spring data jpa容易案例

spring data jpa简单案例
pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.chen</groupId>
  <artifactId>spring_datajpa_demo01</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  <build/>
  <properties>
  	<spring.version>3.1.2.RELEASE</spring.version>
  </properties>
  <dependencies>
 	<!-- spring -->
	  <dependency>
		<groupId>org.springframework</groupId>
		<artifactId>spring-context-support</artifactId>
		<version>${spring.version}</version>
	 </dependency>
	  <dependency>
		<groupId>org.springframework</groupId>
		<artifactId>spring-webmvc</artifactId>
		<version>${spring.version}</version>
	 </dependency>
	  <dependency>
		<groupId>org.springframework</groupId>
		<artifactId>spring-test</artifactId>
		<version>${spring.version}</version>
	 </dependency>
	   	<dependency>
  		<groupId>org.springframework</groupId>
  		<artifactId>spring-orm</artifactId>
  		<version>${spring.version}</version>
  	 </dependency>
  	<dependency>
		<groupId>org.springframework.data</groupId>
		<artifactId>spring-data-jpa</artifactId>
		<version>1.1.0.RELEASE</version>
	</dependency>
	<dependency>
		<groupId>org.hibernate</groupId>
		<artifactId>hibernate-entitymanager</artifactId>
		<version>4.3.10.Final</version>
	</dependency>
	<dependency>
		<groupId>junit</groupId>
		<artifactId>junit</artifactId>
		<version>4.12</version>
	</dependency>
	<!-- mysql连接 -->
	<dependency>
		<groupId>mysql</groupId>
		<artifactId>mysql-connector-java</artifactId>
		<version>5.1.34</version>
	</dependency>
	
	<!-- slf4j-log4j -->
    <dependency>  
        <groupId>org.slf4j</groupId>  
        <artifactId>slf4j-api</artifactId>  
        <version>1.7.2</version>  
    </dependency>  
    <dependency>  
        <groupId>org.slf4j</groupId>  
        <artifactId>slf4j-log4j12</artifactId>  
        <version>1.7.2</version>  
    </dependency>  
	<dependency>
		<groupId>log4j</groupId>
		<artifactId>log4j</artifactId>
		<version>1.2.17</version>
	</dependency>
	<dependency>
		<groupId>commons-logging</groupId>
		<artifactId>commons-logging</artifactId>
		<version>1.1.1</version>
	</dependency>
	<dependency>
		<groupId>commons-dbcp</groupId>
		<artifactId>commons-dbcp</artifactId>
		<version>1.4</version>
	</dependency>
  </dependencies>
</project>

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context"   
    xmlns:mvc="http://www.springframework.org/schema/mvc"
   	xmlns:aop="http://www.springframework.org/schema/aop" 
   	xmlns:tx="http://www.springframework.org/schema/tx"
   	xmlns:jpa="http://www.springframework.org/schema/data/jpa"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd  
    	http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
    	http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
    	http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
    	http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa.xsd
    	">
    <context:component-scan base-package="com.chen"></context:component-scan>
    <!-- 加载配置文件 -->
    <context:property-placeholder location="classpath:dbSources.properties"/>	
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
    	<property name="driverClassName" value="${jdbc.driver}" />
    	<property name="url" value="${jdbc.url}" />
    	<property name="username" value="${jdbc.username}" />
    	<property name="password" value="${jdbc.password}" />
    </bean>
    <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
    	<property name="dataSource" ref="dataSource" />
    	<property name="packagesToScan" value="com.chen.pojo" /> 
    	<property name="persistenceProvider">
    		 <bean class="org.hibernate.ejb.HibernatePersistence"/> 
    	</property>
    </bean>
    
   <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
    	<property name="entityManagerFactory" ref="entityManagerFactory" />
    </bean>
    
    <tx:annotation-driven transaction-manager="transactionManager"/>
      
     <jpa:repositories base-package="com.chen.repository" />
    
</beans>

repository

package com.chen.repository;
import java.util.List;

import org.springframework.data.repository.CrudRepository;

import com.chen.pojo.User;

public interface UserRepository extends CrudRepository<User,Long>{
	public List<User> findAll();
}