14、mybatis与spring、springmvc集成

在这一系列文章中，前面讲到纯粹用mybatis 连接数据库，然后 进行增删改查，以及多表联合查询的的例子，但实际项目中，通常会用 spring 这个沾合剂来管理 datasource 等。充分利用spring 基于接口的编程，以及aop ,ioc 带来的方便。用spring 来管理 mybatis 与管理hibernate 有很多类似的地方。今天的重点就是数据源管理以及 bean的配置。
1、先加载一些spring相关的jar文件（附件springBlank），在执行过程中报classnotfound时，再网上下载

2、首先对前面的工程结构做一点改变，在src_user源代码目录下建立文件夹config ,并将原来的 mybatis 配置文件 Configuration.xml 移动到这个文件夹中, 并在config 文家夹中建立 spring 配置文件：applicationContext.xml ，这个配置文件里最主要的配置：

applicationContext.xml ：

<?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"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd" xmlns:tx="http://www.springframework.org/schema/tx">
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://127.0.0.1:3306/abcc?characterEncoding=utf8"/>
<property name="username" value="root"></property>
<property name="password" value="111122"></property>
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="configLocation" value="config/Configuration.xml"/>
</bean>
<bean id="userMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">
<property name="sqlSessionFactory" ref="sqlSessionFactory" />
<property name="mapperInterface" value="com.yihaomen.mybatis.inter.IUserOperation" />
</bean>
</beans>

 这里面的重点就是 org.mybatis.spring.SqlSessionFactoryBean 与 org.mybatis.spring.mapper.MapperFactoryBean 实现了 spring  的接口，并产生对象。
没有对Configuration.xml修改；
 
创建测试类MybatisSprintTest ：

package com.yihaomen.test;
import java.util.List;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.yihaomen.mybatis.inter.IUserOperation;
import com.yihaomen.mybatis.model.Article;
import com.yihaomen.mybatis.model.User;
public class MybatisSprintTest {
private static ApplicationContext ctx;  
static
{  
ctx = new ClassPathXmlApplicationContext("config/applicationContext.xml");
}        
public static void main(String[] args)  
{  
IUserOperation mapper = (IUserOperation)ctx.getBean("userMapper");   //查找id="userMapper"的类
User user = mapper.selectUserByID(1);  //调用User.xml文件配置id="selectUserByID"的方法
System.out.println(user.getUserAddress());
List<Article> articles = mapper.getUserArticles(1); //调用User.xml文件配置id="getUserArticles"的方法
for(Article article:articles){
System.out.println(article.getContent()+"--"+article.getTitle());
}
}  
}
 报错：Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory
下载：http://mvnrepository.com/     commons-logging-1.1.1.jar
报错:java.lang.ClassNotFoundException: org.apache.commons.dbcp.BasicDataSource
下载：commons-dbcp-1.4.jar
报错：java.lang.ClassNotFoundException: org.apache.commons.pool.ObjectPool
下载：commons-pool-1.6.jar
报错：java.lang.ClassNotFoundException: org.mybatis.spring.SqlSessionFactoryBean
下载：mybatis-spring-1.1.1.jar
报错：java.lang.ClassNotFoundException: org.springframework.dao.support.DaoSupport
下载：spring-tx-4.0.6.RELEASE.jar
好，现在没有报错了；输出结果。
表明spring的集成成功，接管了mybatis的配置文件
 
 
若对springMVC还不是很懂的朋友，请先看后面的一章springMVC+spring+hibernate;下面开始整合springmvc+spring+mybatis
1、添加jar文件这里就不再一个一个的下载了，有兴趣的朋友可以自己比较下：项目springmvcMb附录下载

2.web.xml
出现：The content of element type "web-app" must match "时表明4个标签顺序不对，<context> <filter> <listener> <servlet> 
 

<?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"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" 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>springmvcMb</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<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>

<servlet>  
<servlet-name>dispatcherServlet</servlet-name>  
<servlet-class>  
org.springframework.web.servlet.DispatcherServlet  
</servlet-class>  
<init-param>  
<param-name>contextConfigLocation</param-name>  
<param-value>classpath*:config/web-servlet.xml,classpath*:config/dao-servlet.xml</param-value>  
</init-param>  
<load-on-startup>1</load-on-startup>  
</servlet>  
<servlet-mapping>  
<servlet-name>dispatcherServlet</servlet-name>  
<url-pattern>/</url-pattern>  
</servlet-mapping>  
</web-app>
 2.1、web-servlet.xml

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc" 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-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
<context:component-scan base-package="com.yihaomen.controller" />
<mvc:annotation-driven />
<mvc:resources mapping="/static/**" location="/WEB-INF/static/"/>  
<mvc:default-servlet-handler/>  
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix">
<value>/WEB-INF/pages/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
</beans>

 2.2、dao-servlet.xml

<?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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="  
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd  
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd  
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd  
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.0.xsd  
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd"  
default-autowire="byName" default-lazy-init="false">
<!--本示例采用DBCP连接池，应预先把DBCP的jar包复制到工程的lib目录下。 -->   
<context:property-placeholderlocation="classpath:/config/database.properties" />
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close" p:driverClassName="com.mysql.jdbc.Driver"
p:url="jdbc:mysql://127.0.0.1:3306/abcc?characterEncoding=utf8"
p:username="root" p:password="111122"
p:maxActive="10" p:maxIdle="10">
</bean>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!--dataSource属性指定要用到的连接池-->
<property name="dataSource" ref="dataSource"/>
<!--configLocation属性指定mybatis的核心配置文件-->
<property name="configLocation" value="classpath:config/Configuration.xml" />
<!-- 所有配置的mapper文件 -->
<property name="mapperLocations" value="classpath*:com/yihaomen/mapper/*.xml" />
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.yihaomen.inter" />
</bean>
<!--
<bean id="userMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">     
<property name="sqlSessionFactory" ref="sqlSessionFactory" />     
<property name="mapperInterface" value="com.yihaomen.inter.IUserOperation" />
</bean>
-->
</beans>
 2.2.1  Configuration.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>
<typeAliases>
<typeAlias alias="User" type="com.yihaomen.model.User"/>
<typeAlias alias="Article" type="com.yihaomen.model.Article"/>  
</typeAliases>
<!-- 与spring 集成之后,这些可以完全删除,数据库连接的管理交给 spring 去管理 -->
<!--
<environments default="development">
<environment id="development">
<transactionManager type="JDBC"/>
<dataSource type="POOLED">
<property name="driver" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://127.0.0.1:3306/mybatis?characterEncoding=utf8" />
<property name="username" value="root"/>
<property name="password" value="password"/>
</dataSource>
</environment>
</environments>
-->
<!-- 这里交给sqlSessionFactory 的 mapperLocations属性去得到所有配置信息 -->
<!--
<mappers>
<mapper resource="com/yihaomen/mapper/User.xml"/>
</mappers>
-->
</configuration>
　　2.2.2 src/com/yihaomen/mapper/User.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.yihaomen.inter.IUserOperation">
<select id="selectUserByID" parameterType="int" resultType="User">
select * from `user` where id = #{id}
</select>
<!-- 为了返回list 类型而定义的returnMap -->
<resultMap type="User" id="resultListUser">
<id column="id" property="id" />
<result column="userName" property="userName" />
<result column="userAge" property="userAge" />
<result column="userAddress" property="userAddress" />
</resultMap>
<!-- 返回list 的select 语句，注意 resultMap 的值是指向前面定义好的 -->
<select id="selectUsers" parameterType="string" resultMap="resultListUser">
select * from user where userName like #{userName}
</select>
<resultMap id="resultUserArticleList" type="Article">
<id property="id" column="aid" />
<result property="title" column="title" />
<result property="content" column="content" />   
<association property="user" javaType="User" resultMap="resultListUser" />         
</resultMap>
<select id="getUserArticles" parameterType="int" resultMap="resultUserArticleList">
select user.id,user.userName,user.userAddress,article.id aid,article.title,article.content from user,article
where user.id=article.userid and user.id=#{id}
</select>
<insert id="addUser" parameterType="User"
useGeneratedKeys="true" keyProperty="id">
insert into user(userName,userAge,userAddress)  
values(#{userName},#{userAge},#{userAddress})  
</insert>
<update id="updateUser" parameterType="User" >
update user set userName=#{userName},userAge=#{userAge},userAddress=#{userAddress} where id=#{id}
</update>
<delete id="deleteUser" parameterType="int">
delete from user where id=#{id}
</delete>
</mapper>
　　2.2.3 src/config/database.properties

jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/abcc?characterEncoding=utf8
jdbc.username=root
jdbc.password=111122
3、model类，操作接口、前端显示;

package com.yihaomen.model;
public class User {
private int id;
private String userName;
private String userAge;
private String userAddress;

package com.yihaomen.model;
public class Article {
private int id;
private User user;
private String title;
private String content;
package com.yihaomen.inter;
import java.util.List;
public interface IUserOperation {   
public User selectUserByID(int id);
public List<User> selectUsers(String userName);
public void addUser(User user);
public void updateUser(User user);
public void deleteUser(int id);
public List<Article> getUserArticles(int id);
package com.yihaomen.controller;
@Controller
public class UserController {
@Autowired
IUserOperation userMapper;
@RequestMapping("/list")
public ModelAndView listall(HttpServletRequest request,HttpServletResponse response){
List<Article> articles=userMapper.getUserArticles(1);
return new ModelAndView("/list","articles",articles);

　　测试：http://localhost:9080/springmvcMb/list
　　集成完成！
　　开发过程中可能遇到的问题：
 *@RequestMapping
下载：spring-web-4.1.0.RELEASE.jar
*ModelAndView
下载：spring-webmvc-4.1.0.RELEASE.jar
*HttpServletRequest    表示缺少servlet-api.jar的包
添加tomcat库：右键属性--  java build  path--add libaray 
添加：jstl标签库  
下载;jstl-1.2.jar
在需要用到jstl表达式的jsp上加上：<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%> 
 
mybatis设置分页显示：
mybatis动态sql语句查询 将在后面的高级运用中讲解
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