checkuserbean.java

Easy_Buy是一个在线销售系统

//package eshop;
import java.util.*;
import java.sql.*;

public class CheckUserBean {
  private Connection conn;
  private boolean checkResult;

  public CheckUserBean() {
    this.checkResult=false;
  }

  public void setConn(Connection conn){
    this.conn=conn;
  }

  public boolean checkUser(String username,String password){
    try {
      Statement stmt = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,
                                            ResultSet.CONCUR_READ_ONLY);
      String sql = "SELECT * FROM Customers WHERE Username='" + username + "'";
      ResultSet rsLogin = stmt.executeQuery(sql);
      if(!rsLogin.next()){
        checkResult=false;
      }else if(!password.equals(rsLogin.getString("Password"))){
        checkResult=false;
      }else{
        checkResult = true;
      }
      rsLogin.close();
      stmt.close();
    }catch(SQLException e){
      e.printStackTrace();
    }
    return checkResult;
  }
}