Spring5学习笔记4——MVC框架整合

本是古典何须时尚 2023-10-05 11:27 16阅读 0赞

## Spring5学习笔记4——MVC框架整合 ##

#### 文章目录 ####

*  Spring5学习笔记4——MVC框架整合
 *   *  第四部分：MVC框架整合
     *   *  第一章、MVC框架整合思想
         *   *  1. 搭建Web运行环境
             *  2. 为什么要整合MVC框架
             *  3. Spring可以整合哪些MVC框架?
             *  4. Spring整合MVC框架的核心思路
             *   *  4.1 web环境下的工厂创建：
                 *  4.2 代码整合
         *  第二章、Spring与Struts2框架整合 (选学)
         *   *  1. Spring与Struts2整合思路分析：
             *  2. Spring与Struts2整合的编码实现
             *  3. Spring+Struts2+Mybatis整合(SSM)
             *   *  1. 思路分析
                 *  2. 整合编码
             *  4. Spring开发过程中多配置文件的处理

### 第四部分：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>
    
    
    <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>
    
    
    <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可以整合哪些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 #####

###### 4.1 web环境下的工厂创建： ######

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 WebXmlApplicationContext("/applicationContext.xml");
           
            ServletContextListener ---> ApplicationContext ctx = new WebXmlApplicationContext("/applicationContext.xml");
            ServletContextListener 在ServletContext对象创建的同时，被调用(且只会被调用一次) ，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 WebXmlApplicationContext("/applicationContext.xml");
                 ServletContext.setAttribute("xxx",ctx) (共用)
                 
     4. Spring封装了一个ContextLoaderListener实现了ServletContextListener接口，它有以下作用：
         1. 创建工厂。
         2. 把工厂存在ServletContext域中。

<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>

###### 4.2 代码整合 ######

依赖注入：把Sevice对象注入个控制器对象。

![image-20200520143653347][]

#### 第二章、Spring与Struts2框架整合 (选学) ####

##### 1. Spring与Struts2整合思路分析： #####

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 #####

*  搭建开发环境
    
     *  引入相关jar (Spring Struts2)
        
            <dependency>
              <groupId>org.apache.struts</groupId>
              <artifactId>struts2-spring-plugin</artifactId>
              <version>2.3.8</version>
            </dependency>
     *  引入对应的配置文件
        
         *  applicationContext.xml
         *  struts.xml
         *  log4j.properties
     *  初始化配置
        
            <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>
        
         *  Spring (ContextLoaderListener —> Web.xml)
         *  Struts2(Filter —> Web.xml)
 *  编码
    
     *  开发Service对象
        
            最终在Spring配置文件中创建Service对象
            <bean id="userService" class="com.baizhi.struts2.UserServiceImpl"/>
     *  开发Action对象
        
         *  开发类
            
                public class RegAction implements Action{
                          
                   private UserService userService;
                   set get
                     
                   public String execute(){
                          
                       userService.register();
                       return Action.SUCCESS;
                   }
                }
         *  Spring (applicationContext.xml)
            
                <bean id="regAction" class="com.baizhi.struts2.RegAction" scope="prototype">
                    <property name="userService" ref=""/>
                </bean
         *  Struts2(struts.xml)
            
                <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 ######

*  搭建开发环境
    
     *  引入相关jar (Spring Struts2 Mybatis)
        
            <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>
            
            
            <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>
            
            
            <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>
     *  引入对应的配置文件
        
         *  applicationContext.xml
         *  struts.xml
         *  log4j.properties
         *  xxxxMapper.xml
     *  初始化配置
        
         *  Spring (ContextLoaderListener —> Web.xml)
         *  Struts2(Filter —> 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>
            
            <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>
 *  编码
    
     *  DAO (Spring+Mybatis)
        
            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
     *  Service (Spring添加事务)
        
            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
     *  Controller (Spring+Struts2)
        
            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 #####

实战中会根据需要，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

*  通配符方式
    
        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>
 *  import标签
    
        applicationContext.xml中添加以下标签：（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>

[image-20200520143653347]: https://img-blog.csdnimg.cn/img_convert/3b1ba7d781c037e37b708e96ab5b056e.png