springMVC教程初级(三)springmvc+Mybatis整合（重点 ）

一、前言

1.1回顾SpringMVC

上一章讲解SpringMVC的一些详细分析，主要讲解了

非注解两种映射器：BeanNameUrlHandlerMapping、SimpleUrlHandlerMapping;两种适配HttpRequestHandlerAdapter、SimpleControllerHandlerAdapter

注解的映射器：RequestMappingInfoHandlerMapping注解的适配器:AnnotationMethodHandlerAdapter，

视图解析器：ViewResolver

以及如何通过DispatcherServlet来一步步实现了MVC，返回页面组装数据的

1.2计划SpringMVC+Mybatis

之前讲过Mybatis与Spring整合（Mybatis的章节），这里我们讲一下SpringMVC与Mybatis整合

第一步：整合Dao，spring与mybatis整合

第二步：整合Service，Service可以调用Mapper

第三步：整合Controller，Controller可以调用Service

二、SpringMVC整合Mybatis

2.1 Jar包导入

<pre name="code" class="html"><project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">  <modelVersion>4.0.0</modelVersion>  <groupId>com.ycy.spring01</groupId>  <artifactId>spring01</artifactId>  <packaging>war</packaging>  <version>1.0-spring01</version>  <name>spring Maven Webapp</name>  <url>http://maven.apache.org</url>  <dependencies>    <dependency>      <groupId>junit</groupId>      <artifactId>junit</artifactId>      <version>4.11</version>      <scope>test</scope>    </dependency>    <!--数据库驱动-->    <dependency>      <groupId>mysql</groupId>      <artifactId>mysql-connector-java</artifactId>      <version>5.1.30</version>    </dependency>    <!--数据库链接-->    <dependency>      <groupId>commons-dbcp</groupId>      <artifactId>commons-dbcp</artifactId>      <version>1.2.2</version>    </dependency>    <!--springMvc-->    <dependency>      <groupId>org.springframework</groupId>      <artifactId>spring-webmvc</artifactId>      <version>4.2.0.RELEASE</version>    </dependency>    <dependency>      <groupId>org.springframework</groupId>      <artifactId>spring-jdbc</artifactId>      <version>4.2.0.RELEASE</version>    </dependency>    <dependency>      <groupId>org.aspectj</groupId>      <artifactId>aspectjweaver</artifactId>      <version>1.8.7</version>    </dependency>    <!--log4j官方推荐jar-->    <dependency>      <groupId>org.apache.logging.log4j</groupId>      <artifactId>log4j-api</artifactId>      <version>2.3</version>    </dependency>    <dependency>      <groupId>org.apache.logging.log4j</groupId>      <artifactId>log4j-core</artifactId>      <version>2.3</version>    </dependency>    <!--log4j实现slf4j：因为Mybatis是用的slf4j-->    <dependency>      <groupId>org.apache.logging.log4j</groupId>      <artifactId>log4j-slf4j-impl</artifactId>      <version>2.3</version>    </dependency>    <!--spring+Mybatis-->    <dependency>      <groupId>org.mybatis</groupId>      <artifactId>mybatis-spring</artifactId>      <version>1.2.3</version>    </dependency>    <dependency>      <groupId>org.mybatis</groupId>      <artifactId>mybatis</artifactId>      <version>3.3.0</version>    </dependency>    <!--servlet包-->    <dependency>      <groupId>javax.servlet</groupId>      <artifactId>servlet-api</artifactId>      <version>2.5</version>      <scope>provided</scope>    </dependency>    <dependency>      <groupId>javax.servlet.jsp</groupId>      <artifactId>jsp-api</artifactId>      <version>2.1</version>      <scope>provided</scope>    </dependency>    <!--标签库-->    <dependency>      <groupId>jstl</groupId>      <artifactId>jstl</artifactId>      <version>1.2</version>    </dependency>    <dependency>      <groupId>taglibs</groupId>      <artifactId>standard</artifactId>      <version>1.1.2</version>      <scope>provided</scope>    </dependency>  </dependencies>  <build>    <finalName>spring01</finalName>  </build></project>

2.2 配置整合开启

按照SpringMVC的制度一步步来

2.2.1 配置Dao1：applicationContext-dao.xml ---数据源、SqlsessionFactory、Mapper扫描

2.2.2 配置Dao2：SqlMapConfig.xml---mybatis的配置文件，配置别名、settings、mapper

2.2.3  配置Service1：applicationContext-service.xml---配置service接口

2.2.4  配置Service2：applicationContext-transaction.xml--事务管理

2.2.5  配置Controller与MVC：sprintmvc.xml---springmvc的配置，配置处理器映射器、适配器、视图解析器

记住口诀：2Dao+2Service+1MVC=springMVC+mybatis

2.2.1配置Dao

1、我们将spring-dao与事务一起配置：构成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/beanshttp://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 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 ">    <!-- ========================================配置数据源========================================= -->    <!-- 加载配置文件 -->    <context:property-placeholder location="classpath:/config/db.properties"/>    <!-- 数据库连接池 -->    <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="10"/>        <property name="maxIdle" value="5"/>    </bean>    <!-- ========================================针对myBatis的配置项============================== -->    <!-- SqlsessionFactory -->    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">        <!-- 数据源 -->        <property name="dataSource" ref="dataSource"/>        <!-- mybatis配置文件 -->        <property name="configLocation" value="classpath:mybatis/sqlMapConfig.xml"/>    </bean>    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">        <!-- 配置扫描包的路径 如果要扫描多个包，中间使用半角逗号分隔 -->        <property name="basePackage" value="com.ycy.mapper"/>        <!-- 使用sqlSessionFactoryBeanName -->        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>    </bean>    <!-- ========================================事物配置========================================= -->    <!-- 事务管理器 -->    <bean id="transactionManager"          class="org.springframework.jdbc.datasource.DataSourceTransactionManager">        <property name="dataSource" ref="dataSource"/>    </bean>    <!-- 通知 -->    <tx:advice id="txAdvice" transaction-manager="transactionManager">        <tx:attributes>            <tx:method name="save*" propagation="REQUIRED"/>            <tx:method name="insert*" propagation="REQUIRED"/>            <tx:method name="update*" propagation="REQUIRED"/>            <tx:method name="delete*" propagation="REQUIRED"/>            <tx:method name="find*" propagation="SUPPORTS" read-only="true"/>            <tx:method name="select*" propagation="SUPPORTS" read-only="true"/>            <tx:method name="get*" propagation="SUPPORTS" read-only="true"/>        </tx:attributes>    </tx:advice>    <!-- aop -->    <aop:config>        <aop:advisor advice-ref="txAdvice"                     pointcut="execution(* com.ycy.service.impl.*.*(..))"/>    </aop:config></beans>

2、依照订单为例子建立mapper与sqlconfig

sqlMapConfig.xml如下：

<pre name="code" class="html"><!DOCTYPE configuration        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"        "http://mybatis.org/dtd/mybatis-3-config.dtd"><configuration>    <!-- =================================全局配置参数=============================== -->    <settings>        <!-- 延迟加载总开关 -->        <setting name="lazyLoadingEnabled" value="true" />        <!-- 设置按需加载 -->        <setting name="aggressiveLazyLoading" value="false" />        <!-- 二级缓存总开关 -->        <setting name="cacheEnabled" value="true"/>    </settings>    <!--===============================加载mapper====================================-->    <mappers>        <!--1:通过resource路径导入xml映射（idea必须在resource文件下面）-->        <mapper  resource="mapper/ItemsMapper.xml"/>        <!--3:通过批量导入package，自动扫描包下面mapper接口 注意：此时class文件必须与想xml文件在一个目录下,同名-->        <!--<package name="com.ycy.mybatis.dao"/>-->    </mappers></configuration>

ItemsMapper.xml如下：

<pre name="code" class="html"><?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.ycy.mapper.ItemsMapper"><select id="getItemsById" parameterType="com.ycy.dto.parameter.ItemsCustom"            resultType="com.ycy.dto.result.ItemsCustomResult">  SELECT  * from items WHERE  id=#{id}</select>    <select id="findtemsList" parameterType="com.ycy.dto.parameter.ItemsCustom"            resultType="com.ycy.dto.result.ItemsCustomResult">    SELECT  * from items  </select></mapper>

3、配置mapper.java

<pre name="code" class="html">package com.ycy.mapper;import com.ycy.dto.parameter.ItemsCustom;import com.ycy.dto.result.ItemsCustomResult;import java.util.List;/** * Created by Administrator on 2015/9/22 0022. */public interface ItemsMapper {    public ItemsCustomResult getItemsById(ItemsCustom itemsCustom);    public List<ItemsCustomResult> findtemsList(ItemsCustom itemsCustom);}

2.2.1配置Service

1、applicationContext-service.xml配置文件

<pre name="code" class="html"><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/beanshttp://www.springframework.org/schema/beans/spring-beans-4.0.xsdhttp://www.springframework.org/schema/mvchttp://www.springframework.org/schema/mvc/spring-mvc-4.0.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-4.0.xsdhttp://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop-4.0.xsdhttp://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx-4.0.xsd ">    <!-- 扫描service 包配置 --><context:component-scan base-package="com.ycy.service"/></beans>

2、service的java文件

ItemsService：如下

<pre name="code" class="html">package com.ycy.service;import com.ycy.dto.parameter.ItemsCustom;import com.ycy.dto.result.ItemsCustomResult;import java.util.List;/** * Created by Administrator on 2015/9/22 0022. */public interface ItemsService {    public ItemsCustomResult getItemsById(Integer id, ItemsCustom itemsCustom) throws Exception;    public List<ItemsCustomResult> findtemsList(ItemsCustom itemsCustom)throws Exception;;}

ItemsServiceImpl如下：

<pre name="code" class="html">package com.ycy.service.impl;import com.ycy.dto.parameter.ItemsCustom;import com.ycy.dto.result.ItemsCustomResult;import com.ycy.mapper.ItemsMapper;import com.ycy.service.ItemsService;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import java.util.List;/** * Created by Administrator on 2015/9/22 0022. */public class ItemsServiceImpl implements ItemsService {    @Autowired    private ItemsMapper itemsMapper;    public ItemsCustomResult getItemsById(Integer id,ItemsCustom itemsCustom) throws  Exception{        if(id!=null){            return itemsMapper.getItemsById(itemsCustom);        }else{            throw new Exception("query id is null");        }    }    public List<ItemsCustomResult> findtemsList(ItemsCustom itemsCustom) throws Exception {        return itemsMapper.findtemsList(itemsCustom);    }}

2.2.3配置Controller

1、首先我们需要把service、dao加入web环境，再加上之前配置的Dispatcher，web.xml是如下：

<?xml version="1.0" encoding="UTF-8"?><web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee"         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"         metadata-complete="false">    <!-- 配置spring容器监听器 -->    <context-param>        <param-name>contextConfigLocation</param-name>        <param-value>classpath:spring/applicationContext-*.xml</param-value>    </context-param>    <listener>        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>    </listener>    <!-- 设置servlet编码开始 -->    <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>        <init-param>            <param-name>forceEncoding</param-name>            <param-value>true</param-value>        </init-param>    </filter>    <filter-mapping>        <filter-name>CharacterEncodingFilter</filter-name>        <url-pattern>/</url-pattern>    </filter-mapping>    <!-- 设置servlet编码结束 -->    <display-name>Archetype Created Web Application</display-name>    <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>        <load-on-startup>1</load-on-startup>    </servlet>    <servlet-mapping>        <servlet-name>springMVC</servlet-name>        <url-pattern>/</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><span style="color:#000099;"></span>

2、SpringMVC文件编写

<pre name="code" class="html"><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/beanshttp://www.springframework.org/schema/beans/spring-beans-4.0.xsdhttp://www.springframework.org/schema/mvchttp://www.springframework.org/schema/mvc/spring-mvc-4.0.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-4.0.xsdhttp://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop-4.0.xsdhttp://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx-4.0.xsd ">    <!--1、=========================dispatcher已经在web.xml里面配置=============================-->    <!-- 使用spring组件扫描 -->    <context:component-scan base-package="com.ycy.controller"/>    <!-- 2、3 通过annotation-driven可以替代下边的处理器映射器和适配器 -->    <!-- <mvc:annotation-driven conversion-service="conversionService"></mvc:annotation-driven>-->    <!--2、=======================使用注解RequestMappingInfoHandlerMapping映射器==================== -->    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"/>    <!--3、=============================处理器适配器HandlerAdapter================================-->    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"/>    <!--4、============================视图解析器ViewResolver======================================-->    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>        <property name="prefix" value="/pages/jsp/"/>        <property name="suffix" value=".jsp"/>    </bean>    <!--5、视图view与hanlder需要自己实现--></beans>

3、编写Controller的java文件

ItemController如下：

<pre name="code" class="html">package com.ycy.controller;import com.ycy.dto.parameter.ItemsCustom;import com.ycy.dto.result.ItemsCustomResult;import com.ycy.model.Items;import com.ycy.service.ItemsService;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 java.util.ArrayList;import java.util.Date;import java.util.List;/** * Created by Administrator on 2015/9/17 0017. */@Controllerpublic class ItemController {    @Autowired    private ItemsService itemsService;    @RequestMapping("/queryItems")    public ModelAndView queryItems(javax.servlet.http.HttpServletRequest httpServletRequest,                                      javax.servlet.http.HttpServletResponse httpServletResponse) throws Exception {        ItemsCustom itemsCustom=new ItemsCustom();        itemsCustom.setId(1);        //商品列表        List<ItemsCustomResult> itemsList = itemsService.findtemsList(null);        //创建modelAndView准备填充数据、设置视图        ModelAndView modelAndView = new ModelAndView();        //填充数据        modelAndView.addObject("itemsList", itemsList);        //视图        modelAndView.setViewName("order/itemsList");        return modelAndView;    }}

2.2.3 编写页面

itemsList.jsp如下：

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" isELIgnored="false" %><%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"  %><%@ taglib uri="http://java.sun.com/jsp/jstl/fmt"  prefix="fmt" %><!DOCTYPE HTML><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>查询商品列表</title></head><body> <form action="${pageContext.request.contextPath }/items/queryItem.action" method="post">查询条件：<table width="100%" border=1><tr><td><input type="submit" value="查询"/></td></tr></table>商品列表：33<table width="100%" border=1><tr><td>商品名称</td><td>商品价格</td><td>生产日期</td><td>商品描述</td><td>操作</td></tr><c:forEach items="${itemsList}" var="item"><tr><td>${item.name}</td><td>${item.price}</td><td><fmt:formatDate value="${item.createtime}" pattern="yyyy-MM-dd HH:mm:ss"/></td><td>${item.detail}</td><td><a href="${pageContext.request.contextPath }/items/editItems.action?id=${item.id}">修改</a></td></tr></c:forEach></table></form></body></html>

2.2.4 配置完成结构如下：

三、总结

1、整合Jar：log4j的包导入，log4j实现slf4j：因为Mybatis是用的slf4j

          aspectjweaver包的导入，它的作用起到事务管理作用，相信在不久的将来会融合到springMVC中，至少目前我们用这种方法除开springMvc包还需          要两个包才能构成MVC完整，那就是spring.jdbc 与aspectjweaver，一般用他们管理事务。

2、整合顺序：对于很多新手，最好还是按照我的dao-service-Controller来整合，一步步来。整合完，再根据我提供的demo一步步检查对比。

3、忠告：项目中用到的sql、数据库 与po等完全不用放心上，因为你如果需要参照项目做，可以去git上下载下来我spring01项目，下载下来就是一个maven项目。之所以一步步将整合，不想其他的直接每个贴出来，就是想让学习的人一步步了解。一步步学习懂得，而不是复读机，没得意思····