LoginPageServicer.java

package bce.server.servicers;

import bce.java.utils.Hash;
import bce.jni.utils.BCEUtils;
import bce.server.dao.UserDAO;
import bce.server.entities.PersistentUser;
import bce.server.servlets.LoginServlet;

/**
 * 业务类，LoginServlet的业务服务者
 *
 * @author robins
 *
 */
public class LoginPageServicer {

    private UserDAO userDAO;

    public LoginPageServicer() {
    }

    public void setUserDAO(UserDAO userDAO) {
        this.userDAO = userDAO;
    }

    /**
     * 该方法用于检查登录
     *
     * @param userName 登录用户名
     * @param password 登录用户密码
     * @param returnedUser 服务器端构建的登录用户对象
     * @return 0：USER_NAME_NOT_EXISTS; 1：PASSWORD_NOT_MATCH; 2：LOGIN_CHECK_PASSED；
     */
    public int checkLogin(String userName, String password, PersistentUser returnedUser) {
        PersistentUser genericUser = userDAO.get(userName);
        if (genericUser == null)
            return LoginServlet.USER_NAME_NOT_EXISTS;
        if (BCEUtils.hex(Hash.sha1(password)).equals(genericUser.getPassword())) {
            this.buildUser(returnedUser, genericUser);
            return LoginServlet.LOGIN_CHECK_PASSED;
        }
        return LoginServlet.PASSWORD_NOT_MATCH;
    }

    /**
     * 为新登录用户构建一个持久化对象
     *
     * @param returnedUser 返回用户对象
     * @param genericUser 从数据库中检索出的用户对象
     */
    private void buildUser(PersistentUser returnedUser, PersistentUser genericUser) {
        returnedUser.setEmail(genericUser.getEmail());
        returnedUser.setPassword(genericUser.getPassword());
        returnedUser.setUserId(genericUser.getUserId());
        returnedUser.setUserName(genericUser.getUserName());
        returnedUser.setRegDate(genericUser.getRegDate());
    }
}