struts标签异常，求解！！弄了好半天了，我的毕业设计啊！急人啊！

Question

异常如下：
严重: Servlet.service() for servlet jsp threw exception
javax.servlet.jsp.JspException: Exception creating bean of class com.struts.formBean.BgLoginForm: {1}
at org.apache.struts.taglib.html.FormTag.initFormBean(FormTag.java:487)
at org.apache.struts.taglib.html.FormTag.doStartTag(FormTag.java:457)
at org.apache.jsp.BgLogin_jsp._jspService(BgLogin_jsp.java:156)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
at java.lang.Thread.run(Thread.java:595)
待会上代码。

Answer 1

http://topic.csdn.net/u/20090414/10/18a2bac8-e5fb-41a3-8fcd-3eccc9faa61b.html看这个帖子 跟你的问题一样。

Answer 2

 1.配置文件：
<form-bean name="bgloginForm" type="com.struts.formBean.BgLoginForm"></form-bean>
<action path="/bgLogin" type="com.struts.action.BgLoginAction" name="bgloginForm">
 <forward name="BgIndex" path="/BgIndex.jsp"></forward>   <forward name="BgLogin" path="/BgLogin.jsp"></forward  </action>
2. 
public class BgLoginForm extends ActionForm { private String yanzheng;
private String level;
private String name;
private String password;
private String verifycode2; @Override
public ActionErrors validate(ActionMapping mapping,
HttpServletRequest request) { ActionErrors errors = new ActionErrors(); if (name == null || name.equals("")) {
errors.add("name", new ActionMessage("bgLogin.error.name"));
} if (password == null || password.equals("")) {
errors.add("password", new ActionMessage("bgLogin.error.password"));
} if (yanzheng == null || yanzheng.equals("")) {
errors.add("yanzheng", new ActionMessage("bgLogin.error.yanzheng"));
} else if (!yanzheng.equals(verifycode2)) {
errors.add("yanzheng", new ActionMessage("bgLogin.error.yanzheng1"));
} request.setAttribute("bgLoginFormBean", this);
return errors;
}3.
BgLoginAction.java 
package com.struts.action;import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;import org.apache.struts.action.Action;
省略。
com.struts.formBean.BgLoginForm;public class BgLoginAction extends Action { @Override
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {

BgLoginForm bgLoginForm =(BgLoginForm)form;

String method =request.getParameter("method");
ActionErrors errors =new ActionErrors();
ActionForward forward =new ActionForward();
ServletContext context =this.servlet.getServletContext();

String password =bgLoginForm.getPassword();
String username=bgLoginForm.getName();
String level =bgLoginForm.getLevel();

HttpSession session =request.getSession(false);
if(session!=null){
session.invalidate();
}  

session =request.getSession(true);

if(method.equals("bg")){

TbManagerDAO tbManagerDAO=new TbManagerDAO();
TbManager tbManager =new TbManager();
    tbManager =tbManagerDAO.valid(username, password, level); 
if(tbManager!=null){
session.setAttribute("BgLogin", tbManager);
return mapping.findForward("BgIndex");/*登录成功，就进入后台管理页面*/
}
else {
errors.add(ActionErrors.GLOBAL_MESSAGE,new ActionMessage("bgLogin.message.failed"));
context.setAttribute("info1", "用户名或密码或权限选择不正确！");
return mapping.findForward("BgLogin"); /*登录失败，就重新进入登录页*/
}
}

    else if{省略。}
return null;
}
}4.
资资源文件
# page error
#=========================================================================
# login.jsp
bgLogin.page.title=\u767B\u5F55\u7A97\u53E3
bgLogin.page.name=\u7528\u6237\u540D
bgLogin.page.password=\u5BC6\u7801
bgLogin.page.yanzheng=\u9A8C\u8BC1\u7801
bgLogin.page.login=\u767B\u5F55

Answer 3

5 jsp页面：
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean"%> 
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html"%>
 <%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic"%>
<%@ taglib uri="http://struts.apache.org/tags-nested" prefix="nested"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
 <title>My JSP 'BgLogin.jsp' starting page</title>
<style>
<!--
body{
margin:0px;
text-align:center;
}
#container{text-align:center;
}
.div_a{height:100px;
}
.div_b{
width:500px;
height:400px;
background:url(images/td.jpg)
}
.div_b_a{
width: 500px;
height:120px; }.div_b_b_b{
width: 500px;
height:280px; 
}
-->
</style>  </head>
  <%String str=(String)this.getServletContext().getAttribute("info1");  %>
  
  <body bgcolor="#6aa276">
  
    <div id="container" align="center">
<div class="div_a">
</div>
<div class="div_b" align="center">
<div class="div_b_a"></div><div class="div_b_b_b" >
<html:form action="/bgLogin.do?method=bg" method="post">
<table>
<tr height="15">
<td>姓名：</td>
<td>
<logic:present name="bgLoginFormBean">
<html:text property="name" name="bgLoginFormBean"/>
</logic:present>
<logic:notPresent name="bgLoginFormBean">
<input type="text" name="name">
</logic:notPresent>
</td>
</tr><tr height="10">
<td>
</td>
<td>
<html:errors property="name"/>
</td>
</tr><tr height="15">
<td>密码：</td>
<td>
<logic:present name="bgLoginFormBean">
<html:text property="password" name="bgLoginFormBean"/>
</logic:present>
<logic:notPresent name="bgLoginFormBean">
<input type="password" name="password">
</logic:notPresent>
</td>
</tr><tr height="15">
<td>验证码：</td>
<td>
<%
int intmethod=(int)((((Math.random())*11))-1);
int intmethod2=(int)((((Math.random())*11))-1);
int intmethod3=(int)((((Math.random())*11))-1);
int intmethod4=(int)((((Math.random())*11))-1);
 String intsum =intmethod+""+intmethod2+intmethod3+intmethod4;
 //将得到的随机数进行连接
 %>
<logic:present name="bgLoginFormBean">
<html:text property="yanzheng" name="bgLoginFormBean"/>
</logic:present>
<logic:notPresent name="bgLoginFormBean">
<input type="text" name="yanzheng">
</logic:notPresent><!-- 设置隐藏域 |用来作验证对比 -->
<input type="hidden" name="verifycode2" value="<%=intsum%>">
<span>
<font size="+1" color="#FF0000">
<!-- 将图片名称与得到的随机数相同的图片显示到页面上 -->
<img alt="" src=num/<%=intmethod %>.gif>
<img alt="" src=num/<%=intmethod2 %>.gif>
<img alt="" src=num/<%=intmethod3 %>.gif>
<img alt="" src=num/<%=intmethod4 %>.gif>
</font>
</span>
</td>
</tr><tr height="15">
<td>
权 限:
</td>
<td>
<html:select property="level">
      <html:option value="0">系统管理员</html:option>
      <html:option value="1">用户管理员</html:option>
      <html:option value="2">房产管理员</html:option>
      <html:option value="3">合同管理员</html:option>
      
     
      </html:select>
      <html:errors property="level"/><br/>
</td>
</tr>

<tr height="15">
<td>
</td>
<td height="15">
<html:submit value="登录"/>
<html:button  property="bu" value="重置"></html:button>
</td>

</tr>
</table>
<!-- 错误点
 -->
 <html:errors property="org.apache.struts.action.GLOBAL_MESSAGE"/>
 
<br>
<%
if(str!=null){
getServletContext().removeAttribute("info1");
out.println("<font color='red'>"+str+"</font>");
}
 %>
 </html:form>
 
 
 </div>
 
 </div>
 
 </div>
 
 
  </body>
</html>