SSM整合

ゞ浴缸里的玫瑰 2024-04-19 08:49 7阅读 0赞

## springmvc(view 视图层) ,spring(service业务层) ,Mybatis (dao持久层) ##

1.**spring整合springmvc:**  
springmvc配置文件:

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
           xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context"
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xsi:schemaLocation="
            http://www.springframework.org/schema/beans
            http://www.springframework.org/schema/beans/spring-beans.xsd
            http://www.springframework.org/schema/mvc
            http://www.springframework.org/schema/mvc/spring-mvc.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context.xsd">
    
        
        <context:component-scan base-package="com.yc.controller">
           
    	
        </context:component-scan>
    
        
        <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <property name="prefix" value="/WEB-INF/pages/"/>
            <property name="suffix" value=".jsp"/>
        </bean>
    
        
        <mvc:resources location="/css/" mapping="/css/**" />
        <mvc:resources location="/images/" mapping="/images/**" />
        <mvc:resources location="/js/" mapping="/js/**" />
    
        
        <mvc:annotation-driven/>
    
    </beans>

web.xml的配置:

<?xml version="1.0" encoding="UTF-8"?>
    <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
      <display-name>web_sm</display-name>
      
      <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>HiddenHttpMethodFilter</filter-name>
      <filter-class>  org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
      </filter>
      <filter-mapping>
      <filter-name>HiddenHttpMethodFilter</filter-name>
      <url-pattern>/*</url-pattern>
      </filter-mapping>
     
     
     
      <servlet>
      <servlet-name>dispatcherServlet</servlet-name>
      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
       
      <init-param>
     
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:springmvc.xml</param-value>
      </init-param>
      
      <load-on-startup>1</load-on-startup>
      </servlet>
      <servlet-mapping>
      <servlet-name>dispatcherServlet</servlet-name>
      <url-pattern>/</url-pattern>
      
    
      </servlet-mapping>
    
     
      <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>
      </filter>
      <filter-mapping>
        <filter-name>characterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
      </filter-mapping>
    </web-app>

**web.xml内容解析:**  
**1.访问servlet时加载springmvc的配置文件**

<servlet>
      <servlet-name>dispatcherServlet</servlet-name>
      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
       
      <init-param>
     
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:springmvc.xml</param-value>
      </init-param>
      
      <load-on-startup>1</load-on-startup>//指服务器启动就立刻加载该servlet
      </servlet>

2.配置监听器,加载spring的配置文件,(springmvc的配置方法，只有在访问servlet时才会报错。因为此时才加载spring配置文件。但是后者监听器如果故意在配置文件中出现检查式错误，那么启动服务器时就会报错。因为监听器在服务器启动的时候也被启动此时也就开始加载spring配置文件。)

<listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
      </listener>
      
      <context-param>
        <param-name>contextConfigLocation</param-name>//contextConfigLocation不能改变
        <param-value>classpath:applicationContext.xml</param-value>
      </context-param>

**spring整合mybatis**  
1.spring配置文件applicationContext.xml(mybatis的配置文件整合在其中)

<context:property-placeholder location="classpath:db.properties"/>
     <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
         <property name="user" value="${username}"></property>
        <property name="password" value="${password}"></property>
         <property name="driverClass" value="${driver}"></property>
         <property name="jdbcUrl" value="${url}"></property>
     </bean>
    
        <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"></property>
        
        <property name="mapperLocations" value="classpath:com/yc/dao/*Mapper.xml" ></property>
        
        <property name="typeAliasesPackage" value="com.yc.po"></property>
        
        <property name="configuration" >
        <bean class="org.apache.ibatis.session.Configuration">
        <property name="mapUnderscoreToCamelCase" value="true"></property>
        </bean>
        
        </property>
        </bean>
        <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        
        <property name="basePackage" value="com.yc.dao"></property>
       
        
        </bean>