In a production application you may want to have the jsp's in the app pre-compiled rather than taking the performance hit the first time the page loads. Weblogic server gives you a way to compile your jsp's at build time and package the compiled classes in your ear file.

This is  a sample ant build script that shows how to use an Ant target to compile jsp pages and build the war file containing the compiled jsps

 <?xml version="1.0" encoding="UTF-8"?>
<project name="precompile" default="deploy" basedir=".">

    <property name="basedir" value="."/>
    <property name="lib" value="${basedir}/lib"/>
    <property name="jsp" value="${basedir}/jsp"/>
    <property name="war.file" value="${basedir}/precompile.war"/>
    <property name="build.dir" value="${basedir}/build"/>
    <property name="build.classes" value="${build.dir}/classes"/>
    <property name="war.dir" value="${build.dir}/war"/>

    <path id="cp">
        <pathelement path="${build.classes}"/>
        <fileset dir="${lib}" includes="**/*.jar"/>
    </path>

    <target name="prepare">
        <mkdir dir="${build.classes}"/>
        <mkdir dir="${war.dir}"/>
    </target>
   
    <target name="jsp_precompile" depends="prepare">
        <java classname="weblogic.jspc" fork="yes" failonerror="true"
              output="${basedir}/results.jspc" dir="${jsp}">
            <jvmarg value="-Dweblogic.jsp.windows.caseSensitive=true"/>

            <arg line="-verbose -noTryBlocks -depend -compileAll -webapp ${war.dir} -d ${war.dir}/WEB-INF ."/>
            <classpath refid="cp"/>
        </java>
    </target>

  
    <target name="deploy" depends="jsp_precompile">
        
        <copy todir="${war.dir}">
            <fileset dir="${basedir}/jsp"/>
            <fileset dir="${basedir}/html"/>
        </copy>
       
        <copy todir="${war.dir}/WEB-INF">
            <fileset dir="${basedir}/etc"/>
        </copy>
        
         <jar jarfile="${war.file}" basedir="${war.dir}"/>

    </target>

    <target name="clean">
        <delete dir="${build.classes}"/>
        <delete dir="${war.dir}"/>
        <delete file="${war.file}"/>
    </target>
   
</project>

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