你好

package DAO;
import java.util.*;

public class UserDAO{
public List getAIIUser(){
try{

String SQL="SELECT * FROM user";
ResuLtSet rs= DBHelper.getResuLtSet(SQL);
List users=new ArrayList();
while( rs.next())
{
User u=new User();
u.setUserID(rs.getString("userID"));
u.setUserName(rs.getString("userName"));
u.setUserpassword(rs.getString("password"));
users.add(u);
}

catch(Exception ex){ return null;}

}
}
哪里有错？？