studentservice.java

这是一个学校老师和学生的管理系统,程序比较简单,但是几乎所有功能都可以实现,如果想要用,只要再添加一些东西就可以了.

/**
 *******************************************************************************
 * StudentService.java
 *
 * (c) Copyright 2008 Hewlett-Packard Development Company, L.P.
 *
 *<Program Content>
 *  System Name ： Students Management System
 *<Summarize>
 *  The file includes a class ande the class main function is to select or update
 *  the user information.
 *<Update Record>
 *  2009-5-6    1.00    zhangliy
 *******************************************************************************
 */
package com.hp.eds.zhangliyuan.stuMan.service;

import java.util.List;

import com.hp.eds.zhangliyuan.stuMan.dao.StudentDao;
import com.hp.eds.zhangliyuan.stuMan.dao.interf.StudentDaoInt;
import com.hp.eds.zhangliyuan.stuMan.dto.UserDto;
import com.hp.eds.zhangliyuan.stuMan.dto.UserDtoTwo;
import com.hp.eds.zhangliyuan.stuMan.entity.UserInfo;
import com.hp.eds.zhangliyuan.stuMan.service.interf.StudentServiceInt;
import com.hp.eds.zhangliyuan.stuMan.util.StringTool;

/**
 * The class main function is to select or update the user information.
 * 
 * @author zhangliy
 * @version 1.0
 */
public class StudentService implements StudentServiceInt {
	private StudentDaoInt dataOperation;

	/**
	 * dataOperation of get
	 * 
	 * @return dataOperation
	 */
	public StudentDaoInt getDataOperation() {
		return dataOperation;
	}

	/**
	 * dataOperation of set
	 * 
	 * @param dataOperation
	 *            set {bare_field_name}
	 */
	public void setDataOperation(StudentDaoInt dataOperation) {
		this.dataOperation = dataOperation;
	}

	/**
	 * verify the user's logon information right or wrong
	 * 
	 * @param userDto
	 *            -the object of UserDto
	 * @return UserDto includes the user information
	 * 
	 */
	public UserDto getUserInfo(UserDto userDto) {
		dataOperation = new StudentDao();
		UserInfo user = dataOperation.getUserInfo(userDto.getUserID());
		if (user == null) {
			// the user is not exist
			return null;
		}
		if (user.getPassword().equals(userDto.getPassword())) {
			// the password is right,return userDto
			userDto.setUser(user);
			return userDto;
		} else {
			// the password is not right
			return null;
		}
	}

	/**
	 * get the courses that current student can select
	 * 
	 * @param userID
	 *            the user's ID
	 * @return List includes all courses information that the student can choose
	 */
	public List getCourseList(String userID) {
		dataOperation = new StudentDao();
		List list = dataOperation.getCourseList(userID);
		if (list != null) {
			return list;
		} else {
			return null;
		}
	}

	/**
	 * according to the class's ID and the user's ID to select a course and
	 * register the course
	 * 
	 * @param userID
	 *            -user's ID
	 * @param classID
	 *            -class's ID
	 * @return boolean
	 */
	public boolean updateEnrol(String userID, String classID) {
		dataOperation = new StudentDao();
		boolean regisSus = dataOperation.txInsertCourse(userID, classID);
		if (regisSus == true) {
			return true;
		}
		return false;
	}

	/**
	 * get the score that current student has gotten
	 * 
	 * @param userID
	 *            -the user's ID
	 * @return List the course score information
	 */
	public List getScoreList(String userID) {
		dataOperation = new StudentDao();
		List list = dataOperation.getScoreList(userID);
		if (list != null) {
			return list;
		} else {
			return null;
		}
	}

	/**
	 * update the information of an user and write the file again
	 * 
	 * @param userDto
	 *            -the update information
	 * @return UserInfo the user whose information maybe changed,if the input is
	 *         illegal,return null
	 */
	public UserInfo updateUserInfo(UserDtoTwo userDto) {

		dataOperation = new StudentDao();

		if (StringTool.isStringEmpty(userDto.getPassword())) {
			// the new password is empty,keep the original password
		} else if (!userDto.getPassword().equals(
				userDto.getUser().getPassword())) {
			// the password is not empty,update the password
			userDto.getUser().setPassword(userDto.getPassword());
			dataOperation.txUpdatePas(userDto.getUser().getStuId(), userDto
					.getPassword());
		}

		if (!userDto.getTelephone().equals(userDto.getUser().getTelephone())) {
			// update the phone number
			userDto.getUser().setTelephone(userDto.getTelephone());
			dataOperation.txUpdateTel(userDto.getUser().getStuId(), userDto
					.getTelephone());
		}
		if (!userDto.getEmail().equals(userDto.getUser().getEmail())) {
			// update the email
			userDto.getUser().setEmail(userDto.getEmail());
			dataOperation.txUpdateEmail(userDto.getUser().getStuId(), userDto
					.getEmail());
		}
		return userDto.getUser();
	}
}