最近在做项目的时候，有些明细数据，一条一条的插入太费资源和时间，所以得需要批量插入，今晚闲来无事写个小demo。

新建工程

    <dependency><groupId>org.mybatis.spring.boot</groupId><artifactId>mybatis-spring-boot-starter</artifactId><version>2.3.1</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-web</artifactId></dependency>

工程目录

application.properties配置

spring.datasource.url=jdbc:mysql://127.0.0.1:3306/dblog
spring.datasource.username=root
spring.datasource.password=666666
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
mybatis.mapper-locations=classpath:config/*Mapper.xml
mybatis.type-aliases-package=com.zy.entity

teacher表结构

mybatis语句

<insert id="insertTeacher">insert into teacher (name, age, sex) values<foreach collection="list" separator="," item="item">(#{item.name}, #{item.age}, #{item.sex})</foreach></insert>

接口定义

@Repository
public interface TeacherMapper {public int insertTeacher(List<Teacher> teacher);
}

测试代码

@RestController
public class MybatisController {@Autowiredpublic TeacherMapper teacherMapper;@GetMapping("teachers")public String teachers() {Long a = System.currentTimeMillis();for (int t=0;t<100;t++) {List<Teacher> teachers = new ArrayList<>();for (int n=0;n<1000;n++) {Teacher teacher = new Teacher();teacher.setName("李继"+t+""+n);teacher.setAge(35);teacher.setSex("男");teachers.add(teacher);}teacherMapper.insertTeacher(teachers);}long s = (System.currentTimeMillis()-a)/1000;System.out.println(s);return "success:"+s;}}

启动类

@SpringBootApplication
@MapperScan(basePackages = "com.zy.dao", annotationClass = Repository.class)
public class MybatisDemoApplication {public static void main(String[] args) {SpringApplication.run(MybatisDemoApplication.class, args);}}

测试结果

插入1万条数据用时1秒，插入10万条数据用时10秒。