文件下载
参照了ruoyi-vue,这样写就行了,原理暂时还没弄懂
前端代码
//要请求的地址
let url = baseUrl + '/attachment/download?id=2'
//直接打开
window.open(url)
后端代码
@GetMapping("/download")
public void fileDownload(String fileName, Boolean delete, HttpServletResponse response, HttpServletRequest request)
{
try
{
if (!FileUtils.checkAllowDownload(fileName))
{
throw new Exception(StringUtils.format("文件名称({})非法,不允许下载。 ", fileName));
}
String filePath = RuoYiConfig.getDownloadPath() + fileName;
StringBuilder contentDispositionValue = new StringBuilder();
contentDispositionValue.append("attachment; filename=")
.append(percentEncodedFileName)
.append(";")
.append("filename*=")
.append("utf-8''")
.append(percentEncodedFileName);
//重点是要加上这些字段,加上后会自动识别
response.addHeader("Access-Control-Expose-Headers", "Content-Disposition,download-filename");
response.setHeader("Content-disposition", contentDispositionValue.toString());
response.setHeader("download-filename", percentEncodedFileName);
FileUtils.writeBytes(filePath, response.getOutputStream());
if (delete)
{
FileUtils.deleteFile(filePath);
}
}
catch (Exception e)
{
log.error("下载文件失败", e);
}
}