Edward
The problem is with your javascript:
<form method="get" >
<input type="submit" name="Open" value="Open" style="width:200px"
onClick="this.form.action='/test/servlet1?value=99&msg=Open&kubun=1'">
<input type="submit" name="Private" value="Private" style="width:200px"
onClick="this.form.action='/test/servlet1?value=18&msg=Private&kubun=0'">
</form>
That is the output. The "this.form.action" is the problem. This takes the
URL for the form submission ('/test/servlet1?value=18&msg=Private&kubun=0').
You are trying to include the parameters in the URL - a reasonable try but
the browser does not accept this and truncates the URL to a valid URL - ie
/test/servlet1 - and your extra parameters are lost.
If you need to do this I suggest placing the the values into three hidden
parameters (value, msg and kubun). You can then, using javascript update
their values using Form.elements[] array to extract the Hidden javascript
objects and update the value with your desired values before submitting.
Hope this helps,
Andrew
Professional Java Servlets 2.3
http://www.amazon.com/exec/obidos/ASIN/186100561X
http://www.amazon.co.uk/exec/obidos/ASIN/186100561X
-----Original Message-----
From: Edward [mailto:zhangsc@n...]
Sent: 14 June 2002 08:24
To: Servlets
Subject: [servlets] why Servlet can't receive right result from JSP?
I want to make Servlet receive message from JSP.But Servlet show message is
null,I'm very puzzled with it.My files is follows:
//Jsp.jsp
<%@ page contentType="text/html; charset=GBK" %>
<html>
<head>
</head>
<body>
<%
String message[]=new String[2];
String SysID[]=new String[2];
String kubun[]=new String[2];
message[0]="Open";
message[1]="Private";
SysID[0]="99";
SysID[1]="18";
kubun[0]="1";
kubun[1]="0";
%>
<form method="get" >
<%
for(int cntr=0;cntr<2;cntr++)
{
%>
<input type="submit" name="<%= message[cntr] %>" value="<%
message[cntr] %>" style="width:200px"
onClick="this.form.action='/test/servlet1?value=<%= SysID[cntr] %>&msg=<%
message[cntr] %>&kubun=<%= kubun[cntr] %>'">
<%
}
%>
</form>
</body>
</html>
//Servlet1.java
package testjsp;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
public class Servlet1 extends HttpServlet {
private static final String CONTENT_TYPE = "text/html; charset=GBK";
//Initialize global variables
public void init() throws ServletException {
}
//Process the HTTP Get request
public void doGet(HttpServletRequest request, HttpServletResponse
response) throws ServletException, IOException {
response.setContentType(CONTENT_TYPE);
PrintWriter out = response.getWriter();
out.println("<html>");
out.println("<head><title>Servlet1</title></head>");
out.println("<body>");
out.println("<p>The servlet has received a GET. This is the
reply.</p>");
out.println("<p>kubun is "+request.getParameter("kubun")+"</p>");
out.println("<p>Message is "+request.getParameter("msg")+"</p>");
out.println("<p>SysID is "+request.getParmeter("SysID")+"</p>");
out.println("</body></html>");
}
//Clean up resources
public void destroy() {
}
}
I have thought it for a long time,but I still understand why Servlet can't
receive right result.Why I can't get the result of SysID,kubun and msg?
Any idea will be appreciated!
Thanks!!!
Edward
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