如何在文本區域中顯示數據庫中的多行

Question

我正在嘗試獲取受益人表的所有行，其中localgovernment是文本字段“搜索”的內容，以顯示在單個文本區域“結果”中。 數據庫沒有固定的行數。
這是我的代碼：

String bs = search.getText();

String SQL = "select * from BENEFICIARIES where localgovernment = '" +bs+"'";
        rs = stmt.executeQuery(SQL);

        String[] kjh;
        kjh = new String[20];
        int sd = 0;
        while(rs.next()){

        int id = rs.getInt("bid");
        String name = rs.getString("name");
        String gender = rs.getString("gender");
        String Phone = rs.getString("phone");
        String mail = rs.getString("email");
        String lga = rs.getString("localgovernment");
        String address = rs.getString("address");
        String etype = rs.getString("typeofempowerment");
        String benefits = rs.getString("listofbenefits");
        mega = id + " "+ name +" "+gender+" "+Phone+" "+mail+" "+lga+" "+address+" "+etype+" "+benefits;
       kjh[sd] = mega;
       sd = sd + 1;
        }
        String jhg = kjh[0] +"\n"+ kjh[1] +"\n"+ kjh[2] +"\n"+ kjh[3] +"\n"+ kjh[4] +"\n"+ kjh[5] +"\n"+ kjh[6] +"\n"+ kjh[7] +"\n"+ kjh[8] +"\n"+ kjh[9] +"\n"+ kjh[10] +"\n"+ kjh[11] +"\n"+ kjh[12] +"\n"+ kjh[13] +"\n"+ kjh[14] +"\n"+ kjh[15] +"\n"+ kjh[16] +"\n"+ kjh[17] +"\n"+ kjh[18] +"\n"+ kjh[19];

        result.setText(jhg);

如何使它在文本區域中顯示可變長度的行？

Answer 1

只需使用循環。

要添加的另一件事，您可以使用ArrayList或LinkedList類的List類型。

顯示數據的另一種簡單方法是使用JTable而不是Textarea 。
嘗試這個...

String bs = search.getText();
String SQL = "select * from BENEFICIARIES where localgovernment = '" +bs+"'";
rs = stmt.executeQuery(SQL);
List<String> kjh = new ArrayList<String>();
while(rs.next()){
    int id = rs.getInt("bid");
    String name = rs.getString("name");
    String gender = rs.getString("gender");
    String Phone = rs.getString("phone");
    String mail = rs.getString("email");
    String lga = rs.getString("localgovernment"); 
    String address = rs.getString("address");
    String etype = rs.getString("typeofempowerment");
    String benefits = rs.getString("listofbenefits");
    mega = id + " "+ name +" "+gender+" "+Phone+" "+mail+" "+lga+" "+address+" "+etype+" "+benefits;
    kjh.add(mega);
}
String jhg="";
for(String s:kjh)
    jhg+=s+"\n";
result.setText(jhg);