如何把servlet里的变量传递给一个jsp页面呢？

先放入session，再在jsp页面中到session里面去取

解决方案 »

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或者利用查询字符串kkkk.jsp?accountNumber=XXXXXservlet:
response.sendRedirect("kkkk.jsp?accountNumber=XXXXX");jsp:
String accountNumber =request.getParameter("accountNumber");
如果是登录验证信息的话就只好放session里了，如果是一般信息可以根据作用域范围考虑放request里。在servlet里面 session.setAttribute()，在页面上session.getAttribute()。
response.sendDirect("http://..servlets/abcServlet/abc/jsp?abc="+accountNumber;);
你可以将这个值放到pagecontext.request,session中，这些jsp页面全可以取到
ServletContext sc = getServletContext();
String url = "jsp url";
RequestDispatcher rd = sc.getRequestDispatcher(url);
rd.forward(request, response);在doPost里转发请求
很多方法，DOPOST，DOGET，SESSION等等~看你自己决定
wingtrace(暮寒.烟灰.风化物) 答得好！！
最好不要redirect，redirect后session的内容全部消失。
servlet:
response.sendRedirect("kkkk.jsp?accountNumber=XXXXX");jsp:
String accountNumber =request.getParameter("accountNumber");或者你用对象分发技术  用 RequestDispatcher的 forward() or  include() 都行.......
可能是我们没说清楚，现在把代码贴出来，大家帮忙看看：
Balance.jsp：<HEAD>
<TITLE>Your Balance</TITLE>
<BODY><jsp:useBean id="regularCustomer"
             class="MVCBankAccount.BankCustomer"
             scope="request"/>

<TABLE BORDER=5 ALIGN="CENTER">
  <TR><TH CLASS="TITLE">
      Your Balance</TABLE><P><table width="400" border="1"ALIGN="CENTER">
  <tr>
    <th><div align="left">Account Name</div></th>
    <td><jsp:getProperty name="regularCustomer" property="name"/></td>
  </tr>
  <tr>
    <th><div align="left">Account Number</div></th>
    <td><jsp:getProperty name="regularCustomer" property="accountNumber"/></td>
  </tr>
  <tr>
    <th><div align="left">My Balance</div></th>
    <td>$<jsp:getProperty name="regularCustomer" property="totalBalance"/></td>
  </tr>
</table><br><br> <table ALIGN="CENTER">
  <tr>
    <form align="center" name="viewdetailForm" action="/servlet/MVCBankAccount/ShowBalance.java" method="post">
    <td ALIGN="CENTER"><input name="action" type="hidden" value="<%=regularCustomer.getAccountNumber()%>"></td>
    <td ALIGN="CENTER"><input name="viewregulardetail" type="submit" value="View Detail"></td>
</form>
  </tr>
</table--></BODY>
</HTML>
ShowBalance.java：package MVCBankAccount;import java.lang.*;
import javax.servlet.*;
import javax.servlet.http.*;public class ShowBalance extends HttpServlet {
private static final String CONTENT_TYPE = "text/html; charset=GBK";

    //Clean up resources
    public void destroy() {
    }

    //Process the HTTP Get request
    public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, java.io.IOException {
     try {
     processRequest(request, response);
     } catch (ClassNotFoundException classfinding){
     System.out.println("classfinding="+classfinding);
     }
}

    //Initialize global variables
    public void init() throws ServletException {
    }

protected void processRequest(HttpServletRequest request,HttpServletResponse response)
throws ServletException, java.io.IOException, ClassNotFoundException {
String address = "";
String action = "", accountNumberTemp = "";
action = request.getParameter("action");
BankCustomer customer = new BankCustomer();

customer.getCustomer(request.getParameter("id"), request.getParameter("password"));

if (action.equals("INDEX")) {
if (customer == null) {
address = "/MVCBankAccount/UnknownCustomer.jsp";
} else {
address = "/MVCBankAccount/NormalBalance.jsp";
request.setAttribute("regularCustomer", customer);
}
}

RequestDispatcher dispatcher = request.getRequestDispatcher(address);
dispatcher.forward(request, response);
}
}我现在要把Balance.jsp里的AccountNumber通过regularCustomer.getAccountNumber()提交到ShowBalance.java里，然后再把这个AccountNumber得知传递到另外一个ShowDetail.jsp的页面里。问题是不知道如何在ShowBalance.java里修改代码，以及在ShowDetail.jsp接收它。多谢各位高手帮忙啊！
用RequestDispatcher类。
在JSP中写：
request.setAttribute(变量名,变量值);
RequestDispatcher rd = request.getRequestDispatcher(jspURL);
rd.forward(request,response);在JSP中调用request.getAttribute(变量名);
Thanks a lot. I have solve this problem successfully. Any way, I will give  to every pepole.