複習之SpringBoot應用（一）——SpringBoot檔案上傳
阿新 • • 發佈：2018-12-18
檔案上傳可以說開發人員的基本技能
SpringBoot專案結構與ssm有很大區別，檔案上傳也有差異
- 頁面
<!DOCTYPE html> <html> <head> <title>檔案上傳示例</title> </head> <body> <h2>檔案上傳示例</h2> <hr/> <form method="POST" enctype="multipart/form-data" action="/recruit/upload"> <p> 檔案：<input type="file" name="img" /> </p> <p> <input type="submit" value="上傳" /> </p> </form> </body> </html>
- 後臺檔案上傳處理 檔案上傳一般在Controller實現 FileUploadController檔案
//spring boot 實現上傳圖片 @PostMapping("upload") @ResponseBody public String upload(@RequestParam("img") MultipartFile img, HttpServletResponse response) throws IOException { String result=null; response.setHeader("content-type","text/html;charset=UTF-8"); if (!img.isEmpty()) { // 獲取檔名 String fileName = img.getOriginalFilename(); //生成隨機檔名 String name =UUID.randomUUID().toString().replaceAll("-", ""); // 獲取檔案的字尾名 String suffixName = fileName.substring(fileName.lastIndexOf(".")); log.info("上傳的檔案字尾名為：" + suffixName); //判斷檔案的型別是否為指定的檔案型別 if (!filterType(img.getContentType())) { result = "error:" + img.getContentType()+ " type not upload file type"; }else { try { BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(new File("D://upload/" + name+suffixName))); out.write(img.getBytes()); out.flush(); out.close(); } catch (FileNotFoundException e) { e.printStackTrace(); result = "upload file failed !"; } catch (IOException e) { e.printStackTrace(); result = "upload file failed !"; } result = "upload file success !"; } }else{ result="upload file failed !"; } return result; } /** * 指定的上傳型別 zip 和 圖片格式的檔案 */ private static final String[] types = { "application/x-zip-compressed", "ZIP", "image/pjpeg","image/x-png","image/jpeg","image/jpg" ,"image/JPG","image/png","image/PNG"}; //"application/octet-stream; charset=utf-8", /*** * 判斷檔案的型別是否為指定的檔案型別 * @return */ public boolean filterType(String imgType) { boolean isFileType = false; for (String type : types) { if (type.equals(imgType)) { isFileType = true; break; } } return isFileType; }
- 配置Bean來設定檔案大小
@Configuration public class FileUploadConfiguration { @Bean public MultipartConfigElement multipartConfigElement(){ MultipartConfigFactory factory =new MultipartConfigFactory(); //檔案大小 factory.setMaxFileSize("2MB"); //檔案存放臨時資料夾 factory.setLocation("C://TEMP/"); return factory.createMultipartConfig(); } }
執行結果：成功！
