    
    
    import org.apache.logging.log4j.LogManager;
    import org.apache.logging.log4j.Logger;
    
    public class TestLog4j2 { 
        static Logger logger= LogManager.getLogger(LogManager.ROOT_LOGGER_NAME);
    
        public static void main(String[] args) { 
            logger.trace("trace message");
            logger.debug("debug message");
            logger.info("info message");
            logger.warn("warn message");
            logger.error("error message");
            logger.fatal("fatal message");
            System.out.println("Hello World!");
        }
    }

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzNzUzNzI0_size_16_color_FFFFFF_t_70]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzNzUzNzI0_size_16_color_FFFFFF_t_70 1]

> 可以看到控制台和文件都有了日志的输出

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzNzUzNzI0_size_16_color_FFFFFF_t_70 1]: /images/20221022/2a86e078f5cb4429922d806a38269ea1.png