java - 组合框链接到 MySQL 和 Jtextfield

Question

我已将组合框链接到MySQL 数据库，以便它按姓名显示员工列表。 问题是，当我点击某个员工时，我想在单独的文本字段中显示他的注册号。 我尝试使用此代码，但不幸的是它不起作用:

public void popcombo(){

    try {
        String sql ="Select registration,surname,name  from employee";
        ps=conn.prepareStatement(sql);
        rs=ps.executeQuery();
        while(rs.next()){
            String surname = rs.getString("surname");
            String registration = rs.getString("registration");
            String name =rs.getString("name");
            StringBuilder st = new StringBuilder();
            st.append(surname).append("  ").append(name); 

            AutoCompleteDecorator.decorate(empcombo);


            empcombo.addItem(st);

        }
    } catch(Exception ty)
    {
        JOptionPane.showMessageDialog(null,ty);
    }
}


private void empcomboItemStateChanged(java.awt.event.ItemEvent evt) {                                          
    String  p= empcombo.getSelectedItem().toString();
    try{

        String sql ="Select surname,name,registration from employee where registration='"+p+"'";


        rs=ps.executeQuery();
        while(rs.next()){

            jTextField1.setText(rs.getString("registration"));
        }  
    }catch(Exception tz)
    {
        JOptionPane.showMessageDialog(null,tz);
    }  
}

Answer 1

我使用了这段代码:

   private void empcomboItemStateChanged(java.awt.event.ItemEvent evt) {                                          
 try{
    {
        String selectedItem = empcombo.getSelectedItem().toString();
        String sql ="Select registration from employee where surname='"+selectedItem.split(" ")[0]+"' and name='"+selectedItem.split(" ")[1]+"'";

        ps=conn.prepareStatement(sql); 
        rs=ps.executeQuery();              
        if(rs.next()){
            jTextField1.setText(rs.getString("registration"));

        } 
    }
}catch(Exception gh){
    JOptionPane.showMessageDialog(null, gh);
}
}