Netbeans will not treat JSP as Source Level 7

Question

I\'m trying to run a .jsp page I made and keep encountering this error:

type Exception report

message Internal Server Error

Answer 1

In my opinion this has nothing to do with Netbeans, but rather with the application server in use. Is suspect you're using Glassfish or Tomcat as they are bundled together with Netbeans 7.

I had the same problem with Apache Tomcat and it boiled down to that Tomcat (Apache Jasper library) is using Java 1.6 for JSP compilation by default. You'll have to change the default configuration of the JSP servlet in web.xml. I added the following lines to the application's web.xml, note the two parameters compilerSourceVM and compilerTargetVM:

<!-- Jasper JSP configuration -->
<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>compilerSourceVM</param-name>
        <param-value>1.7</param-value>
    </init-param>
    <init-param>
        <param-name>compilerTargetVM</param-name>
        <param-value>1.7</param-value>
    </init-param>
    <load-on-startup>3</load-on-startup>
</servlet>

<!-- The mappings for the JSP servlet -->
<servlet-mapping>
    <servlet-name>jsp</servlet-name>
    <url-pattern>*.jsp</url-pattern>
    <url-pattern>*.jspx</url-pattern>
</servlet-mapping>