SSSP — 環境搭建

概述

• 涉及技術

  1. SpringMVC、Spring、SpringData/JPA 整合完成CRUD、翻頁
  2. 基於Restful風格
  3. 使用JPA二級緩存
  4. 使用@PesponseBody註解完成Ajax

• 搭建環境
  1. 配置Spring
  2. 配置SpringMVC
  3. 加入JPA
  4. 加入SpringData

• web.xml

  spring配置

<!-- 1. 配置spring ： 配置啓動IOC 容器的 Listener -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

springMVC的配置

<!--2 .配置springMVC 相關 -->
    <servlet>
        <servlet-name>springDispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
        <!-- 定位springMvc 配置文件的位置, 另一種方法：servletname-servlet.xml 默認位置 默認在WEB-INFO下 
            <init-param> <param-name>contextConfigLocation</param-name> <param-value>location</param-value> 
            </init-param> -->
    </servlet>
    <servlet-mapping>
        <servlet-name>springDispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

字符編碼過濾器

<!--3. 配置字符編碼過濾器 必須配置在所有過濾器的最前面() 獲取請求參數 或 讀取之前被調用否則無效 HiddenHttpMethodFilter 
        在執行前會調用getFilter 將導致此過濾器無效 -->
    <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>

Resetful風格支持

<!-- 4. 配置可以把POST 請求轉化爲PUT DELETE 請求的FILTER 風格 -->
    <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>

• applicationContext.xml

<!--配置自動掃描的包 -->
    <context:component-scan base-package="com.atguigu.sssp">
        <context:exclude-filter type="annotation"
            expression="org.springframework.stereotype.Controller" />
        <context:exclude-filter type="annotation"
            expression="org.springframework.web.bind.annotation.ControllerAdvice" />
    </context:component-scan>

    <!--配置數據源 -->
    <context:property-placeholder location="classpath:db.propertiers" />

    <!-- 配置數據源 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="user" value="${jdbc.user}"></property>
        <property name="password" value="${jdbc.password}"></property>
        <property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>
        <property name="driverClass" value="${jdbc.driverClass}"></property>
    </bean>

    <!--配置 entityManagerFactory -->
    <bean id="entityManagerFactory"
    class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
        <property name="dataSource" ref="dataSource"></property>
        <property name="jpaVendorAdapter">
            <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"></bean>      
        </property>
        <!--自動去掃描哪些 帶有@entity 註解 的包 -->
      <property name="packagesToScan" value="com.atguigu.sssp"></property>
      <property name="jpaProperties">
              <props>


                <!-- 生成的數據表的列的映射策略 -->  
                <prop key="hibernate.ejb.naming_strategy">org.hibernate.cfg.ImprovedNamingStrategy</prop>  
                <!-- hibernate 基本屬性 -->  
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</prop>  
                <prop key="hibernate.show_sql">true</prop>  
                <prop key="hibernate.format_sql">true</prop>  
                <prop key="hibernate.hbm2ddl.auto">update</prop>  


                 <!-- 二級緩存相關 -->  
                <prop key="hibernate.cache.use_second_level_cache">true</prop>
                <prop key="hibernate.cache.region.factory_class">org.hibernate.cache.ehcache.EhCacheRegionFactory</prop>  
                <prop key="hibernate.cache.use_query_cache">true</prop>

              </props>


      </property>
      <!--如何用二級緩存 
         1. 配置相關屬性
         2.添加配置文件
         3.在需要緩存的bean上添加註解
         4.需要自定義一個JPQL語句 ,讓後設置一個setHint
      ENABLE_SELECTIVE ：表使只緩存添加了@Cacheable 註解的bean
      -->
      <property name="sharedCacheMode" value="ENABLE_SELECTIVE"></property>


    </bean>
      <!-- 配置事務 -->
      <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
        <property name="entityManagerFactory" ref="entityManagerFactory"></property>
      </bean>

      <!-- 配置支持註解的事務 -->
      <tx:annotation-driven transaction-manager="transactionManager"/>

      <!-- 配置spring Data -->
      <jpa:repositories base-package="com.atguigu.sssp"
      entity-manager-factory-ref="entityManagerFactory"></jpa:repositories>

springDispatcherServlet-servlet.xml

<!-- 配置自動掃描的包 -->
    <context:component-scan base-package="com.atguigu.sssp" use-default-filters="false">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
        <context:include-filter type="annotation" expression="org.springframework.web.bind.annotation.ControllerAdvice"/>
    </context:component-scan>

    <!-- 配置視圖解析器 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/views/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>
    <!--處理靜態資源  -->
    <mvc:default-servlet-handler/>
    <mvc:annotation-driven></mvc:annotation-driven>