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Ubuntu环境下Sping3+Hibername3.6（Jpa）整合

 
阅读更多
linux下的Java开发环境折腾完了。在实际的项目开发过程中对JPA一直是情有独钟，今下午在家在linux环境下折腾了下Spring3+Hibernate3.6（Jpa）的整合，做了一个小DEMO。其实跟在XP环境下开发是大同小异，冇的什么神奇的地方。
1.环境的搭建
直接上图吧。有图有真相，来的更是在
首先是简单项目图结构，注意项目包的命名规范，清晰简单明了易懂。

Sping+Jpa 所需要的jar，这是一般开发者比较好奇的地方。刚学框架都一大堆的jar都直接往工程中放，也不知道一个所以然，老师说能用让工程能跑起来就行。对初学着当然是可行，但搞明白，心里更踏实  
在写这个DEMO的时候都是从官网上来下的jar，一个个来整的做到jar的最简化。这里有不再折腾来，不是很清楚就度娘谷姐了。其实我是的。网络资源共享，浩瀚无边。





2.数据库实体类
所谓Spring+JPA整合，数据库实体当然是使用JPA的注解来玩来。 
package com.tq.bean.user;
import java.io.Serializable;
import java.util.Date;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;

@Entity
@NamedQueries( {
		// 查询所以数据项
		@NamedQuery(name = "Buyer.list", query = "SELECT b FROM Buyer b"),
		// 查询数据项总数
		@NamedQuery(name = "Buyer.count", query = "SELECT count(b.id) FROM Buyer b"),
		// 查询此数据项是否存在
		@NamedQuery(name = "Buyer.exists", query = "SELECT count(b.id) FROM Buyer b WHERE b.username = :username") })
public class Buyer implements Serializable {

	private static final long serialVersionUID = 8394979715028899027L;

	public static final String QUERY_LIST = "Buyer.list";

	public static final String QUERY_COUNT = "Buyer.count";

	public static final String QUERY_EXISTS = "Buyer.exists";
	@Id
	@GeneratedValue(strategy = GenerationType.IDENTITY)
	@Column(name = "id", nullable = false)
	private Long id;

	/** 用户名 **/

	@Column(length = 18)
	private String username;// 只允许字母/数字/下划线

	/** 密码 **/
	@Column(length = 32, nullable = false)
	private String password;

	/** 真实姓名 **/
	@Column(length = 8)
	private String realname;

	/** 邮箱 **/
	@Column(length = 50, nullable = false)
	private String email;

	/** 是否启动 **/
	@Column(nullable = false)
	private Boolean visible = true;

	/** 注册时间 **/
	@Temporal(TemporalType.TIMESTAMP)
	@Column(nullable = false)
	private Date regTime = new Date();

	public Buyer() {
	}

	public Buyer(String username) {
		this.username = username;
	}

	public Buyer(String username, String password) {
		this.username = username;
		this.password = password;
	}

	public Buyer(String username, String password, String email) {
		this.username = username;
		this.password = password;
		this.email = email;
	}

	public Long getId() {
		return id;
	}

	public void setId(Long id) {
		this.id = id;
	}

	public Date getRegTime() {
		return regTime;
	}

	public void setRegTime(Date regTime) {
		this.regTime = regTime;
	}

	public String getUsername() {
		return username;
	}

	public void setUsername(String username) {
		this.username = username;
	}

	public String getPassword() {
		return password;
	}

	public void setPassword(String password) {
		this.password = password;
	}

	public String getRealname() {
		return realname;
	}

	public void setRealname(String realname) {
		this.realname = realname;
	}

	public String getEmail() {
		return email;
	}

	public void setEmail(String email) {
		this.email = email;
	}

	public void setVisible(Boolean visible) {
		this.visible = visible;
	}
}

3.配置文件
beans.xml 
<?xml version="1.0" encoding="UTF-8"?>
	<!-- 资源类配置文件 -->
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
	xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="http://www.springframework.org/schema/beans 
	http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
	http://www.springframework.org/schema/aop 
	http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
    http://www.springframework.org/schema/tx 
    http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
    http://www.springframework.org/schema/context 
    http://www.springframework.org/schema/context/spring-context-3.0.xsd">

	<context:component-scan base-package="com.tq" />
	<context:property-placeholder location="classpath:jdbc.properties" />
	
	<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
		destroy-method="close">
		<property name="driverClassName" value="${jdbc.driverClassName}" />
		<property name="url" value="${jdbc.url}" />
		<property name="username" value="${jdbc.username}" />
		<property name="password" value="${jdbc.password}" />
		<property name="maxActive" value="100" />
		<property name="maxWait" value="1000" />
		<property name="poolPreparedStatements" value="true" />
		<property name="defaultAutoCommit" value="true" />
	</bean>

	<!-- 类工厂由spring管理 -->
	<bean id="entityManagerFactory"
		class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
		<property name="persistenceXmlLocation" value="classpath:META-INF/persistence.xml" />
		<property name="persistenceUnitName" value="springJpa" />
		<!-- 注入数据源bean到实体管理工厂bean -->
		<property name="dataSource" ref="dataSource" />
		<property name="loadTimeWeaver">
			<!-- 运行时植入 -->
		<bean class="org.springframework.instrument.classloading.InstrumentationLoadTimeWeaver" />
		</property>
	</bean>
	<!-- 事务由spring管理 -->
	<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
		<property name="entityManagerFactory">
			<ref bean="entityManagerFactory" />
		</property>
	</bean>
	<!-- 事务声明方式是注解 -->
	<tx:annotation-driven transaction-manager="transactionManager" />
	<!-- 自动装载EntityManager -->
	<context:annotation-config />
</beans>

web.xml 
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
	id="WebApp_ID" version="2.5">
	<display-name>springJpa</display-name>
	<welcome-file-list>
		<welcome-file>index.html</welcome-file>
		<welcome-file>index.htm</welcome-file>
		<welcome-file>index.jsp</welcome-file>
		<welcome-file>default.html</welcome-file>
		<welcome-file>default.htm</welcome-file>
		<welcome-file>default.jsp</welcome-file>
	</welcome-file-list>
	<!-- log4j 必须要在最前面 -->
	<context-param>
		<param-name>log4jConfigLocation</param-name>
		<param-value>classpath:log4j.properties</param-value>
	</context-param>
	<context-param>
		<param-name>log4jRefreshInterval</param-name>
		<param-value>60000</param-value>
	</context-param>
	<listener>
		<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
	</listener>
	<context-param>
		<param-name>webAppRootKey</param-name>
		<param-value>webApp.root</param-value>
	</context-param>

	<!-- Spring初始化 -->
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<!-- <param-value> /WEB-INF/classes/**/applicationContext*.xml </param-value> -->
		<param-value>/WEB-INF/beans.xml</param-value>

	</context-param>

	<!-- Spring的监听 对Spring容器进行实例化 ,并把實例化存放在application的屬性中 -->
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>

	<!--过滤器 -->
	<filter>
		<filter-name>encoding</filter-name>
		<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
		<init-param>
			<param-name>encoding</param-name>
			<param-value>UTF-8</param-value>
		</init-param>
		<init-param>
			<param-name>forceEncoding</param-name>
			<param-value>true</param-value>
		</init-param>
	</filter>
	<filter-mapping>
		<filter-name>encoding</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>

	<filter>
		<filter-name>Spring OpenEntityManagerInViewFilter</filter-name>
		<filter-class>org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter</filter-class>
		<init-param>
			<param-name>entityManagerFactoryBeanName</param-name>
			<param-value>entityManagerFactory</param-value>
		</init-param>
	</filter>
	<filter-mapping>
		<filter-name>Spring OpenEntityManagerInViewFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>

</web-app>

4.测试文件 

/**

 * @Title: BuyerTest.java

 * @Package: cn.itcast.junit.test

 * @Description: TODO(用一句话描述该文件做什么)

 * @author: 何枫

 * @date: 2011-8-11 下午07:57:31

 * @version: V1.0

 */

package com.tq.junit.test;



import org.junit.After;

import org.junit.AfterClass;

import org.junit.Before;

import org.junit.BeforeClass;

import org.junit.Test;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;



import com.tq.bean.user.Buyer;

import com.tq.service.buyer.BuyerService;



/**

 * @Title: BuyerTest.java

 * @Package: cn.itcast.junit.test

 * @Description: TODO(用一句话描述该文件做什么)

 * @author: 何枫

 * @date: 2011-8-11 下午07:57:31

 * @version: V1.0

 */

public class BuyerTest {



	public BuyerTest() {

	}



	@BeforeClass

	public static void setUpClass() throws Exception {

	}



	@AfterClass

	public static void tearDownClass() throws Exception {

	}



	@Before

	public void setUp() {

	}



	@After

	public void tearDown() {

	}



	@Test

	public void save() {

		System.out.println("测试Spring3.05+JPA（Hibernate3.6）环境");

		ApplicationContext cxt = new ClassPathXmlApplicationContext("beans.xml");

		BuyerService buyerService = (BuyerService) cxt.getBean("buyerServiceBean");

		for (int i = 0; i < 4; i++) {

			buyerService.save(new Buyer("ASAPX5" + i, "1987",

					"xiangyunzkf.net163@.com"));

		}



	}



}

直接上图：


5.注意
在linux中终端是分大小写的。所以在建数据库的时候注意大小写的区分。因为也是才刚开始来玩linux，不是很在行，也是在测试的时候出错来才有所了解与收获。
DEMO有想要的可以来call。




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