myeclips8+jboss5+mysql5配置测试实体bean

最后的目录层次结构：



mysql数据库结构：



按目录层次，给出各个类文件：

Person.java:（此为

）

package com.ejb;
import java.io.Serializable; 
import java.util.Date; 
import javax.persistence.Column; 
import javax.persistence.Entity; 
import javax.persistence.GeneratedValue; 
import javax.persistence.Id; 
import javax.persistence.Table; 
 
@SuppressWarnings("serial") 
@Entity 
@Table(name = "Person") 
public class Person implements Serializable{ 
 
    private Integer personid; 
    private String name;     
    private boolean sex; 
    private Short age; 
    private Date birthday; 
   
    @Id 
    @GeneratedValue    
    public Integer getPersonid() { 
        return personid; 
    } 
    public void setPersonid(Integer personid) { 
        this.personid = personid; 
    }  
     
    @Column(name = "PersonName",nullable=false,length=32) 
    public String getName() { 
        return name; 
    } 
    public void setName(String name) { 
        this.name = name; 
    } 
     
    @Column(nullable=false) 
    public boolean getSex() { 
        return sex; 
    } 
    public void setSex(boolean sex) { 
        this.sex = sex; 
    } 
     
    @Column(nullable=false)    
    public Short getAge() { 
        return age; 
    } 
    public void setAge(Short age) { 
        this.age = age; 
    }  
     
    public Date getBirthday() { 
        return birthday; 
    } 
    public void setBirthday(Date birthday) { 
        this.birthday = birthday; 
    }    
}

PersonDAO.java:

package com.session;
import java.util.Date; 
import java.util.List; 
import com.ejb.Person; 
 
public interface PersonDAO { 
     
    public boolean insertPerson(String name, boolean sex,short age, Date birthday); 
    public String getPersonNameByID(int personid); 
    public boolean updatePerson(Person person); 
    public Person getPersonByID(int personid); 
    public List getPersonList(); 
}

PersonDAOBean.java:(此为

，用于测试实体bean)

package com.session;
import java.util.Date; 
import java.util.List; 
import javax.ejb.Remote; 
import javax.ejb.Stateless; 
import javax.persistence.EntityManager; 
import javax.persistence.PersistenceContext; 
import javax.persistence.Query; 
import com.session.PersonDAO; 
import com.ejb.Person; 
 
@Stateless 
@Remote ({PersonDAO.class}) 
public class PersonDAOBean implements PersonDAO { 
 
    @PersistenceContext 
    protected EntityManager em; 
 
    public String getPersonNameByID(int personid) { 
        Person person = em.find(Person.class, Integer.valueOf(personid)); 
        return person.getName(); 
    } 
    
    public boolean insertPerson(String name, boolean sex,short age, Date birthday) {
        try { 
            Person person = new Person(); 
            person.setName(name); 
            person.setSex(sex); 
            person.setAge(Short.valueOf(age)); 
            person.setBirthday(birthday); 
            em.persist(person); 
        } catch (Exception e) { 
            e.printStackTrace(); 
            return false; 
        }  
        return true; 
    } 
 
    public Person getPersonByID(int personid) {        
        return em.find(Person.class, Integer.valueOf(personid)); 
    } 
     
    public boolean updatePerson(Person person) { 
        try { 
            em.merge(person); 
        } catch (Exception e) { 
            e.printStackTrace(); 
            return false; 
        }  
        return true; 
    } 
     
    public List getPersonList() { 
        try { 
            Query query = em.createQuery("from Person p order by personid asc"); 
            List list = query. getResultList(); 
            em.clear();//分离内存中受EntityManager管理的实体bean，让VM进行垃圾回收 
            return list; 
             
        } catch (Exception e) { 
            e.printStackTrace(); 
            return null; 
        } 
    }  
}

然后创建一个web项目EntityBeanTest，在默认路径建一个jsp测试文件Test.jsp:





Test.jsp:

<%@ page contentType="text/html; charset=GBK"%> 
<%@ page import="com.session.*,  
        com.ejb.*, 
        javax.naming.*,  
        java.util.Properties,  
        java.util.Date, 
        java.util.List, 
        java.util.Iterator, 
        java.text.SimpleDateFormat"%> 
<% 
    Properties props = new Properties(); 
    props.setProperty("java.naming.factory.initial", "org.jnp.interfaces.NamingContextFactory"); 
    props.setProperty("java.naming.provider.url", "localhost:1099"); 
    props.setProperty("java.naming.factory.url.pkgs", "org.jboss.naming");  
 
    InitialContext ctx = new InitialContext(props); 
    try {      
      PersonDAO persondao = (PersonDAO) ctx.lookup("PersonDAOBean/remote"); 
      SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");      
      persondao.insertPerson("刘宽", true, (short)26,formatter.parse("1980-9-30"));//添加一个人 
      out.println(persondao.getPersonNameByID(1)); //取personid为1的人姓名 
 
      Person person = persondao.getPersonByID(1); //取personid为1的person,此时的person已经脱离容器的管理 
      person.setName("张小艳"); //把姓名改为张小艳 
      persondao.updatePerson(person); //更新person  
      out.println("<br> personid为1的person姓名已由“刘宽”改为“张小艳”<br>"); 

      List list = persondao.getPersonList(); //分页结果集
      if (list!=null){ 
        Iterator it = list.iterator(); 
        while (it.hasNext()) { 
          Person p = (Person)it.next(); 
          out.println("人员编号:"+ p.getPersonid() + "\t姓名："+ p.getName() + "<Br>"); 
        } 
      } 
    } catch (Exception e) { 
      out.println(e.getMessage()); 
    } 
%>

结出persistence.xml:

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
    http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" version="1.0">
    
	<persistence-unit name="entityPU" transaction-type="JTA">
  		<jta-data-source>java:/MySqlDS</jta-data-source>
	</persistence-unit>
  
</persistence>

最后，发布ejb和web项目，在地址栏输入：http://localhost:8080/EntityBeanTest/Test.jsp

在网页下的输出结果如下：

张小艳

personid 为1的person姓名已由“刘宽”改为“张小艳”

人员编号:1 姓名：张小艳



本人亲测可行！至于其他平台和不同版本的情况下可能会有问题，欢迎探讨！