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>   <load20000-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 configuration  PUBLIC "-//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"?><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: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.xsd  http://www.springframework.org/schema/p  http://www.springframework.org/schema/p/spring-p-3.1.xsd  http://www.springframework.org/schema/aop  http://www.springframework.org/schema/aop/spring-aop-3.1.xsd  http://www.springframework.org/schema/mvc  http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd  http://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"?><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: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.xsd  http://www.springframework.org/schema/p  http://www.springframework.org/schema/p/spring-p-3.1.xsd  http://www.springframework.org/schema/aop  http://www.springframework.org/schema/aop/spring-aop-3.1.xsd  http://www.springframework.org/schema/mvc  http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd  http://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