2016-12-14 178 views
0

,數據沒有傳入數據庫。我使用phpMyadmin。當提交表單時數據庫中沒有數據時使用servlet提交

這是它提交表單時顯示的內容。 我不知道錯誤在哪裏。

14-Dec-2016 17:37:54.895 WARNING [http-nio-8084-exec-146] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [YIP] appears to have started a thread named [Abandoned connection cleanup thread] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread: 
java.lang.Object.wait(Native Method) 
java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:135) 
com.mysql.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:43) 
14-Dec-2016 17:37:55.398 INFO [http-nio-8084-exec-146] org.apache.catalina.startup.HostConfig.undeploy Undeploying context [/YIP] 
14-Dec-2016 17:37:55.438 INFO [http-nio-8084-exec-153] org.apache.catalina.startup.HostConfig.deployDescriptor Deploying configuration descriptor C:\Users\user\AppData\Roaming\NetBeans\8.1\apache-tomcat-8.0.27.0_base\conf\Catalina\localhost\YIP.xml 
14-Dec-2016 17:37:55.656 INFO [http-nio-8084-exec-153] org.apache.jasper.servlet.TldScanner.scanJars At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time. 
14-Dec-2016 17:37:55.665 INFO [http-nio-8084-exec-153] org.apache.catalina.startup.HostConfig.deployDescriptor Deployment of configuration descriptor C:\Users\user\AppData\Roaming\NetBeans\8.1\apache-tomcat-8.0.27.0_base\conf\Catalina\localhost\YIP.xml has finished in 227 ms 
14-Dec-2016 17:37:55.691 INFO [http-nio-8084-exec-147] org.apache.catalina.util.LifecycleBase.start The start() method was called on component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/YIP]] after start() had already been called. The second call will be ignored. 

這是我的表格:

<%@page contentType="text/html" pageEncoding="UTF-8"%> 
<!DOCTYPE html> 
<html> 
<head> 
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 
    <title>Maklumat Sekolah</title> 
</head> 
<body> 
    <header style="height: 15%"> 
     <h1 style="text-align: center">Young Innovate</h1> 
    </header> 
    <div> 
    <link rel="stylesheet" type="text/css" href="pendaftaran2.css"/> 
    <form class="form-3" name="frmsekolah" action="SekolahServlet" method="POST"> 
     <h2 style="text-align: center">Kemaskini Maklumat Sekolah</h2> 
     <table border="0"> 
      <tbody> 
      <tr> 
       <td>Id Sekolah :</td> 
       <td><input type="text"id="sekolahid" name="sekolahid" size="3"/></td> 
      </tr> 
      <tr> 
       <td>Nama Sekolah :</td> 
       <td><input type="text" id="snama" name="snama" size="30"/></td> 
      </tr> 
      <tr> 
       <td>Alamat Sekolah :</td> 
       <td><input type="text" id="salamat" name="salamat" size="50"/></td> 
      </tr> 
      <tr> 
       <td>No.Telefon Sekolah :</td> 
       <td><input type="text" id="stel" name="stel" size="11"/></td> 
      </tr> 
      <tr> 
       <td>Emel Sekolah :</td> 
       <td><input type="text" id="semel" name="semel" size="30"/></td> 
      </tr> 
      <tr> 
       <td><input type="hidden" name="action" value="edit"/></td> 
      </tr> 
      <tr> 
        <td class="button"> 
         <button type="submit" name="submit" value="Submit"/>Submit 
        </td> 
       </tr> 
     </tbody> 
     </table> 
    </form> 
    </div> 
</body> 
</html> 

這是我的servlet:

package com.controller; 

import java.io.IOException; 
import java.io.PrintWriter; 
import java.text.ParseException; 

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

import com.dao.SekolahDao; 
import com.model.Sekolah; 
public class SekolahServlet extends HttpServlet { 
private static String INSERT = "/sekolahform.jsp"; 
private static String EDIT = "/editSekolah.jsp"; 
private static String LIST_SEKOLAH = "/listSekolah.jsp"; 
private SekolahDao dao; 

public SekolahServlet() throws ClassNotFoundException{ 
    super(); 
    dao = new SekolahDao(); 
} 

@Override 
protected void doGet(HttpServletRequest request, HttpServletResponse response) 
     throws ServletException, IOException{ 
    String forward = ""; 
    String action = request.getParameter("action"); 

    if (action.equalsIgnoreCase("delete")) { 
     String sekolahid = request.getParameter("sekolahid"); 
     dao.deleteSekolah(sekolahid); 
     forward = LIST_SEKOLAH; 
     request.setAttribute("sekolah",dao.getAllUsers()); 
    } 
    else if (action.equalsIgnoreCase("edit")) { 
     forward = EDIT; 
     String sekolahid = request.getParameter("sekolahid"); 
     Sekolah sekolahs = dao.getUserById(sekolahid); 
     request.setAttribute("sekolah", sekolahs); 
    } 
    else if (action.equalsIgnoreCase("listSekolah")){ 
     forward = LIST_SEKOLAH; 
     request.setAttribute("sekolah", dao.getAllUsers()); 
    } 
    else if (action.equalsIgnoreCase("insert")){ 
     forward = INSERT; 
    } 

    RequestDispatcher view = request.getRequestDispatcher(forward); 
    view.forward(request, response); 
} 
@Override 
protected void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException { 

    String action = request.getParameter("action"); 

    Sekolah sekolahs = new Sekolah(); 
    sekolahs.setSekolahid(request.getParameter("sekolahid")); 
    sekolahs.setSnama(request.getParameter("snama")); 
    sekolahs.setSalamat(request.getParameter("salamat")); 
    sekolahs.setStel(Integer.parseInt(request.getParameter("stel"))); 
    sekolahs.setSemel(request.getParameter("semel")); 


    if (action.equalsIgnoreCase("edit")) 
    { 
     dao.updateSekolah(sekolahs); 
    } 
    else 
    { 
     dao.addSekolah(sekolahs); 
    } 

    RequestDispatcher view = request.getRequestDispatcher(LIST_SEKOLAH); 
    request.setAttribute("sekolah", dao.getAllUsers()); 
    view.forward(request, response); 
} 
} 

這是我的DAO

package com.dao; 
import java.sql.Connection; 
import java.sql.PreparedStatement; 
import java.sql.ResultSet; 
import java.sql.SQLException; 
import java.sql.Statement; 

import java.util.ArrayList; 
import java.util.List; 
import com.model.Sekolah; 
import com.controller.SekolahServlet; 
import com.util.DBConnection; 
public class SekolahDao { 
private Connection connection; 

public SekolahDao() throws ClassNotFoundException{ 
    connection = DBConnection.getConnection(); 
} 

public void addSekolah(Sekolah sekolahs) { 
    try { 
     PreparedStatement preparedStatement = connection 
       .prepareStatement("insert into sekolah(sekolahid, snama, salamat, stel, semel) values (?, ?, ?, ?, ?)"); 
     //Parameter start with 1 
     preparedStatement.setString(1, sekolahs.getSekolahid()); 
     preparedStatement.setString(2, sekolahs.getSnama()); 
     preparedStatement.setString(3, sekolahs.getSalamat()); 
     preparedStatement.setInt(4, sekolahs.getStel()); 
     preparedStatement.setString(5, sekolahs.getSemel()); 
     preparedStatement.executeUpdate(); 

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

public void deleteSekolah(String sekolahid) { 
    try { 
     PreparedStatement preparedStatement = connection 
       .prepareStatement("delete from sekolah where sekolahid=?"); 
     //Parameters start with 1 
     preparedStatement.setString(1, sekolahid); 
     preparedStatement.executeUpdate(); 

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

public void updateSekolah(Sekolah sekolahs) { 
    try { 
     PreparedStatement preparedStatement = connection 
       .prepareStatement("update sekolah set snama=?, salamat=?, stel=?, semel=? " + "where sekolahid=?"); 
     //Parameter start with 1 

     preparedStatement.setString(1, sekolahs.getSnama()); 
     preparedStatement.setString(2, sekolahs.getSalamat()); 
     preparedStatement.setInt(3, sekolahs.getStel()); 
     preparedStatement.setString(4, sekolahs.getSemel()); 
     preparedStatement.setString(5, sekolahs.getSekolahid()); 
     preparedStatement.executeUpdate(); 

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

public List<Sekolah> getAllUsers() { 
    List<Sekolah> sekolah = new ArrayList<Sekolah>(); 
    try { 
     Statement statement = connection.createStatement(); 
     ResultSet rs = statement.executeQuery("select * from sekolah"); 
     while (rs.next()) { 
      Sekolah sekolahs = new Sekolah(); 
      sekolahs.setSekolahid(rs.getString("sekolahid")); 
      sekolahs.setSnama(rs.getString("snama")); 
      sekolahs.setSalamat(rs.getString("salamat")); 
      sekolahs.setStel(rs.getInt("stel")); 
      sekolahs.setSemel(rs.getString("semel")); 
      sekolah.add(sekolahs); 
     } 
    } catch (SQLException e) { 
     e.printStackTrace(); 
    } 
    return sekolah; 
} 

public Sekolah getUserById (String sekolahid) { 
    Sekolah sekolahs = new Sekolah(); 
    try { 
     PreparedStatement preparedStatement = connection.prepareStatement("select * from sekolah where sekolahid=?"); 
     preparedStatement.setString(1, sekolahid); 
     ResultSet rs = preparedStatement.executeQuery(); 

     while (rs.next()){ 
      sekolahs.setSekolahid(rs.getString("sekolahid")); 
      sekolahs.setSnama(rs.getString("snama")); 
      sekolahs.setSalamat(rs.getString("salamat")); 
      sekolahs.setStel(rs.getInt("stel")); 
      sekolahs.setSemel(rs.getString("semel")); 

     } 
    }catch (SQLException e) { 
     e.printStackTrace(); 
    } 
    return sekolahs; 
}} 
+2

我們需要看代碼 –

回答

0

如果沒有適當的代碼是不可能的解決這個問題...

0

這似乎是原因。

14-Dec-2016 17:37:55.691 INFO [http-nio-8084-exec-147] org.apache.catalina.util.LifecycleBase.start The start() method was called on component StandardEngine[Catalina].StandardHost[localhost].StandardContext[/YIP]] after start() had already been called. The second call will be ignored.

所以被稱爲兩次start()方法似乎是原因。正如穆克什所說,沒有代碼,我們不能提供更多的幫助。