1丶项目结构

?2丶所需依赖

  <dependencies>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>5.3.2</version>
    </dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.13.2</version>
      <scope>test</scope>
    </dependency>

    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>4.0.1</version>
      <scope>provided</scope>
    </dependency>

    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>

    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.2</version>
      <scope>provided</scope>
    </dependency>

    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>8.0.23</version>
    </dependency>

    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <version>1.18.18</version>
    </dependency>

    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.4.6</version>
    </dependency>

    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>2.0.2</version>
    </dependency>
    <!-- 引入数据库连接池，c3p0,dbcp,druid-->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>1.1.8</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>5.3.2</version>
    </dependency>

    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>fastjson</artifactId>
      <version>1.2.47</version>
    </dependency>

    <dependency>
      <groupId>commons-fileupload</groupId>
      <artifactId>commons-fileupload</artifactId>
      <version>1.4</version>
    </dependency>
    <!-- jedis 使用redis-->
    <dependency>
      <groupId>redis.clients</groupId>
      <artifactId>jedis</artifactId>
      <version>2.9.0</version>
    </dependency>
  </dependencies>

3丶配置mybatis-config.xml文件

<?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>
        <!--严格区分大小写，空格-->
        <!--STDOUT_LOGGING标准的日志工厂实现-->
        <setting name="logImpl" value="STDOUT_LOGGING"/>
        <!--autoMappingBehavior开启resultMap自动装配  普通列自动映射,对象列不自动映射-->
        <setting name="autoMappingBehavior" value="FULL"/>
        <!--开启二级缓存(Mapper)-->
       <!-- <setting name="cacheEnabled" value="true"/>-->
    </settings>
    <typeAliases>
        <!--扫描实体类中的别名,扫描后映射文件查询的返回值可以不写entity包-->
        <package name="entity"/>
    </typeAliases>
</configuration>

4丶配置springmvc-servlet.xml文件

<?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/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd">
        <!--支持mvc注解-->
        <mvc:annotation-driven></mvc:annotation-driven>
        <!--扫描Controller包-->
        <context:component-scan base-package="controller"></context:component-scan>

        <!--放行jsp所有静态资源-->
        <mvc:default-servlet-handler></mvc:default-servlet-handler>
        <!--配置文件上传组装说明书-->
        <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
            <!--设置文件上传最大大小(字节)-->
            <property name="maxUploadSize" value="500000"></property>
            <!--设置文件上传格式-->
            <property name="defaultEncoding" value="UTF-8"></property>
        </bean>

</beans>

5丶配置database.properties文件

driver=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://localhost:3306/t139test?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf-8
user=root
password=123123
minIdle=45
maxIdle=50
initialSize=5
maxActive=100
maxWait=100
removeAbandonedTimeout=180
removeAbandoned=true

6丶配置applicationContext-mybatis.xml文件

<?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"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="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.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/aop
        https://www.springframework.org/schema/aop/spring-aop.xsd">
   <!--扫描注解-->
    <context:component-scan base-package="service,mapper"/>
    <!--读取数据库配置文件-->
    <context:property-placeholder location="classpath:database.properties"/>
    <!-- JNDI获取数据源(使用dbcp连接池) -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" destroy-method="close" scope="singleton">
        <property name="driverClassName" value="${driver}" />
        <property name="url" value="${url}" />
        <property name="username" value="${user}" />
        <property name="password" value="${password}" />
        <property name="initialSize" value="${initialSize}"/>
        <property name="maxActive" value="${maxActive}"/>
        <property name="maxIdle" value="${maxIdle}"/>
        <property name="minIdle" value="${minIdle}"/>
        <property name="maxWait" value="${maxWait}"/>
        <property name="removeAbandonedTimeout" value="${removeAbandonedTimeout}"/>
        <property name="removeAbandoned" value="${removeAbandoned}"/>
        <!-- sql 心跳 -->
        <!--开启Evict的定时校验，循环校验  -->
        <property name= "testWhileIdle" value="true"/>
        <!-- 在进行borrowObject处理时，会对拿到的 连接进行校验-false-->
        <property name= "testOnBorrow" value="false"/>
        <!-- 在进行ruturnObject处理时，会对返回的连接进行校验-false -->
        <property name= "testOnReturn" value="false"/>
        <!-- 校验使用的sql语句，validatetionQuery，复杂的校验sql会影响性能 -->
        <property name= "validationQuery" value="select 1"/>
        <!-- 定义Evict的时间间隔，单位：毫秒 -->
        <property name= "timeBetweenEvictionRunsMillis" value="60000"/>
        <!-- 配置每次校验连接的数量，一般等于maxActive -->
        <property name= "numTestsPerEvictionRun" value="${maxActive}"/>
    </bean>
    <!--事务管理-->
    <bean id="transactionManager"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

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

    <!--接口扫描包-->
    <!--优先扫描接口中的注解,没有的话会自动去找xml映射文件-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="mapper"/>
    </bean>
</beans>

7丶配置web.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="4.0">
  <!--关联spring核心配置文件,让其生效-->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext-*.xml</param-value>
  </context-param>
<!--过滤乱码问题-->
  <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>

  <!--整个项目的监听器,如果缺失那么整个项目的配置文件将会找不到-->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>

  <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>

  <welcome-file-list>
    <welcome-file></welcome-file>
  </welcome-file-list>

</web-app>