Mybatis Plus 实现批量插入的示例代码

<!--mybatis plus extension,包含了mybatis plus core-->
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-extension</artifactId>
    <version>3.4.0</version>
</dependency>

import com.baomidou.mybatisplus.core.injector.AbstractMethod;
import com.baomidou.mybatisplus.core.injector.DefaultSqlInjector;
import com.baomidou.mybatisplus.extension.injector.methods.InsertBatchSomeColumn;
import java.util.List;

/**
 * @author: jichunyang
 * @description: 自定义数据方法注入
 * @date: 2020/12/18 14:15
 **/
public class EasySqlInjector extends DefaultSqlInjector {

    @Override
    public List<AbstractMethod> getMethodList(Class<?> mapperClass) {
        List<AbstractMethod> methodList = super.getMethodList(mapperClass);
        methodList.add(new InsertBatchSomeColumn());
        return methodList;
    }
}

//开启事务
@EnableTransactionManagement
@Configuration
@MapperScan("扫描的mapper包路径")
public class MybatisPlusConfig {
	
	//需要注入的Bean
	@Bean
    public EasySqlInjector easySqlInjector() {
        return new EasySqlInjector();
    }
    
	@Bean("sqlSessionFactory")
    public SqlSessionFactory sqlSessionFactory() throws Exception {
        MybatisSqlSessionFactoryBean sqlSessionFactory = new MybatisSqlSessionFactoryBean();
        // 其他配置项
        ......
        sqlSessionFactory.setGlobalConfig(globalConfiguration());
        return sqlSessionFactory.getObject();
    }

    @Bean
    public GlobalConfig globalConfiguration() {
        GlobalConfig conf = new GlobalConfig();
        // 自定义的注入需要在这里进行配置
        conf.setSqlInjector(easySqlInjector());
        return conf;
    }
}

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import java.util.List;

public interface EasyBaseMapper<T> extends BaseMapper<T> {

    /**
     * 批量插入 仅适用于mysql
     * @param entityList 实体列表
     * @return 影响行数
     */
    Integer insertBatchSomeColumn(List<T> entityList);
}

import org.apache.ibatis.annotations.Mapper;

/**
 * @author jichunyang
 * @description 用户Mapper
 */
@Mapper
public interface UserMapper extends EasyBaseMapper<User> {

}

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.stereotype.Service;

@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {
	
    @Override
    @Transactional
    public void insertUsers(List<User> users) {
	    // 这里使用了自定义的批量插入,baseMapper可以直接使用，不需要声明
	    baseMapper.insertBatchSomeColumn(users);
	}
}