- Student.java
- Student.hbm.xml
- Course.java
- Course.hbm.xml
- HibernateUtil.java
- StudentDAO.java
- CourseDAO.java
- hibernate.cfg.xml
- Test.java
- 测试结果截图（部分）
要求
1）目的：真正学会使用Hibernate来进行增加、查询、更新、删除 *** 作
2）内容：在数据库中建立父子表，分别能对父子表进行增加、查询、更新、删除 *** 作，一定要实现分页功能。
1、 新建一个名为test10的数据库，并新建表student_table、course_table。其中student_table为父表，course_table为子表。
2、 创建Student类、Course类，以及对应的xml文件
位置： com.bnuz.domain
package com.bnuz.domain;
public class Student {
private Integer id;
private String name;
private String academy;
public Student() {
// TODO Auto-generated constructor stub
}
// getter / setter 略...
}
位置： com.bnuz.domain
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.bnuz.domain">
<class name="Student" table="student_table">
<id name="id" type="java.lang.Integer">
<generator class="identity" />
</id>
<property name="name" />
<property name="academy" />
</class>
</hibernate-mapping>
位置：com.bnuz.domain
package com.bnuz.domain;
public class Course {
private Integer courseNo;
private String courseName;
private Student student;
public Course() {
// TODO Auto-generated constructor stub
}
// getter /setter 略...
}
位置：com.bnuz.domain
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.bnuz.domain">
<class name="Course" table="course_table">
<id name="courseNo" column="course_no">
<generator class="identity" />
</id>
<property name="courseName" />
<many-to-one name="student" class="Student"
column="student_id"/>
</class>
</hibernate-mapping>
3、新建HibernateUtil类
HibernateUtil.java位置：com.bnuz.hibernate
package com.bnuz.hibernate;
import org.hibernate.*;
import org.hibernate.cfg.*;
public class HibernateUtil {
public static final SessionFactory sessionFactory;
static {
try {
Configuration configuration = new Configuration().configure();
sessionFactory = configuration.buildSessionFactory();
} catch (Throwable ex) {
System.err.println("初始化sessionFactory失败." + ex);
throw new ExceptionInInitializerError(ex);
}
}
public static final ThreadLocal<Session> session = new ThreadLocal<Session>();
public static Session currentSession() throws HibernateException {
Session s = session.get();
if (s == null) {
s = sessionFactory.openSession();
session.set(s);
}
return s;
}
public static void closeSession() throws HibernateException {
Session s = session.get();
if (s != null)
s.close();
session.set(null);
}
}
4、 创建StudentDAO类，CourseDAO类。编写增删改查及分页方法。。
位置：com.bnuz.dao
package com.bnuz.dao;
import java.util.List;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;
import com.bnuz.domain.Student;
import com.bnuz.hibernate.HibernateUtil;
public class StudentDAO {
/**
* 新增学生
*
* @param student
*/
public static void addStudent(Student student) {
Session session = HibernateUtil.currentSession();
Transaction transaction = session.beginTransaction();
session.save(student);
transaction.commit();
HibernateUtil.closeSession();
}
/**
* 根据学生id删除某个学生
*
* @param id
*/
public static void delStudent(int id) {
Session session = HibernateUtil.currentSession();
Transaction transaction = session.beginTransaction();
session.createQuery("delete Course where student=" + id).executeUpdate();
session.createQuery("delete Student where id=" + id).executeUpdate();
transaction.commit();
HibernateUtil.closeSession();
}
/**
* 修改某个学生的信息
*
* @param student
*/
public static void updateStudent(Student student) {
Session session = HibernateUtil.currentSession();
Transaction transaction = session.beginTransaction();
session.update(student);
transaction.commit();
HibernateUtil.closeSession();
}
/**
* 根据学生id查询某个学生的信息
*
* @param id
*/
public static void findStudent(int id) {
Session session = HibernateUtil.currentSession();
Transaction transaction = session.beginTransaction();
Student student = (Student) session.get(Student.class, id);
System.out.println("name:" + student.getName() + " academy:" + student.getAcademy());
transaction.commit();
HibernateUtil.closeSession();
}
/**
* 分页查询
*
* @param pageNo 页码
* @param pageSize 每页的数据长度
*/
public static void PagingQueryStudent(int pageNo, int pageSize) {
Session session = HibernateUtil.currentSession();
Transaction transaction = session.beginTransaction();
Query query = session.createQuery("from Student");
query.setMaxResults(pageSize);
query.setFirstResult((pageNo - 1) * pageSize);
List<Student> list = query.list();
System.out.println("--第" + pageNo + "页，每页至多有" + pageSize + "条数据----");
for (Student student : list) {
System.out.println(student.getId() + " " + student.getName() + " " + student.getAcademy());
}
transaction.commit();
HibernateUtil.closeSession();
}
}
package com.bnuz.dao;
import java.util.List;
import org.hibernate.Criteria;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;
import com.bnuz.domain.Course;
import com.bnuz.hibernate.HibernateUtil;
public class CourseDAO {
/**
* 新增一个课程
*
* @param course
*/
public static void addCourse(Course course) {
Session session = HibernateUtil.currentSession();
Transaction transaction = session.beginTransaction();
session.save(course);
transaction.commit();
HibernateUtil.closeSession();
}
/**
* 根据课程id删除某个课程信息
*
* @param courseNo
*/
public static void delCourse(int courseNo) {
Session session = HibernateUtil.currentSession();
Transaction transaction = session.beginTransaction();
session.createQuery("delete Course where courseNo=" + courseNo).executeUpdate();
transaction.commit();
HibernateUtil.closeSession();
}
/**
* 修改某个课程信息
*
* @param course
*/
public static void updateCourse(Course course) {
Session session = HibernateUtil.currentSession();
Transaction transaction = session.beginTransaction();
session.update(course);
transaction.commit();
HibernateUtil.closeSession();
}
/**
* 根据课程id查询
*
* @param courseNo
*/
public static void findCourse(int courseNo) {
Session session = HibernateUtil.currentSession();
Transaction transaction = session.beginTransaction();
Course course = (Course) session.get(Course.class, courseNo);
System.out.println("id为" + course.getStudent().getId() + "学生" + course.getStudent().getName() + "选修了课程："
+ course.getCourseName());
transaction.commit();
HibernateUtil.closeSession();
}
/**
* 分页查询
*
* @param pageNo 页码
* @param pageSize 每页的数据长度
*/
public static void PagingQueryCourse(int pageNo, int pageSize) {
Session session = HibernateUtil.currentSession();
Transaction transaction = session.beginTransaction();
Query query = session.createQuery("from Course");
query.setMaxResults(pageSize);
query.setFirstResult((pageNo - 1) * pageSize);
List<Course> list = query.list();
System.out.println("--第" + pageNo + "页，每页至多有" + pageSize + "条数据---");
for (Course course : list) {
System.out.println(course.getCourseNo() + " " + course.getCourseName() + " " + course.getStudent().getId());
}
transaction.commit();
HibernateUtil.closeSession();
}
}
5、配置hibernate.cfg.xml
hibernate.cfg.xml位置：src
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<!-- Database connection settings -->
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql://localhost:3306/test10?serverTimezone=GMT%2B8</property>
<property name="connection.username">root</property>
<property name="connection.password">4580796</property>
<property name="hibernate.c3p0.max_size">20</property>
<property name="hibernate.c3p0.min_size">1</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hbm2ddl.auto">update</property>
<property name="hibernate.format_sql">true</property>
<property name="hibernate.hbm2ddl.auto">update</property>
<property name="show_sql">true</property>
<mapping resource="com/bnuz/domain/Student.hbm.xml"/>
<mapping resource="com/bnuz/domain/Course.hbm.xml"/>
</session-factory>
</hibernate-configuration>
6、编写测试类Test，测试所有方法
Test.javaimport com.bnuz.dao.CourseDAO;
import com.bnuz.dao.StudentDAO;
import com.bnuz.domain.Course;
import com.bnuz.domain.Student;
public class Test {
public static void main(String[] args) {
Test test = new Test();
/* test.testUpdateCourse(); */
}
private void testAddCourse() {
Course course = new Course();
course.setCourseName("C");
Student student = new Student();
student.setId(2);
course.setStudent(student);
CourseDAO.addCourse(course);
}
private void testDelCourse() {
CourseDAO.delCourse(1);
}
private void testUpdateCourse() {
Course course = new Course();
course.setCourseNo(1);
course.setCourseName("JAVA快乐入门教程");
Student student = new Student();
student.setId(2);
course.setStudent(student);
CourseDAO.updateCourse(course);
}
private void testFindCourse() {
CourseDAO.findCourse(1);
}
private void testPagingQueryCourse() {
CourseDAO.PagingQueryCourse(1, 4);
}
private void testPagingQueryStudent() {
//StudentDAO.PagingQueryStudent(1, 3);
StudentDAO.PagingQueryStudent(2, 3);
}
private void testFindStudent() {
StudentDAO.findStudent(1);
}
private void testDelStudent() {
StudentDAO.delStudent(1);
}
private void testAddStudent() {
Student student = new Student();
student.setName("yeye");
student.setAcademy("信息技术学院");
StudentDAO.addStudent(student);
}
private void testUpdateStudent() {
Student student = new Student();
student.setId(1);
student.setName("hey");
student.setAcademy("信息技术学院");
StudentDAO.updateStudent(student);
}
}
…………
（；´д｀）ゞ菜鸟一枚，，水水博客，如有问题，欢迎指教！
欢迎分享，转载请注明来源：内存溢出
微信扫一扫
支付宝扫一扫
评论列表（0条）