1.创建maven结构web程序
    先实现2个小处理：
    ①更换更高版本的web.xml
    ②引入servlet依赖https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api/4.0.1
    2.创建包目录
    3.引入整合需要的jar文件
    *spring-context（aop、bean、core）、aspectjweaver
    *spring-web、spring-webmvc、apache-commons-fileupload、jackson
    *mybatis、mysql
    *mybatis-spring，spring-jdbc、spring-tx、druid（dbcp、c3p0）
    *servlet、jstl、poi……
    pom.xml

    1. <?xml version="1.0" encoding="UTF-8"?>
    2. <project xmlns="http://maven.apache.org/POM/4.0.0"
    3.          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    4.          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    5.     <modelVersion>4.0.0</modelVersion>
    7.     <groupId>com.duyi</groupId>
    8.     <artifactId>SSMIntegrate</artifactId>
    9.     <version>1.0-SNAPSHOT</version>
    11.     <properties>
    12.         <maven.compiler.source>8</maven.compiler.source>
    13.         <maven.compiler.target>8</maven.compiler.target>
    14.     </properties>
    16.     <dependencies>
    17.         <!-- https://mvnrepository.com/artifact/com.google.guava/guava -->
    18.         <dependency>
    19.             <groupId>com.google.guava</groupId>
    20.             <artifactId>guava</artifactId>
    21.             <version>30.1-jre</version>
    22.         </dependency>
    24.         <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
    25.         <dependency>
    26.             <groupId>javax.servlet</groupId>
    27.             <artifactId>javax.servlet-api</artifactId>
    28.             <version>4.0.1</version>
    29.             <scope>provided</scope>
    30.         </dependency>
    32.         <!--spring-->
    33.         <!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->
    34.         <dependency>
    35.             <groupId>org.springframework</groupId>
    36.             <artifactId>spring-context</artifactId>
    37.             <version>5.2.12.RELEASE</version>
    38.         </dependency>
    40.         <!-- https://mvnrepository.com/artifact/org.aspectj/aspectjweaver -->
    41.         <dependency>
    42.             <groupId>org.aspectj</groupId>
    43.             <artifactId>aspectjweaver</artifactId>
    44.             <version>1.9.6</version>
    45.             <scope>runtime</scope>
    46.         </dependency>
    48.         <!--springmvc-->
    49.         <dependency>
    50.             <groupId>org.springframework</groupId>
    51.             <artifactId>spring-web</artifactId>
    52.             <version>5.2.12.RELEASE</version>
    53.         </dependency>
    55.         <dependency>
    56.             <groupId>org.springframework</groupId>
    57.             <artifactId>spring-webmvc</artifactId>
    58.             <version>5.2.12.RELEASE</version>
    59.         </dependency>
    61.         <!-- https://mvnrepository.com/artifact/commons-fileupload/commons-fileupload -->
    62.         <dependency>
    63.             <groupId>commons-fileupload</groupId>
    64.             <artifactId>commons-fileupload</artifactId>
    65.             <version>1.4</version>
    66.         </dependency>
    68.         <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
    69.         <dependency>
    70.             <groupId>com.fasterxml.jackson.core</groupId>
    71.             <artifactId>jackson-databind</artifactId>
    72.             <version>2.12.1</version>
    73.         </dependency>
    75.         <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
    76.         <dependency>
    77.             <groupId>org.mybatis</groupId>
    78.             <artifactId>mybatis</artifactId>
    79.             <version>3.5.6</version>
    80.         </dependency>
    82.         <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
    83.         <dependency>
    84.             <groupId>mysql</groupId>
    85.             <artifactId>mysql-connector-java</artifactId>
    86.             <version>8.0.23</version>
    87.         </dependency>
    89.         <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
    90.         <dependency>
    91.             <groupId>org.mybatis</groupId>
    92.             <artifactId>mybatis-spring</artifactId>
    93.             <version>2.0.6</version>
    94.         </dependency>
    96.         <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
    97.         <dependency>
    98.             <groupId>org.springframework</groupId>
    99.             <artifactId>spring-jdbc</artifactId>
    100.             <version>5.2.12.RELEASE</version>
    101.         </dependency>
    103.         <!-- https://mvnrepository.com/artifact/org.springframework/spring-tx -->
    104.         <dependency>
    105.             <groupId>org.springframework</groupId>
    106.             <artifactId>spring-tx</artifactId>
    107.             <version>5.2.12.RELEASE</version>
    108.         </dependency>
    110.         <!-- https://mvnrepository.com/artifact/org.apache.poi/poi -->
    111.         <dependency>
    112.             <groupId>org.apache.poi</groupId>
    113.             <artifactId>poi</artifactId>
    114.             <version>4.1.2</version>
    115.         </dependency>
    117.         <!-- https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml -->
    118.         <dependency>
    119.             <groupId>org.apache.poi</groupId>
    120.             <artifactId>poi-ooxml</artifactId>
    121.             <version>4.1.2</version>
    122.         </dependency>
    124.     </dependencies>
    126. </project>

    4.搭建springmvc（spring，ss整合）
    引入jar文件（之前引入过了）
    配置web.xml
    配置监听，服务器启动时，就启动spring容器（启动spring框架）
    配置servlet核心入口，启动springmvc框架
    web.xml

    <?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring.xml</param-value>
    </context-param>

    <servlet>
        <servlet-name>mvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:mvc.xml</param-value>
        </init-param>
        <load-on-startup>0</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>mvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

</web-app>

    image.png
    根据web.xml的配置，创建两个配置文件spring.xml、mvc.xml
    spring.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:mvc="http://www.springframework.org/schema/mvc"
       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
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        https://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/aop
        https://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/tx
        https://www.springframework.org/schema/tx/spring-tx.xsd
        http://www.springframework.org/schema/mvc
        https://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!--开启IOC，DI注解编程（@Controller、@Autowire）-->
    <context:component-scan base-package="com.duyi"></context:component-scan>
    <!--开启aop注解编程-->
    <aop:aspectj-autoproxy></aop:aspectj-autoproxy>

</beans>

    mvc.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:mvc="http://www.springframework.org/schema/mvc"
       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
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        https://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/aop
        https://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/tx
        https://www.springframework.org/schema/tx/spring-tx.xsd
        http://www.springframework.org/schema/mvc
        https://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!--controller包中的类可能会处理请求-->
    <context:component-scan base-package="com.duyi.controller"></context:component-scan>
    <!--开启请求响应注解编程-->
    <mvc:annotation-driven></mvc:annotation-driven>
    <!--处理静态资源 html、js、css、jpg......-->
    <mvc:default-servlet-handler></mvc:default-servlet-handler>

</beans>

    5.搭建mybatis框架
    引入jar（之前引入过了）
    创建核心配置文件
    原来主要配置数据库连接信息（数据源），sql关联信息
    未来sm整合后，数据源信息就由spring管理，mybatis中就不需要配置