通用web.xml配置

,错误页面友好提示
500 页面编译错误
404 页面没有找到
403 因用户试图访问未授权文档而产生
如下：

<error-page> 
<exception-type>java.lang.Throwable</exception-type> 
<location>/500.jsp</location> 
</error-page> 
<error-page> 
<error-code>500</error-code> 
<location>/500.jsp</location> 
</error-page> 
<error-page> 
<error-code>404</error-code> 
<location>/404.jsp</location> 
</error-page> 
<error-page> 
<error-code>403</error-code> 
<location>/403.jsp</location>
</error-page>

选择文件的打开方式为ie自己打开还是下载后打开

<!-- upload file type -->
<mime-mapping> 
<extension>doc</extension> 
<mime-type>application/msword</mime-type> 
</mime-mapping>
<mime-mapping> 
<extension>xls</extension> 
<mime-type>application/msexcel</mime-type> 
</mime-mapping> 
<mime-mapping> 
<extension>pdf</extension> 
<mime-type>application/pdf</mime-type> 
</mime-mapping> 
<mime-mapping> 
<extension>zip</extension> 
<mime-type>application/zip</mime-type> 
</mime-mapping> 
<mime-mapping> 
<extension>rar</extension> 
<mime-type>application/rar</mime-type> 
</mime-mapping> 
<mime-mapping> 
<extension>txt</extension> 
<mime-type>application/txt</mime-type> 
</mime-mapping> 
<mime-mapping> 
<extension>chm</extension> 
<mime-type>application/mshelp</mime-type> 
</mime-mapping> 
<mime-mapping> 
<extension>mp3</extension> 
<mime-type>audio/x-mpeg</mime-type> 
</mime-mapping>

设置系统查找log4j.properties文件的路径

<context-param>
		<param-name>log4jConfigLocation</param-name>
		<param-value>/WEB-INF/log4j.properties</param-value>
	</context-param>

添加过滤器，对所有路径下所传得参数进行过滤

<filter>
		<filter-name>EncodingFilter</filter-name>
		<filter-class>
			com.xxx.xxx.EncodingFilter
		</filter-class>
		<init-param>
			<param-name>encoding</param-name>
			<param-value>GBK</param-value>
		</init-param>
</filter>
	<filter-mapping>
		<filter-name>EncodingFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>

设置启动级别

<load-on-startup>1</load-on-startup>

欢迎页面,即进入项目时候默认的页面

<welcome-file-list>
		<welcome-file>index.html</welcome-file>
	</welcome-file-list>