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Google App Engine: RUN JSP ERROR

I used Eclipse to try the google app engine demo project: guestbook.
when i create a *.jsp file in the WAR directory,the error information appear:
"Your Web Application Project must be configured to use a JDK in order to use JSPs."
solution:
It is because Eclipse put the JRE to the JRE directory, but not the JDK directory.
under "windows - preference", expand "Java". click on "Installed JRE":
change the location to JDK directory.
refresh the project. Done!!!


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package com.pan.encod;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
public class EncodFilter impl ......

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jspÁ¬½Ó¸÷ÖÖÊý¾Ý¿â´óÈ«

ÏÖÔÚÓкöà³õѧJSPµÄÍøÓѾ­³£»áÎÊÊý¾Ý¿âÔõôÁ¬½Ó°¡£¬ÔõôÀϳö´í°¡£¿ËùÒÔÎÒ¼¯ÖеÄÔÚÕâдƪÎÄÕ¹©´ó¼Ò²Î¿¼£¬ÆäʵÕâÖÖ°ÑÊý¾Ý¿âÂß¼­È«²¿·ÅÔÚjspÀïδ±ØÊǺõÄ×ö·¨£¬µ«ÊÇÓÐÀûÓÚ³õѧÕßѧϰ£¬ËùÒÔÎÒ¾ÍÕâÑù×öÁË£¬µ±´ó¼Òѧµ½Ò»¶¨³Ì¶ÈµÄʱºò£¬¿ÉÒÔ¿¼ÂÇÓÃMVCµÄģʽ¿ª·¢¡£ÔÚÁ·Ï°ÕâЩ´úÂëµÄʱºò£¬ÄãÒ»¶¨½«JDBCµÄÇý¶¯³ÌÐò·Åµ½·þÎñÆ÷µÄÀà·¾ ......

jspÒ³ÃæÀûÓÃjs activexobjectµ÷Óÿͻ§»úexeÎļþ

<SCRIPT language=JavaScript>
function Run(strPath)
{
try
{
var objShell = new ActiveXObject("wscript.shell");
objShell.Run(strPath);
objShell = null;
//alert("ok");
}
catch(e)
{
alert('ÕÒ²»µ½ÎÄ ......
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