teachersserviceimpl.java

struts+spring+hibernate的学生管理系统 很适合新手研究

/*
 * 创建日期 2005-8-25
 * 
 * TODO 要更改此生成的文件的模板，请转至 窗口 － 首选项 － Java － 代码样式 － 代码模板
 */
package limq.spring.service;

import net.sf.hibernate.Criteria;

import org.apache.log4j.BasicConfigurator;
import org.apache.log4j.Logger;
import net.sf.hibernate.expression.*;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import java.util.*;
import net.sf.hibernate.Query;
import limq.hibernate.dao.*;
import limq.hibernate.vo.*;

public class TeachersServiceImpl implements ITeachersService {

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

    private ITeachers teachersDao;

    private IClasses classesDao;

    private ICourses coursesDao;

    private IStudents studentsDao;

    public boolean validate(String username, String password) {

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

    }

    public Classes[] getClassFromTeacher(String tea_name) {
        Teachers teacher = (Teachers) teachersDao.loadByKey(Teachers.class,
                "name", tea_name);
        return (Classes[]) teacher.getClasses().toArray(new Classes[0]);

    }

    public Students[] getStudentsFromClass(Integer id) {

        Classes clazz = (Classes) classesDao.loadByKey(Classes.class, "id", id);

        return (Students[]) clazz.getStudents().toArray(new Students[0]);

    }

    public void updateMark(Integer stu_id, Integer classid, Double mark) {
        List list = null;
        try {
            Criteria criteria = coursesDao.getCriteria(History.class);
            criteria.createCriteria("student").add(Expression.eq("id", stu_id));
            criteria.createCriteria("classes")
                    .add(Expression.eq("id", classid));
            list = criteria.list();
        } catch (Exception e) {
            e.printStackTrace();
        }
        History his = (History) list.get(0);
        Students stu = (Students) studentsDao.getByPk(Students.class, stu_id);
        double score = stu.getScore().doubleValue();

        if (mark.doubleValue() > 60 && his.getMarking().doubleValue() < 60) {

            double upscore = score + his.getScore().doubleValue();
            stu.setScore(new Double(upscore));
        } else if (mark.doubleValue() < 60
                && his.getMarking().doubleValue() > 60) {
            double upscore = score - his.getScore().doubleValue();
            stu.setScore(new Double(upscore));
        }
        his.setMarking(mark);
    }

    public History[] getHistoryFromClass(Integer class_id) {
        List list = null;
        Classes clazz = (Classes)classesDao.getByPk(Classes.class,class_id);
        return  (History[])clazz.getHistory().toArray(new History[0]);
        
    }

    /**
     * @return 返回 teachersDao。
     */
    public ITeachers getTeachersDao() {
        return teachersDao;
    }

    /**
     * @param teachersDao
     *            要设置的 teachersDao。
     */
    public void setTeachersDao(ITeachers teachersDao) {
        this.teachersDao = teachersDao;
    }

    /**
     * @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 studentsDao。
     */
    public IStudents getStudentsDao() {
        return studentsDao;
    }

    /**
     * @param studentsDao
     *            要设置的 studentsDao。
     */
    public void setStudentsDao(IStudents studentsDao) {
        this.studentsDao = studentsDao;
    }
    
    public static void main(String[] arg) throws Exception {

        BasicConfigurator.configure();
        ApplicationContext context = new ClassPathXmlApplicationContext(
                "applications-service.xml");
        ITeachersService teadao = (ITeachersService) context
                .getBean("teacherManager");
       
        
    
    }
    
    
}