Spring一套全通5—SSM整合

百知教育 — Spring系列课程 — MVC框架整合

第一章、MVC框架整合思想

1. 搭建Web运行环境

<dependency>

  <groupId>javax.servlet</groupId>

  <artifactId>javax.servlet-api</artifactId>

  <version>3.1.0</version>

  <scope>provided</scope>

</dependency>
<dependency>

  <groupId>javax.servlet</groupId>

  <artifactId>jstl</artifactId>

  <version>1.2</version>

</dependency>
<!-- https://mvnrepository.com/artifact/javax.servlet.jsp/javax.servlet.jsp-api -->

<dependency>

  <groupId>javax.servlet.jsp</groupId>

  <artifactId>javax.servlet.jsp-api</artifactId>

  <version>2.3.1</version>

  <scope>provided</scope>

</dependency>
<dependency>

  <groupId>org.springframework</groupId>

  <artifactId>spring-web</artifactId>

  <version>5.1.14.RELEASE</version>

</dependency>
<dependency>

  <groupId>org.springframework</groupId>

  <artifactId>spring-core</artifactId>

  <version>5.1.14.RELEASE</version>

</dependency>
<dependency>

  <groupId>org.springframework</groupId>

  <artifactId>spring-beans</artifactId>

  <version>5.1.14.RELEASE</version>

</dependency>
<dependency>

  <groupId>org.springframework</groupId>

  <artifactId>spring-tx</artifactId>

  <version>5.1.14.RELEASE</version>

</dependency>
<dependency>

  <groupId>org.springframework</groupId>

  <artifactId>spring-jdbc</artifactId>

  <version>5.1.14.RELEASE</version>

</dependency>
<dependency>

  <groupId>org.mybatis</groupId>

  <artifactId>mybatis-spring</artifactId>

  <version>2.0.2</version>

</dependency>
<dependency>

  <groupId>com.alibaba</groupId>

  <artifactId>druid</artifactId>

  <version>1.1.18</version>

</dependency>
<dependency>

  <groupId>mysql</groupId>

  <artifactId>mysql-connector-java</artifactId>

  <version>5.1.48</version>

</dependency>
<dependency>

  <groupId>org.mybatis</groupId>

  <artifactId>mybatis</artifactId>

  <version>3.4.6</version>

</dependency>
<dependency>

  <groupId>junit</groupId>

  <artifactId>junit</artifactId>

  <version>4.11</version>

  <scope>test</scope>

</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->

<dependency>

  <groupId>org.springframework</groupId>

  <artifactId>spring-context</artifactId>

  <version>5.1.4.RELEASE</version>

</dependency>
<dependency>

  <groupId>org.springframework</groupId>

  <artifactId>spring-aop</artifactId>

  <version>5.1.14.RELEASE</version>

</dependency>
<dependency>

  <groupId>org.aspectj</groupId>

  <artifactId>aspectjrt</artifactId>

  <version>1.8.8</version>

</dependency>
<dependency>

  <groupId>org.aspectj</groupId>

  <artifactId>aspectjweaver</artifactId>

  <version>1.8.3</version>

</dependency>
<dependency>

  <groupId>org.slf4j</groupId>

  <artifactId>slf4j-log4j12</artifactId>

  <version>1.7.25</version>

</dependency>
<dependency>

  <groupId>log4j</groupId>

  <artifactId>log4j</artifactId>

  <version>1.2.17</version>

</dependency>

2. 为什么要整合MVC框架

1. MVC框架提供了控制器(Controller)调用Service

   DAO ---》 Service

2. 请求响应的处理

3. 接受请求参数 request.getParameter("")

4. 控制程序的运行流程

5. 视图解析 (JSP JSON Freemarker Thyemeleaf )

3. Spring可以整合那些MVC框架

1. struts1

2. webwork

3. jsf

4. struts2

5. springMVC

4.Spring整合MVC框架的核心思路

1. 准备工厂

1. Web开发过程中如何创建工厂

      ApplicationContext ctx = new ClassPathXmlApplicationContext("/applicationContext.xml");

                                   WebXmlApplicationContext()

2. 如何保证工厂唯一同时被共用

   被共用：Web request|session|ServletContext(application)

   工厂存储在ServletContext这个作用域中 ServletContext.setAttribute("xxxx",ctx);
唯一：ServletContext对象 创建的同时 ---》 ApplicationContext ctx = new ClassPathXmlApplicationContext("/applicationContext.xml");
ServletContextListener ---> ApplicationContext ctx = new ClassPathXmlApplicationContext("/applicationContext.xml");

        ServletContextListener 在ServletContext对象创建的同时，被调用(只会被调用一次) ，把工厂创建的代码，写在ServletContextListener中，也会保证只调用

        一次，最终工厂就保证了唯一性

 3. 总结

      ServletContextListener(唯一)

             ApplicationContext ctx = new ClassPathXmlApplicationContext("/applicationContext.xml");

             ServletContext.setAttribute("xxx",ctx) (共用)
4. Spring封装了一个ContextLoaderListener

     1. 创建工厂

     2. 把工厂存在ServletContext中

ContextLoaderListener使用方式 
web.xml
<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>

2. 代码整合

依赖注入：把Sevice对象注入个控制器对象。

第二章、Spring与Struts2框架整合 (选学)

1. Spring与Struts2整合思路分析

1. Struts2中的Action需要通过Spring的依赖注入获得Service对象。

2. Spring与Struts2整合的编码实现

<dependency>

  <groupId>org.apache.struts</groupId>

  <artifactId>struts2-spring-plugin</artifactId>

  <version>2.3.8</version>

</dependency>

<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>
<filter>

  <filter-name>struts2</filter-name>

  <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>

</filter>

<filter-mapping>

  <filter-name>struts2</filter-name>

  <url-pattern>/*</url-pattern>

</filter-mapping>

最终在Spring配置文件中创建Service对象

<bean id="userService" class="com.baizhi.struts2.UserServiceImpl"/>

public class RegAction implements Action{

   private UserService userService;

   set get
public String execute(){

       userService.register();

       return Action.SUCCESS;

   }

}

<bean id="regAction" class="com.baizhi.struts2.RegAction" scope="prototype">

    <property name="userService" ref=""/>

</bean

<package name="ssm" extends="struts-default">

  url reg.action  ---> 会接受到用户的请求后，创建RegAction这个类的对象 进行相应的处理
<action name="reg" class="regAction">

    <result name="success">/index.jsp</result>

  </action>

</package>

3. Spring+Struts2+Mybatis整合(SSM)

1. 思路分析

SSM = Spring+Struts2  Spring+Mybatis

2. 整合编码

    <dependency>

      <groupId>org.apache.struts</groupId>

      <artifactId>struts2-spring-plugin</artifactId>

      <version>2.3.8</version>

    </dependency>
<dependency>

      <groupId>javax.servlet</groupId>

      <artifactId>javax.servlet-api</artifactId>

      <version>3.1.0</version>

      <scope>provided</scope>

    </dependency>
<dependency>

      <groupId>javax.servlet</groupId>

      <artifactId>jstl</artifactId>

      <version>1.2</version>

    </dependency>
<!-- https://mvnrepository.com/artifact/javax.servlet.jsp/javax.servlet.jsp-api -->

    <dependency>

      <groupId>javax.servlet.jsp</groupId>

      <artifactId>javax.servlet.jsp-api</artifactId>

      <version>2.3.1</version>

      <scope>provided</scope>

    </dependency>
<dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-web</artifactId>

      <version>5.1.14.RELEASE</version>

    </dependency>
<dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-core</artifactId>

      <version>5.1.14.RELEASE</version>

    </dependency>
<dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-beans</artifactId>

      <version>5.1.14.RELEASE</version>

    </dependency>
<dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-tx</artifactId>

      <version>5.1.14.RELEASE</version>

    </dependency>
<dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-jdbc</artifactId>

      <version>5.1.14.RELEASE</version>

    </dependency>
<dependency>

      <groupId>org.mybatis</groupId>

      <artifactId>mybatis-spring</artifactId>

      <version>2.0.2</version>

    </dependency>
<dependency>

      <groupId>com.alibaba</groupId>

      <artifactId>druid</artifactId>

      <version>1.1.18</version>

    </dependency>
<dependency>

      <groupId>mysql</groupId>

      <artifactId>mysql-connector-java</artifactId>

      <version>5.1.48</version>

    </dependency>
<dependency>

      <groupId>org.mybatis</groupId>

      <artifactId>mybatis</artifactId>

      <version>3.4.6</version>

    </dependency>
<dependency>

      <groupId>junit</groupId>

      <artifactId>junit</artifactId>

      <version>4.11</version>

      <scope>test</scope>

    </dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->

    <dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-context</artifactId>

      <version>5.1.4.RELEASE</version>

    </dependency>
<dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-aop</artifactId>

      <version>5.1.14.RELEASE</version>

    </dependency>
<dependency>

      <groupId>org.aspectj</groupId>

      <artifactId>aspectjrt</artifactId>

      <version>1.8.8</version>

    </dependency>
<dependency>

      <groupId>org.aspectj</groupId>

      <artifactId>aspectjweaver</artifactId>

      <version>1.8.3</version>

    </dependency>
<dependency>

      <groupId>org.slf4j</groupId>

      <artifactId>slf4j-log4j12</artifactId>

      <version>1.7.25</version>

    </dependency>
<dependency>

      <groupId>log4j</groupId>

      <artifactId>log4j</artifactId>

      <version>1.2.17</version>

    </dependency>

<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>
<filter>

  <filter-name>struts2</filter-name>

  <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>

</filter>

<filter-mapping>

<filter-name>struts2</filter-name>

  <url-pattern>/*</url-pattern>

</filter-mapping>

1. 配置文件的配置

   1. DataSource

   2. SqlSessionFactory ----> SqlSessionFactoryBean

      1. dataSource

      2. typeAliasesPackage

      3. mapperLocations

   3. MapperScannerConfigur ---> DAO接口实现类

2. 编码

   1. entity

   2. table

   3. DAO接口

   4. 实现Mapper文件

1. 原始对象 ---》 注入DAO

2. 额外功能 ---》 DataSourceTransactionManager ---> dataSource

3. 切入点 + 事务属性

   @Transactional(propagation,readOnly...)

4. 组装切面

   <tx:annotation-driven

1. 开发控制器 implements Action 注入Service

2. Spring的配置文件

    1. 注入 Service

    2. scope = prototype

3. struts.xml

    <action class="spring配置文件中action对应的id值"/>

4. Spring开发过程中多配置文件的处理

Spring会根据需要，把配置信息分门别类的放置在多个配置文件中，便于后续的管理及维护。
DAO  ------  applicationContext-dao.xml

Service ---  applicationContext-service.xml

Action  ---  applicationContext-action.xml
注意：虽然提供了多个配置文件，但是后续应用的过程中，还要进行整合

1. 非web环境

   ApplicationContext ctx = new ClassPathXmlApplicationContext("/applicationContext-*.xml");

2. web环境

   <context-param>

       <param-name>contextConfigLocation</param-name>

       <param-value>classpath:applicationContext-*.xml</param-value>

   <context-param>

applicationContext.xml 目的 整合其他配置内容

    <import resource="applicationContext-dao.xml " />

    <import resource="applicationContext-service.xml " />

    <import resource="applicationContext-action.xml " />
1. 非web环境

   ApplicationContext ctx = new ClassPathXmlApplicationContext("/applicationContext.xml");

2. web环境

   <context-param>

       <param-name>contextConfigLocation</param-name>

       <param-value>classpath:applicationContext.xml</param-value>

   <context-param>