(5) ebj學習:ejb用jpa操作資料庫1
阿新 • • 發佈:2018-12-25
一 JPA開發持久化Bean
二 配置資料來源
三 新建Ejb專案
四 指定JNDI資料來源
五 編寫entity bean
六 程式碼
1 目錄結構
2 Person.java
3 persistence.xmlimport javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; @Entity public class Person { @Id @GeneratedValue private int id; private String name; public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } }
<?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_2_0.xsd" version="2.0"> <persistence-unit name="EjbLession6_jpa" transaction-type="JTA"> <jta-data-source>java:/MySqlDS</jta-data-source> <properties> <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect" /> <property name="hibernate.hbm2ddl.auto" value="update"/> </properties> </persistence-unit> </persistence>
4 執行結果
啟動JBoss後, JPA自動與資料庫進行對映