log4j-1.2.6升级到log4j-2.9.0

0.工程是普通java web工程,不是maven工程.需要升级log4j

步骤发下:

1. 在build path中 移除项目对log4j-1.2.6.jar的引用,并物理删除log4j-1.2.6.jar文件

2.复制下面4个文件到WEB-INF/lib下

• log4j-core-2.9.0.jar
• log4j-api-2.9.0.jar
• log4j-1.2-api-2.9.0.jar
• log4j-web-2.9.0.jar

3.在build path中添加对 上面复制的4个文件的引用

4.修正web.xml文件

 <!-- ***** log4j ***** -->
    <!-- 
    <context-param>
      <param-name>webAppRootKey</param-name>
      <param-value>bookliner.root</param-value>
    </context-param>

    <context-param>
      <param-name>log4jConfigLocation</param-name>
      <param-value>classpath:log4j-unittest.xml</param-value>
    </context-param>

    <listener>
      <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
    </listener>
    -->

    <!-- log4j2-begin -->
    <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>
    <!-- log4j2-end -->

5.根据原来的log4j.xml来编写log4j2.xml文件(内容略), 删除log4j.xml.

上记5步即可完成log4j的升级

PS:

jar文件下载

在 http://mvnrepository.com/ 中搜索, 搜索时不用带版本号,本来这个网站是提供maven依赖的,但是也提供了jar的下载

参考:

Using Log4j 2 in Web Applications

https://blog.csdn.net/zhiyuzhe/article/details/78850238

log4j2.xml详细配置