JDBC ODBC刪除查詢錯誤問題？

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我想從數據庫中刪除客戶的有關新聞紙而不是客戶的全部細節？一位顧客在他們的記錄中有多張紙，但我想從多張紙中刪除任何紙張。我是輸入客戶ID和選擇界河紙我想刪除感謝先進的幫助...JDBC ODBC刪除查詢錯誤問題？

enter code here: 
import java.awt.Container; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.sql.Connection; 
import java.sql.DriverManager; 
import java.sql.PreparedStatement; 
import java.sql.SQLException; 
import javax.swing.*; 

public abstract class delete_paper extends JFrame implements ActionListener 
{ 
JTextField textFieldId; 
JLabel l1; 
JLabel l3; 
JLabel l5; 
JLabel l6; 
    JComboBox combo; 
    String course[] = {"Navakal","SandhyaKal","Pudhari", 
     "MidDay","Inqlab","BusinessLine","MumbaiSamachar", 
     "GujrajSamachar","KarnatakMalla","Vartahar","PunyaNagari"}; 
JButton b2; 
Container c = getContentPane(); 
delete_paper() 
{ 
    super("Shree DattaDigambar Samarth"); 
    setBounds(140,250,777,555); 
    c.setLayout(null); 
    textFieldId = new JTextField();   
    l1 = new JLabel("New Customer Entry"); 
    l3 = new JLabel("Customer Name");  
    l5 = new JLabel("Paper"); 
      combo = new JComboBox(course); 
    l1.setBounds(10,10,340,20); 
    l3.setBounds(110,20,140,70); 
    l5.setBounds(400,50,140,20);   
    textFieldId.setBounds(10,70,70,20); 
      combo.setBounds(400,70,130,20);    
    b2 = new JButton("Ok");  
    b2.setBounds(10,160,50,20);  
      c.add(combo);  
    c.add(b2); 
    c.add(l1); 
    c.add(l3); 
    c.add(l5); 
    c.add(textFieldId);    
      setVisible(true); 
    setDefaultCloseOperation(EXIT_ON_CLOSE);     
      b2.addActionListener(this); 
} 
    public static void main(String[] args) 
    { 
     delete_paper ap=new delete_paper() {}; 
    } 
    public void actionPerformed(ActionEvent e) 
     { 

      System.out.println("You clicked the button");     
      if(e.getSource()==b2) 
      { 
       try 
       { 
        Connection con; 
        Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); 
        con = DriverManager.getConnection("jdbc:odbc:devendra"); 
        try 
        { 

         java.sql.Statement st = con.createStatement(); 
         PreparedStatement ps = con.prepareStatement("delete 
         from Customer where Customer_Id = ? and Paper_Name in (?) "); 
         ps.setString(1,textFieldId.getText()); 
         ps.setString(4,combo.getSelectedItem().toString()); 
         ps.executeUpdate(); 
         JOptionPane.showMessageDialog(null, 
         "You successfully Enter the Entry"); 
        } 
        catch (SQLException s) 
        { 
         System.out.println("SQL code does not execute."); 
         JOptionPane.showMessageDialog(null,"Please Enter 
         the Detail Correctly"); 
        } 
       } 
       catch (ClassNotFoundException | SQLException ee) 
       { 
        System.out.println("Error:connection not created"); 
        JOptionPane.showMessageDialog(null,"Please 
        Enter the Detail Correctly"); 
       } 
      } 
     } 
     }

來源

2013-06-24 Devendra_Ghag

添加堆棧跟蹤信息。 –

對類使用java命名約定。不要使用null佈局和setBounds。定義正確的Layoutmanager。不要在對話框和JOptionPanes中使用空父對象。用一些合理的名稱命名變量不是label1，label2。應只捕獲一次SQLException。不要每次點擊都準備好聲明。準備一次並重復使用。在您的文字中使用大寫字母以幫助讀者分割您的文字。張貼SSCCE和儘可能多的細節（合理）。比尋求幫助。 – StanislavL

@StanislavL哇！ 8（如果我計算正確）指出'問題的重要提示'..作爲評論..幹得好。 :) –

你不需要，而在預處理語句設置的值，用表列的索引。它只是指數？它被設置：

使用

   ps.setString(2,combo.getSelectedItem().toString());

代替

   ps.setString(4,combo.getSelectedItem().toString());

來源

2013-06-24 05:40:13

感謝的人...... :) –

@Devendra_Ghag如果它幫助，那麼你可以通過點擊箭頭的答案 –

確定的左接受的答案...我將遵循這些事情..... .. –

JDBC ODBC刪除查詢錯誤問題？

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