Java MultipartFile实现上传文件/上传图片

import org.springframework.stereotype.Component;import java.io.File;import java.util.Arrays;import java.util.List;@Componentpublic 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. 上传接口

@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', '请选择图片！');return result; } // 源文件名称 final String originalFileName = multfiles[0].getOriginalFilename(); if (StringUtils.isBlank(originalFileName)) {result.put('message', '请选择图片！');return result; } // 文件后缀[.jpg] final String suffix = originalFileName.substring(originalFileName.lastIndexOf('.')).toLowerCase(); if (!FileUtil.IMAGE_EXTENSIONS.contains(suffix)) {result.put('message', '图片格式错误！');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', '图片上传失败！');return result; }result.put('message', '上传成功！');result.put('url', fileUrl);return result; }3. 上传成功

url => http://127.0.0.1:9000/temp/2019-09-12/14/0eac00b96f134652b34172e84febe8d1.jpg

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