Question

就像标题所说的那样，我想搜索SQL数据库并使用keyReleased上的jTextField在JTable上显示它。这就是我尝试过的：

 private void jTextField2KeyReleased(java.awt.event.KeyEvent evt) {                                        

 try{
     int get = (int)jTable2.getModel().getValueAt(jTable2.getSelectedRow(), 0);
        String query = "SELECT FName FROM roominfo WHERE FName LIKE '%" + jTextField2.getText() + "%'";

        String url = "jdbc:mysql://localhost:3306/adv"; 
        Connection conn = DriverManager.getConnection(url,"root","sa"); 
        Statement st = conn.createStatement();
        rs = st.executeQuery(query);
         jTable2.setModel(DbUtils.resultSetToTableModel(rs));

    conn.close();

}
     catch (Exception e) { 
        System.err.println("Got an exception! "); 
        JOptionPane.showMessageDialog(null,"Got an exception!");
        System.err.println(e.getMessage()); 
    }         // TODO add your handling code here:
}

但是，我不能正确地做到这一点。什么似乎是问题？它仍然没有搜索。

Answer 1

在keyPressed：

try{
      String url = "jdbc:mysql://localhost:3306/adv"; 
        Connection conn = DriverManager.getConnection(url,"root","sa"); 
        Statement st = conn.createStatement();
        String query = "SELECT CustomerNo, FName, FROM roominfo WHERE FName LIKE '%" + jTextField2.getText() + "%'";
      rs = st.executeQuery(query);
      jTable2.setModel(DbUtils.resultSetToTableModel(rs)); 

    conn.close();

}
     catch (Exception e) { 
        JOptionPane.showMessageDialog(null,"Got an exception!");
        System.err.println(e.getMessage()); 
    }

Answer 2

下载rs2xml.jar库并将其导入到您的特定项目库中。然后在特定的Java类中import net.proteanit.sql.DbUtils;。有一个名为学生的数据库表，当我们在txtId内插入id值，然后单击创建的search按钮进行操作时。特定学生ID的行数据将在创建的tableStudent内部执行。

search按钮内的代码如下：

        String id = txtId.getText();
        String searchQuery = "SELECT * FROM student WHERE id ='"+id+"'";
        try {
            PreparedStatement pst = conn.prepareStatement(searchQuery);
            ResultSet rs = pst.executeQuery();
            tableStudent.setModel(DbUtils.resultSetToTableModel(rs));
        } catch (SQLException ex) {
            Logger.getLogger(UpdateDonor.class.getName()).log(Level.SEVERE, null, ex);
        }

如何搜索SQL数据库并将其显示在JTable上

2 个答案: