studentsserviceimpl.java

学生信息管理

/*
 * 创建日期 2005-7-20
 *  
 */
package limq.spring.service;

import org.apache.log4j.BasicConfigurator;
import org.apache.log4j.Logger;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import java.util.*;

import net.sf.hibernate.Hibernate;
import net.sf.hibernate.Criteria;
import net.sf.hibernate.expression.*;
import net.sf.hibernate.Query;
import limq.hibernate.dao.*;
import limq.hibernate.vo.*;
import limq.common.*;

public class StudentsServiceImpl implements IStudentsService {

    private Logger log = Logger.getLogger(this.getClass());

    private IStudents studentsDao;

    private ICourses coursesDao;

    private IClasses classesDao;

    private IDepartment departmentsdao;

    /**
     * 验证用户名密码
     * 
     * @param username
     * @param password
     */

    public boolean validate(String username, String password) {

        String password2 = studentsDao.getPasswordFromUsername(username);
        if (password.equals(password2))
            return true;
        else
            return false;

    }
    /**
     *  分页显示所有课程
     * 
     * @param pageinfo
     */
    public HashMap getCourse(PageInfo pageinfo) throws Exception {

        HashMap hp = new HashMap();
        String hsql = "select c from Courses as c order by c.id";
        Query query = coursesDao.getQuery(hsql);
        int totalCount = pageinfo.getTatalCount();
        int totalPage = pageinfo.getTotalpage();
        int start = pageinfo.getStart();
        totalCount = totalCount == -1 ? coursesDao.getTotalCount(hsql)
                : totalCount;
        totalPage = totalPage == -1 ? coursesDao.getTotalPage(totalCount,
                pageinfo.getPageSize()) : totalPage;

        query.setFirstResult(start);
        query.setMaxResults(pageinfo.getPageSize());
        List list = query.list();
        hp.put("courses", (Courses[]) list.toArray(new Courses[0]));
        hp.put("totalCount", new Integer(totalCount));
        hp.put("totalPage", new Integer(totalPage));
        return hp;

    }
    /**
     *  分页显示所有选课历史
     * @param pageinfo 
     * @param stu_name
     */
    public HashMap getStudentHistory(PageInfo pageinfo, String stu_name)
            throws Exception {
        HashMap hp = new HashMap();
        Students stu = this.getStudetFromName(stu_name);
        Integer stu_id = stu.getId();
        Criteria criteria = coursesDao.getCriteria(History.class);

        criteria.createCriteria("student").add(Expression.eq("name", stu_name));
        int totalCount = pageinfo.getTatalCount();
        int totalPage = pageinfo.getTotalpage();
        int start = pageinfo.getStart();
        totalCount = totalCount == -1 ? criteria.list().size() : totalCount;
        totalPage = totalPage == -1 ? studentsDao.getTotalPage(totalCount,
        pageinfo.getPageSize()) : totalPage;
        criteria.setFirstResult(start);
        criteria.setMaxResults(pageinfo.getPageSize());
        criteria.addOrder(Order.asc("id"));
       // criteria.addOrder(Order.desc("id"));
        List list = criteria.list();
        hp.put("history", (History[]) list.toArray(new History[0]));
        hp.put("totalCount", new Integer(totalCount));
        hp.put("totalPage", new Integer(totalPage));
        return hp;
    }

    /**
     * 根据主键查找系
     * 
     * @param id
     *            主键ID
     */
    public Department getDepFromID(Integer id) {

        return (Department) departmentsdao
                .loadByKey(Department.class, "id", id);
    }

    /**
     * 根据主键查找课程
     * 
     * @param id
     *            主键ID
     */
    public Courses getCourseFromID(Integer id) {

        return (Courses) coursesDao.loadByKey(Courses.class, "id", id);

    }

    /**
     * 根据主键查找班级
     * 
     * @param id
     *            主键ID
     */
    public Classes getClassFromID(Integer id) {

        return (Classes) classesDao.loadByKey(Classes.class, "id", id);
    }

    /**
     * 根据姓名查找学生
     * 
     * @param name
     *  
     */
    public Students getStudetFromName(String name) {

        return (Students) studentsDao.loadByKey(Students.class, "name", name);
    }

    /**
     * 检查学生是否选报了同一课程的班级
     * 
     * @param clazz
     *            所选报的班级
     * @param stu
     *            学生实体
     * @return true 该生选报同一课程的班级
     * @return false 没有报过该课程的班级，可以选报
     *  
     */
    public boolean ifEnrolSameCourse(Classes clazz, Students stu) {

        Courses cour = clazz.getCourse();

        Classes[] classes = (Classes[]) stu.getClasses()
                .toArray(new Classes[0]);
        for (int i = 0; i < classes.length; i++) {

            Courses c1 = classes[i].getCourse();

            if (c1.getId().equals(cour.getId()))
                return true;

        }

        return false;
    }

    /**
     * 检查课程的目前人数
     * 
     * @param clazz
     *            检查班级人数是否已满
     * @param clazz
     *            班级实体
     * @return true 班级人数已满
     * @return false 班级人数未满
     *  
     */
    public boolean ifMoreThanCap(Classes clazz) {
        Integer capacity = clazz.getCapacity();
        Integer maxcapacity = clazz.getMaxcapacity();
        if (capacity.intValue() < maxcapacity.intValue()) {
            clazz.setCapacity(Integer.valueOf(capacity.intValue() + 1));
            //classesDao.update(clazz);
            return false;
        } else
            return true;

    }

    /**
     * 相数据库插入一条学生选择班级的记录
     * 
     * @param stu
     *            学生
     * @param clazz
     *            所选择的班级
     */
    public void selectClasses(Students stu, Classes clazz, Date date)
 {
        stu.getClasses().add(clazz);
        clazz.getStudents().add(stu);          
        History his = new History();
        his.setEnrolTime(date);
        his.setStudent(stu);
        his.setClasses(clazz);
        his.setScore(clazz.getCourse().getScore());
        his.setMarking(new Double(0));
        try{
        String cour_name=new String(clazz.getCourse().getName().getBytes("GBK"));       
        his.setCourseName(cour_name);
        }catch( java.io.UnsupportedEncodingException e){e.getStackTrace();}       
        stu.getHistory().add(his);
    }

    public void updateSudent(Students stu,Contact contact){
        
       studentsDao.update(stu);
       studentsDao.update(contact);
    
    }
    /**
     * @return 返回 studentsDao。
     */
    public IStudents getStudentsDao() {
        return studentsDao;
    }

    /**
     * @param studentsDao
     *            要设置的 studentsDao。
     */
    public void setStudentsDao(IStudents studentsDao) {
        this.studentsDao = studentsDao;
    }

    /**
     * @return 返回 classesDao。
     */
    public IClasses getClassesDao() {
        return classesDao;
    }

    /**
     * @param classesDao
     *            要设置的 classesDao。
     */
    public void setClassesDao(IClasses classesDao) {
        this.classesDao = classesDao;
    }

    /**
     * @return 返回 coursesDao。
     */
    public ICourses getCoursesDao() {
        return coursesDao;
    }

    /**
     * @param coursesDao
     *            要设置的 coursesDao。
     */
    public void setCoursesDao(ICourses coursesDao) {
        this.coursesDao = coursesDao;
    }

    /**
     * @return 返回 departmentdao。
     */
    public IDepartment getDepartmentsdao() {
        return departmentsdao;
    }

    /**
     * @param departmentdao
     *            要设置的 departmentdao。
     */
    public void setDepartmentsdao(IDepartment departmentdao) {
        this.departmentsdao = departmentdao;
    }

  

}