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、整合方式
一定是用Spring去整合另两个框架
注解+XML
二、实例
1、Spring整合SpringMVC
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
2、Spring整合mybatis
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