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### 框架整合思路 springmvc+mybaits的系统架构 ![image.png](https://upload-images.jianshu.io/upload_images/468490-13fd2e79aa8c910c.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240) spring将各层进行整合 通过spring管理持久层的mapper(相当于dao接口) 通过spring管理业务层service,service中可以调用mapper接口。 spring进行事务控制。 通过spring管理表现层Controller,Controller中可以调用service接口。 mapper、service、Controller都是javabean,可以由spring来进行统一管理。 第一步: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。 第二步: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。 第三步:整合springmvc 由于springmvc是spring的模块,不需要整合。 #### 所需的jar包 mysql数据库驱动包: mybatis的jar包 mybatis和spring整合包 log4j包 druid数据库连接池包 spring所有jar包(4.x搭配jdk8,3.x搭配jdk7) jstl包 ### 工程结构 ![image.png](https://upload-images.jianshu.io/upload_images/468490-8d100ea0ddfc78a0.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240) ### 整合dao 数据库服务器配置文件 在classpath下创建db.properties ``` #配置信息采取name = value的形式 #1.配置驱动程序 jdbc.driver =com.mysql.jdbc.Driver #2.配置数据库url jdbc.url = jdbc:mysql://localhost:3306/coder_school?useUnicode=true&amp;characterEncoding=UTF-8 #3.配置用户名 jdbc.username=root #4.配置用户密码 jdbc.password=root ``` 日志配置文件 在classpath下创建log4j.properties ``` # Global logging configuration #\u751F\u4EA7\u73AF\u5883\u914D\u7F6Einfo ERROR log4j.rootLogger=DEBUG,stdout # MyBatis logging configuration... log4j.logger.org.mybatis.example.BlogMapper=TRACE # Console output... log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.layout=org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n ``` Mybatis配置文件 在classpath下创建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> <typeAliases> <package name="school.coder.domain"></package> </typeAliases> </configuration> ``` spring管理SqlSessionFactory、mapper 在classpath下创建spring/ applicationContext-dao.xml 配置数据源 ``` <?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: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 "> <!-- 加载db.properties文件中的内容,db.properties文件中key命名要有一定的特殊规则 --> <context:property-placeholder location="classpath:db.properties" /> <!-- 配置数据源 ,dbcp --> <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close"> <!-- 基本属性 url、user、password --> <property name="url" value="${jdbc.url}" /> <property name="username" value="${jdbc.username}" /> <property name="password" value="${jdbc.password}" /> <!-- 配置初始化大小、最小、最大 --> <property name="initialSize" value="1" /> <property name="minIdle" value="1" /> <property name="maxActive" value="20" /> <!-- 配置获取连接等待超时的时间 --> <property name="maxWait" value="60000" /> <!-- 配置间隔多久才进行一次检测,检测需要关闭的空闲连接,单位是毫秒 --> <property name="timeBetweenEvictionRunsMillis" value="60000" /> <!-- 配置一个连接在池中最小生存的时间,单位是毫秒 --> <property name="minEvictableIdleTimeMillis" value="300000" /> <property name="validationQuery" value="SELECT 'x'" /> <property name="testWhileIdle" value="true" /> <property name="testOnBorrow" value="false" /> <property name="testOnReturn" value="false" /> <!-- 打开PSCache,并且指定每个连接上PSCache的大小 --> <property name="poolPreparedStatements" value="true" /> <property name="maxPoolPreparedStatementPerConnectionSize" value="20" /> <!-- 配置监控统计拦截的filters,去掉后监控界面sql无法统计 --> <property name="filters" value="stat" /> </bean> <!-- sqlSessionFactory --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <!-- 数据库连接池 --> <property name="dataSource" ref="dataSource" /> <!-- 加载mybatis的全局配置文件 --> <property name="configLocation" value="classpath:mybatis/sqlMapConfig.xml" /> </bean> <!-- mapper扫描器 --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <!-- 扫描包路径,如果需要扫描多个包,中间使用半角逗号隔开 --> <property name="basePackage" value="school.coder.mapper"></property> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" /> </bean> </beans> ``` ### 整合service Spring管理service bean,并进行事务控制 定义service接口 ``` <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 "> <context:component-scan base-package="school.coder.service.impl"></context:component-scan> <!-- <bean id="ibs" class="com.neusoft.service.impl.AccountServiceImpl"/> <bean id="ius" class="com.neusoft.service.impl.UserServiceImpl"/> --> </beans> ``` 在applicationContext-transaction.xml中使用spring声明式事务控制方法 ``` <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 "> <!-- 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"> <property name="dataSource" ref="dataSource"/> </bean> <tx:annotation-driven transaction-manager="transactionManager"></tx:annotation-driven> </beans> ``` 测试service,在方法实现上添加 @Transactional注解测试事务是否生效。 springmvc.xml配置文件 在classpath下创建spring/springmvc.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/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 http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd"> <mvc:annotation-driven/> <mvc:resources location="/assets/" mapping="/assets/**"/> <!-- 文件上传 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="maxUploadSize" value="10000000"></property> <property name="defaultEncoding" value="UTF-8"></property> </bean> <!-- 配置自动扫描的包 --> <context:component-scan base-package="school.coder.controller"></context:component-scan> <!-- 配置视图解析器 如何把handler 方法返回值解析为实际的物理视图 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/"/> <property name="suffix" value=".jsp"> </property> </bean> <mvc:interceptors> <!--如果配置了多个拦截器,则按顺序执行 --> <!-- 登陆认证拦截器 --> <mvc:interceptor> <!-- /**表示所有url包括子url路径 --> <mvc:mapping path="/admin/**"/> <mvc:exclude-mapping path="/admin/login"/> <bean class="school.coder.interceptor.AdminLoginInterceptor"></bean> </mvc:interceptor> </mvc:interceptors> </beans> ``` web.xml配置文件 配置前端控制器 在web.xml中,添加spring容器监听器,加载spring容器。 ``` <?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"> <!-- tomcat服务器,一启动马上读取spring/applicationContext-*.xml --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring/applicationContext-*.xml</param-value> </context-param> <!-- tomcat服务器,一启动就加载spring框架的ContextLoaderListener 意味着,spring容器启动,开始作用 --> <listener> <listener-class> org.springframework.web.context.ContextLoaderListener </listener-class> </listener> <servlet> <servlet-name>springDispatcherServlet</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>springDispatcherServlet</servlet-name> <url-pattern>/</url-pattern> <!-- 拦截不了.jsp文件 --> </servlet-mapping> <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> </web-app> ``` 三大框架整合完毕,编写测试程序验证。