tomcat 编译版本

<servlet>
    <servlet-name>jsp</servlet-name>
    <servlet-class>org.apache.jasper.servlet.JspServlet</servlet-class>
    <!--编译器版本-->    
    <init-param>            
        <param-name>compilerSourceVM</param-name>            
        <param-value>1.5</param-value>
    </init-param>         
    <init-param>           
        <param-name>compilerTargetVM</param-name>           
        <param-value>1.5</param-value>         
    </init-param>    
    <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>
    <load-on-startup>3</load-on-startup>
</servlet>