开发步骤
1.编写Person.java实体类
2.开发PersonService.java接口类
3.开发PersonServiceBean.java实现类
4.发布EntityBean.jar文件到jboss-4.2.3.GA-jdk6\jboss-4.2.3.GA\server\default\deploy\下
发布的文件只有Person.java、PersonService.java、PersonServiceBean.java、METH-INF/persistence.xml、jndi.properties等文件
5.编写mysql-ds.xml数据源文件,部署到jboss-4.2.3.GA-jdk6\jboss-4.2.3.GA\server\default\deploy\下
6.复制mysql-connector-java-5.1.8-bin.jar文件到jboss-4.2.3.GA-jdk6\jboss-4.2.3.GA\server\default\lib\下
7.编写juit的PersonServiceTest.java测试类
Person.java
package cn.cmcc.bean;
import java.io.Serializable;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table(name="person")
public class Person implements Serializable{
private static final long serialVersionUID = 7907974948739540719L;
@Id @Column(name="id") @GeneratedValue(strategy=GenerationType.AUTO)
private Integer id;
@Column(name="name",length=20,nullable=false)
private String name;
public Person(){}
public Person(String name){
this.name=name;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((id == null) ? 0 : id.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Person other = (Person) obj;
if (id == null) {
if (other.id != null)
return false;
} else if (!id.equals(other.id))
return false;
return true;
}
}
PersonService.java
package cn.cmcc.service;
import java.util.List;
import cn.cmcc.bean.Person;
public interface PersonService {
public void sava(Person person);
public void delete(Integer personId);
public void update(Person person);
public Person getPerson(Integer id);
public List<Person> persons();
}
PersonServiceBean.java
package cn.cmcc.service.impl;
import java.util.List;
import javax.ejb.Remote;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import cn.cmcc.bean.Person;
import cn.cmcc.service.PersonService;
@Stateless
@Remote
public class PersonServiceBean implements PersonService {
//会自动去classes/META-INF下读取persistence.xml,当persistence.xml中有多个unit时，需要指定PersistenceContext 中unitName属性的值
@PersistenceContext EntityManager em;
@Override
public void delete(Integer personId) {
em.remove(em.getReference(Person.class, personId));
}
@Override
public Person getPerson(Integer id) {
return em.find(Person.class, id);
}
@SuppressWarnings("unchecked")
@Override
public List<Person> persons() {
return em.createQuery("select o from Person o ").getResultList();
}
@Override
public void sava(Person person) {
em.persist(person);
}
@Override
public void update(Person person) {
em.merge(person);
}
}
persistence.xml
<?xml version="1.0"?>
<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="cmcc" transaction-type="JTA">
<jta-data-source>java:cmcc</jta-data-source>
<properties>
<property name="hibernate.hbm2ddl.auto" value="update" />
<!-- 显示最终执行的SQL -->
<property name="hibernate.show_sql" value="true" />
<!-- 格式化显示的SQL -->
<property name="hibernate.format_sql" value="true" />
</properties>
</persistence-unit>
</persistence>
jndi.properties
java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory
java.naming.provider.url=localhost:1099
PersonServiceTest.java
package junti.test;
import javax.naming.InitialContext;
import org.junit.BeforeClass;
import org.junit.Test;
import cn.cmcc.bean.Person;
import cn.cmcc.service.PersonService;
public class PersonServiceTest {
private static PersonService personService;
@BeforeClass
public static void setUpBeforeClass() throws Exception {
try {
InitialContext ctx = new InitialContext();
personService=(PersonService)ctx.lookup("PersonServiceBean/remote");
} catch (Exception e) {
e.printStackTrace();
}
}
@Test
public void testSava() {
personService.sava(new Person("春"));
}
@Test
public void testDelete() {
personService.delete(1);
}
@Test
public void testUpdate() {
Person person=personService.getPerson(1);
person.setName("chun");
personService.update(person);
}
@Test
public void testGetPerson() {
personService.getPerson(1);
}
@Test
public void testPersons() {
personService.persons();
}
}