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Exception 从特定列提取时出现Exhausetd ResultSet错误

exception servlets

Exception 从特定列提取时出现Exhausetd ResultSet错误,exception,servlets,servletexception,ojdbc,Exception,Servlets,Servletexception,Ojdbc,在我的项目中，我正在创建一个取消帐户功能，以便从用户表中删除帐户。用户表名为newuser。cancelaccountjsp如下所示： <%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w

在我的项目中，我正在创建一个取消帐户功能，以便从用户表中删除帐户。用户表名为
newuser
。
cancelaccount
jsp如下所示：

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
 <head>
   <style type="text/css">
body {
background-image: url("shocked.jpg");
background-repeat:no-repeat;
background-position: top right;
 }
p
 {
    font-family: serif;
    font-weight: bold;
    color: blue;
    size: 5px;
    text-align: center;
 }

 </style>
 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
 <title>Insert title here</title>
 </head>
 <body>

 <form action="Cancelaccount" name="cancelaccount">
 <p>Are you sure to cancel account?</p>
 <p>If yes please retype the password</p>
 <p><input type="password" align="middle" name="password"></input></p>
 <input type="submit" value="Cancel Account"></input>
 <p>Else click <a href="UserHome.jsp">here</a></p> 
 </form>
 </body>
 </html>

DAO
功能代码为：

public void cancelaccount(Getset g)throws ClassNotFoundException,SQLException{
    //Delete a user from NEWUSER TABLE AND MEALDB TABLE
    Connection con=Dbconnection.getConnection();
    String userid=g.getuserid();
    PreparedStatement pstmt=con.prepareStatement("delete from mealdb where userid=?");
    pstmt.setString(1, userid);
    pstmt.executeUpdate();
    PreparedStatement pstmt1=con.prepareStatement("delete from newuser where userid=?");
    pstmt1.setString(1, userid);
    pstmt1.executeUpdate();
}
public String getregpasswordbyuserid(Getset g)throws ClassNotFoundException,SQLException{
    //GET PASSWORD BY USERID
    Connection con=Dbconnection.getConnection();
    String userid=g.getuserid();
    PreparedStatement pstmt=con.prepareStatement("select regpassword from newuser where userid=?");
    pstmt.setString(1, userid);
    ResultSet rs=pstmt.executeQuery();
    rs.next();
    String p=rs.getString(1);
    System.out.println(""+p);
    return p;

}
而
stacktrace
是：

    11:35:29,912 ERROR [STDERR] java.sql.SQLException: Exhausted Resultset
    11:35:29,912 ERROR [STDERR]     at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:125)
    11:35:29,912 ERROR [STDERR]     at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:162)
    11:35:29,912 ERROR [STDERR]     at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:227)
    11:35:29,912 ERROR [STDERR]     at oracle.jdbc.driver.OracleResultSetImpl.getString(OracleResultSetImpl.java:347)
    11:35:29,912 ERROR [STDERR]     at accessdb.Dao.getregpasswordbyuserid(Dao.java:245)
    11:35:29,912 ERROR [STDERR]     at Cancelaccount.doGet(Cancelaccount.java:39)
    11:35:29,912 ERROR [STDERR]     at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
    11:35:29,912 ERROR [STDERR]     at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    11:35:29,912 ERROR [STDERR]     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    11:35:29,912 ERROR [STDERR]     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    11:35:29,912 ERROR [STDERR]     at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
    11:35:29,912 ERROR [STDERR]     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    11:35:29,912 ERROR [STDERR]     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     11:35:29,912 ERROR [STDERR]    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
    11:35:29,912 ERROR [STDERR]     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
    11:35:29,912 ERROR [STDERR]     at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
    11:35:29,912 ERROR [STDERR]     at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
    11:35:29,912 ERROR [STDERR]     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
    11:35:29,912 ERROR [STDERR]     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
    11:35:29,912 ERROR [STDERR]     at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
    11:35:29,912 ERROR [STDERR]     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    11:35:29,912 ERROR [STDERR]     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241)
    11:35:29,912 ERROR [STDERR]     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
    11:35:29,912 ERROR [STDERR]     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:580) 
    11:35:29,912 ERROR [STDERR]     at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
    11:35:29,912 ERROR [STDERR]     at java.lang.Thread.run(Unknown Source)
在
DAO
s'
cancelaccount
函数中，我也从另一个表
mealdb
中删除了，因为
userid
字段是
newuser
中的
主键和
mealdb
中的
外键。我仔细地看了看，但找不到办法。谢谢。
尝试将getregpasswordbyuserid（）中的代码更改为


问题已经解决了。我刚刚更改了servlet代码，它就成功了。未成功获取会话中的用户ID值。工作守则是：


import getset.Getset;

import java.io.IOException;
import java.io.PrintWriter;

import java.sql.SQLException;

import accessdb.Dao;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class Cancelaccount extends HttpServlet {
    private static final long serialVersionUID = 1L;

    protected void doGet(HttpServletRequest request,
                         HttpServletResponse response) throws ServletException,
                                                              IOException {
        // TODO Auto-generated method stub
        Getset g = new Getset();
        Dao dao = new Dao();
        PrintWriter pw = response.getWriter();
        String password = request.getParameter("password");
        System.out.println("" + password);
        HttpSession session = request.getSession(true);
        String userid = (String)session.getAttribute("USERID");
        System.out.println("" + userid);
        /*  if(password.equals("") || password.equals(" "))
    {
    response.sendRedirect("UserHome.jsp");

    } */
        g.setuserid(userid);
        try {
            String password1 = dao.getpasswordbyuserid(g);
            System.out.println("" + password1);
            if (password1.equals(password)) {
                dao.cancelaccount(g);
                pw.println("<html>Your Account has been successfully cancelled from the system.<p>" +
                           "Click here to go to <a href=\"WelcomePage.jsp\">Start Page</a><html>");
                session.invalidate();

            } else {
                response.sendRedirect("UserHome.jsp");
            }


        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        }

    }
}



导入getset.getset；
导入java.io.IOException；
导入java.io.PrintWriter；
导入java.sql.SQLException；
导入accessdb.Dao；
导入javax.servlet.ServletException；
导入javax.servlet.http.HttpServlet；
导入javax.servlet.http.HttpServletRequest；
导入javax.servlet.http.HttpServletResponse；
导入javax.servlet.http.HttpSession；
公共类Cancelaccount扩展了HttpServlet{
私有静态最终长serialVersionUID=1L；
受保护的无效数据集（HttpServletRequest请求，
HttpServletResponse响应）抛出ServletException，
IOException{
//TODO自动生成的方法存根
Getset g=新的Getset（）；
Dao=新Dao（）；
PrintWriter pw=response.getWriter（）；
字符串密码=request.getParameter（“密码”）；
System.out.println（“+”密码）；
HttpSession session=request.getSession（true）；
String userid=（String）session.getAttribute（“userid”）；
System.out.println（“+userid”）；
/*if（password.equals（“”）| password.equals（“”）
{
sendRedirect（“UserHome.jsp”）；
} */
g、 setuserid（userid）；
试一试{
字符串password1=dao.getpasswordbyuserid（g）；
System.out.println（“+password1”）；
if（密码1.equals（密码））{
dao.取消账户（g）；
println（“您的帐户已成功从系统中取消。”+
“单击此处转到”）；
session.invalidate（）；
}否则{
sendRedirect（“UserHome.jsp”）；
}
}catch（classnotfounde异常）{
e、 printStackTrace（）；
}捕获（SQLE异常）{
e、 printStackTrace（）；
}
}
}

很抱歉，未使其运行！！PreparedStatement pstmt=con.prepareStatement（“从mealdb中删除，其中userid=？”，ResultSet.TYPE\u SCROLL\u不敏感，ResultSet.CONCUR\u可更新）；在getregpasswordbyuserid（）中也使用它，您的问题来自于我认为在任何地方都尝试过，但没有用！！：（让我们感谢@MaVRoSCy，感谢您毫无疑问的合作。

ResultSet rs=pstmt.executeQuery();
String p="";
while(rs.next()){
    p=rs.getString(1);
    System.out.println(""+p);
}
return p;



import getset.Getset;

import java.io.IOException;
import java.io.PrintWriter;

import java.sql.SQLException;

import accessdb.Dao;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class Cancelaccount extends HttpServlet {
    private static final long serialVersionUID = 1L;

    protected void doGet(HttpServletRequest request,
                         HttpServletResponse response) throws ServletException,
                                                              IOException {
        // TODO Auto-generated method stub
        Getset g = new Getset();
        Dao dao = new Dao();
        PrintWriter pw = response.getWriter();
        String password = request.getParameter("password");
        System.out.println("" + password);
        HttpSession session = request.getSession(true);
        String userid = (String)session.getAttribute("USERID");
        System.out.println("" + userid);
        /*  if(password.equals("") || password.equals(" "))
    {
    response.sendRedirect("UserHome.jsp");

    } */
        g.setuserid(userid);
        try {
            String password1 = dao.getpasswordbyuserid(g);
            System.out.println("" + password1);
            if (password1.equals(password)) {
                dao.cancelaccount(g);
                pw.println("<html>Your Account has been successfully cancelled from the system.<p>" +
                           "Click here to go to <a href=\"WelcomePage.jsp\">Start Page</a><html>");
                session.invalidate();

            } else {
                response.sendRedirect("UserHome.jsp");
            }


        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        }

    }
}