java - 如何根据组合选择删除JTable中的行

Question

我需要根据用户选择"is"还是“否”来删除 JTable 中的行。我现在遇到的问题是我收到一条错误消息“检查”附近的正确语法。

if(searchCombo_Job.getSelectedItem().toString().equals("Question ID")){
    String search = searchTxt_Job.getText();
    int reply = JOptionPane.showConfirmDialog(null, "This will delete all rows selected. Proceed?", "Confirm Delete", JOptionPane.YES_NO_OPTION);
    if (reply == JOptionPane.YES_OPTION) {
        dlt = "DELETE from job where question_id = " + search + "' ";                        
        pst = conn.prepareStatement(dlt);
        //pst.setString(1, search);
        ((DefaultTableModel)jobCategoryTable.getModel()).removeRow(jobCategoryTable.getSelectedRow());
        pst.execute();
    }
    else {
        fillTableJobCategory();
    } 

Answer 1

如果 job.question_id 是字符串字段，则使用

dlt = "DELETE from job where question_id = '" + search.trim() + "' ";

我会使用查询参数来避免此错误。那么该行将是

dlt = "DELETE from job where question_id = ?";

参数也是 SQL 注入(inject)攻击的预防措施。