小编Guo*_*hao的帖子

我需要以下错误的帮助.下面是方法retrievePassword().我对它进行了编程,以便在调用Clickid时,我也可以检索所有其他数据.

public boolean retrievePassword() {
  // declare local variables
  boolean success = false;
  ResultSet rs = null;
  DBController db = new DBController();

  // step 1 of using DBController, passing data source name setup during last practical
  db.setUp("myDatabase");

  // declare the SQL 
  String dbQuery = "SELECT Clickid FROM PROFILE WHERE Clickid = '" + clickId + "'" ;


  // step 2 of using DBCcontroller, for retrieve SQL use readRequest method
  rs = db.readRequest(dbQuery);
  try{
     if (rs.next()){
   firstName = rs.getString("Firstname");
   lastName = …

我很难将多个结果集存储到ArrayList中.我还需要在JTextArea中显示它们.但问题是,我不能让它显示任何东西.

public static ArrayList<Wall> getWallPosts(int postId){

    ArrayList<Wall> postList = new ArrayList<Wall>();
    ResultSet rs = null;
    DBController db = new DBController();

    db.setUp("myDatabase");
    String dbQuery = "SELECT Id FROM Wall WHERE ID ="+postId; 

    rs = db.readRequest(dbQuery);

    try{
       while (rs.next()){
            int wallId = rs.getInt("Id");
            String wallPoster = rs.getString("Poster");
            String wallPost = rs.getString("Post");
            String wallDate = rs.getString("Tdate");
            Wall w1 = new Wall(wallPoster, wallPost , wallDate);
            postList.add(w1);   
       }
    }
    catch (Exception e) {
       e.printStackTrace();
    }


    db.terminate();
    return postList;

}
    //The method for displaying the result …