在conf目錄下的web.xml新增：

1. <servlet>
2.         <servlet-name>jsp</servlet-name>
3.         <servlet-class>org.apache.jasper.servlet.JspServlet</servlet-class>
4.         <init-param>
5.             <param-name>fork</param-name>
6.             <
   param-value>false</param-value>
7.         </init-param>
8.         <init-param>
9.             <param-name>xpoweredBy</param-name>
10.             <param-value>false</param-value>
11.         </init-param>
12.         <init-param>
13.             <param-name>development
    </param-name>
14.             <param-value>true</param-value>
15.         </init-param>
16.             <load-on-startup>3</load-on-startup>
17.     </servlet>

        <init-param>
            <param-name>development</param-name>
            <param-value>true</param-value>
        </init-param>

一般需要新增