SSM整合

 整合思路

1、Dao层：

Mybatis的配置文件：SqlMapConfig.xml

不需要配置任何内容，需要有文件头。文件必须存在。

applicationContext-dao.xml：

mybatis整合spring，通过由spring创建数据库连接池，spring管理SqlSessionFactory、mapper代理对象。需要mybatis和spring的整合包。

2、Service层：

applicationContext-service.xml：

所有的service实现类都放到spring容器中管理。并由spring管理事务。

 

3、表现层：

Springmvc框架，由springmvc管理controller。

Springmvc的三大组件。

1.1. Dao整合

1.1.1. 创建SqlMapConfig.xml配置文件

PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">

 

1.1.2. Spring整合mybatis

创建applicationContext-dao.xml

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-4.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.2.xsd"> destroy-method="close">

db.properties

jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/e3mall?characterEncoding=utf-8 jdbc.username=root jdbc.password=root

 

备注：

Druid是目前最好的数据库连接池，在功能、性能、扩展性方面，都超过其他数据库连接池，包括DBCP、C3P0、BoneCP、Proxool、JBoss DataSource。

Druid已经在阿里巴巴部署了超过600个应用，经过多年多生产环境大规模部署的严苛考验。

 

1.2. Service整合

1.2.1. 管理Service

 

1.2.2. 事务管理

创建applicationContext-trans.xml

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-4.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.2.xsd"> class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> pointcut="execution(* cn.e3mall.service..*.*(..))" />

 

1.3. 表现层整合

1.3.1. Springmvc.xml

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" xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"  xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd         http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd         http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd         http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd"> class="org.springframework.web.servlet.view.InternalResourceViewResolver"> class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

 

1.3.2. 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" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5"> <display-name>e3-managerdisplay-name> <welcome-file-list> <welcome-file>index.jspwelcome-file> welcome-file-list> <context-param> <param-name>contextConfigLocationparam-name> <param-value>classpath:spring/applicationContext*.xmlparam-value> context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class> listener> <filter> <filter-name>CharacterEncodingFilterfilter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class> <init-param> <param-name>encodingparam-name> <param-value>utf-8param-value> init-param> filter> <filter-mapping> <filter-name>CharacterEncodingFilterfilter-name> <url-pattern>/*url-pattern> filter-mapping>     <servlet> <servlet-name>e3-managerservlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class> <init-param> <param-name>contextConfigLocationparam-name> <param-value>classpath:spring/springmvc.xmlparam-value> init-param> <load-on-startup>1load-on-startup> servlet> <servlet-mapping> <servlet-name>e3-managerservlet-name> <url-pattern>/url-pattern> servlet-mapping> web-app>