SSH+DB2搭建开发环境(下)
1.倒入所需jar包(因网站对附件大小的限制，现将所需jar包分两部分上传。位置分别为http://zhizizhishou0104.iyunv.com/blog/1993956 和http://zhizizhishou0104.iyunv.com/blog/1993988 )
2.编写entity，这里以一对多关系为例
ClassRoom.java(one端)
import java.util.List;
import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.Table;
@Entity
@Table(name="CLASS_ROOM")
public class ClassRoom {
@Id
private int id;
private String classroom_number;
private String classroom_name;
@OneToMany(cascade=CascadeType.ALL,mappedBy="classRoom")
private List<Student> students;
//这里省略setter和getter
}
Student.java(many端)
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
@Entity
@Table(name="STUDENT")
public class Student {
@Id
private int id;
private String stu_number;
private String stu_name;
@ManyToOne(fetch=FetchType.LAZY)
@JoinColumn(updatable=false,nullable=false)
private ClassRoom classRoom;
//这里省略setter和getter
}
3.dao层
import javax.annotation.Resource;
import org.hibernate.SessionFactory;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
import org.springframework.stereotype.Repository;
import com.aia.domain.ClassRoom;
@Repository
public class ClassRoomDao extends HibernateDaoSupport{
@Resource
public void setHibenrateSessionFactory(SessionFactory sessionFactory) {
super.setSessionFactory(sessionFactory);
}
public ClassRoom saveClassRoom(ClassRoom classRoom) {
getHibernateTemplate().persist(classRoom);
return classRoom;
}
}
4.service层(这里跳过接口,直接上传实现类)
import javax.annotation.Resource;
import org.springframework.stereotype.Service;
import com.aia.dao.ClassRoomDao;
import com.aia.domain.ClassRoom;
import com.aia.service.ClassRoomService;
@Service
public class ClassRoomServiceImpl implements ClassRoomService {
@Resource
private ClassRoomDao classRoomDao;
@Override
public ClassRoom saveClassRoom(ClassRoom classRoom) {
return classRoomDao.saveClassRoom(classRoom);
}
}
5.测试类
import java.util.ArrayList;
import java.util.List;
import org.junit.Test;
import org.springframework.test.AbstractTransactionalSpringContextTests;
import com.aia.domain.ClassRoom;
import com.aia.domain.Student;
import com.aia.service.ClassRoomService;
public class ClassRoomServiceImplTest extends AbstractTransactionalSpringContextTests{
@Override
protected String[] getConfigLocations() {
return new String[] {"applicationContext.xml"};
}
private ClassRoomService classRoomService;
public void setClassRoomService(ClassRoomService classRoomService) {
this.classRoomService = classRoomService;
}
@Test
public void testSaveClassRoom(){
ClassRoom classRoom = new ClassRoom();
classRoom.setClassroom_name("classroom_name");
classRoom.setClassroom_number("123");
Student student1 = new Student();
student1.setStu_name("student_name1");
student1.setStu_number("1001");
student1.setId(5);
student1.setClassRoom(classRoom);
Student student2 = new Student();
student2.setStu_name("student_name2");
student2.setStu_number("1002");
student2.setId(6);
student2.setClassRoom(classRoom);
List<Student> lists = new ArrayList<Student>();
lists.add(student1);
lists.add(student2);
classRoom.setStudents(lists);
classRoomService.saveClassRoom(classRoom);
//测试类注意要手动提交事务
setComplete();
}
}
测试类中也可以使用如下方法获取bean
BeanFactory beanFactory = new ClassPathXmlApplicationContext("applicationContext.xml");
classRoomService = (ClassRoomService)beanFactory.getBean("classRoomService");
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