三 SprigMvc与Mybatis整合&实现商品列表功能

思路：

Dao层：

1 逆向工程生成mapper及其配置文件以及pojo

2 SqlMapConfig.xml,空文件即可,需要文件头

3 applicationContext-dao.xml

a 数据库连接池

b SqlSessionFactory对象，需要Spring和Mybatis整合包

c 配置mapper文件扫描器

Service层：

1、applicationContext-service.xml  包扫描器，扫描@service注解的业务层类

2、applicaitonContext.xml:配置事务

Controller层：

SpringMvc.xml

1包扫描器，扫描@Controller注解的控制层类

2 配置注解驱动

3 配置视图解析器，url前缀和后缀

web.xml

1 配置Spring容量监听器

2 配置前端控制器

3 配置post方式编码

包结构：

配置：

Dao层：

/SpringMvc01/config/SqlMapConfig.xml

/SpringMvc01/config/spring/applicationContext-dao.xml：jdbc配置文件，数据库连接池，SQLSessionFactory(datasource,加载核心配置文件，包扫描)，动态代理（mapper文件扫描器）

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
    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-4.0.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">

   <!-- 加载配置文件 -->
   <context:property-placeholder location="classpath:jdbc.properties" />

    <!-- 数据库连接池 -->
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
        destroy-method="close">
        <property name="driverClassName" value="${driver}" />
        <property name="url" value="${url}" />
        <property name="username" value="${name}" />
        <property name="password" value="${password}" />
        <!-- 连接池的最大数据库连接数 -->
        <property name="maxActive" value="10" />
        <!-- 最大空闲数 -->
        <property name="maxIdle" value="5" />
    </bean>

    <!-- SqlSessionFactory配置 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <!-- 加载mybatis核心配置文件 -->
        <property name="configLocation" value="classpath:SqlMapConfig.xml" />
        <!-- 别名包扫描 -->
        <property name="typeAliasesPackage" value="com.springmvc01.pojo" />
    </bean>

    <!-- 动态代理，第二种方式：包扫描（推荐）： -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- basePackage多个包用","分隔 -->
        <property name="basePackage" value="com.springmvc01.mapper" />
    </bean>
</beans　　　　

Service层：

/SpringMvc01/config/spring/applicationContext-service.xml：开启Service包扫描器，直接在业务层类上添加注解@service,免去Spring容器管理的繁琐

/SpringMvc01/config/spring/applicationContext-trans.xml：配置事务管理器，事务的传播行为以及切面

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
    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-4.0.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">

    <!-- 事务管理器 -->
    <bean id="transactionManager"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!-- 数据源 -->
        <property name="dataSource" ref="dataSource" />
    </bean>

    <!-- 通知，事务的增强 -->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <!-- 传播行为   propagation="REQUIRED" ：默认，如果有，用当前事务，没有，新建事务 -->
            <tx:method name="save*" propagation="REQUIRED" />
            <tx:method name="insert*" propagation="REQUIRED" />
            <tx:method name="delete*" propagation="REQUIRED" />
            <tx:method name="update*" propagation="REQUIRED" />
            <tx:method name="find*" propagation="SUPPORTS" read-only="true" />
            <tx:method name="get*" propagation="SUPPORTS" read-only="true" />
            <tx:method name="query*" propagation="SUPPORTS" read-only="true" />
        </tx:attributes>
    </tx:advice>

    <!-- 切面 -->
    <aop:config>
        <aop:advisor advice-ref="txAdvice"
            pointcut="execution(* com.springmvc01.service.*.*(..))" />
    </aop:config>

</beans>

/SpringMvc01/src/com/springmvc01/service/impl/ItemServiceImpl.java：业务层方法，调用Dao实现相应的CRUD，返回给Controller

Controller层：

/SpringMvc01/config/spring/springmvc.xml：配置Controller包扫描，注解驱动（处理器映射器，处理器适配器，视图解析器）

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">

    <!-- 配置controller扫描包 -->
    <context:component-scan base-package="com.springmvc01.controller"/>

    <!-- 推荐使用：直接配置处理器适配器比较麻烦，可以配置注解驱动以替代之,对json数据响应提供支持-->
    <mvc:annotation-driven/>

    <!-- 配置视图解析器，配置前缀和后缀 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
       <property name="prefix" value="/WEB-INF/jsp/"/>
       <property name="suffix" value=".jsp"/>
    </bean>

    <!-- 配置处理器映射器 -->
    <!-- <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"/>
     -->
     <!-- 配置处理器适配器 -->
 <!--    <bean class="org.springframework.web.servlet.mvc.RequestMappingHandlerAdapter"/>
   -->
</beans>

/SpringMvc01/src/com/springmvc01/controller/ItemController.java：指定url，参数传递，页面跳转，实现和前端的交互

//注解控制器
@Controller
public class ItemController {

    @Autowired
    private ItemService itemService;

    //注解url
    @RequestMapping("/itemList.action")
    public ModelAndView itemList(){

        List<Item> list = itemService.getItemList();
        //创建ModelView用来存放数据和视图
        ModelAndView modelAndView = new ModelAndView();
        //设置数据到模型中
        modelAndView.addObject("itemList", list);
//        modelAndView.setViewName("/WEB-INF/jsp/itemList.jsp");
        //在SpringMVC核心配置文件里面配置前缀和后缀
        modelAndView.setViewName("itemList");
        return modelAndView;
    }

/*    @RequestMapping("itemEdit")
    //修改商品，根据查询商品跳转修改页面
    public ModelAndView itemEdit(HttpServletRequest request){
        String idStr = request.getParameter("id");
        ModelAndView modelAndView = new ModelAndView();
        //查询商品信息
        Item item = itemService.getItemById(new Integer(idStr));
        modelAndView.addObject("item", item);
        modelAndView.setViewName("itemEdit");
        return modelAndView;
    }*/

//    @RequestMapping("itemEdit")
    /**
     * 演示默认支持的参数传递
     * @param model
     * @param request
     * @param response
     * @param session
     * @return
     */
/*    public String itemEdit(Model model ,HttpServletRequest request , HttpServletResponse response , HttpSession session){
        String idStr = request.getParameter("id");
        System.out.println(request);
        System.out.println(response);
        System.out.println(session);
        //查询商品信息
        Item item = itemService.getItemById(new Integer(idStr));
        model.addAttribute("item", item);
        return "itemEdit";
    }*/

    @RequestMapping("itemEdit")
    /**
     * 简单参数的传递
     * @RequestParam(value="id",required=true)  Integer ids 必须传入id,赋给ids
     * @param model
     * @param id
     * @return
     */
    public String itemEdit(Model model ,@RequestParam(value="id",required=true)  Integer ids){
        //查询商品信息
        Item item = itemService.getItemById(ids);
        model.addAttribute("item", item);
        return "itemEdit";
    }

    @RequestMapping("updateItem")
    /**
     * 修改商品，显示pojo参数绑定
     * @param item
     * @return
     */
    public String updateItem(Item item , Model model){
        itemService.updateItem(item);
        model.addAttribute("msg", "背包修改成功");
        return "itemEdit";
    }

    @RequestMapping("queryItem")
    /**
     * 包装类的使用
     * @param vo
     * @param model
     * @return
     */
    public String queryItem(QueryVo vo , Model model){
        if(vo.getItem()!=null){
            System.out.println(vo.getItem());
        }
        //模拟搜索商品
        List<Item> itemList = itemService.getItemList();
        model.addAttribute("itemList",itemList);
        return "itemList";
    }

}

web.xml：

配置Spring，使用监听器加载Spring配置文件

使用Spring提供的过滤器解决post乱码问题

配置核心控制器DispatcherServlet,是SpringMVC的入口

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>SpringMvc01</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>

  <!-- 配置spring -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring/applicationContext*.xml</param-value>
    </context-param>

    <!-- 使用监听器加载Spring配置文件 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <!-- 解决post乱码问题 -->
    <filter>
        <filter-name>encoding</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <!-- 设置编码参是UTF8 -->
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>encoding</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

  <!-- 配置核心控制器，SpringMVC入口是Servlet -->
  <servlet>
     <servlet-name>springmvc</servlet-name>
     <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

     <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring/springmvc.xml</param-value>
     </init-param>
  </servlet>
  <servlet-mapping>
     <servlet-name>springmvc</servlet-name>
     <url-pattern>*.action</url-pattern>
  </servlet-mapping>

</web-app>