SSM(Sping+SpringMVC+MyBatis)搭建与配置
使用Idea新建一个简单的web项目,***项目结构***如下:
导包
1.Spring与MyBatis集成
1.1 数据库配置文件
jdbc.properites
jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql:///mybatis
jdbc.username=root
jdbc.password=147258
1.2 Spring核心配置文件
applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
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.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
">
<!--
db.properties -> datasource -> SqlSessionFactory ->mapper(接口,xml)->service->controller
Spring集成MyBatis (MyBatis操作数据库的对象交给Spring管理)
1.需要把SqlSessionFactory让Spring来管理
2.数据源(四大金刚) 3.别名的问题 4.可以找到mapper.xml
-->
<context:component-scan base-package="cn.dieu.ssm.service" />
<!--引入外部的db.properties-->
<context:property-placeholder location="classpath:jdbc.properties" />
<!--配置dbcp连接池-->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</bean>
<bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!--配置数据源-->
<property name="dataSource" ref="dataSource" />
<!--配置别名-->
<property name="typeAliasesPackage" value="cn.dieu.ssm.domain" />
<!--扫描 mapper.xml-->
<property name="mapperLocations" value="classpath:cn/dieu/ssm/mapper/*.xml" />
</bean>
<!--配置对应的MapperBean:只能配置一个Mapper,太多的话就很麻烦-->
<!--
<bean id="departmentMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">
<property name="sqlSessionFactory" ref="sessionFactory" />
<property name="mapperInterface" value="cn.dieu.ssm.mapper.ProductDirMapper" />
</bean>
-->
<!--一劳永逸的配置Mapper的方案-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!--扫描的包的配置-->
<property name="basePackage" value="cn.dieu.ssm.mapper" />
<property name="sqlSessionFactoryBeanName" value="sessionFactory" />
</bean>
<!--配置一个事务对象-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<!--事务的注解支持-->
<tx:annotation-driven transaction-manager="transactionManager" />
</beans>
2.Spring与SpringMVC集成
2.1 SpringMVC核心配置文件
applicationContext-mvc.xml
<?xml version="1.0" encoding="UTF-8"?>
<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.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
">
<!--扫描相应的controller-->
<context:component-scan base-package="cn.dieu.ssm.controller" />
<!--静态资源放行-->
<mvc:default-servlet-handler />
<!--springMVC的注解支持-->
<mvc:annotation-driven />
<!--视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/" />
<property name="suffix" value=".jsp" />
</bean>
<!--
在SpringMVC中引入Spring的配置文件,是可以集成运行的,但是后期可能无法集成其他框架(shiro)
-->
<!--<import resource="classpath:applicationContext.xml" />-->
</beans>
Web项目配置文件
当我们启动一个WEB项目容器时,容器包括(JBoss,Tomcat等)。首先会去读取web.xml配置文件里的配置,当这一步骤没有出错并且完成之后,项目才能正常的被启动起来。
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app 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"
version="3.0">
<!-- 解决编码问题 -->
<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>
<!--读取Spring的核心配置文件-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<!--直接启动Spring-->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!--配置核心控制器-->
<servlet>
<servlet-name>dispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!--SpringMVC的配置文件-->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext-mvc.xml</param-value>
</init-param>
<!--随着tomcat启动而启动-->
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>