SSM框架整合(spring+springmvc+mybatis)

本文详细介绍了如何整合SSM框架,包括使用MyBatis进行数据访问,Spring进行业务逻辑管理和事务处理,以及SpringMVC作为表现层。文章还提供了配置文件示例,展示了如何在项目中正确设置和使用这些框架。

摘要生成于 C知道 ,由 DeepSeek-R1 满血版支持, 前往体验 >

一、SSM框架整合思路

1、Dao层

       使用mybatis框架。创建SqlMapConfig.xml

      创建一个applicationContext-dao.xml

        (1)配置数据源

        (2)需要让spring容器管理SqlsessionFactory,单例存在。

        (3)把mapper的代理对象放到spring容器中。使用扫描包的方式加载mapper的代理对象。

2、Service层

       (1)事务管理 applicationContext-trans.xml

      (2)需要把service实现类对象放到spring容器中管理。

3、表现层

      (1)配置注解驱动

      (2)配置视图解析器

      (3)需要扫描controller

4、Web.xml

      (1)spring容器的配置

      (2)Springmvc前端控制器的配置

      (3)Post乱码过滤器

二、框架整合

需要把配置文件放到taotao-manager-web工程下。因为此工程为war工程,其他的工程只是一个jar包。各配置文件位置如图所示:

1、Mybatis整合(SqlMapConfig.xml 、applicationContext-dao.xml)

 (1)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>

</configuration>

(2) applicationContext-dao.xml

      A:注意读取的数据库配置文件的位置,location后面的内容

     B:注意SqlMapConfig.xml文件的位置

     C:注意扫描的包,此处是com.taotao.mapper

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
	xmlns:aop="http://www.springframework.org/schema/aop" 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-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
	http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">

	<!-- 数据库连接池 -->
	<!-- 加载配置文件 -->
	<context:property-placeholder location="classpath:properties/*.properties" />
	<!-- 数据库连接池 -->
	<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
		destroy-method="close">
		<property name="url" value="${jdbc.url}" />
		<property name="username" value="${jdbc.username}" />
		<property name="password" value="${jdbc.password}" />
		<property name="driverClassName" value="${jdbc.driver}" />
		<property name="maxActive" value="10" />
		<property name="minIdle" value="5" />
	</bean>
	<!-- 让spring管理sqlsessionfactory 使用mybatis和spring整合包中的 -->
	<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>
	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<property name="basePackage" value="com.taotao.mapper" />
	</bean>
</beans>

(3)db.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/taotao?characterEncoding=utf-8
jdbc.username=root
jdbc.password=root

2、Service层

(1)applicationContext-service.xml

  此处扫描的包是com.taotao.service

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
	xmlns:aop="http://www.springframework.org/schema/aop" 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-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
	http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">

	<!-- 包扫描器,扫描带@Service注解的类 -->
	<context:component-scan base-package="com.taotao.service"></context:component-scan>
	
</beans>

(2)applicationContext-trans.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:p="http://www.springframework.org/schema/p"
	xmlns:aop="http://www.springframework.org/schema/aop" 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-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
	http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">
	<!-- 事务管理器 -->
	<bean id="transactionManager"
		class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<!-- 数据源 -->
		<property name="dataSource" ref="dataSource" />
	</bean>
	<!-- 通知 -->
	<tx:advice id="txAdvice" transaction-manager="transactionManager">
		<tx:attributes>
			<!-- 传播行为 -->
			<tx:method name="save*" propagation="REQUIRED" />
			<tx:method name="insert*" propagation="REQUIRED" />
			<tx:method name="add*" propagation="REQUIRED" />
			<tx:method name="create*" propagation="REQUIRED" />
			<tx:method name="delete*" propagation="REQUIRED" />
			<tx:method name="update*" propagation="REQUIRED" />
			<tx:method name="find*" propagation="SUPPORTS" read-only="true" />
			<tx:method name="select*" propagation="SUPPORTS" read-only="true" />
			<tx:method name="get*" propagation="SUPPORTS" read-only="true" />
		</tx:attributes>
	</tx:advice>
	<!-- 切面 -->
	<aop:config>
		<aop:advisor advice-ref="txAdvice"
			pointcut="execution(* com.taotao.service.*.*(..))" />
	</aop:config>
</beans>

3、表现层

(1)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: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.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.xsd">
    
    <!-- 配置包扫描器 -->    
    <context:component-scan base-package="com.taotao.controller"></context:component-scan>
    <!-- 配置注解驱动 -->
    <mvc:annotation-driven/>
    <!-- 视图解析器 -->
    <bean
		class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/WEB-INF/jsp/" />
		<property name="suffix" value=".jsp" />
	</bean>
</beans>        

(2)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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
	id="taotao" version="2.5">
	<display-name>taotao-manager</display-name>
	<welcome-file-list>
		<welcome-file>index.html</welcome-file>
		<welcome-file>index.htm</welcome-file>
		<welcome-file>index.jsp</welcome-file>
		<welcome-file>default.html</welcome-file>
		<welcome-file>default.htm</welcome-file>
		<welcome-file>default.jsp</welcome-file>
	</welcome-file-list>
	<!-- 初始化spring容器 -->
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath:spring/applicationContext-*.xml</param-value>
	</context-param>
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>

	<!-- 解决post乱码 -->
	<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>

	<!-- springmvc的前端控制器 -->
	<servlet>
		<servlet-name>taotao-manager</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<!-- contextConfigLocation不是必须的, 如果不配置contextConfigLocation, springmvc的配置文件默认在:WEB-INF/servlet的name+"-servlet.xml" -->
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>classpath:spring/springmvc.xml</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
	</servlet>
	<servlet-mapping>
		<servlet-name>taotao-manager</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>
</web-app>

/:会拦截所有请求包括静态资源。需要在springmvc.xml中添加静态资源的映射,如下图所示:

<!-- 静态资源映射 -->
	<mvc:resources location="/WEB-INF/js/" mapping="/js/**"/>
	<mvc:resources location="/WEB-INF/css/" mapping="/css/**"/>

4、添加静态资源

三、测试整合结果

需求:根据商品id查询商品信息

1、dao层:可以使用逆向工程生成的mapper文件

2、service层:

public interface ItemService {
    TbItem getItemByById(Long itemId);
}
@Service
public class ItemServiceImpl implements ItemService{
	
	@Autowired
	private TbItemMapper itemMapper;

	@Override
	public TbItem getItemByById(Long itemId) {
		//TbItem item = itemMapper.selectByPrimaryKey(itemId);
		
		TbItemExample example = new TbItemExample();
		//创建查询条件
		Criteria criteria = example.createCriteria();
		criteria.andIdEqualTo(itemId);
		List<TbItem> list = itemMapper.selectByExample(example);
		//判断list是否为空
		TbItem tbItem = null;
		if (list != null && list.size() > 0) {
			tbItem = list.get(0);
		}
		return tbItem;
	}

}

3、Controller层

@Controller
public class ItemController {
	
	@Autowired 
	private ItemService itemService;
	
	@RequestMapping("/item/{itemId}")
	@ResponseBody
	private TbItem geTbItemById(@PathVariable Long itemId){
		TbItem item = itemService.getItemByById(itemId);
		return item;
	}
}

4、访问 http://localhost:8080/item/536563

报错:

 

解决方法:

修改taotao-manager-dao的pom文件

在taotao-manager-dao/pom.xml文件中添加如下内容:

<!-- 如果不添加此节点mybatis的mapper.xml文件都会被漏掉。 -->
	<build>
		<resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
        </resources>
	</build>

5、再次访问 http://localhost:8080/item/536563

评论
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值