1.首先導入jar包放入lib目錄下:java
hibernate3.jar lib\jpa\hibernate-jpa-2.0-api-1.0.0.Final.jar lib\required\antlr-2.7.6.jar lib\required\commons-collections-3.1.jar lib\required\dom4j-1.6.1.jar lib\required\javassist-3.12.0.GA.jar lib\required\jta-1.1.jar lib\required\slf4j-api-1.6.1.jar 另外,還須要你用到的數據庫的JDBC驅動程序包。本文用的是Mysql,所以還有一個mysql-connector-java-5.1.12-bin.jar。
2.新建配置文件 persistence.xml:
mysql
src下必須有一個META-INF文件夾,並且persistence.xml必須在其內,文件名必須相同
<?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="chenyue" transaction-type="RESOURCE_LOCAL"> <!-- <jta-data-source>java:/DefaultDS</jta-data-source> --> <properties> <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect"/> <property name="hibernate.hbm2ddl.auto" value="update"/> <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/> <property name="hibernate.connection.username" value="root"/> <property name="hibernate.connection.password" value="123"/> <property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/chydb?useUnicode=true&characterEncoding=UTF-8"/> </properties> </persistence-unit> </persistence>
3.新建基本類用來測試:
sql
package com.itcast.bean.product; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; @Entity //標註其是一個實體bean public class ProductType { private Integer typeid; @Id //對象標示符 @GeneratedValue(strategy=GenerationType.AUTO) //數據庫中採用主鍵自增加 public Integer getTypeid() { return typeid; } public void setTypeid(Integer typeid) { this.typeid = typeid; } }
4.用JUnit單元來測試:數據庫
package junit.test; import javax.persistence.EntityManagerFactory; import javax.persistence.Persistence; import org.junit.BeforeClass; import org.junit.Test; public class ProductTest { @BeforeClass public static void setUpBeforeClass(){ System.out.println("setUpBeforeClass"); } @Test public void jpaTest(){ EntityManagerFactory factory= Persistence.createEntityManagerFactory("itcast"); System.out.println(factory.toString()); } }