为什么有一些jsp不能编译？
我练习书上的例子，基本能成功，今天在网上复制了一个jsp，使用数据源的，放在tomcat的目录下，但是在浏览器中输入jsp的名字，出现以下错误，请大侠帮助解答啊！


HTTP   Status   500   -  

--------------------------------------------

type   Exception   report

message  

description   The   server   encountered   an   internal   error   ()   that   prevented   it   from   fulfilling   this   request.

exception  

org.apache.jasper.JasperException:   Unable   to   compile   class   for   JSP:  

An   error   occurred   at   line:   6   in   the   jsp   file:   /sessiontest/test.jsp
Syntax   error   on   token   "Invalid   Character ",   delete   this   token
3:   <%@   page   import= "javax.sql.* "%>
4:   <%@   page   import= "javax.naming.* "%>
5:   <%@   page   session= "false "   %>
6:   <%  
7:         DataSource   ds   =   null;
8:         try
9:       {


Stacktrace:
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:85)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:330)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:415)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:308)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:286)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:273)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:566)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:308)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)


note   The   full   stack   trace   of   the   root   cause   is   available   in   the   Apache   Tomcat/6.0.10   logs.


------解决方案--------------------
检查你下你的 <%%> 之间的代码，是不是有全角空格之类的不可见符号

注意是全角的
------解决方案--------------------
<%
7: DataSource ds = null;
8: try
9: {

<%DataSource ds = null;
try
{

....
....


或者拿到IDE中，应该会显示出错误提示，eclipse or JBuilder
------解决方案--------------------
其实你可以把 <%%> 中的代码重新输入一遍的
我的异常网推荐解决方案：The server encountered an internal error () that prevented it from fulfilling this request.,http://www.aiyiweb.com/java-web/317.html
我的异常网推荐解决方案：org.apache.jasper.JasperException: Unable to compile class,http://www.aiyiweb.com/j2ee/2308.html