一篇超详细的Spring Boot整合Mybatis文章

三叶草

大家都知道springboot搭建一个spring框架只需要秒秒钟。下面通过实例代码给大家介绍一下springboot与mybatis的完美融合，非常不错，具有参考借鉴价值，感兴趣的朋友一起看看吧
配置文件形式

pom.xml

<?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>2.4.4</version>
    <relativepath/> <!-- lookup parent from repository -->
  </parent>
  <groupid>com.keafmd</groupid>
  <artifactid>spring-boot-09-mybatis</artifactid>
  <version>0.0.1-snapshot</version>
  <name>spring-boot-09-mybatis</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-jdbc</artifactid>
    </dependency>
    <dependency>
      <groupid>org.springframework.boot</groupid>
      <artifactid>spring-boot-starter-web</artifactid>
    </dependency>
    <dependency>
      <groupid>org.mybatis.spring.boot</groupid>
      <artifactid>mybatis-spring-boot-starter</artifactid>
      <version>1.3.2</version>
    </dependency>
    <dependency>
      <groupid>mysql</groupid>
      <artifactid>mysql-connector-java</artifactid>
      <scope>runtime</scope>
    </dependency>
    <dependency>
      <groupid>org.springframework.boot</groupid>
      <artifactid>spring-boot-starter-test</artifactid>
      <scope>test</scope>
    </dependency>
  </dependencies>
  <build>
    <plugins>
      <plugin>
        <groupid>org.springframework.boot</groupid>
        <artifactid>spring-boot-maven-plugin</artifactid>
      </plugin>
    </plugins>
  </build>
 
</project>

配置数据源
在yml文件中配置数据源。

application.yml：

server:
  port: 80
 
# 配置数据源
spring:
  datasource:
  url: jdbc:mysql://127.0.0.1:3306/ssm-java1?usessl=false
  driver-class-name: com.mysql.cj.jdbc.driver
  username: root
  password: 18044229
 
# 整合mybatis
mybatis:
  #  typealiasespackage: com.neuedu.entity
  mapper-locations: classpath*:com/neuedu/boot/mapper/*.xml

usermapper.xml

这里注意!!!:一定是和usermapper相同的目录，是个三级目录，创建时仿照这样创建com/keafm/mapper(正确的) 别这样com.keafam.mapper(错误的)，这样错误的创建的话，是个一级目录，不是三级的，后面运行的时候可能会提示找不到mapper。

<?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.keafmd.mapper.usermapper">
  <select id="list" resulttype="map">
    select * from user
  </select>
</mapper>

usermapper

package com.keafmd.mapper;
import org.apache.ibatis.annotations.mapper;
import java.util.list;
/**
 * keafmd
 *
 * @classname: usermapper
 * @description:
 * @author: 牛哄哄的柯南
 * @date: 2021-04-08 16:09
 * @blog: https://keafmd.blog.csdn.net/
 */
public interface usermapper {
  list list();
}

配置springboot整合mybatis
在application.yml中配置：

# 整合mybatis
mybatis:
  #  typealiasespackage: com.neuedu.entity
  mapper-locations: classpath*:com/neuedu/boot/mapper/*.xml

在运行类上添加@mapperscan注解
springboot09mybatisapplication：

package com.keafmd;
import org.mybatis.spring.annotation.mapperscan;
import org.springframework.boot.springapplication;
import org.springframework.boot.autoconfigure.springbootapplication;
@springbootapplication
@mapperscan("com.keafmd.mapper")
public class springboot09mybatisapplication {
  public static void main(string[] args) {
    springapplication.run(springboot09mybatisapplication.class, args);
  }
}

测试类
usermappertest ：

package com.keafmd.mapper;
import com.keafmd.springboot09mybatisapplication;
import org.junit.jupiter.api.test;
import org.springframework.beans.factory.annotation.autowired;
import org.springframework.boot.test.context.springboottest;
import java.util.list;
import static org.junit.jupiter.api.assertions.*;
@springboottest(classes = springboot09mybatisapplication.class)
class usermappertest {
  @autowired
  usermapper usermapper;
  @test
  void list(){
    list list = usermapper.list();
    for (object o : list) {
      system.out.println(o);
    }
  }
}

效果

总结
本篇文章就到这里了，希望能给你带来帮助，也希望您能够多多关注CodeAE代码之家的更多内容！
原文链接：https://blog.csdn.net/weixin_43883917/article/details/115528174