SpringData环境搭建

Bertha 。 2024-04-18 12:35 54阅读 0赞

**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 Spring Bean，业务层便可以通过 Spring 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（具体策略稍后讲解）来为其生成实现代码。

**applicationContext.xml:**

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xmlns:context="http://www.springframework.org/schema/context"
           xmlns:tx="http://www.springframework.org/schema/tx"
           xmlns:jpa="http://www.springframework.org/schema/data/jpa"
           xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
    		http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd
    		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
    		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">
    
        <context:component-scan base-package="com.qst.springdata"/>
    
    <context:property-placeholder location="classpath:db.properties"/>
        <bean id="dataSource"
              class="com.mchange.v2.c3p0.ComboPooledDataSource">
            <property name="user" value="${jdbc.user}"></property>
            <property name="password" value="${jdbc.password}"></property>
            <property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>
            <property name="driverClass" value="${jdbc.driverClass}"></property>
         </bean>
    
    
    
        
        <bean id="entityManagerFactory"
              class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
            <property name="dataSource" ref="dataSource"></property>
            <property name="jpaVendorAdapter">
                <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"></bean>
            </property>
            <property name="packagesToScan" value="com.qst.springdata"></property>
            <property name="jpaProperties">
                <props>
                    
                    
                    
                    <prop key="hibernate.ejb.naming_strategy">org.hibernate.cfg.ImprovedNamingStrategy</prop>
                    
                    <prop key="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</prop>
                    <prop key="hibernate.show_sql">true</prop>
                    <prop key="hibernate.format_sql">true</prop>
                    <prop key="hibernate.hbm2ddl.auto">update</prop>
                </props>
            </property>
        </bean>
    
        
    
    
    
        <bean class="org.springframework.orm.jpa.JpaTransactionManager" id="transactionManager">
    
        <property name="entityManagerFactory" ref="entityManagerFactory"/>
    
        </bean>
    
        
    
        <tx:annotation-driven transaction-manager="transactionManager"/>
        
        
        
        <jpa:repositories base-package="com.qst.springdata"
                          entity-manager-factory-ref="entityManagerFactory"></jpa:repositories>
    
    
    </beans>

pom.xml

<properties>
            <spring.version>4.2.4.RELEASE</spring.version>
            <hibernate.version>5.0.7.Final</hibernate.version>
            <slf4j.version>1.6.6</slf4j.version>
            <log4j.version>1.2.12</log4j.version>
            <c3p0.version>0.9.1.2</c3p0.version>
            <mysql.version>5.1.6</mysql.version>
            <maven.compiler.source>1.7</maven.compiler.source>
            <maven.compiler.target>1.7</maven.compiler.target>
        </properties>
        <dependencies>
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>4.12</version>
                <scope>test</scope>
            </dependency>
            
            <dependency>
                <groupId>org.aspectj</groupId>
                <artifactId>aspectjweaver</artifactId>
                <version>1.6.8</version>
            </dependency>
            <dependency>
                <groupId>c3p0</groupId>
                <artifactId>c3p0</artifactId>
                <version>0.9.1.2</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-aop</artifactId>
                <version>${spring.version}</version>
            </dependency>
    
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context-support</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-orm</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-beans</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-core</artifactId>
                <version>${spring.version}</version>
            </dependency>
            
            
            <dependency>
                <groupId>org.hibernate</groupId>
                <artifactId>hibernate-core</artifactId>
                <version>${hibernate.version}</version>
            </dependency>
            <dependency>
                <groupId>org.hibernate</groupId>
                <artifactId>hibernate-entitymanager</artifactId>
                <version>${hibernate.version}</version>
            </dependency>
            <dependency>
                <groupId>org.hibernate</groupId>
                <artifactId>hibernate-validator</artifactId>
                <version>5.2.1.Final</version>
            </dependency>
            
            <dependency>
                <groupId>com.mchange</groupId>
                <artifactId>c3p0</artifactId>
                <version>0.9.5.2</version>
            </dependency>
            <dependency>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
                <version>${log4j.version}</version>
            </dependency>
            <dependency>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-api</artifactId>
                <version>1.7.26</version>
            </dependency>
    
            <dependency>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-log4j12</artifactId>
                <version>${slf4j.version}</version>
            </dependency>
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>8.0.17</version>
            </dependency>
            <dependency>
                <groupId>org.springframework.data</groupId>
                <artifactId>spring-data-jpa</artifactId>
                <version>1.9.0.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-test</artifactId>
                <version>4.2.4.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>javax.el</groupId>
                <artifactId>javax.el-api</artifactId>
                <version>2.2.4</version>
            </dependency>
            <dependency>
                <groupId>org.glassfish.web</groupId>
                <artifactId>javax.el</artifactId>
                <version>2.2.4</version>
            </dependency>
        </dependencies>

db.properties

jdbc.user=root
    jdbc.password=root
    jdbc.driverClass=com.mysql.cj.jdbc.Driver
    jdbc.jdbcUrl=jdbc:mysql://localhost:3306/jpa?useUnicode=true&characterEncoding=utf-8&serverTimezone=GMT%2B8