\u6587\u4ef6\u4e0a\u4f20\u529f\u80fd\u51e0\u4e4e\u662f\u6bcf\u4e2a Web \u5e94\u7528\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002\u65e0\u8bba\u662f\u4e2a\u4eba\u535a\u5ba2\u4e2d\u7684\u56fe\u7247\u4e0a\u4f20\uff0c\u8fd8\u662f\u4f01\u4e1a\u7ea7\u5e94\u7528\u4e2d\u7684\u6587\u6863\u7ba1\u7406\uff0c\u6587\u4ef6\u4e0a\u4f20\u90fd\u626e\u6f14\u7740\u81f3\u5173\u91cd\u8981\u7684\u89d2\u8272\u3002\u4eca\u5929\uff0c\u677e\u54e5\u548c\u5927\u5bb6\u6765\u804a\u804a\u6587\u4ef6\u4e0a\u4f20\u4e2d\u7684\u51e0\u4e2a\u9ad8\u7ea7\u73a9\u6cd5\u2014\u2014\u79d2\u4f20\u3001\u65ad\u70b9\u7eed\u4f20\u548c\u5206\u7247\u4e0a\u4f20\u3002<\/p>\n
\u5728\u65e5\u5e38\u5f00\u53d1\u4e2d\uff0c\u6587\u4ef6\u4e0a\u4f20\u7684\u573a\u666f\u591a\u79cd\u591a\u6837\u3002\u6bd4\u5982\uff0c\u5728\u7ebf\u6559\u80b2\u5e73\u53f0\u4e0a\u7684\u89c6\u9891\u8d44\u6e90\u4e0a\u4f20\uff0c\u793e\u4ea4\u5e73\u53f0\u4e0a\u7684\u56fe\u7247\u5206\u4eab\uff0c\u4ee5\u53ca\u4f01\u4e1a\u5185\u90e8\u7684\u77e5\u8bc6\u6587\u6863\u7ba1\u7406\u7b49\u3002\u8fd9\u4e9b\u573a\u666f\u5bf9\u6587\u4ef6\u4e0a\u4f20\u7684\u8981\u6c42\u4e5f\u5404\u4e0d\u76f8\u540c\uff0c\u6709\u7684\u8ffd\u6c42\u901f\u5ea6\uff0c\u6709\u7684\u6ce8\u91cd\u7a33\u5b9a\u6027\uff0c\u8fd8\u6709\u7684\u9700\u8981\u8003\u8651\u6587\u4ef6\u5927\u5c0f\u548c\u5b89\u5168\u6027\u3002\u56e0\u6b64\uff0c\u9488\u5bf9\u4e0d\u540c\u9700\u6c42\uff0c\u6211\u4eec\u6709\u4e86\u79d2\u4f20\u3001\u65ad\u70b9\u7eed\u4f20\u548c\u5206\u7247\u4e0a\u4f20\u7b49\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n
\u79d2\u4f20\uff0c\u987e\u540d\u601d\u4e49\uff0c\u5c31\u662f\u51e0\u4e4e\u77ac\u95f4\u5b8c\u6210\u6587\u4ef6\u4e0a\u4f20\u7684\u8fc7\u7a0b\u3002\u5176\u5b9e\u73b0\u539f\u7406\u662f\u901a\u8fc7\u8ba1\u7b97\u6587\u4ef6\u7684\u54c8\u5e0c\u503c\uff08\u5982 MD5 \u6216 SHA-1\uff09\uff0c\u7136\u540e\u5c06\u8fd9\u4e2a\u552f\u4e00\u7684\u6807\u8bc6\u7b26\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u3002\u5982\u679c\u670d\u52a1\u5668\u4e0a\u5df2\u7ecf\u5b58\u5728\u76f8\u540c\u7684\u6587\u4ef6\uff0c\u5219\u76f4\u63a5\u8fd4\u56de\u6210\u529f\u4fe1\u606f\uff0c\u907f\u514d\u4e86\u91cd\u590d\u4e0a\u4f20\u3002\u8fd9\u79cd\u65b9\u5f0f\u4e0d\u4ec5\u8282\u7701\u4e86\u5e26\u5bbd\uff0c\u4e5f\u5927\u5927\u63d0\u9ad8\u4e86\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n
\u65ad\u70b9\u7eed\u4f20\u662f\u6307\u5728\u7f51\u7edc\u4e0d\u7a33\u5b9a\u6216\u8005\u7528\u6237\u4e3b\u52a8\u4e2d\u65ad\u4e0a\u4f20\u540e\uff0c\u80fd\u591f\u4ece\u4e0a\u6b21\u4e2d\u65ad\u7684\u5730\u65b9\u7ee7\u7eed\u4e0a\u4f20\uff0c\u800c\u4e0d\u9700\u8981\u91cd\u65b0\u5f00\u59cb\u6574\u4e2a\u8fc7\u7a0b\u3002\u8fd9\u5bf9\u4e8e\u5927\u6587\u4ef6\u4e0a\u4f20\u5c24\u4e3a\u91cd\u8981\uff0c\u56e0\u4e3a\u5b83\u53ef\u4ee5\u6709\u6548\u9632\u6b62\u56e0\u7f51\u7edc\u95ee\u9898\u5bfc\u81f4\u7684\u4e0a\u4f20\u5931\u8d25\uff0c\u540c\u65f6\u4e5f\u80fd\u8282\u7ea6\u7528\u6237\u7684\u6d41\u91cf\u548c\u65f6\u95f4\u3002<\/p>\n
\u5206\u7247\u4e0a\u4f20\u5219\u662f\u5c06\u4e00\u4e2a\u5927\u6587\u4ef6\u5206\u5272\u6210\u591a\u4e2a\u5c0f\u5757\u5206\u522b\u4e0a\u4f20\uff0c\u6700\u540e\u518d\u7531\u670d\u52a1\u5668\u5408\u5e76\u6210\u5b8c\u6574\u7684\u6587\u4ef6\u3002\u8fd9\u79cd\u505a\u6cd5\u7684\u597d\u5904\u662f\u53ef\u4ee5\u5e76\u884c\u5904\u7406\u591a\u4e2a\u5c0f\u6587\u4ef6\uff0c\u63d0\u9ad8\u4e0a\u4f20\u6548\u7387\uff1b\u540c\u65f6\uff0c\u5982\u679c\u67d0\u4e00\u90e8\u5206\u4e0a\u4f20\u5931\u8d25\uff0c\u53ea\u9700\u8981\u91cd\u4f20\u8fd9\u4e00\u90e8\u5206\uff0c\u4e0d\u5f71\u54cd\u5176\u4ed6\u90e8\u5206\u3002<\/p>\n
\u5728 SpringBoot \u9879\u76ee\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 \u524d\u7aef\u53ef\u4ee5\u901a\u8fc7 JavaScript \u7684 FileReader API \u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9\uff0c\u901a\u8fc7 spark-md5 \u8ba1\u7b97 MD5 \u503c\uff0c\u7136\u540e\u53d1\u9001\u7ed9\u540e\u7aef\u8fdb\u884c\u6821\u9a8c\u3002<\/p>\n \u524d\u7aef\u5206\u4e3a\u4e24\u4e2a\u6b65\u9aa4\uff1a<\/p>\n \u5206\u7247\u4e0a\u4f20\u5173\u952e\u662f\u5728\u524d\u7aef\u5bf9\u6587\u4ef6\u5207\u7247\uff0c\u6bd4\u5982\u4e00\u4e2a 10MB \u7684\u6587\u4ef6\u5207\u4e3a 10 \u4efd\uff0c\u6bcf\u4efd 1MB\u3002\u6bcf\u6b21\u4e0a\u4f20\u7684\u65f6\u5019\uff0c\u9700\u8981\u591a\u4e00\u4e2a\u53c2\u6570\u8bb0\u5f55\u5f53\u524d\u4e0a\u4f20\u7684\u6587\u4ef6\u5207\u7247\u7684\u8d77\u59cb\u4f4d\u7f6e\u3002<\/p>\n \u6bd4\u5982\u4e00\u4e2a 10MB \u7684\u6587\u4ef6\uff0c\u5207\u4e3a 10 \u4efd\uff0c\u6bcf\u4efd 1MB\uff0c\u90a3\u4e48\uff1a<\/p>\n \u628a\u8fd9\u4e2a\u641e\u61c2\uff0c\u540e\u9762\u7684\u4ee3\u7801\u5c31\u597d\u7406\u89e3\u4e86\u3002<\/p>\n \u540e\u7aef\u6bcf\u6b21\u5904\u7406\u7684\u65f6\u5019\uff0c\u9700\u8981\u5148\u8bbe\u7f6e\u6587\u4ef6\u7684\u8d77\u59cb\u4f4d\u7f6e\u3002<\/p>\n \u524d\u7aef\u9700\u8981\u5c06\u6587\u4ef6\u5207\u5206\u6210\u591a\u4e2a\u5c0f\u5757\uff0c\u7136\u540e\u4f9d\u6b21\u4e0a\u4f20\u3002<\/p>\n \u65ad\u70b9\u7eed\u4f20\u7684\u6280\u672f\u539f\u7406\u7c7b\u4f3c\u4e8e\u5206\u7247\u4e0a\u4f20\u3002<\/p>\n \u5f53\u6587\u4ef6\u5df2\u7ecf\u4e0a\u4f20\u4e86\u4e00\u90e8\u5206\u4e4b\u540e\uff0c\u65ad\u4e86\u9700\u8981\u91cd\u65b0\u5f00\u59cb\u4e0a\u4f20\u3002<\/p>\n \u90a3\u4e48\u6211\u4eec\u7684\u601d\u8def\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n \u5148\u6765\u770b\u540e\u7aef\u68c0\u67e5\u7684\u63a5\u53e3\uff0c\u5982\u4e0b\uff1a<\/p>\n \u5982\u679c\u6587\u4ef6\u5b58\u5728\uff0c\u5219\u8fd4\u56de\u5df2\u7ecf\u5b58\u5728\u7684\u6587\u4ef6\u5927\u5c0f\u3002<\/p>\n \u5982\u679c\u6587\u4ef6\u4e0d\u5b58\u5728\uff0c\u5219\u8fd4\u56de 0\uff0c\u8868\u793a\u524d\u7aef\u4ece\u5934\u5f00\u59cb\u4e0a\u4f20\u8be5\u6587\u4ef6\u3002<\/p>\n \u8fd9\u4e2a\u6848\u4f8b\u5b9e\u9645\u4e0a\u662f\u4e00\u4e2a\u65ad\u70b9\u7eed\u4f20+\u5206\u7247\u4e0a\u4f20\u7684\u6848\u4f8b\uff0c\u76f8\u5173\u77e5\u8bc6\u70b9\u5e76\u4e0d\u96be\uff0c\u5c0f\u4f19\u4f34\u4eec\u53ef\u4ee5\u81ea\u884c\u4f53\u4f1a\u4e0b\u3002<\/p>\n \u597d\u4e86\uff0c\u4ee5\u4e0a\u5c31\u662f\u5173\u4e8e\u6587\u4ef6\u4e0a\u4f20\u4e2d\u79d2\u4f20\u3001\u65ad\u70b9\u7eed\u4f20\u548c\u5206\u7247\u4e0a\u4f20\u7684\u5b9e\u6218\u5206\u4eab\u3002\u901a\u8fc7\u8fd9\u4e9b\u6280\u672f\u7684\u5e94\u7528\uff0c\u6211\u4eec\u53ef\u4ee5\u6781\u5927\u5730\u63d0\u5347\u6587\u4ef6\u4e0a\u4f20\u7684\u6548\u7387\u548c\u7a33\u5b9a\u6027\uff0c\u6539\u5584\u7528\u6237\u4f53\u9a8c\u3002\u5e0c\u671b\u5404\u4f4d\u5c0f\u4f19\u4f34\u5728\u81ea\u5df1\u7684\u9879\u76ee\u4e2d\u4e5f\u80fd\u7075\u6d3b\u8fd0\u7528\u8fd9\u4e9b\u6280\u5de7\uff0c\u89e3\u51b3\u5b9e\u9645\u95ee\u9898\u3002<\/p>\n \u672c\u6587\u5b8c\u6574\u6848\u4f8b\uff1ahttps:\/\/github.com\/lenve\/springboot3-samples\/tree\/main\/file_upload<\/a><\/p>\nMessageDigest<\/code> \u7c7b\u6765\u8ba1\u7b97\u6587\u4ef6\u7684 MD5 \u503c\uff0c\u7136\u540e\u68c0\u67e5\u6570\u636e\u5e93\u4e2d\u662f\u5426\u5b58\u5728\u8be5\u6587\u4ef6\u3002<\/p>\n@RestController\n@RequestMapping("\/file")\npublic class FileController {\n @Autowired\n FileService fileService;\n\n @PostMapping("\/upload1")\n public ResponseEntity<String> secondUpload(@RequestParam(value = "file",required = false) MultipartFile file,@RequestParam(required = false,value = "md5") String md5) {\n try {\n \/\/ \u68c0\u67e5\u6570\u636e\u5e93\u4e2d\u662f\u5426\u5df2\u5b58\u5728\u8be5\u6587\u4ef6\n if (fileService.existsByMd5(md5)) {\n return ResponseEntity.ok("\u6587\u4ef6\u5df2\u5b58\u5728");\n }\n \/\/ \u4fdd\u5b58\u6587\u4ef6\u5230\u670d\u52a1\u5668\n file.transferTo(new File("\/path\/to\/save\/" + file.getOriginalFilename()));\n \/\/ \u4fdd\u5b58\u6587\u4ef6\u4fe1\u606f\u5230\u6570\u636e\u5e93\n fileService.save(new FileInfo(file.getOriginalFilename(), DigestUtils.md5DigestAsHex(file.getInputStream())));\n return ResponseEntity.ok("\u4e0a\u4f20\u6210\u529f");\n } catch (Exception e) {\n return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body("\u4e0a\u4f20\u5931\u8d25");\n }\n }\n}<\/code><\/pre>\n\u524d\u7aef\u8c03\u7528<\/h3>\n
<!DOCTYPE html>\n<html lang="en">\n<head>\n <meta charset="UTF-8">\n <title>\u79d2\u4f20<\/title>\n <script src="spark-md5.js"><\/script>\n<\/head>\n<body>\n<input type="file" id="fileInput" \/>\n<button onclick="startUpload()">\u5f00\u59cb\u4e0a\u4f20<\/button>\n<hr>\n<script>\n async function startUpload() {\n const fileInput = document.getElementById('fileInput');\n const file = fileInput.files[0];\n if (!file) {\n alert("\u8bf7\u9009\u62e9\u6587\u4ef6");\n return;\n }\n\n const md5 = await calculateMd5(file);\n const formData = new FormData();\n formData.append('md5', md5);\n\n const response = await fetch('\/file\/upload1', {\n method: 'POST',\n body: formData\n });\n\n const result = await response.text();\n if (response.ok) {\n if (result != "\u6587\u4ef6\u5df2\u5b58\u5728") {\n \/\/ \u5f00\u59cb\u4e0a\u4f20\u6587\u4ef6\n }\n } else {\n console.error("\u4e0a\u4f20\u5931\u8d25: " + result);\n }\n }\n\n function calculateMd5(file) {\n return new Promise((resolve, reject) => {\n const reader = new FileReader();\n reader.onloadend = () => {\n const spark = new SparkMD5.ArrayBuffer();\n spark.append(reader.result);\n resolve(spark.end());\n };\n reader.onerror = () => reject(reader.error);\n reader.readAsArrayBuffer(file);\n });\n }\n<\/script>\n<\/body>\n<\/html><\/code><\/pre>\n\n
\u56db \u5206\u7247\u4e0a\u4f20\u5b9e\u6218<\/h2>\n
\n
1024*1024<\/code> \u4e2a\u5b57\u8282\u3002<\/li>\n1024*1024<\/code> \u5f00\u59cb\uff0c\u4e00\u5171\u662f 1024*1024<\/code> \u4e2a\u5b57\u8282\u3002<\/li>\n\u540e\u7aef\u5b9e\u73b0<\/h3>\n
private static final String UPLOAD_DIR = System.getProperty("user.home") + "\/uploads\/";\n\/**\n * \u4e0a\u4f20\u6587\u4ef6\u5230\u6307\u5b9a\u4f4d\u7f6e\n *\n * @param file \u4e0a\u4f20\u7684\u6587\u4ef6\n * @param start \u6587\u4ef6\u5f00\u59cb\u4e0a\u4f20\u7684\u4f4d\u7f6e\n * @return ResponseEntity<String> \u4e0a\u4f20\u7ed3\u679c\n *\/\n@PostMapping("\/upload2")\npublic ResponseEntity<String> resumeUpload(@RequestParam("file") MultipartFile file, @RequestParam("start") long start,@RequestParam("fileName") String fileName) {\n try {\n File directory = new File(UPLOAD_DIR);\n if (!directory.exists()) {\n directory.mkdirs();\n }\n File targetFile = new File(UPLOAD_DIR + fileName);\n RandomAccessFile randomAccessFile = new RandomAccessFile(targetFile, "rw");\n FileChannel channel = randomAccessFile.getChannel();\n channel.position(start);\n channel.transferFrom(file.getResource().readableChannel(), start, file.getSize());\n channel.close();\n randomAccessFile.close();\n return ResponseEntity.ok("\u4e0a\u4f20\u6210\u529f");\n } catch (Exception e) {\n System.out.println("\u4e0a\u4f20\u5931\u8d25: "+e.getMessage());\n return ResponseEntity.status(500).body("\u4e0a\u4f20\u5931\u8d25");\n }\n}<\/code><\/pre>\n\u524d\u7aef\u8c03\u7528<\/h3>\n
<!DOCTYPE html>\n<html lang="en">\n<head>\n <meta charset="UTF-8">\n <meta name="viewport" content="width=device-width, initial-scale=1.0">\n <title>\u5206\u7247\u793a\u4f8b<\/title>\n<\/head>\n<body>\n <input type="file" id="fileInput" \/>\n <button onclick="startUpload()">\u5f00\u59cb\u4e0a\u4f20<\/button>\n\n <script>\n async function startUpload() {\n const fileInput = document.getElementById('fileInput');\n const file = fileInput.files[0];\n if (!file) {\n alert("\u8bf7\u9009\u62e9\u6587\u4ef6");\n return;\n }\n\n const filename = file.name;\n let start = 0;\n\n uploadFile(file, start);\n }\n\n async function uploadFile(file, start) {\n const chunkSize = 1024 * 1024; \/\/ \u6bcf\u4e2a\u5206\u72471MB\n const total = Math.ceil(file.size \/ chunkSize);\n\n for (let i = 0; i < total; i++) {\n const chunkStart = start + i * chunkSize;\n const chunkEnd = Math.min(chunkStart + chunkSize, file.size);\n const chunk = file.slice(chunkStart, chunkEnd);\n\n const formData = new FormData();\n formData.append('file', chunk);\n formData.append('start', chunkStart);\n formData.append('fileName', file.name);\n\n const response = await fetch('\/file\/upload2', {\n method: 'POST',\n body: formData\n });\n\n const result = await response.text();\n if (response.ok) {\n console.log(`\u5206\u7247 ${i + 1}\/${total} \u4e0a\u4f20\u6210\u529f`);\n } else {\n console.error(`\u5206\u7247 ${i + 1}\/${total} \u4e0a\u4f20\u5931\u8d25: ${result}`);\n break;\n }\n }\n }\n <\/script>\n<\/body>\n<\/html><\/code><\/pre>\n\u4e94 \u65ad\u70b9\u7eed\u4f20\u5b9e\u6218<\/h2>\n
\n
\u540e\u7aef\u6848\u4f8b<\/h3>\n
@GetMapping("\/check")\npublic ResponseEntity<Long> checkFile(@RequestParam("filename") String filename) {\n File file = new File(UPLOAD_DIR + filename);\n if (file.exists()) {\n return ResponseEntity.ok(file.length());\n } else {\n return ResponseEntity.ok(0L);\n }\n}<\/code><\/pre>\n\u524d\u7aef\u8c03\u7528<\/h3>\n
<!DOCTYPE html>\n<html lang="en">\n<head>\n <meta charset="UTF-8">\n <meta name="viewport" content="width=device-width, initial-scale=1.0">\n <title>\u65ad\u70b9\u7eed\u4f20\u793a\u4f8b<\/title>\n<\/head>\n<body>\n<input type="file" id="fileInput"\/>\n<button onclick="startUpload()">\u5f00\u59cb\u4e0a\u4f20<\/button>\n\n<script>\n async function startUpload() {\n const fileInput = document.getElementById('fileInput');\n const file = fileInput.files[0];\n if (!file) {\n alert("\u8bf7\u9009\u62e9\u6587\u4ef6");\n return;\n }\n\n const filename = file.name;\n let start = await checkFile(filename);\n\n uploadFile(file, start);\n }\n\n async function checkFile(filename) {\n const response = await fetch(`\/file\/check?filename=${filename}`);\n const start = await response.json();\n return start;\n }\n\n async function uploadFile(file, start) {\n const chunkSize = 1024 * 1024; \/\/ \u6bcf\u4e2a\u5206\u72471MB\n const total = Math.ceil((file.size - start) \/ chunkSize);\n\n for (let i = 0; i < total; i++) {\n const chunkStart = start + i * chunkSize;\n const chunkEnd = Math.min(chunkStart + chunkSize, file.size);\n const chunk = file.slice(chunkStart, chunkEnd);\n\n const formData = new FormData();\n formData.append('file', chunk);\n formData.append('start', chunkStart);\n formData.append('fileName', file.name);\n\n const response = await fetch('\/file\/upload2', {\n method: 'POST',\n body: formData\n });\n\n const result = await response.text();\n if (response.ok) {\n console.log(`\u5206\u7247 ${i + 1}\/${total} \u4e0a\u4f20\u6210\u529f`);\n } else {\n console.error(`\u5206\u7247 ${i + 1}\/${total} \u4e0a\u4f20\u5931\u8d25: ${result}`);\n break;\n }\n }\n }\n<\/script>\n<\/body>\n<\/html><\/code><\/pre>\n\u516d \u603b\u7ed3<\/h2>\n