SSJ(Spring+SpringMvc+JPA)集成
一. pom.xml(导包,插件配置)
导包
1<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>4.3.8.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>4.3.8.Final</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency>
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.2.2</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.8</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.6.5</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>4.3.8.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>4.3.8.Final</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency>
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.2.2</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.8</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.6.5</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
</dependencies>
更改JDK版本
org.apache.maven.plugins maven-compiler-plugin 3.1 1.8 1.8
二. SpringMVC+JPA的集成
2.1 创建jdbc.properties文件(数据库连接信息)
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3
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jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql:///ssj
jdbc.username=root
jdbc.password=123456
2.2 创建applicationContext.xml
2.2.1 配置数据源
<context:property-placeholder location=“classpath:jdbc.properties”/>
2.2.2 配置entityManagerFactory
</bean>
</property>
</bean>
2.2.3 扫描Spring的注解
<context:component-scan base-package=“cn.pj.ssj.dao.impl”/>
<context:component-scan base-package=“cn.pj.ssj.service.impl”/>
2.3 dao层
@Repository
public class ProductDaoImpl implements IProductDao {
/**
* PersistenceContext:持久上下文
* 上下文(一次请求(线程))只有一个EntityManager
* xml配置的是LocalContainerEntityManagerFactoryBean,如果上下文中没有EntityManager,就创建
* 如果有,就直接拿
*/
@PersistenceContext
private EntityManager entityManager;
@Override
public void save(Product product) {
entityManager.persist(product);
}
2.4 事务管理器配置
<tx:annotation-driven transaction-manager=“transactionManager”/>
2.5 service层
事务加在service层
propagation:事务传播机制
REQUIRED(默认配置):如果调用我的方法是有事务的,那么我们就使用同一个事务
REQUIRES_NEW: 不管谁调用我,我都会开一个自己的新事务
NEVER: 绝对不开事务,看到事务就报错给你看
SUPPORTS: 支持(调用我的方法有事务,就有,如果没有事务,就算了)
@Service
@Transactional//表示这个类的所有方法加上事务
public class ProductServiceImpl implements IProductService {
查询不加事务
//表示不加事务
/**
*
*/
@Transactional(readOnly = true,propagation = Propagation.SUPPORTS)
public Product findOne(Serializable id) {
return productDao.findOne(id);
}
三. Spring+SpringMVC集成
上面已经集成了JPA了,在此基础上集成SpringMVC
3.1 创建applicationContext-mvc.xml
<context:component-scan base-package=“cn.pj.ssj.controller”/>
3.2 web.xml配置
注意:要用2.4版本以上的,否则不支持EL表达式
<?xml version="1.0" encoding="UTF-8"?>
<!--spring配置文件-->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<!--springmvc核心控制器配置-->
dispatcherServlet org.springframework.web.servlet.DispatcherServlet contextConfigLocation classpath:applicationContext-mvc.xml 1 dispatcherServlet /
<filter>
<filter-name>characterEncodingFilter</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>
<!--表示不论有没有编码,都会强制转-->
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>characterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>