优化tomcat

去掉jsp编译后的空行

Tomcat 5.5.x+，在Tomcat安装目录/conf/web.xml中找到名叫"jsp"的servlet，添加下面一段代码：
<init-param>
<param-name>trimSpaces</param-name>
<param-value>true</param-value>
</init-param>
添加后如下所示：
    <servlet>
        <servlet-name>jsp</servlet-name>
        <servlet-class>org.apache.jasper.servlet.JspServlet</servlet-class>
        <init-param>
            <param-name>fork</param-name>
            <param-value>false</param-value>
        </init-param>
        <init-param>
            <param-name>xpoweredBy</param-name>
            <param-value>false</param-value>
        </init-param>
<init-param>
<param-name>trimSpaces</param-name>
<param-value>true</param-value>
</init-param>
        <load-on-startup>3</load-on-startup>
    </servlet>
最后记得清空缓存。


使文件链接显示下载窗口而不打开

在web.xml中<web-app> </web-app>之间 加入如下代码

<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>



404错误跳转

在web.xml中<web-app> </web-app>之间 加入如下代码

<error-page>
  <error-code>401</error-code>
  <location>/unfind.jsp</location>
  </error-page>
<error-page>
  <error-code>404</error-code>
  <location>/unfind.jsp</location>
  </error-page>
   <error-page>
  <error-code>500</error-code>
  <location>/unfind.jsp</location>
  </error-page>
<error-page>
  <exception-type>java.lang.NullPointerException</exception-type>
  <location>/unfind.jsp</location>
  </error-page>