Spring2.5 + Struts1.3.8 + JPA (Hibernate to achieve) the integration of three

Reprint please specify: from http://blog.csdn.net/M_ChangGong/ Author: Zhang Yan Kwong

The preparation of the article the main entity bean and the DAO layer.

Created in the src package com.zyg.ssj.bean, and in the preparation of the package type Student, such documents as follows:

package com.zyg.ssj.bean; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; @Entity public class Student { private Integer stuId; private String stuName; public Student() {} public Student(String stuName) { this.stuName = stuName; } @Id @GeneratedValue public Integer getStuId() { return stuId; } public void setStuId(Integer stuId) { this.stuId = stuId; } @Column(length=20,nullable=true) public String getStuName() { return stuName; } public void setStuName(String stuName) { this.stuName = stuName; } }

package com.zyg.ssj.dao; import java.util.List; import com.zyg.ssj.bean.Student; public interface StudentDao { /** * 保存学生信息 * @param student */ public abstract void save(Student student); /** * 根据学号删除学生信息 * @param studentId */ public abstract void delete(Integer studentId); /** * 根据学生删除学生信息 * @param studentId */ public abstract void delete(Student student); /** * 更新学生信息 * @param student */ public abstract void update(Student student); /** * 根据学号获取学生信息 * @param studentId */ public abstract Student getStudent(Integer studentId); /** * 获取全部学生信息 * @param studentId */ @SuppressWarnings("unchecked") public abstract List<Student> getStudents(); }

Created in the src package com.zyg.ssj.dao.jpa, and in the package to create the implementation class StudentDao interface StudentDaoImpl, such documents as follows:

package com.zyg.ssj.dao.jpa; import java.util.List; import javax.persistence.EntityManager; import javax.persistence.PersistenceContext; import org.springframework.transaction.annotation.Propagation; import org.springframework.transaction.annotation.Transactional; import com.zyg.ssj.bean.Student; import com.zyg.ssj.dao.StudentDao; @Transactional public class StudentDaoImpl implements StudentDao { @PersistenceContext private EntityManager em; /* (non-Javadoc) * @see com.zyg.ssj.dao.jpa.StudentDao#save(com.zyg.ssj.bean.Student) */ public void save(Student student){ System.out.println(student.getStuName()); em.persist(student); } /* (non-Javadoc) * @see com.zyg.ssj.dao.jpa.StudentDao#delete(java.lang.Integer) */ public void delete(Integer studentId){ em.remove(em.getReference(Student.class, studentId)); } /* (non-Javadoc) * @see com.zyg.ssj.dao.jpa.StudentDao#delete(com.zyg.ssj.bean.Student) */ public void delete(Student student){ em.remove(em.getReference(Student.class, student.getStuId())); } /* (non-Javadoc) * @see com.zyg.ssj.dao.jpa.StudentDao#update(com.zyg.ssj.bean.Student) */ public void update(Student student){ em.merge(student); } /* (non-Javadoc) * @see com.zyg.ssj.dao.jpa.StudentDao#getStudent(java.lang.Integer) */ @Transactional(propagation=Propagation.NOT_SUPPORTED,readOnly=true) public Student getStudent(Integer studentId){ return em.find(Student.class, studentId); } /* (non-Javadoc) * @see com.zyg.ssj.dao.jpa.StudentDao#getStudents() */ @SuppressWarnings("unchecked") @Transactional(propagation=Propagation.NOT_SUPPORTED,readOnly=true) public List<Student> getStudents(){ return (List<Student>)em.createQuery("select s from Student s") .getResultList(); } }

Thus, the entity bean and the DAO layer code completion, we are prepared under a service layer code.

Code have been prepared, but is now very sleepy, and then write it tomorrow.

Created in the src package com.zyg.ssj.dao, and in the interface package created StudentDao, the interface file as follows:

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