Springboot上傳與下載檔案
阿新 • • 發佈：2019-01-12
- application.yml
#設定靜態資源路徑
resources:
static-locations: classpath:static/,file:static/
#檔案大小
servlet:
multipart:
max-file-size: 10MB
max-request-size: 10MB- Springboot上傳檔案(單個檔案)
uploadImg.html檔案：
<!DOCTYPE html> <html lang="en"> <head> <meta name="keywords" content="keyword1,keyword2,keyword3"/> <meta name="description" content="this is my page"/> <meta name="content-type" content="text/html; charset=UTF-8"/> <title>Title</title> </head> <body> <form enctype="multipart/form-data" method="post" action="/uploadImg"> 檔案：<input type="file" name="file"/> <input type="submit" value="上傳"/> </form> </body> </html>
UploadImgController檔案:
/** * 上傳單個檔案 * @param file * @param request * @return * @throws Exception */ @PostMapping("/uploadImg") @ResponseBody public String uploadImg(@RequestParam("file") MultipartFile file, HttpServletRequest request)throws Exception{ if(file.isEmpty()){ return "請選擇檔案上傳"; } String contentType = file.getContentType(); String fileName = file.getOriginalFilename(); // String filePath = "D:\\fileupload\\";//固定儲存路徑 // String filePath = request.getSession().getServletContext().getRealPath("/imgupload"); //log.info("filepath="+ClassUtils.getDefaultClassLoader().getResource("").getPath());//輸出： F:/tonglingling/springbootDemo1/target/classes/ try { File path=new File(ResourceUtils.getURL("classpath:").getPath()); File targetFile=new File(path.getAbsolutePath(),"static/fileupload/");//jar包下面的target目錄 if(!targetFile.exists()){ targetFile.mkdirs(); } log.info("targer="+targetFile); // F:\tonglingling\springbootDemo1\target\classes\static\fileupload FileOutputStream out = new FileOutputStream(targetFile+"/"+fileName); out.write(file.getBytes()); out.flush(); out.close(); // FileUtil.uploadFile(file.getBytes(),filePath,fileName); } catch (Exception e) { e.printStackTrace(); } return "uploadImg Success"; }
- Springboot上傳檔案(多個檔案)
-
/** * 批量上傳圖片 * @param request * @return */ @PostMapping("/batchImg") @ResponseBody public String batchImg(HttpServletRequest request){ List<MultipartFile> files = ((MultipartHttpServletRequest)request).getFiles("file"); MultipartFile file = null; BufferedOutputStream stream = null; for(int i=0;i<files.size();i++){ file = files.get(i); if(!file.isEmpty()){ try { String fileName = file.getOriginalFilename(); File path=new File(ResourceUtils.getURL("classpath:").getPath()); File targetFile=new File(path.getAbsolutePath(),"static/imgupload/");//jar包下面的target目錄 if(!targetFile.exists()){ targetFile.mkdirs(); } byte[] bytes = file.getBytes(); stream = new BufferedOutputStream(new FileOutputStream(new File(targetFile+"/"+fileName))); stream.write(bytes); stream.close(); } catch (IOException e) { stream = null; e.printStackTrace(); return "上傳失敗"+i+"=>"+e.getMessage(); } }else{ return "檔案為空"; } } return "上傳成功"; } - Springboot下載檔案
/**
* 下載檔案
* @param request
* @param response
* @return
* @throws Exception
*/
@GetMapping("/download")
@ResponseBody
public String download(HttpServletRequest request, HttpServletResponse response) throws Exception{
String fileName = "2.jpg";// 檔名
if (fileName != null) {
//設定檔案路徑
// String pathname = "D:\\fileupload\\1.jpg";
File path=new File(ResourceUtils.getURL("classpath:").getPath());
File targetFile=new File(path.getAbsolutePath(),"static/imgupload/");//jar包下面的target目錄
File file = new File(targetFile+"/"+fileName);
if (file.exists()) {
response.setContentType("application/force-download");// 設定強制下載不開啟
response.addHeader("Content-Disposition", "attachment;fileName=" + fileName);// 設定檔名
byte[] buffer = new byte[1024];
FileInputStream fis = null;
BufferedInputStream bis = null;
try {
fis = new FileInputStream(file);
bis = new BufferedInputStream(fis);
OutputStream os = response.getOutputStream();
int i = bis.read(buffer);
while (i != -1) {
os.write(buffer, 0, i);
i = bis.read(buffer);
}
return "下載成功";
} catch (Exception e) {
e.printStackTrace();
} finally {
bis.close();
fis.close();
}
}else{
return "檔案不存在";
}
}
return "下載失敗";
}