一、前言
本文主要讲解springMVC+mybatis整合，关于mybatis教程，请参考https://www.vxzsk.com/53/cate.html 。然后我们回顾一下上一章节讲解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 springMVC+mybatis整合流程如下：
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 基于maven项目
2.1 Jar包导入
<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/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
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>db.properties配置文件
driverClassName=oracle.jdbc.driver.OracleDriver url=jdbc:oracle:thin:@127.0.0.0:1521/orcl username=root password=root
2、依照订单为例子建立mapper与sqlconfig
sqlMapConfig.xml如下：
<!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：
<?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
package com.ycy.mapper;
import com.ycy.dto.parameter.ItemsCustom;
import com.ycy.dto.result.ItemsCustomResult;
import java.util.List;
/**
*
*/
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
<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-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 "> <!-- 扫描service 包配置 --> <context:component-scan base-package="com.ycy.service"/> </beans>
2、service的java文件
ItemsService：如下
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：
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>
2、SpringMVC.xml文件编写
<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-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 "> <!--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：
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.
*/
@Controller
public 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、建议初学者最好按照上述步骤一步一步来，虽然花费时间，但是对理解springMVC+mybatis整合理解更加深刻。
-----------本文改编自ycy博文
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