基於Java中的用戶輸入的SQL查詢

Question

dis = new DataInputStream(csocket.getInputStream()); 
int choice = dis.readInt(); 
Connection conn = MySqlConnect.ConnectDB(); 
PreparedStatement pst = conn.prepareStatement("Select hostname from clients where C_ID="); 
ResultSet rs = pst.executeQuery(); 

如何將選擇放入給定查詢中？

Answer 1

你可以嘗試使用pst.setInt這樣的：

PreparedStatement pst=conn.prepareStatement("Select hostname from clients where C_ID=?"); 
pst.setInt(1, choice); 
ResultSet rs=pst.executeQuery();