SSM+Mybatis-plus整合细节(全网最细【像针一样】，配完必定不出问题，如果出了当我没说【那就必定是你自身的问题，你比我还细】)

首先导入如下依赖：

pom.xml

  <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>5.2.8.RELEASE</version>
    </dependency>

    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>8.0.21</version>
    </dependency>

    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>1.1.19</version>
    </dependency>

    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <version>1.18.12</version>
    </dependency>

    <dependency>
      <groupId>com.baomidou</groupId>
      <artifactId>mybatis-plus</artifactId>
      <version>3.0.6</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>5.2.8.RELEASE</version>
    </dependency>

    <dependency>
      <groupId>io.springfox</groupId>
      <artifactId>springfox-swagger2</artifactId>
      <version>2.4.0</version>
    </dependency>
    
    <dependency>
      <groupId>io.springfox</groupId>
      <artifactId>springfox-swagger-ui</artifactId>
      <version>2.4.0</version>
    </dependency>

敲黑板：注意这里--------此处SSM整合MybatisPlus的时候必须要导入这个 依赖spring-jdbc（狗东西）【导入这个依赖的原因是MybatisPlus中的一些东西用到了spring-jdbc所以需要导入】，笔者springboot玩多了，想用SSM整合一下MybatisPlus的时候出现了好多问题就是因为此。

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: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">

    <!-- 扫描指定包下的注解 -->
    <context:component-scan base-package="com.llq">
        <!-- 不扫描指定的注解 -->
         <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" />
    </context:component-scan>

    <context:property-placeholder location="classpath:jdbc.properties"></context:property-placeholder>
    <bean class="com.alibaba.druid.pool.DruidDataSource" id="dataSource">
        <property name="username" value="${jdbc.username}"></property>
        <property name="password" value="${jdbc.password}"></property>
        <property name="url" value="${jdbc.url}"></property>
        <property name="driverClassName" value="${jdbc.driverClassName}"></property>
    </bean>

    <!-- 配置和mybatis的整合 -->
    <bean id="sqlSessionFactory" 	class="com.baomidou.mybatisplus.extension.spring.MybatisSqlSessionFactoryBean">
        <!-- 指定mybatis 全局配置文件的位置 -->
        <property name="mapperLocations" value="classpath:com/llq/dao/*.xml"/>
        <property name="typeAliasesPackage" value="com.com.llq.pojo"></property>
        <property name="dataSource" ref="dataSource"></property>
    </bean>

    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.baomidou.mybatisplus.samples.quickstart.mapper"/>
    </bean>

</beans>

jdbc.properties:

jdbc.username = root
jdbc.password= 123
jdbc.url = jdbc:mysql:///carsys?serverTimezone=Asia/Shanghai
jdbc.driverClassName = com.mysql.cj.jdbc.Driver

springMvc.xml:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">
<!--  包扫描器     -->
    <context:component-scan base-package="com.llq"></context:component-scan>
<!--  默认静态资源  -->
    <mvc:default-servlet-handler/>
<!--  开始注解配置  -->
    <mvc:annotation-driven></mvc:annotation-driven>
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="internalResourceViewResolver">
    </bean>
    <bean class="com.llq.config.SwaggerConfig" />
</beans>

在持久层接口的地方直接让接口去继承Mybatis-Plus的BaseMapper就行。其他的略，毕竟像我们这么聪明的必定可以搞出来其他的。

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.llq.pojo.SysCar;

public interface SysCarMapper extends BaseMapper<SysCar> {
    
    
	//注意这里要填写泛型，就是你要访问数据库的表的实体
}