mybatis-plus 3.4.3.1 进行批量 saveOrUpdate

• service类通过 SqlHelper.saveOrUpdateBatch 实现通过自定义的 唯一索引 进行 批量保存更新

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import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.enums.SqlMethod;
import com.baomidou.mybatisplus.core.toolkit.CollectionUtils;
import com.baomidou.mybatisplus.core.toolkit.ReflectionKit;
import com.baomidou.mybatisplus.core.toolkit.StringUtils;
import com.baomidou.mybatisplus.extension.toolkit.SqlHelper;
import org.apache.ibatis.binding.MapperMethod;
import org.springframework.stereotype.Service;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;

import cn.com.redboard.modules.mi.base.entity.MesProdMiProc;
import cn.com.redboard.modules.mi.base.mapper.MesProdMiProcMapper;
import cn.com.redboard.modules.mi.base.service.IMesProdMiProcService;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

/**
 * @Description: MI工艺流程Service
 * @Author: wqc
 * @Date:   2022-03-01
 * @Version: V1.0
 */
@Service
public class MesProdMiProcServiceImpl extends ServiceImpl<MesProdMiProcMapper, MesProdMiProc> implements IMesProdMiProcService {

    @Override
    @Transactional(propagation = Propagation.REQUIRES_NEW, rollbackFor = Exception.class)
    public void sync(List<MesProdMiProc> prodMiProcList) {

        // 每2000条语句，进行一次sqlSession.flushStatements()
        SqlHelper.saveOrUpdateBatch(this.entityClass, this.mapperClass, this.log, prodMiProcList, 2000, (sqlSession, entity) -> {
            MapperMethod.ParamMap param = new MapperMethod.ParamMap();

            Object erpProcessId = ReflectionKit.getFieldValue(entity, ${otherUniqueIdx});
            LambdaQueryWrapper<MesProdMiProc> queryWrapper = new LambdaQueryWrapper<>();
            queryWrapper.eq(MesProdMiProc::getErpProcessId, erpProcessId);
            // 自定义查询条件
            param.put("ew", queryWrapper);

            // 判断记录是否存在，存在则更新，否则插入
            return StringUtils.checkValNull(erpProcessId) || CollectionUtils.isEmpty(sqlSession.selectList(this.getSqlStatement(SqlMethod.SELECT_LIST), param));
        }, (sqlSession, entity) -> {
            MapperMethod.ParamMap param = new MapperMethod.ParamMap();
            // 需要更新的当前记录实体
            param.put("et", entity);

            LambdaQueryWrapper<MesProdMiProc> queryWrapper = new LambdaQueryWrapper<>();
            queryWrapper.eq(MesProdMiProc::getErpProcessId, ReflectionKit.getFieldValue(entity, ${otherUniqueIdx}));

            // 自定义查询条件

            param.put("ew", queryWrapper);

            sqlSession.update(this.getSqlStatement(SqlMethod.UPDATE), param);
        });

    }

}

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• SqlHelper.saveOrUpdateBatch具体源码

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• SqlHelper.executeBatch具体源码