极其隐晦的问题，高手来看!

这是用eclipse写的工程，每个文件写的都没错，贴不上来呀

单步调试，　要不在程序中+多个System.out.println()

以下是主要的代码：
<%@ page contentType="text/html; charset=UTF-8" language="java" import="java.sql.*,java.io.*;" errorPage="" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>用户注册</title>
<style type="text/css">

</style></head><body>
<form name="RegisterForm" method="post" action="regist.do">
<div align="center">
  <table width="100%" bgColor=#fef7e3>    <tr>
      <td width="433"><div align="right">用户名<span class="STYLE1">*</span></div></td>
      <td width="494"><label>
        <div align="left">
          <input name="username" type="text" size="20" maxlength="20">
          </div>
      </label></td>
    </tr>
    <tr>
      <td width="433"><div align="right">密码<span class="STYLE1">*</span></div></td>
      <td><div align="left">
        <input name="userpsw" type="password" size="20" maxlength="20">
      </div></td>
    </tr>
    <tr>
      <td width="433"><div align="right">确认密码<span class="STYLE1">*</span></div></td>
      <td><div align="left">
        <input name="reuserpsw" type="password" size="20" maxlength="20">
      </div></td>
    </tr>
    <tr>
      <td width="433"><div align="right">电子邮件<span class="STYLE1">*</span></div></td>
      <td><div align="left">
        <input name="useremail" type="text" size="20" maxlength="50">
      </div></td>
    </tr>  </table>
  <input type="submit" name="Submit" value="注册">
  <input name="Submit2" type="reset" value="重置">
</div>
</form>
</body>
</html>
/**********************************************************
************************************************************
*************************************************************************/
//Created by MyEclipse Struts
// XSL source (default): platform:/plugin/com.genuitec.eclipse.cross.easystruts.eclipse_3.8.4/xslt/JavaClass.xslpackage footman;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 javax.servlet.ServletContext;
import javax.sql.DataSource;
import java.sql.ResultSet;
import java.sql.Statement;
import java.sql.SQLException;
import java.sql.Connection;
/**
* MyEclipse Struts
* Creation date: 12-06-2005
*
* XDoclet definition:
* @struts:action path="/regist" name="RegisterForm" scope="request" validate="true"
* @struts:action-forward name="index.jsp" path="/index.jsp"
*/
public class RegisterAction extends Action { // --------------------------------------------------------- Instance Variables // --------------------------------------------------------- Methods /**
* Method execute
* @param mapping
* @param form
* @param request
* @param response
* @return ActionForward
*/
public ActionForward execute(
ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response) {
RegisterForm RegisterForm = (RegisterForm) form;

//??????
RegisterForm registerform = (RegisterForm)form;
String username = registerform.getUsername();
String userpsw = registerform.getUserpsw();
String useremail = registerform.getUseremail();
System.out.println("1");
System.out.println(userpsw);
System.out.println(useremail);
//???????
ServletContext context = servlet.getServletContext();
DataSource datasource = (DataSource)context.getAttribute("mysqlds");
String sql = "insert into users(username,userpsw,useremail) values('" + username+ "','" + userpsw+ "','" + useremail+ "')";

try{
Connection conn = datasource.getConnection();
Statement stmt = conn.createStatement();
int i = stmt.executeUpdate(sql);
stmt.close();
conn.close();
if(i == 1){
return (mapping.findForward("success"));
}
}catch(SQLException e){
e.printStackTrace();
}
return (mapping.findForward("failed"));
}}
/************************************************************************/
//Created by MyEclipse Struts
// XSL source (default): platform:/plugin/com.genuitec.eclipse.cross.easystruts.eclipse_3.8.4/xslt/JavaClass.xslpackage footman;import javax.servlet.http.HttpServletRequest;import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;/**
* MyEclipse Struts
* Creation date: 12-06-2005
*
* XDoclet definition:
* @struts:form name="RegisterForm"
*/
public class RegisterForm extends ActionForm { // --------------------------------------------------------- Instance Variables
private String username = null;
private String userpsw = null;
private String reuserpsw = null;
private String useremail = null;
// --------------------------------------------------------- Methods

public void setUsername(String username){
this.username = username;
}
public void setUserpsw(String userpsw){
this.userpsw = userpsw;
}
public void setReuserpsw(String reuserpsw){
this.reuserpsw = reuserpsw;
}
public void setUseremail(String useremail){
this.useremail = useremail;
}
public String getUsername(){
return this.username;
}
public String getUserpsw(){
return this.userpsw;
}
public String getReuserpsw(){
return this.reuserpsw;
}
public String getUseremail(){
return this.useremail;
}
}

估计是出异常了吧，为什么不设置错误页面，而只是用try...catch捕捉?

没有出异常，如果错误就return (mapping.findForward("failed"));

你的formbean中的口令字段和action中的引用的好象不同,是不是由此引起的呢?

查一下 conn,stmt是否为努null

调试易

极其隐晦的问题，高手来看!

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