Question

try {
     Class.forName("net.ucanaccess.jdbc.UcanaccessDriver");
     conn = DriverManager.getConnection("jdbc:ucanaccess://C:\\Users\\AhzelBrend\\Documents\\Student.mdb");
     Statement stmt = conn.createStatement();

     String Query = "DELETE FROM StudentTable WHERE FULLNAME='"+ List1.getSelectedValue()+ "'";
     stmt.execute(Query);
     JOptionPane.showMessageDialog(null,"Record Deleted");
     FillList();
     IKlir();
    }
    catch(ClassNotFoundException ex)  {
        Logger.getLogger(Student.class.getName()).log(Level.SEVERE,null, ex);
       }
    catch(SQLException ex){
         JOptionPane.showMessageDialog(null, ex.toString());
    }

Answer 1

在您的数据库中试用此代码并查看输出。您可以更改一下并使用数据库进行测试。希望有所帮助

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class DbTest {

    public static void main(String[] args) {

        try {
            // Your MS Access driver
            // Class.forName("net.ucanaccess.jdbc.UcanaccessDriver");

            // My Test H2 driver
            Class.forName("org.h2.Driver");

            // Your MS Acess connection
            // Connection conn = DriverManager.getConnection("jdbc:ucanaccess://C:\\Users\\AhzelBrend\\Documents\\Student.mdb");

            // My H2 connection
            Connection conn = DriverManager.getConnection("jdbc:h2:mem:test;DB_CLOSE_DELAY=10");
            Statement stmt = conn.createStatement();

            // Create and fill database
            stmt.execute("CREATE TABLE StudentTable (FULLNAME VARCHAR(255))");
            for (int i = 0; i < 10; i++) {
                stmt.executeUpdate("INSERT INTO StudentTable(FULLNAME) VALUES ('Name " + i + "')");
            }

            // Your delete statement
            // String Query = "DELETE FROM StudentTable WHERE FULLNAME='"+ List1.getSelectedValue()+ "'";
            // My delete statement
            String Query = "DELETE FROM StudentTable WHERE FULLNAME='Name 5'";
            int rows = stmt.executeUpdate(Query);
            System.out.println(rows + " rows affected");
            conn.commit();
            conn.close();

            // Open a new Connection to test th result
            conn = DriverManager.getConnection("jdbc:h2:mem:test;DB_CLOSE_ON_EXIT=FALSE");
            stmt = conn.createStatement();
            ResultSet results = stmt.executeQuery("SELECT * FROM StudentTable");
            // Stundent 'Name 5' has been deleted
            while (results.next()) {
                System.out.println("Student " + results.getString("FULLNAME"));
            }
            // JOptionPane.showMessageDialog(null,"Record Deleted");
            // FillList();
            // IKlir();
        } catch (ClassNotFoundException ex) {
            ex.printStackTrace();
        } catch (SQLException ex) {
            ex.printStackTrace();
        }

    }
}

从数据库错误中删除文件

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