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1. Integration principle of SSH three frameworks

  • Spring’s integration with Struts2 gives the Action object to the Spring container to create.

  • Spring’s integration with Hibernate gives SessionFactory maintenance to the Spring container, which takes care of Session maintenance and associated AOP transactions.

2. Spring integrates Hibernate framework

(1) Create a Web project and import the JAR packages required by Spring and Hibernate frameworks, as shown below:

(2) Separately configure the Spring container as follows:

applicationContext.xml

  • Create a configuration file and import constraints

<? The XML version = "1.0" encoding = "utf-8"? ><beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd "> < / beans >Copy the code

web.xml

  • Configure Spring to start with the project

<! -- Let spring create a listener with web startup --> <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>Copy the code

(3) Configure Hibernate separately

  • Write entity classes and ORM metadata

  • Configure the master profile

hibernate.cfg.xml

<? The XML version = "1.0" encoding = "utf-8"? > <! DOCTYPE hibernate-configuration PUBLIC "-// hibernate /Hibernate Configuration DTD 3.0//EN" "Http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd" > < hibernate configuration - > < session - factory > <! - database Driver - > < property name = "hibernate. Connection. Driver_class" > com. Mysql.. JDBC Driver < / property > <! <property name="hibernate.connection.url"> JDBC :mysql:///hbDB</property> <! - the connection to the database user name - > < property name = "hibernate. Connection. The username" > root < / property > <! - password database connection - > < property name = "hibernate. Connection. Password" > root < / property > <! -- Database dialect note: MYSQL when choosing dialect, please select one of the shortest dialect. -- -- > < property name = "hibernate. The dialect" > org. Hibernate. The dialect. MySQLDialect < / property > <! <property name="hibernate.show_sql">true</property> <! <property name=" hibernate.format_SQL ">true</property> <! Export table structure automatically. <property name=" hibernate.hbm2dcl. auto">update</property> <! <mapping resource="com/spring/domain/*.hbm.xml" /> <mapping resource="com/spring/domain/*.hbm.xml" /> <mapping resource="com/spring/domain/*.hbm.xml" /> </session-factory></hibernate-configuration>Copy the code

(4) Spring integrates Hibernate

  • Configure the SessionFactory in the Spring container

<! <bean name="sessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean" > <! <property name="dataSource" ></property> <! <property name="hibernateProperties"> <props> <! -- Mandatory configuration --> <! -- <prop key="hibernate.connection.driver_class" >com.mysql.jdbc.Driver</prop> <prop key="hibernate.connection.url" >jdbc:mysql:///crm_32</prop> <prop key="hibernate.connection.username" >root</prop> <prop key="hibernate.connection.password" >1234</prop> --> <prop key="hibernate.dialect" >org.hibernate.dialect.MySQLDialect</prop> <! -- Optional configuration --> <prop key="hibernate.show_sql" >true</prop> <prop key="hibernate.format_sql" >true</prop> <prop key="hibernate.hbm2ddl.auto" >update</prop> </props> </property> <! - introduction of orm metadata, specify orm metadata package path, spring will automatically read all the configuration in the package - > < property name = "mappingDirectoryLocations" value="classpath:com/spring/domain" ></property> </bean>Copy the code

(5) Spring integrates Hibernate environment operation database

  • Create a Dao class that inherits HibernateDaoSupport

  • Configure the Action Service DAO in Spring

<! -- action --> <! <bean name="*Action" class="com.spring.web.action.*Action" scope="prototype" > <property name="*Service" ref="*Service" ></property> </bean> <! -- service --> <bean name="*Service" class="com.spring.service.impl.*ServiceImpl" > <property name="*demo" ref="*Dao" ></property> </bean> <! -- dao --> <bean name="*Dao" class="com.spring.dao.impl.*DaoImpl" > <! <property name="sessionFactory" ></property> </bean>Copy the code

  • Use hibernate templates for detailed operations

Recommended reading:

  • Transaction management for the Spring Framework family

  • Spring framework family JDBC integration

  • The Spring Framework family of AOP ideas

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