SpringData系列一 Spring Data的环境搭建

  本节作为主要讲解Spring Data的环境搭建

  • JPA Spring Data :致力于减少数据访问层(DAO)的开发量。开发者唯一要做的就是声明持久层的接口,其他都交给Spring Data JPA来帮你完成!
  • 使用Spring Data JPA进行持久层开发需要的四个步骤:
  1. 配置Spring 整合 JPA
  2. 在Spring配置文件中配置Spring Data,让Spring 为声明的接口创建代理对象。配置了<jpa:repositories>后,Spring 初始化容器时将会扫描base-package 指定的包目录及其子目录,为继承Repository或其子接口的接口创建代理对象,并将代理对象注册为SpringBean,业务层便可以通过Spring的自动封装的特性来直接使用该对象。
  3. 声明持久层的接口,该接口继承Repository。Repository是一个标记型接口,它不包含任何方法,如必要,Spring Data 可实现Repository其他子接口,其中定义了一些常用的增删改查,以及分页相关的方法。
  4. 在接口中声明需要的方法。Spring Data将根据给定的策略,来为其生成实现代码。
  • 环境搭建

   1.所需要的包

    ① 加入spring包

      spring-aop-4.3.8.RELEASE.jar
      spring-aspects-4.3.8.RELEASE.jar
      spring-beans-4.3.8.RELEASE.jar
      spring-context-4.3.8.RELEASE.jar
      spring-core-4.3.8.RELEASE.jar
      spring-expression-4.3.8.RELEASE.jar
      spring-jdbc-4.3.8.RELEASE.jar
      spring-orm-4.3.8.RELEASE.jar
      spring-tx-4.3.8.RELEASE.jar
      spring-web-4.3.8.RELEASE.jar
      spring-webmvc-4.3.8.RELEASE.jar
      com.springsource.net.sf.cglib-2.2.0.jar
      com.springsource.org.aopalliance-1.0.0.jar
      com.springsource.org.aspectj.weaver-1.6.8.RELEASE.jar
      commons-logging-1.1.1.jar
    ② 加入hibernate包
      antlr-2.7.7.jar
      dom4j-1.6.1.jar
      hibernate-commons-annotations-4.0.5.Final.jar
      hibernate-core-4.3.11.Final.jar
      hibernate-jpa-2.1-api-1.0.0.Final.jar
      jandex-1.1.0.Final.jar
      javassist-3.18.1-GA.jar
      jboss-logging-3.1.3.GA.jar
      jboss-logging-annotations-1.2.0.Beta1.jar
      jboss-transaction-api_1.2_spec-1.0.0.Final.jar
    ③ 加jpa的包
      hibernate-entitymanager-4.3.11.Final.jar
    ④ 加c3p0的包
      c3p0-0.9.2.1.jar
      hibernate-c3p0-4.3.11.Final.jar
      mchange-commons-java-0.2.3.4.jar
    ⑤ 加mysql的驱动
      mysql-connector-java-5.1.7-bin.jar
    ⑥加入springData 
      spring-data-commons-1.6.2.RELEASE.jar
      spring-data-jpa-1.4.2.RELEASE.jar
    ⑦加入 slf4j-api-1.6.1.jar

  2.Spring Bean配置文件

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
 4     xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jpa="http://www.springframework.org/schema/data/jpa"
 5     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
 6         http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
 7         http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd
 8         http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">
 9     <context:property-placeholder location="classpath:db.properties" />
10     <!--配置数据源 -->
11     <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
12         <property name="user" value="${jdbc.user}"></property>
13         <property name="password" value="${jdbc.password}"></property>
14         <property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>
15         <property name="driverClass" value="${jdbc.driverClass}"></property>
16     </bean>
17     <!--配置JPA的entityManagerFactory -->
18     <bean id="entityManagerFactory"
19         class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
20         <property name="dataSource" ref="dataSource"></property>
21         <!-- 配置JPA的实现 -->
22         <property name="jpaVendorAdapter">
23             <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"></bean>
24         </property>
25         <property name="packagesToScan" value="com.ntjr.springdata"></property>
26         <property name="jpaProperties">
27             <props>
28                 <!-- 二级缓存相关 -->
29                 <!-- <prop key="hibernate.cache.region.factory_class">org.hibernate.cache.ehcache.EhCacheRegionFactory</prop> 
30                     <prop key="net.sf.ehcache.configurationResourceName">ehcache-hibernate.xml</prop> -->
31                 <!-- 生成的数据表的列的映射策略 -->
32                 <prop key="hibernate.ejb.naming_strategy">org.hibernate.cfg.ImprovedNamingStrategy</prop>
33                 <!-- hibernate 基本属性 -->
34                 <prop key="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</prop>
35                 <prop key="hibernate.show_sql">true</prop>
36                 <prop key="hibernate.format_sql">true</prop>
37                 <prop key="hibernate.hbm2ddl.auto">update</prop>
38             </props>
39         </property>
40     </bean>
41     <!--配置事物管理器 -->
42     <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
43         <property name="entityManagerFactory" ref="entityManagerFactory"></property>
44     </bean>
45     <!-- 配置支持注解的事物 -->
46     <tx:annotation-driven transaction-manager="transactionManager" />
47     <!--配置springData -->
48     <!--base-package:扫描Repository Bean所在的package -->
49     <jpa:repositories base-package="com.ntjr.springdata"
50         entity-manager-factory-ref="entityManagerFactory"
51         transaction-manager-ref="transactionManager">
52     </jpa:repositories>
53 </beans>
applicationContext.xml

  3.数据库持久类

 1 package com.ntjr.springdata;
 2 
 3 import java.util.Date;
 4 
 5 import javax.persistence.Column;
 6 import javax.persistence.Entity;
 7 import javax.persistence.GeneratedValue;
 8 import javax.persistence.Id;
 9 import javax.persistence.Table;
10 
11 @Table(name = "JPA_PERSONS")
12 @Entity
13 public class Person {
14 
15     private Integer id;
16     private String lastName;
17 
18     private String email;
19     private Date birth;
20 
21     @GeneratedValue
22     @Id
23     public Integer getId() {
24         return id;
25     }
26 
27     public void setId(Integer id) {
28         this.id = id;
29     }
30 
31     public String getLastName() {
32         return lastName;
33     }
34 
35     @Column(name = "LAST_NAME")
36     public void setLastName(String lastName) {
37         this.lastName = lastName;
38     }
39 
40     public String getEmail() {
41         return email;
42     }
43 
44     public void setEmail(String email) {
45         this.email = email;
46     }
47 
48     public Date getBirth() {
49         return birth;
50     }
51 
52     public void setBirth(Date birth) {
53         this.birth = birth;
54     }
55 
56     @Override
57     public String toString() {
58         return "Person [id=" + id + ", lastName=" + lastName + ", email=" + email + ", birth=" + birth + "]";
59     }
60     
61 
62 }
Person.java

  4.DAO

 1 package com.ntjr.springdata;
 2 
 3 import org.springframework.data.repository.Repository;
 4 
 5 /**
 6  * 
 7  * 1、实现Repository接口 
 8  * 2、通过注解的方式@RepositoryDefinition将一个bean定义为Repository接口
 9  */
10 public interface PersonRepsitory extends Repository<Person, Integer> {
11     // 根据lastName获取对应的person
12     Person getByLastName(String lastName);
13 }
PersonRepository.java

  5.测试

 1 package com.ntjr.springdata.test;
 2 
 3 import org.junit.Test;
 4 import org.springframework.context.ApplicationContext;
 5 import org.springframework.context.support.ClassPathXmlApplicationContext;
 6 
 7 import com.ntjr.springdata.Person;
 8 import com.ntjr.springdata.PersonRepsitory;
 9 
10 public class SpringDataTest {
11 
12     private ApplicationContext ctx = null;
13     {
14         ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
15     }
16 
17     @Test
18     public void getPersonForLastName() {
19         PersonRepsitory personRepsitory = ctx.getBean(PersonRepsitory.class);
20         Person person = personRepsitory.getByLastName("AA");
21         System.out.println(person);
22     }
23 
24 
25 
26 }
SpringDataTest.java

 

posted @ 2017-05-14 22:54  IT-執念  阅读(939)  评论(0编辑  收藏