EasyExcel-导入文件

controller类

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

service

package com.atguigu.yygh.cmn.service;

import com.atguigu.yygh.model.cmn.Dict;
import com.baomidou.mybatisplus.extension.service.IService;
import org.springframework.web.multipart.MultipartFile;


public interface DictService extends IService<Dict> {

    void importDictData(MultipartFile file);
}

service实现类

package com.atguigu.yygh.cmn.service.impl;

import com.alibaba.excel.EasyExcel;
import com.atguigu.yygh.cmn.listener.DictListener;
import com.atguigu.yygh.cmn.mapper.DictMapper;
import com.atguigu.yygh.cmn.service.DictService;
import com.atguigu.yygh.model.cmn.Dict;
import com.atguigu.yygh.vo.cmn.DictEeVo;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;


@Service
public class DictServiceImpl extends ServiceImpl<DictMapper, Dict> implements DictService {
    @Autowired
    private DictMapper dictMapper;
    
    @Override
    public void importDictData(MultipartFile file) {
        try {
            EasyExcel.read(file.getInputStream(), DictEeVo.class,new DictListener(dictMapper))
                    .sheet().doRead();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
}

监听器

package com.atguigu.yygh.cmn.listener;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.atguigu.yygh.cmn.mapper.DictMapper;
import com.atguigu.yygh.model.cmn.Dict;
import com.atguigu.yygh.vo.cmn.DictEeVo;
import org.springframework.beans.BeanUtils;

public class DictListener extends AnalysisEventListener<DictEeVo> {
    private DictMapper dictMapper;
    //使用构造器注入dictMapper
    public DictListener(DictMapper dictMapper) {
        this.dictMapper = dictMapper;
    }

    //一行一行的读取，从第2行开始
    @Override
    public void invoke(DictEeVo dictEeVo, AnalysisContext analysisContext) {
        Dict dict = new Dict();
        BeanUtils.copyProperties(dictEeVo,dict);
        dictMapper.insert(dict);
    }

    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {

    }
}

前端

<el-button type="text" @click="importData"><i class="fa fa-plus"/> 导入</el-button>

<el-dialog title="导入" :visible.sync="dialogImportVisible" width="480px">
      <el-form label-position="right" label-width="170px">

      <el-form-item label="文件">
      <el-upload
      :multiple="false"
      <!--成功后回调的方法-->
      :on-success="onUploadSuccess"
      :action="'http://localhost:8202/admin/cmn/dict/importData'"
      class="upload-demo">
      <el-button size="small" type="primary">点击上传</el-button>
      <div slot="tip" class="el-upload__tip">只能上传excel文件，且不超过500kb</div>
      </el-upload>
      </el-form-item>

      </el-form>
      <div slot="footer" class="dialog-footer">
      <el-button @click="dialogImportVisible = false">
            取消
      </el-button>
      </div>
    </el-dialog>