log4j2在webapp项目中的配置

搭建一个web app框架，提示log4j2找不到配置。

在web.xml中配置了：
<context-param>
<param-name>log4jConfiguration</param-name>
<param-value>classpath:conf/log4j2.xml</param-value>
</context-param>
<context-param>
<param-name>log4jRefreshInterval</param-name>
<param-value>60000</param-value>
</context-param>

在pom.xml中配置了
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>2.7</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.7</version>
</dependency>

<dependency>
  <groupId>org.apache.logging.log4j</groupId>
  <artifactId>log4j-web</artifactId>
  <version>2.7</version>
  <scope>runtime</scope>
</dependency>

<dependency>
  <groupId>org.apache.logging.log4j</groupId>
  <artifactId>log4j-taglib</artifactId>
  <version>2.7</version>
</dependency>

之前web.xml的配置是：

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
verison="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

后来改成
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
verison="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_3_0.xsd">

还是提示找不到。
我的项目是用IDEA自动创建的，再后来看到别人的文件头里，用的是"javaee"，改成下面这样的：

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/j2ee/web-app_3_0.xsd">

ok,log4j2可以用了。