Mybatis 大数据量的批量insert解决方案

方案一，直接利用mybatis mapper的api

	@Service
	public class ProposedService{
	 @Autowired
	 SqlSessionFactory sqlSessionFactory;
	 @Transactional
	 public void insertBatch(List tRiskToleranceAnswerList) {
	  SqlSession sqlSession = sqlSessionFactory.openSession(ExecutorType.BATCH);
	  TRiskToleranceAnswerMapper mapper = sqlSession.getMapper(TRiskToleranceAnswerMapper.class);
			for (int i = 0; i < tRiskToleranceAnswerList.size(); i++) {
				mapper.insertSelective(tRiskToleranceAnswerList.get(i));
			}
			sqlSession.flushStatements();
		}
	}

100000条记录 65秒 9个字段 springboot2.0.7 mybatis3.4.6 postgresql9.4

方案二，自定义insert into table values (xxx,xxx,…)

   
    insert into t_risk_tolerance_answer ( )
    values 
      
        (#{item.proposedCd,jdbcType=VARCHAR}, #{item.seq,jdbcType=INTEGER}, #{item.question,jdbcType=VARCHAR}, 
      #{item.answer,jdbcType=ARRAY,typeHandler=handler.ArrayTypeHandler}, 
      #{item.deleteFlg,jdbcType=VARCHAR}, #{item.createDt,jdbcType=TIMESTAMP}, #{item.createUserId,jdbcType=VARCHAR}, 
      #{item.updateDt,jdbcType=TIMESTAMP}, #{item.updateUserId,jdbcType=VARCHAR})
    
     

@Service
public class ProposedService {
@Autowired
SqlSessionFactory sqlSessionFactory;
@Transactional
public void insertBatch(List tRiskToleranceAnswerList) {
	int groupSize = 500;
	int groupNo = tRiskToleranceAnswerList.size() / groupSize;
	SqlSession sqlSession = sqlSessionFactory.openSession(ExecutorType.BATCH);
	TRiskToleranceAnswerMapper mapper = sqlSession.getMapper(TRiskToleranceAnswerMapper.class);

	if (tRiskToleranceAnswerList.size() <= groupSize) {
		mapper.insertBatch(tRiskToleranceAnswerList);
	} else {
		List subList=null;
		for (int i = 0; i < groupNo; i++) {
			subList = tRiskToleranceAnswerList.subList(0, groupSize);
			mapper.insertBatch(subList);
			tRiskToleranceAnswerList.subList(0, groupSize).clear();
		}
		if (tRiskToleranceAnswerList.size() > 0) {
			mapper.insertBatch(tRiskToleranceAnswerList);
		}
	}
	sqlSession.flushStatements();
 }
}

100000条记录 19秒 9个字段 springboot2.0.7 mybatis3.4.6 postgresql9.4