提交花城代码

mitao

2025-02-21 31573d6180d15ef65ed0df9c2732495f40b12663

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package com.panzhihua.common.listen;
 
import java.util.ArrayList;
import java.util.List;
 
import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.alibaba.fastjson.JSONObject;
import com.panzhihua.common.exceptions.ServiceException;
import com.panzhihua.common.model.vos.R;
import com.panzhihua.common.model.vos.community.ComMngCarExcelVO;
import com.panzhihua.common.service.community.CommunityService;
 
import lombok.extern.slf4j.Slf4j;
 
/**
 * @description: 车辆导入监听
 * @author: Null
 * @date: 2021/3/11 13:26
 */
@Slf4j
public class ComMngCarExcelListen extends AnalysisEventListener<ComMngCarExcelVO> {
 
    private static final int BATCH_COUNT = 1000;
    private CommunityService communityService;
    private Long communityId;
    private List<ComMngCarExcelVO> list = new ArrayList<>();
 
    public ComMngCarExcelListen(CommunityService communityService, Long communityId) {
        this.communityService = communityService;
        this.communityId = communityId;
    }
 
    @Override
    public void invoke(ComMngCarExcelVO comMngCarExcelVO, AnalysisContext analysisContext) {
        list.add(comMngCarExcelVO);
        // 达到BATCH_COUNT了，需要去存储一次数据库，防止数据几万条数据在内存，容易OOM
        if (list.size() >= BATCH_COUNT) {
            log.info("excel导入数据【{}】", JSONObject.toJSONString(list));
            R r = this.communityService.listSaveMngCarExcelVO(list, this.communityId);
            if (!R.isOk(r)) {
                throw new ServiceException(r.getMsg());
            }
            list.clear(); // 清空list
        }
 
    }
 
    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {
        log.info("excel导入数据【{}】", JSONObject.toJSONString(list));
        R r = this.communityService.listSaveMngCarExcelVO(list, this.communityId);// 确保最后遗留的数据保存在数据库中
        if (!R.isOk(r)) {
            throw new ServiceException(r.getMsg());
        }
    }
}