目录
一、整合方式
二、实例
1、Spring整合SpringMVC
2、Spring整合mybatis
SpringMVC——day03——SSM整合
一定是用Spring去整合另两个框架
注解+XML
1)spring配置:创建applicationContext.xml文件进行配置。
我们不在applicationContext.xml配置对controller的扫描,我们在springmvc.xml中配置对controller的扫描,那么思考一个问题:
我们如何把service注入到controller中 ?
解决方式,我们只需要在启动服务器时就加载spring文件,具体实现下面会说
<?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: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.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"> <!-- 开启注解扫描,只处理 service 与 dao --> <context:component-scan base-package="com.mvc" > <!-- 配置那些不需要扫描 ,不扫描controller,controller是交给SpringMVC配置的--> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> </beans>2)SpringMVC配置,创建springmcv.xml进行配置
<?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" 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-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"> <!-- 配置controller扫描包,扫描注解 --> <context:component-scan base-package="com.mvc"> <!-- 只扫描controller --> <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> <!-- 配置视图解析器 ,前端控制器通过视图解析器找到后台返回的数据该发给哪个页面 --> <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/pages/"/> <property name="suffix" value=".jsp"/> </bean> <!-- 前端控制器,哪些静态资源不拦截 --> <mvc:resources mapping="/js/**" location="/js/**" /> <!-- 配置异常处理器 --> <bean id="SysExceptionResolver" class="com.mvc.exception.SysExceptionResolver" /> <!-- 开启SpringMVC注解的支持 --> <mvc:annotation-driven /> </beans>
3)项目
web.xml
<web-app xmlns="http://java.sun.com/xml/ns/javaee" version="2.5"> <!-- 核心控制器(前端控制器)的配置 --> <servlet> <servlet-name>dispatcherServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!-- 加载SpringMVC的核心配置文件 --> <init-param> <!-- 指定SpringMVC核心配置文件的路径。如果不指定,默认为/WEB-INF/${servlet-name}-servlet.xml --> <param-name>contextConfigLocation</param-name> <param-value>classpath:springmvc.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <!--拦截所有请求,所有请求都要经过dispatcherServlet--> <servlet-mapping> <servlet-name>dispatcherServlet</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <!-- 配置解决中文乱码的过滤器--> <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> </filter> <filter-mapping> <filter-name>characterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> </web-app>实体类:
Service:
public interface AccountService { //查询所有账户 public String findAll(); //添加账户 public void saveAccount(Account account); }ServiceImpl:
@Service public class AccountServiceImpl implements AccountService { public String findAll(){ System.out.println("业务层代码执行了"); return "sjioqw"; } public void saveAccount(Account account) { } }Controller:
@Controller @RequestMapping("/account") public class AccountController { @Autowired priva AccountService accountService; @RequestMapping("/findAll") public String findAll(){ System.out.println("表现层代码执行了"); accountService.findAll(); return "success"; } }到这里,我们发现,下面这段代码报错了。因为web.xml只加载了springMVC配置文件,没有人去加载spring.xml文件,也就是没有把service对象放进IOC,当然不能注入啦
@Autowired AccountService accountService;
为解决这个问题,我们需要让Tomcat服务器启动时就加载spring.xml。我们知道JavaWeb有一个ServletContext对象,生命周期与服务器一样,他有一类监听器,监听ServletContext对象的创建与销毁,且至在服务器启动时执行一次。所以我们可以让监听器去加载Spring配置文件,创建web1版本的工厂,存在ServletContext对象中。
Spring的spring-web已经给我们提供好了这个监听器类,我们只需要在web.xml中加入如下代码,去配置spring监听器
<web-app> <!-- 配置spring监听器,默认只加载WEN-INT下的applicationContext.xml文件 --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- 配置路径 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> </context-param> </web-app>那么我们的Spring与SpringMVC就整合好了运行代码
控制台会打印:
表现层代码执行了 业务层代码执行了
目的:用spring创建代理,存到 IOC容器中
1)配置:
jdbc.propties:
jdbc.driver = com.mysql.jdbc.Driver jdbc.url = jdbc:mysql://localhost:3306/spring4_demo03_tx?serverTimezone=GMT&useUnicode=true&characterEncoding=utf-8 jdbc.username = root jdbc.password =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: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.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"> <!-- 开启注解扫描,只处理 service 与 dao --> <context:component-scan base-package="com.mvc" > <!-- 配置那些不需要扫描 --> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> <!-- Spring整合mybatis --> <!-- 1、配置连接池 --> <context:property-placeholder location="classpath:jdbc.properties" /> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driverClass" value="${jdbc.driver}" /> <property name="jdbcUrl" value="${jdbc.url}" /> <property name="user" value="${jdbc.username}" /> <property name="password" value="${jdbc.password}" /> </bean> <!-- 2、配置SqlSessionFactory工厂 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> </bean> <!-- 3、配置accountDao接口所在的包 --> <bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.mvc.dao"/> </bean> </beans>2)声明式事务管理的配置
<!-- 配置声明式事务管理 --> <!-- 1、配置事务管理器 --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> <!-- 2、配置事务通知 --> <tx:advice id="txAdvice" transaction-manager="transactionManager"> <tx:attributes> <!-- 设置隔离级别、传播行为等一些行为 --> <tx:method name="find*" read-only="true"/> <tx:method name="*" isolation="DEFAULT"></tx:method> </tx:attributes> </tx:advice> <!-- 3、配置Aop增强 --> <aop:config> <!-- 配置切入点 --> <aop:advisor advice-ref="txAdvice" pointcut="execution(* com.mvc.service.impl.*ServiceImpl.*(..))" /> </aop:config>完结,撒花花