MyBatis和Spring整合
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Spring MyBatis整合包
Spring 解压
然后导入Mybatis包。
最后状态:
上面导入了SSM的相关jar包
另外需要整合包:
配置文件:
与web.xml 同级的
创建mvc的配置文件 (它扫描的是controller )
Spring的配置文件:
负责数据源的需要导入c3p0:
1、开启扫描业务逻辑扫描
2、配置数据源(需要c3p0jar包)
4、整合mybatis ,IOC容器一启动就创建出SqlSessionFactory对象 (之前很多在全局配置文件中的配置,成了一些bean的属性了对于配置来说。全局配置文件可以没有了哦,但是一般建议留下,做一些比较犄角旮旯的配置用的)
配置数据源
配置 xml的映射文件路径地址
全局配置文件的路径地址(建议留下的)
5、spring事务管理 并且开启基于注解的事务
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:context="http://www.springframework.org/schema/context" xmlns:mybatis-spring="http://mybatis.org/schema/mybatis-spring" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://mybatis.org/schema/mybatis-spring http://mybatis.org/schema/mybatis-spring-1.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd"> <!-- Spring希望管理所有的业务逻辑组件,等。所以要除去负责页面跳转的controller --> <context:component-scan base-package="com.atguigu.mybatis"> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" /> </context:component-scan> <!-- 引入数据库的配置文件 --> <context:property-placeholder location="classpath:dbconfig.properties" /> <!-- Spring用来控制业务逻辑。数据源、事务控制、aop c3p0的数据源--> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="jdbcUrl" value="${jdbc.url}"></property> <property name="driverClass" value="${jdbc.driver}"></property> <property name="user" value="${jdbc.username}"></property> <property name="password" value="${jdbc.password}"></property> </bean> <!-- spring事务管理 管理 ref="dataSource"这个数据源 --> <bean id="dataSourceTransactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"></property> </bean> <!-- 开启基于注解的事务 --> <tx:annotation-driven transaction-manager="dataSourceTransactionManager"/> <!-- 整合mybatis 目的:1、spring管理所有组件。mapper的实现类。 service==>Dao @Autowired:自动注入mapper; 2、spring用来管理事务,spring声明式事务 --> <!--创建出SqlSessionFactory对象 --> <bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource"></property> <!-- 指定数据源(是spring提供的哈) --> <!-- configLocation指定全局配置文件的位置 --> <property name="configLocation" value="classpath:mybatis-config.xml"></property> <!-- 同时可以结合配置文件哦 --> <!--mapperLocations: 指定mapper .xml文件的位置--> <property name="mapperLocations" value="classpath:mybatis/mapper/*.xml"></property> </bean> <!--配置一个可以进行批量执行的sqlSession --> <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate"> <constructor-arg name="sqlSessionFactory" ref="sqlSessionFactoryBean"></constructor-arg> <constructor-arg name="executorType" value="BATCH"></constructor-arg> </bean> <!-- 扫描所有的mapper接口的实现,让这些mapper能够自动注入(使用@autowired就可以获取哦);base-package:指定mapper接口的包名 --> <mybatis-spring:scan base-package="com.atguigu.mybatis.dao"/> <!-- 这两个标签都可以 --> <!-- <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.atguigu.mybatis.dao"></property> </bean> --> </beans>
sql映射
<?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.atguigu.mybatis.dao.EmployeeMapper"> <!-- public Employee getEmpById(Integer id); --> <select id="getEmpById" resultType="com.atguigu.mybatis.bean.Employee"> select * from tbl_employee where id=#{id} </select> <!--public List<Employee> getEmps(); --> <select id="getEmps" resultType="com.atguigu.mybatis.bean.Employee"> select * from tbl_employee </select> </mapper>
dbconfig.properties
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/mybatis?allowMultiQueries=true
jdbc.username=root
jdbc.password=123456
orcl.driver=oracle.jdbc.OracleDriver
orcl.url=jdbc:oracle:thin:@localhost:1521:orcl
orcl.username=scott
orcl.password=123456
mybatis-config.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> <settings> <setting name="mapUnderscoreToCamelCase" value="true"/> <setting name="jdbcTypeForNull" value="NULL"/> <!--显式的指定每个我们需要更改的配置的值,即使他是默认的。防止版本更新带来的问题 --> <setting name="cacheEnabled" value="true"/> <setting name="lazyLoadingEnabled" value="true"/> <setting name="aggressiveLazyLoading" value="false"/> </settings> <databaseIdProvider type="DB_VENDOR"> <property name="MySQL" value="mysql"/> <property name="Oracle" value="oracle"/> <property name="SQL Server" value="sqlserver"/> </databaseIdProvider> </configuration>
spring-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:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd"> <!--SpringMVC只是控制网站跳转逻辑 --> <!-- 只扫描控制器 --> <context:component-scan base-package="com.atguigu.mybatis" use-default-filters="false"> <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> <!-- 视图解析器 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/pages/"></property> <property name="suffix" value=".jsp"></property> </bean> <!-- 处理动态资源 --> <mvc:annotation-driven></mvc:annotation-driven> <!-- 处理动态资源 --> <mvc:default-servlet-handler/> </beans>
web.xml
<?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" 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>MyBatis_06_ssm</display-name> <!--Spring配置: needed for ContextLoaderListener --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> </context-param> <!-- Bootstraps the root web application context before servlet initialization --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- SpringMVC配置 --> <!-- The front controller of this Spring Web application, responsible for handling all application requests --> <servlet> <servlet-name>spring</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <!-- Map all requests to the DispatcherServlet for handling --> <servlet-mapping> <servlet-name>spring</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>
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