批量更新数据库 Mybatis

MybatisBatchUtils

    int cnt = mybatisBatchUtils.batchUpdateOrInsert(addList, UiConfigDetailMapper.class,
                            (item, uiConfigDetailMapper) -> uiConfigDetailMapper.insertSelective(item));

package cn.XXX.dao.serivce.common;

import com.XXX.doctorusercenter.exception.BusinessException;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.session.ExecutorType;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import java.util.List;
import java.util.function.BiFunction;


@Slf4j
@Component
public class MybatisBatchUtils {

    /**
     * 每次处理1000条
     */
    private static final int BATCH_SIZE = 1000;

    @Resource
    private SqlSessionFactory sqlSessionFactory;

    /**
     * 批量处理修改或者插入
     *
     * @param data        需要被处理的数据
     * @param mapperClass Mybatis的Mapper类
     * @param function    自定义处理逻辑
     * @return int 影响的总行数
     */
    public <T, U, R> int batchUpdateOrInsert(List<T> data, Class<U> mapperClass, BiFunction<T, U, R> function)  {
        int i = 1;
        SqlSession batchSqlSession = sqlSessionFactory.openSession(ExecutorType.BATCH);
        try {
            U mapper = batchSqlSession.getMapper(mapperClass);
            int size = data.size();
            for (T element : data) {
              function.apply(element, mapper);
                if ((i % BATCH_SIZE == 0) || i == size) {
                    batchSqlSession.flushStatements();
                }
                i++;
            }
            // 非事务环境下强制commit，事务情况下该commit相当于无效
            batchSqlSession.commit(true);
        } catch (Exception e) {
            batchSqlSession.rollback();
            // throw new BusinessException(e.getMessage());
            log.error("batchUpdateOrInsert", e);
        } finally {
            batchSqlSession.close();
        }
        return i - 1;
    }
}