Example #1
0
  public User register(String email, String password) throws Exception {
    DatabaseConnection dbc = new DatabaseConnection();
    Connection conn = dbc.getConnection();
    PreparedStatement pStatement = null;
    // 结果
    User user = new User();
    // 搜索语句
    String query = "INSERT INTO User (id, email, password, avatar) " + "VALUES (NULL, ?, ?, NULL)";
    String result = "select * from User where email=?";
    if (isUserExisted(email)) {
      return null;
    } else {
      try {
        // 执行插入
        pStatement = conn.prepareStatement(query);
        pStatement.setString(1, email);
        pStatement.setString(2, password);

        int row = pStatement.executeUpdate();
        // 判断是否为空
        if (row > 0) {
          // 若不为空,返回刚插入的对象
          System.out.println("Signup Successful!");
          pStatement = conn.prepareStatement(result);
          pStatement.setString(1, email);
          ResultSet rs = pStatement.executeQuery();
          if (rs.next()) {
            user.setId(rs.getInt("id"));
            user.setEmail(rs.getString("email"));
            user.setPassword(rs.getString("password"));
            user.setAvatar(rs.getString("avatar"));
          }
        } else {
          System.out.println("Signup faild!");
          user = null;
        }
        // 关闭连接,返回结果
        // rs.close();
        dbc.close();
        return user;

      } catch (SQLException e) {
        e.printStackTrace();
      }
    }
    return null;
  }
Example #2
0
  public List<User> getUnknownUsers(int myId) throws Exception {
    // 连接数据库
    DatabaseConnection dbc = new DatabaseConnection();
    Connection conn = dbc.getConnection();
    PreparedStatement pStatement = null;
    // 声明变量用于存取结果
    List<User> userList = new LinkedList<User>();
    // 搜索语句
    String query =
        "SELECT * FROM `User` WHERE id != ? and id not in (select friendId from Relation where myid = ?)";
    try {
      // 执行搜索
      pStatement = conn.prepareStatement(query);
      pStatement.setInt(1, myId);
      pStatement.setInt(2, myId);
      ResultSet rs = pStatement.executeQuery();

      while (rs.next()) {
        User user = new User();
        user.setId(rs.getInt("id"));
        user.setEmail(rs.getString("email"));
        user.setPassword(rs.getString("password"));
        user.setAvatar(rs.getString("avatar"));
        userList.add(user);
      }
      // 判断是否为空
      if (userList.size() != 0) {
        System.out.println("getFriends Successful!");
      } else {
        System.out.println("getFriends No record satisfied!");
        userList = null;
      }
      // 关闭连接,返回结果
      // rs.close();
      dbc.close();
      return userList;
    } catch (SQLException e) {
      e.printStackTrace();
    }

    return null;
  }
Example #3
0
  public User login(String email, String password) throws Exception {
    // 连接数据库
    DatabaseConnection dbc = new DatabaseConnection();
    Connection conn = dbc.getConnection();
    PreparedStatement pStatement = null;
    // 声明变量用于存取结果
    User user = new User();
    // 搜索语句
    String query = "select * from User where email= ? and password= ?";

    try {
      // 执行搜索
      pStatement = conn.prepareStatement(query);
      pStatement.setString(1, email);
      pStatement.setString(2, password);
      ResultSet rs = pStatement.executeQuery();

      while (rs.next()) {
        user.setId(rs.getInt("id"));
        user.setEmail(rs.getString("email"));
        user.setPassword(rs.getString("password"));
        user.setAvatar(rs.getString("avatar"));
      }
      // 判断是否为空
      if (user.getId() != 0) {
        System.out.println("login Successfully!");
      } else {
        System.out.println("login Faild!");
        user = null;
      }
      // 关闭连接,返回结果
      // rs.close();
      dbc.close();
      return user;
    } catch (SQLException e) {
      e.printStackTrace();
    }
    return null;
  }
Example #4
0
  public User getUser(int id) throws Exception {
    // 连接数据库
    DatabaseConnection dbc = new DatabaseConnection();
    Connection conn = dbc.getConnection();
    PreparedStatement pStatement = null;
    // 声明变量用于存取结果
    User user = new User();
    // 搜索语句
    String query = "SELECT *  FROM `User` WHERE `id` = ?";
    try {
      // 执行搜索
      pStatement = conn.prepareStatement(query);
      pStatement.setInt(1, id);
      ResultSet rs = pStatement.executeQuery();

      while (rs.next()) {
        user.setId(rs.getInt("id"));
        user.setEmail(rs.getString("email"));
        user.setPassword(rs.getString("password"));
        user.setAvatar(rs.getString("avatar"));
      }
      // 判断是否为空
      if (user.getId() != 0) {
        System.out.println("getUser Successful!");
      } else {
        System.out.println("getuser No record satisfied!");
        user = null;
      }
      // 关闭连接,返回结果
      // rs.close();
      dbc.close();
      return user;
    } catch (SQLException e) {
      e.printStackTrace();
    }

    return null;
  }