@Test
    public void testInsertMore(){
        //批量添加
        //INSERT INTO user ( id, name, age ) VALUES ( ?, ?, ? )
        List<User> list = new ArrayList<>();
        for (int i = 1; i <= 10; i++) {
            User user = new User();
            user.setName("ybc"+i);
            user.setAge(20+i);
            list.add(user);
        }
        boolean b = userService.saveBatch(list);
        System.out.println(b);
    }

        <!--mybatis-plus啟動(dòng)器-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.5.1</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-extension</artifactId>
            <version>3.5.1</version>
        </dependency>

import com.baomidou.mybatisplus.annotation.FieldFill;
import com.baomidou.mybatisplus.core.injector.AbstractMethod;
import com.baomidou.mybatisplus.core.injector.DefaultSqlInjector;
import com.baomidou.mybatisplus.core.metadata.TableInfo;
import com.baomidou.mybatisplus.extension.injector.methods.InsertBatchSomeColumn;
 
import java.util.List;
 
public class EasySqlInjector extends DefaultSqlInjector {
 
 
    @Override
    public List<AbstractMethod> getMethodList(Class<?> mapperClass, TableInfo tableInfo) {
        // 注意：此SQL注入器繼承了DefaultSqlInjector(默認(rèn)注入器)，調(diào)用了DefaultSqlInjector的getMethodList方法，保留了mybatis-plus的自帶方法
        List<AbstractMethod> methodList = super.getMethodList(mapperClass, tableInfo);
        methodList.add(new InsertBatchSomeColumn(i -> i.getFieldFill() != FieldFill.UPDATE));
        return methodList;
    }
 
}

@Configuration
public class MyBatisPlusConfig {
 
    @Bean
    public MybatisPlusInterceptor mybatisPlusInterceptor(){
        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
        //添加分頁(yè)插件
        interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.MYSQL));
        //添加樂觀鎖插件
        interceptor.addInnerInterceptor(new OptimisticLockerInnerInterceptor());
        return interceptor;
    }
 
    @Bean
    public EasySqlInjector easySqlInjector() {
        return new EasySqlInjector();
    }
 
}

public interface EasyBaseMapper<T> extends BaseMapper<T> {
    /**
     * 批量插入 僅適用于mysql
     *
     * @param entityList 實(shí)體列表
     * @return 影響行數(shù)
     */
    Integer insertBatchSomeColumn(Collection<T> entityList);
}

@Repository
public interface UserMapper<T> extends EasyBaseMapper<User> {
 
 
}

@SpringBootApplication
@MapperScan("com.atguigu.mybatisplus.mapper")
public class MybatisplusApplication {
 
    public static void main(String[] args) {
        SpringApplication.run(MybatisplusApplication.class, args);
    }
 
}

@SpringBootTest
public class MyBatisPlusServiceTest {
 
 
    @Autowired
    private UserMapper userMapper;
 
 
    @Test
    public void testInsertMore(){
        //批量添加
        //INSERT INTO user ( id, name, age ) VALUES ( ?, ?, ? )
        List<User> list = new ArrayList<>();
        for (int i = 1; i <= 10; i++) {
            User user = new User();
            user.setName("ybc"+i);
            user.setAge(20+i);
            list.add(user);
        }
        userMapper.insertBatchSomeColumn(list);
 
    }
 
}