Java MultipartFile實現上傳檔案/上傳圖片
阿新 • • 發佈:2020-12-31
1. 判斷允許上傳檔案的 檔案字尾/圖片字尾/相片字尾 和 其它工具類
import org.springframework.stereotype.Component; import java.io.File; import java.util.Arrays; import java.util.List; @Component public class FileUtil { public static final List<String> IMAGE_EXTENSIONS = Arrays.asList(".jpg",".jpeg",".png"); } import java.util.UUID; public class CommonUtil { public static String getUUID() { String uuid = UUID.randomUUID().toString().replaceAll("-",""); return uuid; } } import java.time.LocalDateTime; import java.time.format.DateTimeFormatter; public class DateUtil { public static final String HH = "HH"; public static final String YYYY_MM_DD = "yyyy-MM-dd"; public static final DateTimeFormatter FORMATTER_HH = DateTimeFormatter.ofPattern(HH); public static final DateTimeFormatter FORMATTER_YYYY_MM_DD = DateTimeFormatter.ofPattern(YYYY_MM_DD); public static String getHH() { return FORMATTER_HH.format(LocalDateTime.now()); } public static String getYYYYMMDD() { return FORMATTER_YYYY_MM_DD.format(LocalDateTime.now()); } }
2. 上傳介面
@PostMapping("/updateImage.do") public Map<String,String> updateImage(@RequestParam("image") MultipartFile[] multfiles) { Map<String,String> result = new HashMap<>(); if (multfiles.length == 0) { result.put("message","請選擇圖片!"); return result; } // 原始檔名稱 final String originalFileName = multfiles[0].getOriginalFilename(); if (StringUtils.isBlank(originalFileName)) { result.put("message","請選擇圖片!"); return result; } // 檔案字尾[.jpg] final String suffix = originalFileName.substring(originalFileName.lastIndexOf(".")).toLowerCase(); if (!FileUtil.IMAGE_EXTENSIONS.contains(suffix)) { result.put("message","圖片格式錯誤!"); return result; } String lastFilePath; String newFileName = CommonUtil.getUUID() + suffix; String folderName = File.separator + "temp" + File.separator; String relativePath = folderName + DateUtil.getYYYYMMDD() + File.separator + DateUtil.getHH(); String filePath = "D:\\file" + relativePath; String fileUrl = null; File targetFile = new File(filePath); if (!targetFile.exists()) { targetFile.mkdirs(); } FileOutputStream out = null; try { lastFilePath = filePath + File.separator + newFileName; out = new FileOutputStream(lastFilePath); out.write(multfiles[0].getBytes()); fileUrl = "http://127.0.0.1:9000" + relativePath + File.separator + newFileName; } catch (Exception e) { e.printStackTrace(); } finally { if (out != null) { try { out.flush(); } catch (IOException e) { e.printStackTrace(); } try { out.close(); } catch (IOException e) { e.printStackTrace(); } } } if (fileUrl == null) { result.put("message","圖片上傳失敗!"); return result; } result.put("message","上傳成功!"); result.put("url",fileUrl); return result; }
3. 上傳成功
url => http://127.0.0.1:9000/temp/2019-09-12/14/0eac00b96f134652b34172e84febe8d1.jpg
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