Struts获取不到表单提交过来的数据？

Question

我是使用Struts实体提交。Form ，配置，还有实体类我都检查感觉没问题。可就是获取不到表单数据。请各位高手帮下小弟。
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Answer 1

form 里面用的是实体类吧，例如
private Example item=new Example();
...（setter\getter方法）
你的提交页面里面的数据的name属性值要写成：name="item.属性值"(属性值是Example类的属性)这样才能把输入的数据保存到Form实体类中 

Answer 2

form里面用实体类作为对象，实例名要小写开头，必须与jsp页面统一。。实体类是自动生成的吗？注意struts是自动找getXxx（）进行填充。。

Answer 3

页面上的提交Action和属性名要是没问题，就是配置错误。你提交的是什么东西？值？文件？还是什么？

Answer 4

Form
package com.java.form;import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;import com.java.dto.Users;public class UsersForm extends ActionForm {
Users users = new Users();
public ActionErrors validate(ActionMapping mapping,
HttpServletRequest request) {
return null;
}
public void reset(ActionMapping mapping, HttpServletRequest request) {
}
public Users getUsers() {
return users;
}
public void setUsers(Users users) {
this.users = users;
}
}

Answer 5

实体类
package com.java.dto;import java.io.Serializable;
import java.util.HashSet;
import java.util.Set;public class Users implements Serializable {
public Users() { }
public Users(String userName, String passWord) {
this.username = userName;
this.password = passWord;
}
public Users(int userId, String userName, String passWord) {
this.userId = userId;
this.username = userName;
this.password = passWord;
}
private int userId;      //用户ID
private String username; //用户名
private String password; //密码   
private Set users = new HashSet(0);
public int getUserId() {
return userId;
}
public void setUserId(int userId) {
this.userId = userId;
}
public String getUserName() {
return username;
}
public void setUserName(String username) {
this.username = username;
}
public String getPassWord() {
return password;
}
public void setPassWord(String password) {
this.password = password;
}
public Set getUsers() {
return users;
}
public void setUsers(Set users) {
this.users = users;
}
}

Answer 6

Action
package com.java.Action;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 com.java.dto.Users;
import com.java.dtoimp.UserLoginDaoImp;
import com.java.form.UsersForm;
public class LoginAction extends Action {
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
UsersForm UsersForm = (UsersForm) form;// TODO Auto-generated method stub
UserLoginDaoImp imp = new UserLoginDaoImp();
String uname = UsersForm.getUsers().getUserName();
String pwd = UsersForm.getUsers().getPassWord();
Users user = new Users(uname,pwd);
Users user2 = imp.selectUsers(user);
if(uname.equals(user2.getUserName()) && pwd.equals(user2.getPassWord())){
request.setAttribute("uname",user2);
return mapping.findForward("succeed");
}
else{
request.setAttribute("message", "登录失败！用户名或密码无效");
return mapping.findForward("defeated");
}
}
}

Answer 7

form表单
直接写
String password;
String username;
这两个，应该没有问题
从来没有用过你的用法，struts2中可以，不知道1中是否可以
楼主可以试一下

Answer 8

我想知道你的jsp里面是怎么写的？
<html:form>里面，用户名，密码的property是啥

Answer 9

解决：
FormBean不要写User属性。删掉。
然后添加String username,String password,添加getter,setter
在jsp里面：
<html:text property="username" />
<html:password property="password" />然后就ok了

Answer 10

配置文件
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN" "http://struts.apache.org/dtds/struts-config_1_3.dtd"><struts-config>
  <form-beans >
    <form-bean name="UsersForm" type="com.java.form.UsersForm" />  </form-beans>  <global-exceptions />
  <global-forwards />
  <action-mappings >
    <action
      attribute="UsersForm"
      input="/login_form.jsp"
      name="UsersForm"
      path="/LoginAction"
      scope="request"
      type="com.java.Action.LoginAction" parameter="user" >
      <forward name="succeed" path="index.jsp" />
      <forward name="defeated" path="index.jsp" />
      </action>  </action-mappings>  <message-resources parameter="com.yourcompany.struts.ApplicationResources" />
</struts-config>

Answer 11

页面
<form action="/MyHouses/LoginAction.do" method="post" name="myForm" onsubmit="return login()">
<table align="center">
<tr>
<td colspan="2" align="center">

</td>
</tr>
<tr>
<td>用户登陆：</td>
<td>&nbsp;</td>
</tr>
<tr>
<td colspan="2"><hr/></td>
</tr>
<tr>
<td>用户名：</td>
<td><input type="text" name="user.username"></td>
</tr>
<tr>
<td>密码：</td>
<td><input type="password" name="user.password"></td>
</tr>
<tr>
<td>
<input type="hidden" name="sign" value="login"/>
<input type="submit" value="登陆" class="btn">
</td>
</tr>
</table>
</form>

Answer 12

我用的是Struts里面的实体提交，以前成功过！！

Answer 13

form  里面的 
Users users = new Users();
改成->Users user = new Users();或者页面->
<td>用户名：</td>
<td><input type="text" name="users.username"></td>
</tr>
<tr>
<td>密码：</td>
<td><input type="password" name="users.password"></td>记得name好像应该和FORM里实例名一样，不是类名~

Answer 14

还是错误
java.lang.StringIndexOutOfBoundsException: String index out of range: 0
at java.lang.String.charAt(String.java:687)
at org.hibernate.mapping.Column.setName(Column.java:61)
at org.hibernate.cfg.HbmBinder.bindColumns(HbmBinder.java:1070)
at org.hibernate.cfg.HbmBinder.bindColumnsOrFormula(HbmBinder.java:1528)
at org.hibernate.cfg.HbmBinder.bindSimpleValue(HbmBinder.java:1124)
at org.hibernate.cfg.HbmBinder.bindSimpleId(HbmBinder.java:391)
at org.hibernate.cfg.HbmBinder.bindRootPersistentClassCommonValues(HbmBinder.java:334)
at org.hibernate.cfg.HbmBinder.bindRootClass(HbmBinder.java:273)
at org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:144)
at org.hibernate.cfg.Configuration.add(Configuration.java:669)
at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:504)
at org.hibernate.cfg.Configuration.addResource(Configuration.java:566)
at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:1587)
at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:1555)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1534)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1508)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1428)
at com.java.util.HibernateSessionFactory.<clinit>(HibernateSessionFactory.java:30)
at com.java.dtoimp.UserLoginDaoImp.selectUsers(UserLoginDaoImp.java:16)
at com.java.Action.LoginAction.execute(LoginAction.java:21)
at org.apache.struts.chain.commands.servlet.ExecuteAction.execute(ExecuteAction.java:58)
at org.apache.struts.chain.commands.AbstractExecuteAction.execute(AbstractExecuteAction.java:67)
at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:304)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:868)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:663)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:619)
%%%% Error Creating SessionFactory %%%%org.hibernate.InvalidMappingException: Could not parse mapping document from resource com/java/dto/HouseInfo.hbm.xml
at org.hibernate.cfg.Configuration.addResource(Configuration.java:569)
at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:1587)
at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:1555)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1534)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1508)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1428)
at com.java.util.HibernateSessionFactory.rebuildSessionFactory(HibernateSessionFactory.java:69)
at com.java.util.HibernateSessionFactory.getSession(HibernateSessionFactory.java:53)
at com.java.dtoimp.UserLoginDaoImp.selectUsers(UserLoginDaoImp.java:16)
at com.java.Action.LoginAction.execute(LoginAction.java:21)
at org.apache.struts.chain.commands.servlet.ExecuteAction.execute(ExecuteAction.java:58)
at org.apache.struts.chain.commands.AbstractExecuteAction.execute(AbstractExecuteAction.java:67)
at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:304)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:868)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:663)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:619)
Caused by: org.hibernate.DuplicateMappingException: Duplicate class/entity mapping com.java.dto.HouseInfo
at org.hibernate.cfg.Mappings.addClass(Mappings.java:118)
at org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:145)
at org.hibernate.cfg.Configuration.add(Configuration.java:669)
at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:504)
at org.hibernate.cfg.Configuration.addResource(Configuration.java:566)
... 34 morejava.lang.NullPointerException
at com.java.dtoimp.UserLoginDaoImp.selectUsers(UserLoginDaoImp.java:21)
at com.java.Action.LoginAction.execute(LoginAction.java:21)
at org.apache.struts.chain.commands.servlet.ExecuteAction.execute(ExecuteAction.java:58)
at org.apache.struts.chain.commands.AbstractExecuteAction.execute(AbstractExecuteAction.java:67)
at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:304)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:868)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:663)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:619)

Answer 15

页面好像就是上面说的那个问题，加个点应该就能搞定，name里是form的属性名，再点出其中值的名称。可我一般是这么显示，忘记了能不能提交进去。
其实就把值提交过去就完了，这些页面提交的东西基本全要验证，等验证完了该放哪放哪多好。另外就是你的Users不会是hibernate的实体类吧？你就这么用它接收页面参数，就不拍页面值改名？

Answer 16

刚把hibernate学完，把以前用struts做的一个小项目加入hibernate 才做到登录就出了好多错误。
 现在脑袋好晕。不晓的从哪里找起。