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

Posted on 2009-11-22 filed under: Java (RSS) 112 views

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.<a href="http://www.codeweblog.com/tag/persistence/" class="internal_tag" title="Posts tagged with persistence">persistence</a>.Column; import javax.<a href="http://www.codeweblog.com/tag/persistence/" class="internal_tag" title="Posts tagged with persistence">persistence</a>.Entity; import javax.<a href="http://www.codeweblog.com/tag/persistence/" class="internal_tag" title="Posts tagged with persistence">persistence</a>.GeneratedValue; import javax.<a href="http://www.codeweblog.com/tag/persistence/" class="internal_tag" title="Posts tagged with persistence">persistence</a>.Id; @Entity public class Student { private Integer stuId; private String <a href="http://www.codeweblog.com/tag/stuname/" class="internal_tag" title="Posts tagged with stuname">stuName</a>; public Student() {} public Student(String <a href="http://www.codeweblog.com/tag/stuname/" class="internal_tag" title="Posts tagged with stuname">stuName</a>) { this.<a href="http://www.codeweblog.com/tag/stuname/" class="internal_tag" title="Posts tagged with stuname">stuName</a> = <a href="http://www.codeweblog.com/tag/stuname/" class="internal_tag" title="Posts tagged with stuname">stuName</a>; } @Id @GeneratedValue public Integer getStuId() { return stuId; } <a href="http://www.codeweblog.com/tag/public-void/" class="internal_tag" title="Posts tagged with public void">public void</a> setStuId(Integer stuId) { this.stuId = stuId; } @Column(length=20,nullable=true) <a href="http://www.codeweblog.com/tag/public-string/" class="internal_tag" title="Posts tagged with public string">public String</a> getStuName() { return <a href="http://www.codeweblog.com/tag/stuname/" class="internal_tag" title="Posts tagged with stuname">stuName</a>; } <a href="http://www.codeweblog.com/tag/public-void/" class="internal_tag" title="Posts tagged with public void">public void</a> setStuName(String <a href="http://www.codeweblog.com/tag/stuname/" class="internal_tag" title="Posts tagged with stuname">stuName</a>) { this.<a href="http://www.codeweblog.com/tag/stuname/" class="internal_tag" title="Posts tagged with stuname">stuName</a> = <a href="http://www.codeweblog.com/tag/stuname/" class="internal_tag" title="Posts tagged with stuname">stuName</a>; } }

package com.zyg.ssj.dao; <a href="http://www.codeweblog.com/tag/import-java/" class="internal_tag" title="Posts tagged with import java">import java</a>.util.List; import com.zyg.ssj.bean.Student; <a href="http://www.codeweblog.com/tag/public-interface/" class="internal_tag" title="Posts tagged with public interface">public interface</a> StudentDao { /** * 保存学生信息 * @param student */ <a href="http://www.codeweblog.com/tag/public-abstract-void/" class="internal_tag" title="Posts tagged with public abstract void">public abstract void</a> save(Student student); /** * 根据学号删除学生信息 * @param studentId */ <a href="http://www.codeweblog.com/tag/public-abstract-void/" class="internal_tag" title="Posts tagged with public abstract void">public abstract void</a> delete(Integer studentId); /** * 根据学生删除学生信息 * @param studentId */ <a href="http://www.codeweblog.com/tag/public-abstract-void/" class="internal_tag" title="Posts tagged with public abstract void">public abstract void</a> delete(Student student); /** * 更新学生信息 * @param student */ <a href="http://www.codeweblog.com/tag/public-abstract-void/" class="internal_tag" title="Posts tagged with public abstract void">public abstract void</a> 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&<a href="http://www.codeweblog.com/tag/lt/" class="internal_tag" title="Posts tagged with lt">lt</a>;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.<a href="http://www.codeweblog.com/tag/jpa/" class="internal_tag" title="Posts tagged with jpa">jpa</a>; <a href="http://www.codeweblog.com/tag/import-java/" class="internal_tag" title="Posts tagged with import java">import java</a>.util.List; import javax.<a href="http://www.codeweblog.com/tag/persistence/" class="internal_tag" title="Posts tagged with persistence">persistence</a>.EntityManager; import javax.<a href="http://www.codeweblog.com/tag/persistence/" class="internal_tag" title="Posts tagged with persistence">persistence</a>.PersistenceContext; <a href="http://www.codeweblog.com/tag/import-org/" class="internal_tag" title="Posts tagged with import org">import org</a>.springframework.transaction.annotation.Propagation; <a href="http://www.codeweblog.com/tag/import-org/" class="internal_tag" title="Posts tagged with import org">import org</a>.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.<a href="http://www.codeweblog.com/tag/jpa/" class="internal_tag" title="Posts tagged with jpa">jpa</a>.StudentDao#save(com.zyg.ssj.bean.Student) */ <a href="http://www.codeweblog.com/tag/public-void/" class="internal_tag" title="Posts tagged with public void">public void</a> save(Student student){ System.out.println(student.getStuName()); em.persist(student); } /* (non-Javadoc) * @see com.zyg.ssj.dao.<a href="http://www.codeweblog.com/tag/jpa/" class="internal_tag" title="Posts tagged with jpa">jpa</a>.StudentDao#delete(java.lang.Integer) */ <a href="http://www.codeweblog.com/tag/public-void/" class="internal_tag" title="Posts tagged with public void">public void</a> delete(Integer studentId){ em.remove(em.getReference(Student.class, studentId)); } /* (non-Javadoc) * @see com.zyg.ssj.dao.<a href="http://www.codeweblog.com/tag/jpa/" class="internal_tag" title="Posts tagged with jpa">jpa</a>.StudentDao#delete(com.zyg.ssj.bean.Student) */ <a href="http://www.codeweblog.com/tag/public-void/" class="internal_tag" title="Posts tagged with public void">public void</a> delete(Student student){ em.remove(em.getReference(Student.class, student.getStuId())); } /* (non-Javadoc) * @see com.zyg.ssj.dao.<a href="http://www.codeweblog.com/tag/jpa/" class="internal_tag" title="Posts tagged with jpa">jpa</a>.StudentDao#update(com.zyg.ssj.bean.Student) */ <a href="http://www.codeweblog.com/tag/public-void/" class="internal_tag" title="Posts tagged with public void">public void</a> update(Student student){ em.merge(student); } /* (non-Javadoc) * @see com.zyg.ssj.dao.<a href="http://www.codeweblog.com/tag/jpa/" class="internal_tag" title="Posts tagged with jpa">jpa</a>.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.<a href="http://www.codeweblog.com/tag/jpa/" class="internal_tag" title="Posts tagged with jpa">jpa</a>.StudentDao#getStudents() */ @SuppressWarnings("unchecked") @Transactional(propagation=Propagation.NOT_SUPPORTED,readOnly=true) public List&<a href="http://www.codeweblog.com/tag/lt/" class="internal_tag" title="Posts tagged with lt">lt</a>;Student> getStudents(){ return (List&<a href="http://www.codeweblog.com/tag/lt/" class="internal_tag" title="Posts tagged with lt">lt</a>;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: