EasyExcel导出功能的实现

EasyExcel导出功能的实现

1. Service层解析Excel数据

public List<ExcelDictDTO> listDictData() {
    
    
    List<Dict> dictList = baseMapper.selectList(null);
    //创建ExcelDictDTO列表，将Dict列表转换成ExcelDictDTO列表
    ArrayList<ExcelDictDTO> excelDictDTOList = new ArrayList<>(dictList.size());
    dictList.forEach(dict -> {
    
    
        ExcelDictDTO excelDictDTO = new ExcelDictDTO();
        BeanUtils.copyProperties(dict, excelDictDTO);
        excelDictDTOList.add(excelDictDTO);
    });
    return excelDictDTOList;
}

2. Controller层接收客户端请求

@ApiOperation("Excel数据的导出")
@GetMapping("/export")
public void export(HttpServletResponse response){
    
    
    try {
    
    
        // 这里使用swagger 会导致各种问题，请直接用浏览器或者用postman
        response.setContentType("application/vnd.ms-excel");
        response.setCharacterEncoding("utf-8");
        // 这里URLEncoder.encode可以防止中文乱码 当然和easyexcel没有关系
        String fileName = URLEncoder.encode("mydict", "UTF-8").replaceAll("\\+", "%20");
        response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + fileName + ".xlsx");
        EasyExcel.write(response.getOutputStream(), ExcelDictDTO.class).sheet("数据字典").doWrite(dictService.listDictData());

    } catch (IOException e) {
    
    
        //EXPORT_DATA_ERROR(104, "数据导出失败"),
        throw  new BusinessException(ResponseEnum.EXPORT_DATA_ERROR, e);
    }    
}