01

新建java web项目

直接在myeclipse中，新建一个web项目即可。

02

导入jar包

将SSM所需的jar包复制到项目的/WebRoot/WEB-INF/lib中，在这里我整理了下，大致需要34个jar文件，复制完之后，选中所有jar包，右击—Build Path-->Add to Build Path。

03

配置web.xml文件。

web.xml文件需要配置三部分信息，spring、springmvc以及解决springmvc传值乱码的过滤器，分别如下：

spring配置信息：

<listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:applicationContext.xml</param-value></context-param>

springmvc配置信息：

<servlet><servlet-name>springmvc</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:springmvc-servlet.xml</param-value></init-param><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>springmvc</servlet-name><url-pattern>/</url-pattern></servlet-mapping>

设置编码格式的过滤器信息：

<!-- 解决springmvc传递值乱码问题 --><filter><filter-name>encodingFilter</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>encodingFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping>

04

配置Spring配置文件

applicationContext.xml文件，里面需要包含这些信息：用来连接数据库的数据源信息

<!-- 配置数据源--><bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"><property name="driverClassName" value="com.mysql.jdbc.Driver"></property><property name="url" value="jdbc:mysql://localhost:3306/schooldb"></property><property name="username" value="root"></property><property name="password" value="root"></property></bean>

加载mybatis-config.xml文件以及sql映射文件的SqlSessionFactory：

<!--sqlSessionFactory --><bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><property name="dataSource" ref="dataSource"></property><property name="configLocation" value="classpath:mybatis-config.xml"></property><property name="mapperLocations"><list><value>classpath:org/dao/*.xml</value></list></property></bean>

Mapper注入映射器的MapperScannerConfigurer：

<!-- 配置自动映射器 --><bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"><property name="basePackage" value="org.dao"></property></bean>

最后就是扫描注解的配置：

<!-- 扫描所有注解信息 --><context:component-scan base-package="org.dao,org.service,org.web"/><mvc:annotation-driven/>

05

配置springmvc的信息

springmvc-servlet.xml中需要包含最基本的两个部分，扫描注解和springmvc请求的前缀后缀设置：

<!-- 扫描注解 --><context:component-scan base-package="org.web,org.dao,org.service"/><mvc:annotation-driven/><!-- 配置前缀和后缀 --><bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="prefix" value="/"></property><property name="suffix" value=".jsp"></property></bean>

06

配置mybatis配置文件

本文件简单点，就配置个别名和打印sql语句就行，都是可选的：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configurationPUBLIC "-//mybatis.org//DTD Config 3.0//EN""http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration><settings><!-- 打印sql语句 --><setting name="logImpl" value="STDOUT_LOGGING" /></settings><!-- 起别名 --><typeAliases><package name="org.entity"/></typeAliases></configuration>

附录：

spring配置文件（applicationContext.xml）：

<?xml version="1.0" encoding="UTF-8"?>
<beansxmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:p="http://www.springframework.org/schema/p"xmlns:aop="http://www.springframework.org/schema/aop"xmlns:mvc="http://www.springframework.org/schema/mvc"xmlns:context="http://www.springframework.org/schema/context"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsdhttp://www.springframework.org/schema/p http://www.springframework.org/schema/p/spring-p-3.1.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsdhttp://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd"><!-- 配置数据源--><bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"><property name="driverClassName" value="com.mysql.jdbc.Driver"></property><property name="url" value="jdbc:mysql://localhost:3306/schooldb"></property><property name="username" value="root"></property><property name="password" value="root"></property></bean><!--sqlSessionFactory --><bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><property name="dataSource" ref="dataSource"></property><property name="configLocation" value="classpath:mybatis-config.xml"></property><property name="mapperLocations"><list><value>classpath:org/dao/*.xml</value></list></property></bean><!-- 配置自动映射器 --><bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"><property name="basePackage" value="org.dao"></property></bean><!-- 扫描所有注解信息 --><context:component-scan base-package="org.dao,org.service,org.web"/><mvc:annotation-driven/></beans>

springmvc配置文件（springmvc-servlet.xml）：

<?xml version="1.0" encoding="UTF-8"?>
<beansxmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:p="http://www.springframework.org/schema/p"xmlns:aop="http://www.springframework.org/schema/aop"xmlns:mvc="http://www.springframework.org/schema/mvc"xmlns:context="http://www.springframework.org/schema/context"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsdhttp://www.springframework.org/schema/p http://www.springframework.org/schema/p/spring-p-3.1.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsdhttp://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd"><!-- 扫描注解 --><context:component-scan base-package="org.web,org.dao,org.service"/><mvc:annotation-driven/><!-- 配置前缀和后缀 --><bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="prefix" value="/"></property><property name="suffix" value=".jsp"></property></bean></beans>

web.xml文件：

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" 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"><display-name></display-name>  <welcome-file-list><welcome-file>index.jsp</welcome-file></welcome-file-list><!-- springmvc的配置 --><servlet><servlet-name>springmvc</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:springmvc-servlet.xml</param-value></init-param><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>springmvc</servlet-name><url-pattern>/</url-pattern></servlet-mapping><!-- spring --><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:applicationContext.xml</param-value></context-param><!-- 监听配置 --><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><!-- 解决springmvc传递值乱码问题 --><filter><filter-name>encodingFilter</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>encodingFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping></web-app>

配置到此结束，明天带着大家实现一遍SSM的增删改查案例。

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2021-01-10