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
}

 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