spring5.0以上解决Log4jConfigListener不可用问题

升级到spring5.0,发现之前web.xml 里配置的log监听Log4jConfigListener被spring废弃了,spring建议用log4j2 来替换
这个是web.xml之前的配置**(移除)**:

<context-param> 
        <param-name>log4jConfigLocation</param-name>
        <param-value>classpath:log4j.xml</param-value>
</context-param>
<listener>
        <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
</listener> 

移除旧的Jar包依赖:

<!--log -->
<!-- <dependency>
	<groupId>org.slf4j</groupId>
	<artifactId>slf4j-api</artifactId>
	<version>${slf4j_version}</version>
</dependency>
<dependency>
	<groupId>org.slf4j</groupId>
	<artifactId>slf4j-log4j12</artifactId>
	<version>${slf4j_version}</version>
</dependency> -->
<!-- <dependency>
	<groupId>log4j</groupId>
	<artifactId>log4j</artifactId>
	<version>${log4j_version}</version>
</dependency> -->
<!--END -->

需要引入新的Jar包依赖

<!-- log4j2  -->
		<dependency>
	        <groupId>org.apache.logging.log4j</groupId>
	        <artifactId>log4j-api</artifactId>
	        <version>${log4j2_version}</version>
	    </dependency>
	    <dependency>
	        <groupId>org.apache.logging.log4j</groupId>
	        <artifactId>log4j-core</artifactId>
	        <version>${log4j2_version}</version>
	    </dependency>
	    <dependency>
	      <groupId>org.apache.logging.log4j</groupId>
	      <artifactId>log4j-web</artifactId>
	      <version>${log4j2_version}</version>
	    </dependency>
	    <dependency> <!-- 桥接:告诉Slf4j使用Log4j2 -->
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-slf4j-impl</artifactId>
            <version>${log4j2_version}</version>
        </dependency>
        <dependency> <!-- 桥接:告诉commons logging使用Log4j2 -->
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-jcl</artifactId>
            <version>${log4j2_version}</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${slf4j_version}</version>
        </dependency>
		<!--END -->

web.xml 的配置如下:
(1):替换web.xml的头信息,将其由2.4版本替换为2.5,并加入下列配置信息

<!-- log4j2-begin -->
     <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>
     <!--context param-->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:ApplicationContext.xml</param-value>
    </context-param>
    <context-param>
        <param-name>log4jConfigLocation</param-name>
        <param-value>classpath:log4j2.xml</param-value>
    </context-param>
     <!-- log4j2-end -->

src/main/resources`目录下新增log4j2.xml 文件,这个文件名是官方默认的

<?xml version="1.0" encoding="UTF-8"?>
 <!--日志级别以及优先级排序: OFF > FATAL > ERROR > WARN > INFO > DEBUG > TRACE > ALL -->
 <!--Configuration后面的status,这个用于设置log4j2自身内部的信息输出,可以不设置,当设置成trace时,你会看到log4j2内部各种详细输出-->
 <!--monitorInterval:Log4j能够自动检测修改配置 文件和重新配置本身,设置间隔秒数-->
 <configuration status="warn" monitorInterval="30">
     <!--先定义所有的appender-->
     <appenders>
     <!--这个输出控制台的配置-->
         <console name="Console" target="SYSTEM_OUT">
         <!--输出日志的格式-->
             <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
         </console>
     <!--文件会打印出所有信息,这个log每次运行程序会自动清空,由append属性决定,这个也挺有用的,适合临时测试用-->
     <File name="log" fileName="log/test.log" append="false">
        <PatternLayout pattern="%d{HH:mm:ss.SSS} %-5level %class{36} %L %M - %msg%xEx%n"/>
     </File>
     <!-- 这个会打印出所有的info及以下级别的信息,每次大小超过size,则这size大小的日志会自动存入按年份-月份建立的文件夹下面并进行压缩,作为存档-->
         <RollingFile name="RollingFileInfo" fileName="${sys:user.home}/logs/info.log"
                      filePattern="${sys:user.home}/logs/$${date:yyyy-MM}/info-%d{yyyy-MM-dd}-%i.log">
             <!--控制台只输出level及以上级别的信息(onMatch),其他的直接拒绝(onMismatch)-->
             <ThresholdFilter level="info" onMatch="ACCEPT" onMismatch="DENY"/>
             <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
             <Policies>
                 <TimeBasedTriggeringPolicy/>
                 <SizeBasedTriggeringPolicy size="100 MB"/>
             </Policies>
         </RollingFile>
         <RollingFile name="RollingFileWarn" fileName="${sys:user.home}/logs/warn.log"
                      filePattern="${sys:user.home}/logs/$${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属性如不设置,则默认为最多同一文件夹下7个文件,这里设置了20 -->
             <DefaultRolloverStrategy max="20"/>
         </RollingFile>
         <RollingFile name="RollingFileError" fileName="${sys:user.home}/logs/error.log"
                      filePattern="${sys:user.home}/logs/$${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>
     <!--然后定义logger,只有定义了logger并引入的appender,appender才会生效-->
     <loggers>
         <!--过滤掉spring和mybatis的一些无用的DEBUG信息-->
         <logger name="org.springframework" level="info"></logger>
         <logger name="org.mybatis" level="info"></logger>
         <root level="all">
             <appender-ref ref="Console"/>
             <appender-ref ref="RollingFileInfo"/>
             <appender-ref ref="RollingFileWarn"/>
             <appender-ref ref="RollingFileError"/>
         </root>
     </loggers>
 </configuration>

最后将项目中的配置文件中引用log4j的地方换成log4j2

如该项目为web项目,则仍需进行以下操作:

(1)log4j2不支持servlet2.4版以下版本,故将servlet升级为2.5以上版本

<dependency>
	<groupId>javax.servlet</groupId>
	<artifactId>javax.servlet-api</artifactId>
	<version>${servlet_version}</version>
</dependency>

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