springMVC学习(3)-springMVC和mybatis整合

一、需求：
使用springmvc和mybatis完成商品列表查询。

二、整合思路：
springMVC+mybaits的系统架构：

1步）：整合dao层

mybatis和spring整合，通过spring管理mapper接口。使用mapper的扫描器自动扫描mapper接口在spring中进行注册。

2步）：整合service层

通过spring管理 service接口。使用配置方式将service接口配置在spring配置文件中。实现事务控制。

3步）整合springmvc　由于springmvc是spring的模块，不需要整合。

所需要的jar包：

数据库驱动包：mysql5.1、mybatis的jar包、mybatis和spring整合包、log4j包、dbcp数据库连接池包、spring3.2所有jar包、jstl包

三、开始整合和开发：

1）工程结构：

2）整合dao：

配置sqlMapConfig.xml;

配置applicationContext-dao.xml:（数据源、sqlSessionFactory、mapper扫描器）

逆向工程生成mapper接口、mapper.xml、po类；将生成的文件拷贝至工程中；

编写扩展po类poCustom、以及对应的poCustom.xml和接口poCustom.java；

3）整合Serive：

配置applicationContext-service.xml(配置Service.bean、配置事务)

4）整合springMVC：

配置springMVC.xml(配置处理器映射器、适配器、视图解析器；相关扫描包)

配置web.xml(配置前端控制器、监听器加载spring配置文件(使用通配符))

相关代码：

items.java:

 package com.cy.po;

 import java.util.Date;

 public class Items {
     private Integer id;
     private String name;
     private Float price;
     private String pic;
     private Date createtime;
     private String detail;
     ...

     getters and setters
 }

Items.java

ItemsCustom.java:

package com.cy.po;

/**
 * 商品信息的扩展类
 * @author chengyu
 *
 */
public class ItemsCustom extends Items{
    //添加商品信息的扩展属性
}

ItemsQueryVo.java:

 package com.cy.po;

 /**
  * 商品包装对象
  * @author chengyu
  *
  */
 public class ItemsQueryVo {
     //商品信息
     private Items items;
     //为了系统 可扩展性，对原始生成的po进行扩展
     private ItemsCustom itemsCustom;

     public Items getItems() {
         return items;
     }
     public void setItems(Items items) {
         this.items = items;
     }
     public ItemsCustom getItemsCustom() {
         return itemsCustom;
     }
     public void setItemsCustom(ItemsCustom itemsCustom) {
         this.itemsCustom = itemsCustom;
     }

 }

ItemsMapperCustom.java:

 package com.cy.mapper;

 import java.util.List;

 import com.cy.po.ItemsCustom;
 import com.cy.po.ItemsQueryVo;

 public interface ItemsMapperCustom {
     //商品查询列表
     public List<ItemsCustom> findItemsList(ItemsQueryVo itemsQueryVo) throws Exception;
 }

ItemsMapperCustom.xml:

 <?xml version="1.0" encoding="UTF-8" ?>
 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
 <mapper namespace="com.cy.mapper.ItemsMapperCustom" >

     <sql id="query_items_where">
         <!-- 商品查询条件通过ItemsQueryVo包装对象 中itemsCustom属性传递 -->
         <if test="itemsCustom!=null">
             <if test="itemsCustom.name!=null and itemsCustom.name!=''">
                 and itemsCustom.name like '%${itemsCustom.name}%'
             </if>
         </if>
     </sql>

     <!-- 商品列表查询 -->
     <!-- parameterType传入包装对象(包装了查询条件)
           resultType建议使用扩展对象
        -->
     <select    id="findItemsList" parameterType="com.cy.po.ItemsQueryVo" resultType="com.cy.po.ItemsCustom">
         select * from items
         <where>
             <include refid="query_items_where"></include>
         </where>
     </select>
 </mapper>

ItemsService接口：

 package com.cy.service;

 import java.util.List;

 import com.cy.po.ItemsCustom;
 import com.cy.po.ItemsQueryVo;

 /**
  * 商品管理service
  * @author chengyu
  *
  */
 public interface ItemsService {

     public List<ItemsCustom> findItemsList(ItemsQueryVo itemsQueryVo) throws Exception;
 }

ItemsServiceImpl实现类：

 package com.cy.service.impl;

 import java.util.List;

 import org.springframework.beans.factory.annotation.Autowired;

 import com.cy.mapper.ItemsMapperCustom;
 import com.cy.po.ItemsCustom;
 import com.cy.po.ItemsQueryVo;
 import com.cy.service.ItemsService;

 /**
  * ItemsServiceImpl
  *
  */
 public class ItemsServiceImpl implements ItemsService {

     @Autowired
     private ItemsMapperCustom    itemsMapperCustom;

     @Override
     public List<ItemsCustom> findItemsList(ItemsQueryVo itemsQueryVo) throws Exception {
         //通过ItemsMapperCustom查询数据库
         return itemsMapperCustom.findItemsList(itemsQueryVo);
     }

 }

ItemsController:

 package com.cy.controller;

 import java.util.List;

 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.servlet.ModelAndView;

 import com.cy.po.ItemsCustom;
 import com.cy.service.ItemsService;

 @Controller
 public class ItemsController {

     @Autowired
     private ItemsService itemsService;

     @RequestMapping("/findItems")
     public ModelAndView findItems() throws Exception {

         List<ItemsCustom> itemsList = itemsService.findItemsList(null);

         ModelAndView modelAndView =  new ModelAndView();
         modelAndView.addObject("itemsList", itemsList);
         modelAndView.setViewName("itemsList");
         return modelAndView;
     }
 }

mybatis/sqlMapConfig.xml:

 <?xml version="1.0" encoding="UTF-8" ?>
 <!DOCTYPE configuration
 PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
 "http://mybatis.org/dtd/mybatis-3-config.dtd">
 <configuration>

     <!-- 全局setting配置，根据需要添加 -->

     <typeAliases>
         <package name="com.cy.po"/>
     </typeAliases>

     <!-- 配置mapper
     由于使用spring和mybatis的整合包进行mapper扫描，这里不需要配置了。
     必须遵循：mapper.xml和mapper.java文件同名且在一个目录
      -->
     <!-- <mappers></mappers> -->
 </configuration>

applicationContext-dao.xml:

 <beans xmlns="http://www.springframework.org/schema/beans"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
     xmlns:context="http://www.springframework.org/schema/context"
     xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
     xsi:schemaLocation="http://www.springframework.org/schema/beans
         http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
         http://www.springframework.org/schema/mvc
         http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
         http://www.springframework.org/schema/context
         http://www.springframework.org/schema/context/spring-context-3.2.xsd
         http://www.springframework.org/schema/aop
         http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
         http://www.springframework.org/schema/tx
         http://www.springframework.org/schema/tx/spring-tx-3.2.xsd ">

     <!-- 加载db.properties -->
     <context:property-placeholder location="classpath:db.properties" />

     <!-- 配置数据源 ，dbcp -->
     <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
         <property name="driverClassName" value="${jdbc.driver}" />
         <property name="url" value="${jdbc.url}" />
         <property name="username" value="${jdbc.username}" />
         <property name="password" value="${jdbc.password}" />
         <property name="maxActive" value="30" />
         <property name="maxIdle" value="5" />
     </bean>

     <!-- 配置sqlSessionFactory -->
     <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
         <property name="dataSource" ref="dataSource" />
         <!-- 加载mybatis的全局配置文件 -->
         <property name="configLocation" value="classpath:mybatis/sqlMapConfig.xml" />
     </bean>

     <!-- 配置Mapper扫描器 -->
     <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
         <property name="basePackage" value="com.cy.mapper"></property>
         <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
     </bean>
 </beans>

applicationContext-serivice.xml:

 <!-- 商品管理的service -->
     <bean id="itemsService" class="com.cy.service.impl.ItemsServiceImpl" />

applicationContext-transaction.xml:

 <beans xmlns="http://www.springframework.org/schema/beans"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
     xmlns:context="http://www.springframework.org/schema/context"
     xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
     xsi:schemaLocation="http://www.springframework.org/schema/beans
         http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
         http://www.springframework.org/schema/mvc
         http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
         http://www.springframework.org/schema/context
         http://www.springframework.org/schema/context/spring-context-3.2.xsd
         http://www.springframework.org/schema/aop
         http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
         http://www.springframework.org/schema/tx
         http://www.springframework.org/schema/tx/spring-tx-3.2.xsd ">

     <!-- 事务管理器 对mybatis操作数据库事务控制，spring使用jdbc的事务控制类-->
     <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
         <!-- 数据源 dataSource在applicationContext-dao.xml中配置了 -->
         <property name="dataSource" ref="dataSource"></property>
     </bean>

     <!-- 通知 -->
     <tx:advice id="txAdvice" transaction-manager="transactionManager">
         <tx:attributes>
             <!-- 传播行为 -->
             <tx:method name="save*" propagation="REQUIRED"/>
             <tx:method name="delete*" propagation="REQUIRED"/>
             <tx:method name="insert*" 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="select*" propagation="SUPPORTS" read-only="true"/>
         </tx:attributes>
     </tx:advice>

     <!-- aop -->
     <aop:config>
         <!-- 切点 在com.cy.service.impl包下的所有类的所有方法(不论参数) -->
         <aop:advisor advice-ref="txAdvice" pointcut="execution(* com.cy.service.impl.*.*(..))"/>
     </aop:config>
 </beans>

springmvc.xml:

 <beans xmlns="http://www.springframework.org/schema/beans"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
     xmlns:context="http://www.springframework.org/schema/context"
     xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
     xsi:schemaLocation="http://www.springframework.org/schema/beans
         http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
         http://www.springframework.org/schema/mvc
         http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
         http://www.springframework.org/schema/context
         http://www.springframework.org/schema/context/spring-context-3.2.xsd
         http://www.springframework.org/schema/aop
         http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
         http://www.springframework.org/schema/tx
         http://www.springframework.org/schema/tx/spring-tx-3.2.xsd ">

     <!-- 对于注解的Handler可以单个配置 实际开发中建议使用组件扫描 -->
     <context:component-scan base-package="com.cy.controller" />

     <!-- mvc:annotation-driven默认加载很多的参数绑定方法，比如json转换解析器就默认加载了，实际开发时使用mvc:annotation-driven-->
     <mvc:annotation-driven></mvc:annotation-driven>

     <!-- 视图解析器 解析jsp视图，默认使用jstl标签，classpath下的得有jstl的包 -->
     <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
         <property name="prefix" value="/WEB-INF/jsp/"/>
         <property name="suffix" value=".jsp"/>
     </bean>
 </beans>

web.xml:

 <?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>springMVC</display-name>

       <!-- 加载spring容器 -->
     <context-param>
         <param-name>contextConfigLocation</param-name>
         <param-value>/WEB-INF/classes/spring/applicationContext-*.xml</param-value>
     </context-param>
     <listener>
         <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
     </listener>    

   <!-- springmvc前端控制器 -->
   <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>

   <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>
 </web-app>

jsp页面和db.properties和log4j.properties和之前的配置一样；

测试：

浏览器访问http://localhost:8080/springMVC/findItems.action