easyExcel导入

1.控制层

@PostMapping("/importData")
public Result importDict(MultipartFile file) {
   String s= dictService.importDictData(file);
    return Result.ok(s);
}

2.业务层:

@Override
@CacheEvict(value = "dict", allEntries=true)
public String importDictData(MultipartFile file) {
    try {
        ExcelReadListener listener = new ExcelReadListener();

        EasyExcel.read(file.getInputStream(),DictEeVo.class,listener).sheet().doRead();
        List lists = listener.getList();
        for (DictEeVo list : lists) {
           if (list.getName()==null){
               return "姓名不可以为空";
           }
        }

    } catch (IOException e) {
        e.printStackTrace();
    }
    return "挺好的";
}

3.监听器

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.alibaba.fastjson.JSON;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.ArrayList;
import java.util.List;


public class ExcelReadListener extends AnalysisEventListener {

    private Logger logger = LoggerFactory.getLogger(this.getClass());
    /**
     * 每隔5条存储数据库，实际使用中可以3000条，然后清理list ，方便内存回收
     */
    List list = new ArrayList<>();

    public List getList() {
        return list;
    }

    public void setList(List list) {
        this.list = list;
    }

    // private  Tservice;
  /*  public ExcelListener( service) {
        this.service = service;
    }*/
    @Override
    public void invoke(T t, AnalysisContext analysisContext) {
        logger.info("解析到一条数据:{}", JSON.toJSONString(t));
        list.add(t);
     /*   if (list.size() >= BATCH_COUNT) {
            saveData();
            // 存储完成清理 list
            list.clear();
        }*/
    }

    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {
// 这里也要保存数据，确保最后遗留的数据也存储到数据库
        logger.info("{}条数据，开始存储数据库！", list.size());
        logger.info("所有数据解析完成！");

        //logger.info("所有数据解析完成！");
    }
    /**
     * 加上存储数据库
     */

}

4.excel中的bean和对应数据库里的bean

5.结果