Element filtername is not allowed here-web.xml version="3.0"-intellij idea

背景：最近在使用IntellijIdea2016搭建项目的时候，在web.xml中出现了element filtername is not allowed here的错误。

原因：总体来讲，后来查出来的原因是web.xml头部的配置有错误的，当然网上也有说各种原因的。

解决办法：更换web.xml头部(代码中前4行)。

我目前的配置如下，如果遇到该问题可以参考如下：

1. <?xml version="1.0" encoding="utf-8"?>
2. <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee"
3. xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
4. id="WebApp_ID" version="3.0">
5. <!-- 配置Spring配置文件路径 -->
6. <context-param>
7. <param-name>contextConfigLocation</param-name>
8. <param-value>
9. classpath:applicationContext.xml
10. </param-value>
11. </context-param>
12. <!-- 配置Spring上下文监听器 -->
13. <listener>
14. <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
15. </listener>
17. <!-- 配置Spring字符编码过滤器 -->
18. <filter>
19. <filter-name>encodingFilter</filter-name>
20. <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
21. <init-param>
22. <param-name>encoding</param-name>
23. <param-value>UTF-8</param-value>
24. </init-param>
25. <init-param>
26. <param-name>forceEncoding</param-name>
27. <param-value>true</param-value>
28. </init-param>
29. </filter>
30. <filter-mapping>
31. <filter-name>encodingFilter</filter-name>
32. <url-pattern>/*</url-pattern>
33. </filter-mapping>
35. <!-- 配置log4j配置文件路径、检测日志配置文件变化 -->
36. <context-param>
37. <param-name>log4jConfigLocation</param-name>
38. <param-value>classpath:log4j.properties</param-value>
39. <param-name>log4jRefreshInterval</param-name>
40. <param-value>30000</param-value>
41. </context-param>
42. <!-- 配置Log4j监听器 -->
43. <listener>
44. <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
45. </listener>
47. <!-- 首页 -->
48. <welcome-file-list>
49. <welcome-file>/index.jsp</welcome-file>
50. </welcome-file-list>
52. <!-- 错误页 -->
53. <error-page>
54. <error-code>404</error-code>
55. <location>/error/404.jsp</location>
56. </error-page>
57. <error-page>
58. <error-code>500</error-code>
59. <location>/error/500.jsp</location>
60. </error-page>
61. </web-app>

资料参考：http://*.com/questions/17563756/element-listener-class-not-allowed-in-my-web-xml

http://blog.csdn.net/cor_twi/article/details/51063541