SpringBoot整合Mybatis（简单详细）IDEA

1.导入依赖（包含个人工程所需）

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.2.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.dxf</groupId>
    <artifactId>springboot_crud</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springboot_crud</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.3</version>
        </dependency>
        <!--mybatis起步依赖-->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.2</version>
        </dependency>
        <!--mysql驱动-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

        <!--thymeleaf-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <!--jquery  http://localhost:8080/webjars/jquery/3.4.1/jquery.js-->
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>jquery</artifactId>
            <version>3.4.1</version>
        </dependency>

        <dependency>
        <groupId>org.mybatis.generator</groupId>
        <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.7</version>
         </dependency>


        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>

            <!-- mybatis-generator自动生成代码插件 -->
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.7</version>
            </plugin>
        </plugins>
    </build>

</project>

2.配置文件

#添加项目名
server.servlet.context-path=/crud
#国际化属性
spring.messages.basename=i18n/login
#禁用缓存，ctrl+F9重新编译网页更改
spring.thymeleaf.cache=false

#数据库连接信息
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.password=root
spring.datasource.username=root
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/exam?serverTimezone=UTC

#配置mybatis
#别名扫描包
mybatis.type-aliases-package=com.dxf.springboot.pojo
mybatis.mapper-locations=classpath:mapper/*Mapper.xml

3.扫描接口

package com.dxf.springboot;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@MapperScan("com.dxf.springboot.mapper")//**注意这里是重点**
@SpringBootApplication
public class SpringbootCrudApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringbootCrudApplication.class, args);
    }

}

4.总结

这个例子是使用mybatis****生成的映射和接口，通过我的另一个文章https://blog.csdn.net/weixin_42408648/article/details/104020750可以结合学习。如果出现Invalid bound statement (not found): com.dxf.springboot.mapper.UserMapper.selectByPrimaryKey错误说明mapper没有交给springboot管理，请检查是否与我上面书写一致。或者检查你的xml映射文件<mapper namespace="com.dxf.springboot.mapper.ClazzMapper">是否和接口位置对应。