1.專案結構

2. web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" id="WebApp_ID" version="4.0">
  <display-name
 
>ssm</display-name>
  <welcome-file-list> 
    <welcome-file>index.jsp</welcome-file> 
  </welcome-file-list>
  
  <!-- 配置SpringIOC容器隨Web.xml一起啟動 -->
  <!-- ContextLoaderListener所需 -->
    <context-param>
        <param-name>contextConfigLocation</
 
param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>
    <!-- 在servlet初始化之前引導根web應用程式上下文 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </
 
listener>
    
    <!-- 配置SpringMVC -->
    <!-- 這個Spring Web應用程式的前端控制器，負責處理所有應用程式請求 -->
    <servlet>
        <servlet-name>springDispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springMVC.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet> 
    <!-- 將所有請求對映到DispatcherServlet進行處理 -->
    <servlet-mapping>
        <servlet-name>springDispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    
    <!-- 將POST請求轉發為PUT和DELETE請求 -->
    <filter>
        <filter-name>HiddenHttpMethodFilter</filter-name>
        <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>HiddenHttpMethodFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping> 
</web-app>

3. 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:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
        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-4.3.xsd">

    <!-- SpringMVC 控制頁面邏輯跳轉 -->
    <!-- 配置自動掃描包，僅掃描@Controller註解 -->
    <context:component-scan base-package="com.ssm" use-default-filters="false">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller" />
    </context:component-scan>

    <!-- 配置檢視直譯器 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/" />
        <property name="suffix" value=".jsp" />
    </bean>

    <!-- 配置靜態資源處理 -->
    <mvc:annotation-driven></mvc:annotation-driven>
    <mvc:default-servlet-handler/> 
</beans>

4 applicatonContext.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:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
        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-4.3.xsd">

    <!-- SpringMVC 控制頁面邏輯跳轉 -->
    <!-- 配置自動掃描包，僅掃描@Controller註解 -->
    <context:component-scan base-package="com.ssm" use-default-filters="false">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller" />
    </context:component-scan>

    <!-- 配置檢視直譯器 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/" />
        <property name="suffix" value=".jsp" />
    </bean>

    <!-- 配置靜態資源處理 -->
    <mvc:annotation-driven></mvc:annotation-driven>
    <mvc:default-servlet-handler/> 
</beans>

5 dbconfig.properties

jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/mybatis?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=GMT%2B8
jdbc.username=root
jdbc.password=123456

6 mybatis-config.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>
    <!-- 全域性設定 -->
    <settings>
        <!-- 開啟駝峰命名規則 -->
        <setting name="mapUnderscoreToCamelCase" value="true" />
        <!-- Oracle資料庫 Null（Other）轉 NULL -->
        <setting name="jdbcTypeForNull" value="NULL" />

        <!--顯式的指定每個我們需要更改的配置的值，即使他是預設的。防止版本更新帶來的問題 -->
        <setting name="cacheEnabled" value="true" />
        <setting name="lazyLoadingEnabled" value="true" />
        <setting name="aggressiveLazyLoading" value="false" />
    </settings>

    <databaseIdProvider type="DB_VENDOR">
        <property name="MySQL" value="mysql" />
        <property name="Oracle" value="oracle" />
        <property name="SQL Server" value="sqlserver" />
    </databaseIdProvider> 
</configuration>

7 EmployeeMapper.xml　　

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
 PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.ssm.dao.EmployeeMapper">

    <select id="getEmployees" resultType="com.ssm.bean.Employee">
        select * from employee
    </select>
</mapper>