GlassFish 3 Tip of the Day: Using JDK 7 with JSP Code

A question came up on the NetBeans J2EE Mailing List about using JDK 7 with GlassFish 3.1.2. Specifically, they were getting the error:

org.apache.jasper.JasperException: PWC6033: Error in Javac compilation for JSP
PWC6197: An error occurred at line: 4 in the jsp file: /index.jspPWC6199: Generated servlet error:strings in switch are not supported in -source 1.5  (use -source 7 or higher to enable strings in switch)

The fix is quite simple. You must include a glassfish-web.xml file in your project, and set a couple of properties. compilerSourceVM and compilerTargetVM.

Please see the example below for a complete configuration.

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<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE glassfish-web-app PUBLIC "-//GlassFish.org//DTD GlassFish Application Server 3.1 Servlet 3.0//EN" "http://glassfish.org/dtds/glassfish-web-app_3_0-1.dtd"> <glassfish-web-app error-url="">   <class-loader delegate="true"/>   <jsp-config>     <property name="keepgenerated" value="true">       <description>Keep a copy of the generated servlet class' java code.</description>     </property>     <property name="compilerSourceVM" value="7"/>     <property name="compilerTargetVM" value="7"/>   </jsp-config> </glassfish-web-app>

The project will now compile and use JDK7.