ant编译JSP

用ant   运行下面的编译，可以将jsp编译为.java,然后再编译为.class，可是运行时会因为jsp页面等代码的错误而停止，大家有什么好的方法 
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<?xml   version= "1.0 "   encoding= "iso-8859-1 "?> <project   name= "tomcat   precompile "   default= "dist "   basedir= ". "> 
        <property   name= "tomcat.home "   location= "D:\Tomcat "/> 
        <property   name= "ant "   location= "D:\Program   Files\ant1.5 "/> 
        <property   name= "libpath "   location= "E:\JSPPrecompile\lib "/> 
        <property   name= "webapp.name "   value= "ischool "   /> 
        <property   name= "webapp.path "   location= "${tomcat.home}/webapps/${webapp.name} "/>         <target   name= "jspc "> 
                <taskdef   classname= "org.apache.jasper.JspC "   name= "jasper2 "   > 
                        <classpath   id= "jspc.classpath "> 
                                <pathelement   location= "${java.home}/../lib/tools.jar "/> 
                                <fileset   dir= "${tomcat.home}/server/lib "> 
                                        <include   name= "*.jar "/> 
                                </fileset> 
                                <fileset   dir= "${tomcat.home}/common/lib "> 
                                        <include   name= "*.jar "/> 
                                </fileset> 
                        </classpath> 
                </taskdef>                 <taskdef   name= "foreach " 
                                classname= "net.sf.antcontrib.logic.ForEach " 
                                classpath= "${ant}/ant-contrib.jar "   />                 <jasper2 
                          validateXml= "false " 
                          uriroot= "${webapp.path} " 
                          webXmlFragment= "${webapp.path}/WEB-INF/generated_web.xml " 
                          outputDir= "${webapp.path}/WEB-INF/src " 
                          package= "some.unique.string.asd34sad "> 
                </jasper2>                 <replaceregexp   match= "^package   some.unique.string.asd34sad.*; " 
                                              replace= "package   org.apache.jsp; " 
                                              byline= "true "> 
                        <fileset   dir= "${webapp.path}/WEB-INF/src "> 
                                <include   name= "**/*.* "/> 
                        </fileset> 
                </replaceregexp>                 <echo> Compiling   generated   classes   from   JSPC </echo> 
                <foreach   target= "do-jsp-compile "   param= "dir-path "> 
                        <path> 
                                <dirset   dir= "${webapp.path}/WEB-INF/src "/> 
                        </path> 
                </foreach> 
                <move   todir= "${tomcat.home}/work/Standalone/localhost/${webapp.name} "> 
                        <fileset   dir= "${webapp.path}/WEB-INF/src "> 
                                <include   name= "**/*.* "/> 
                        </fileset> 
                </move> 
        </target>         <target   name= "do-jsp-compile "> 
                <echo> Compile   JSP   in:   ${dir-path} </echo> 
                <javac   destdir= "${dir-path} " 
                              optimize= "off " 
                              debug= "on " 
                              failonerror= "false " 
                              srcdir= "${dir-path} " 
                              > 
                        <classpath> 
                                <pathelement   location= "${webapp.path}/WEB-INF/classes "/> 
                                <fileset   dir= "${webapp.path}/WEB-INF/lib "> 
                                        <include   name= "*.jar "/> 
                                </fileset> 
                                <pathelement   location= "${tomcat.home}/common/classes "/> 
                                <fileset   dir= "${tomcat.home}/common/lib "> 
                                        <include   name= "*.jar "/> 
                                </fileset> 
                                <pathelement   location= "${tomcat.home}/shared/classes "/> 
                                <fileset   dir= "${tomcat.home}/server/lib "> 
                                        <include   name= "*.jar "/> 
                                </fileset> 
                        </classpath> 
                        <include   name= "*.java "   /> 
                </javac> 
                <mkdir   dir= "${dir-path}/org/apache/jsp "/> 
                <move   todir= "${dir-path} "   failonerror= "false "> 
                        <fileset   dir= "${dir-path}/org/apache/jsp "> 
                                <include   name= "*.* "/> 
                        </fileset> 
                </move> 
                <delete   dir= "${dir-path}/org "   failonerror= "false "/> 
        </target> 
        <target   name= "dist "   depends= "jspc "   > 
        </target> </project>