struts的错误

mimi5211 2009-03-05 12:47:57
struts的错误：
type Exception report

message

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

exception

org.apache.jasper.JasperException: An exception occurred processing JSP page /success.jsp at line 12

9: <meta http-equiv="content-type" content="text/html;charset=UTF-8" />
10: </head>
11: <body>
12: 鎮ㄥソ锛屾杩庢偍锛� <bean:write name="loginbean" property="username"></bean:write>
13:
14: </body>
15: </html>


Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:524)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:417)
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)
org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1085)
org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:398)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:241)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)


root cause

javax.servlet.ServletException: javax.servlet.jsp.JspException: Cannot find bean: "loginbean" in any scope
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:850)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:779)
org.apache.jsp.success_jsp._jspService(success_jsp.java:86)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
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)
org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1085)
org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:398)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:241)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)


root cause

javax.servlet.jsp.JspException: Cannot find bean: "loginbean" in any scope
org.apache.struts.taglib.TagUtils.lookup(TagUtils.java:935)
org.apache.struts.taglib.bean.WriteTag.doStartTag(WriteTag.java:225)
org.apache.jsp.success_jsp._jspx_meth_bean_005fwrite_005f0(success_jsp.java:105)
org.apache.jsp.success_jsp._jspService(success_jsp.java:75)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
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)
org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1085)
org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:398)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:241)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)


note The full stack trace of the root cause is available in the Apache Tomcat/6.0.14 logs.

=========================================================================
大家帮看看是什么原因啊，这是我的
ACTION：
package login.action;

import java.sql.ResultSet;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import login.bean.ConnectDB;
import login.form.LoginForm;
import loginin.bean.LoginBean;
public class LoginAction extends Action {


public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {


String userid = request.getParameter("userid");
String psw = request.getParameter("password");
if(userid == null || psw == null || userid.equals("") || psw.equals(""))
{

//request.setAttribute("error","1");
//response.sendRedirect("error.jsp");
return mapping.findForward("fail");

}
else
{
try
{
String sql = "select * from userinfo where userid = '"+userid+"' and password = '"+psw+"'";

ConnectDB db=new ConnectDB();
ResultSet rs = db.executeQuery(sql);
if(rs != null && rs.next())
{
while(rs.next())
{
String uuserid=rs.getString("userid");
String username=rs.getString("username");
String password=rs.getString("password");

request.setAttribute("userid",uuserid);
request.setAttribute("username",username);
request.setAttribute("password",password);
System.out.println(username);

LoginBean loginbean=new LoginBean();
loginbean.getUserid();
loginbean.getUsername();
loginbean.getPassword();
System.out.println(username);
request.setAttribute("loginbean",loginbean);

}

return mapping.findForward("success");
}
else
{
request.setAttribute("error","2");
response.sendRedirect("error.jsp");
}
}
catch(Exception e)
{
request.setAttribute("error","3");
response.sendRedirect("error.jsp");
e.printStackTrace();
}
}
// TODO Auto-generated method stub
return super.execute(mapping, form, request, response);
}


}
JSP：
<%@page contentType="text/html; charset=UTF-8"%>
<%@taglib uri="/WEB-INF/struts-html.tld" prefix="html"%>
<%@taglib uri="/WEB-INF/struts-bean.tld" prefix="bean"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>信息</title>
<meta http-equiv="content-type" content="text/html;charset=UTF-8" />
</head>
<body>
您好，欢迎您！ <bean:write name="loginbean" property="username"></bean:write>

</body>
</html>
...全文
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flylovejings 2009-03-05
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while(rs.next())

{

String uuserid=rs.getString("userid");

String username=rs.getString("username");

String password=rs.getString("password");

    LoginBean loginbean = new LoginBean();

    //封装属性

                loginbean.setUserid(uuserid);

                loginbean.setUsername(username);

                loginbean.setPassword(password);

                System.out.println("loginbean:"+username);

           //把查出来的值放在request里    

           request.setAttribute("loginbean",loginbean);

在jsp中 ${requestScope.loginbena.username}
huangan0301 2009-03-05
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while(rs.next())
{
String uuserid=rs.getString("userid");
String username=rs.getString("username");
String password=rs.getString("password");

request.setAttribute("userid",uuserid);
request.setAttribute("username",username);
request.setAttribute("password",password);
System.out.println(username);

LoginBean loginbean=new LoginBean();
loginbean.getUserid();
loginbean.getUsername();
loginbean.getPassword();
System.out.println(username);
request.setAttribute("loginbean",loginbean);

}
上面的LoginBean刚new 出来，怎么就开始get属性了~~~应该是set吧~~~其它的代码我没看~~我觉得这要改为：
LoginBean loginbean=new LoginBean();
loginbean.setUserid(userid);
loginbean.setUsername(username);
loginbean.setPassword(password);
System.out.println(username);
request.setAttribute("loginbean",loginbean);
qingkongxiaoyang 2009-03-05
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<bean:write name="loginbean" property="username"> </bean:write>

利用<bean:write>输出的对象必须存放在四种属性范围之中．
不然的话，它根本找不到loginbean这个属性．
只是我的看法，你可以试试．．．
ouyangxiaokang6 2009-03-05
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Cannot find bean: "loginbean" in any scope
你创建的formbean丢失了，或者没有创建。仔细检查一下，要看struts的源码呀，我项目遇到
过一次，至今都不知道原因。
mimi5211 2009-03-05
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public void setUserid(int userid) {
this.userid = userid;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
有啊
niuxinlong 2009-03-05
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loginbean 里没有setUsername啊
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