{"id":40404,"date":"2023-06-24T02:44:04","date_gmt":"2023-11-13T11:33:39","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%b8%8a%e4%bc%a0spring-mvc%e6%96%87%e4%bb%b6\/"},"modified":"2024-04-30T10:25:00","modified_gmt":"2024-04-30T02:25:00","slug":"%e4%b8%8a%e4%bc%a0spring-mvc%e6%96%87%e4%bb%b6","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%b8%8a%e4%bc%a0spring-mvc%e6%96%87%e4%bb%b6\/","title":{"rendered":"\u4e0a\u4f20Spring MVC\u6587\u4ef6"},"content":{"rendered":"

\u4f7f\u7528Spring MVC\uff0c\u53ef\u4ee5\u8f7b\u677e\u63a5\u6536\u4eceWeb\u6d4f\u89c8\u5668\u4e0a\u4f20\u7684\u6587\u4ef6\u3002\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u5c06\u4ece\u57fa\u672c\u7684\u5b9e\u73b0\u65b9\u6cd5\u5f00\u59cb\uff0c\u8be6\u7ec6\u4ecb\u7ecd\u6587\u4ef6\u4e0a\u4f20\u7684\u6df1\u5ea6\u65b9\u6cd5\u3002<\/p>\n

\u57fa\u672c\u7684\u5b9e\u65bd\u65b9\u6cd5<\/h1>\n

\u6211\u5011\u5c07\u5275\u5efa\u4e00\u500b\u4e0a\u50b3\u6587\u4ef6\u7684\u754c\u9762\u3002\u5728\u9019\u88e1\uff0c\u6211\u5011\u5c07\u4f7f\u7528Thymeleaf\u4f5c\u70ba\u6a21\u677f\u5f15\u64ce\u3002
\n\u9019\u662f\u4e00\u500b\u50c5\u5305\u542b\u9078\u64c7\u4e0a\u50b3\u6587\u4ef6\u7684\u5b57\u6bb5\u548c\u4e0a\u50b3\u6309\u9215\u7684\u7c21\u55ae\u754c\u9762\u3002<\/p>\n

<!DOCTYPE html><\/span>\r\n<html<\/span> xmlns=<\/span>\"http:\/\/www.w3.org\/1999\/xhtml\"<\/span> xmlns:th=<\/span>\"http:\/\/www.thymeleaf.org\"<\/span>><\/span>\r\n<head><\/span>\r\n<meta<\/span> charset=<\/span>\"UTF-8\"<\/span>><\/span>\r\n<title><\/span>File Upload<\/title><\/span>\r\n<\/head><\/span>\r\n<body><\/span>\r\n    <form<\/span> action=<\/span>\"\/sample\/upload\"<\/span> th:action=<\/span>\"@{\/sample\/upload}\"<\/span> method=<\/span>\"post\"<\/span> enctype=<\/span>\"multipart\/form-data\"<\/span>><\/span>\r\n        <input<\/span> type=<\/span>\"file\"<\/span> name=<\/span>\"upload_file\"<\/span> \/><br<\/span> \/><\/span>\r\n        <button<\/span> type=<\/span>\"submit\"<\/span>><\/span>upload<\/button><\/span>\r\n    <\/form><\/span>\r\n<\/body><\/span>\r\n<\/html><\/span>\r\n<\/code><\/pre>\n
\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u521b\u5efa\u4e00\u4e2a\u63a7\u5236\u5668\u65b9\u6cd5\uff0c\u7528\u4e8e\u5904\u7406\u7528\u6237\u70b9\u51fb\u4e0a\u4f20\u6309\u94ae\u540e\u7684\u63d0\u4ea4\u64cd\u4f5c\u3002<\/p>\n
@PostMapping<\/span>(<\/span>\"upload\"<\/span>)<\/span>\r\npublic<\/span> String<\/span> upload<\/span>(<\/span>@RequestParam<\/span>(<\/span>\"upload_file\"<\/span>)<\/span> MultipartFile<\/span> multipartFile<\/span>,<\/span> Model<\/span> model<\/span>)<\/span> {<\/span>\r\n    model<\/span>.<\/span>addAttribute<\/span>(<\/span>\"originalFilename\"<\/span>,<\/span> multipartFile<\/span>.<\/span>getOriginalFilename<\/span>());<\/span>\r\n\r\n    return<\/span> \"sample\/result\"<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5728\u63a7\u5236\u5668\u7684\u53c2\u6570\u4e2d\u6dfb\u52a0MultipartFile\uff0c\u5e76\u4f7f\u7528@RequestParam\u6ce8\u91ca\u6307\u5b9a\u8be5\u53c2\u6570\u3002\u8fd9\u4e2a@RequestParam\u6ce8\u91ca\u7684value\u5c5e\u6027\u7528\u4e8e\u6307\u5b9a\u8981\u9009\u62e9\u4e0a\u4f20\u6587\u4ef6\u7684\u5b57\u6bb5\u7684name\u5c5e\u6027\u7684\u503c\uff0c\u8fd9\u662f\u5173\u952e\u6240\u5728\u3002<\/p>\n
<input<\/span> type=<\/span>\"file\"<\/span> name=<\/span>\"upload_file\"<\/span> \/><\/span>\r\n<\/code><\/pre>\n
public<\/span> String<\/span> upload<\/span>(<\/span>@RequestParam<\/span>(<\/span>\"upload_file\"<\/span>)<\/span> MultipartFile<\/span> multipartFile<\/span>,<\/span> ...)<\/span> {<\/span>\r\n<\/code><\/pre>\n
\u4e0e\u9009\u62e9\u6587\u4ef6\u7684\u5b57\u6bb5\u8fdb\u884c\u6620\u5c04<\/h2>\n
\u5148\u524d\u7684\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u4f7f\u7528\u4e86@RequestParam\u8a3b\u89e3\u4f86\u5c07\u756b\u9762\u4e0a\u9078\u64c7\u6a94\u6848\u7684\u6b04\u4f4d\u7684name\u5c6c\u6027\u8207\u63a7\u5236\u5668\u7684\u5f15\u6578MultipartFile\u9032\u884c\u6620\u5c04\u3002\u4f46\u662f\u6211\u5011\u9084\u53ef\u4ee5\u66f4\u7c21\u55ae\u5730\u9032\u884c\u6620\u5c04\u3002\u53ea\u9700\u8b93\u756b\u9762\u4e0a\u9078\u64c7\u6a94\u6848\u7684\u6b04\u4f4d\u7684name\u5c6c\u6027\u548c\u63a7\u5236\u5668\u7684\u5f15\u6578MultipartFile\u7684\u8b8a\u6578\u540d\u7a31\u76f8\u540c\uff0c\u5c31\u53ef\u4ee5\u81ea\u52d5\u9032\u884c\u6620\u5c04\uff0c\u800c\u7121\u9700\u4f7f\u7528@RequestParam\u8a3b\u89e3\u3002<\/p>\n
<input<\/span> type=<\/span>\"file\"<\/span> name=<\/span>\"multipartFile\"<\/span> \/><\/span>\r\n<\/code><\/pre>\n
public<\/span> String<\/span> upload<\/span>(<\/span>MultipartFile<\/span> multipartFile<\/span>,<\/span> ...)<\/span> {<\/span>\r\n<\/code><\/pre>\n
\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u63a7\u5236\u5668\u7684\u5b9e\u73b0\u53d8\u5f97\u7b80\u5355\u4e86\u3002<\/p>\n
\u5bf9\u8868\u5355\u7684\u7ed1\u5b9a<\/h2>\n
\u901a\u5e38\u7684\u8f93\u5165\u5b57\u6bb5\u548c\u9009\u62e9\u6587\u4ef6\u7684\u5b57\u6bb5\u4e00\u6837\uff0c\u4e5f\u53ef\u4ee5\u7ed1\u5b9a\u5230\u8868\u5355\u7684\u6210\u5458\u53d8\u91cf\u4e0a\u3002<\/p>\n
\u9996\u5148\uff0c\u521b\u5efa\u4e00\u4e2aForm\u7c7b\u3002\u4f7f\u7528lombok\u6765\u7701\u7565\u8bbf\u95ee\u65b9\u6cd5\u7684\u5b9e\u73b0\u3002<\/p>\n
@Getter<\/span>\r\n@Setter<\/span>\r\npublic<\/span> class<\/span> UploadForm<\/span> {<\/span>\r\n    private<\/span> MultipartFile<\/span> multipartFile<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u4e3a\u4e86\u5c06\u9009\u62e9\u56fe\u50cf\u6587\u4ef6\u7684\u5b57\u6bb5\u4e0eForm\u7c7b\u7684\u6210\u5458\u53d8\u91cf\u8fdb\u884c\u6620\u5c04\uff0c\u6211\u4eec\u9700\u8981\u5bf9\u5176\u8fdb\u884c\u5c11\u91cf\u4fee\u6539\u3002<\/p>\n
<!DOCTYPE html><\/span>\r\n<html<\/span> xmlns=<\/span>\"http:\/\/www.w3.org\/1999\/xhtml\"<\/span> xmlns:th=<\/span>\"http:\/\/www.thymeleaf.org\"<\/span>><\/span>\r\n<head><\/span>\r\n<meta<\/span> charset=<\/span>\"UTF-8\"<\/span>><\/span>\r\n<title><\/span>File Upload<\/title><\/span>\r\n<\/head><\/span>\r\n<body><\/span>\r\n    <form<\/span> action=<\/span>\"\/sample\/upload\"<\/span> th:action=<\/span>\"@{\/sample\/upload}\"<\/span> method=<\/span>\"post\"<\/span> enctype=<\/span>\"multipart\/form-data\"<\/span> th:object=<\/span>\"${uploadForm}\"<\/span>><\/span>\r\n        <input<\/span> type=<\/span>\"file\"<\/span> th:field=<\/span>\"*{multipartFile}\"<\/span> \/><br<\/span> \/><\/span>\r\n        <button<\/span> type=<\/span>\"submit\"<\/span>><\/span>upload<\/button><\/span>\r\n    <\/form><\/span>\r\n<\/body><\/span>\r\n<\/html><\/span>\r\n<\/code><\/pre>\n
\u53ea\u9700\u5c06\u63a7\u5236\u5668\u7684Form\u7c7b\u4f5c\u4e3a\u53c2\u6570\uff0c\u5373\u53ef\u63a5\u6536\u4e0a\u4f20\u7684\u6587\u4ef6\u3002<\/p>\n
@PostMapping<\/span>(<\/span>\"upload\"<\/span>)<\/span>\r\npublic<\/span> String<\/span> upload<\/span>(<\/span>UploadForm<\/span> uploadForm<\/span>,<\/span> Model<\/span> model<\/span>)<\/span> {<\/span>\r\n    model<\/span>.<\/span>addAttribute<\/span>(<\/span>\"originalFilename\"<\/span>,<\/span> uploadForm<\/span>.<\/span>getMultipartFile<\/span>()<\/span>\r\n            .<\/span>getOriginalFilename<\/span>());<\/span>\r\n\r\n    return<\/span> \"sample\/result\"<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u4e0a\u4f20\u6587\u4ef6\u7684\u9a8c\u8bc1<\/h1>\n
\u548c\u5e38\u89c4\u7684\u8f93\u5165\u5b57\u6bb5\u4e00\u6837\uff0c\u4e0a\u4f20\u7684\u6587\u4ef6\u901a\u5e38\u4e5f\u9700\u8981\u8fdb\u884c\u9a8c\u8bc1\u3002
\n\u60a8\u53ef\u4ee5\u5728\u63a7\u5236\u5668\u5185\u5b9e\u73b0\u5bf9\u63a5\u6536\u5230\u7684MultipartFile\u5bf9\u8c61\u8fdb\u884c\u9a8c\u8bc1\uff0c\u4f46\u662f\u5c06\u9a8c\u8bc1\u8fc7\u7a0b\u548c\u5e38\u89c4\u5904\u7406\u5206\u5f00\u4f1a\u4f7f\u6e90\u4ee3\u7801\u66f4\u6613\u8bfb\u3002<\/p>\n
\u901a\u8fc7Bean Validation\u8fdb\u884c\u9a8c\u8bc1\u3002<\/h2>\n
\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3aForm\u7c7b\u7684\u6210\u5458\u53d8\u91cf\u6307\u5b9a\u6ce8\u89e3\u6765\u5b9e\u73b0\u4e0a\u4f20\u6587\u4ef6\u7684\u9a8c\u8bc1\uff0c\u8fd9\u662f\u901a\u8fc7Bean Validation\u5b9e\u73b0\u7684\u3002\u7136\u800c\uff0cBean Validation\u5e76\u6ca1\u6709\u63d0\u4f9b\u4e0a\u4f20\u6587\u4ef6\u7684\u9a8c\u8bc1\u529f\u80fd\u3002<\/p>\n
\u7531\u4e8eBean Validation\u662f\u5728JSR\uff08\u5373Java\u89c4\u8303\u8981\u6c42\uff09\u4e2d\u5b9a\u4e49\u7684\uff0c\u56e0\u6b64\u5b83\u65e0\u6cd5\u4e0eSpring Framework\u7684\u72ec\u7279\u89c4\u8303MultipartFile\u5bf9\u6587\u4ef6\u4e0a\u4f20\u8fdb\u884c\u517c\u5bb9\uff0c\u8fd9\u662f\u53ef\u4ee5\u7406\u89e3\u7684\u3002<\/p><\/blockquote>\n
\u5728Bean Validation\u4e2d\uff0c\u63d0\u4f9b\u4e86\u5f00\u53d1\u4eba\u5458\u5b9e\u73b0\u81ea\u5b9a\u4e49\u9a8c\u8bc1\u7684\u65b9\u6cd5\uff0c\u56e0\u6b64\u6211\u4eec\u53ef\u4ee5\u5229\u7528\u8fd9\u4e2a\u673a\u5236\u6765\u521b\u5efa\u9002\u7528\u4e8e\u4e0a\u4f20\u6587\u4ef6\u7684\u9a8c\u8bc1\u3002<\/p>\n
\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u5c06\u521b\u5efa\u4e00\u4e2a@FileRequired\u6ce8\u89e3\uff0c\u8be5\u6ce8\u89e3\u5fc5\u987b\u6307\u5b9a\u6587\u4ef6\u3002<\/p>\n
@Target<\/span>({<\/span>ElementType<\/span>.<\/span>METHOD<\/span>,<\/span> ElementType<\/span>.<\/span>FIELD<\/span>,<\/span> ElementType<\/span>.<\/span>ANNOTATION_TYPE<\/span>})<\/span>\r\n@Retention<\/span>(<\/span>RetentionPolicy<\/span>.<\/span>RUNTIME<\/span>)<\/span>\r\n@Constraint<\/span>(<\/span>validatedBy<\/span> =<\/span> FileRequiredValidator<\/span>.<\/span>class<\/span>)<\/span>\r\npublic<\/span> @interface<\/span> FileRequired<\/span> {<\/span>\r\n    String<\/span> message<\/span>()<\/span> default<\/span> \"{com.example.demo.validation.FileRequired.message}\"<\/span>;<\/span>\r\n\r\n    Class<\/span><?>[]<\/span> groups<\/span>()<\/span> default<\/span> {};<\/span>\r\n\r\n    Class<\/span><?<\/span> extends<\/span> Payload<\/span>>[]<\/span> payload<\/span>()<\/span> default<\/span> {};<\/span>\r\n\r\n    @Target<\/span>({<\/span>ElementType<\/span>.<\/span>METHOD<\/span>,<\/span> ElementType<\/span>.<\/span>FIELD<\/span>,<\/span> ElementType<\/span>.<\/span>ANNOTATION_TYPE<\/span>})<\/span>\r\n    @Retention<\/span>(<\/span>RetentionPolicy<\/span>.<\/span>RUNTIME<\/span>)<\/span>\r\n    @Documented<\/span>\r\n    @interface<\/span> List<\/span> {<\/span>\r\n        FileRequired<\/span>[]<\/span> value<\/span>();<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u63a5\u4e0b\u6765\uff0c\u521b\u5efa\u4e0e\u6ce8\u91ca\u76f8\u5bf9\u5e94\u7684\u9a8c\u8bc1\u5668\u7c7b\u3002\u9a8c\u8bc1\u5904\u7406\u672c\u8eab\u5c06\u5728\u8be5\u7c7b\u4e2d\u5b9e\u73b0\u3002
\n\u5982\u679c\u672a\u6307\u5b9a\u4e0a\u4f20\u6587\u4ef6\uff0c\u5219\u901a\u8fc7MultipartFile\u5bf9\u8c61\u7684getOriginalFilename()\u65b9\u6cd5\u8fd4\u56de\u7684\u6587\u4ef6\u540d\u5c06\u4e3a\u7a7a\u5b57\u7b26\u4e32(“”)\uff0c\u56e0\u6b64\u5c06\u4f7f\u7528\u8be5\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u8fdb\u884c\u9a8c\u8bc1\u3002<\/p>\n
public<\/span> class<\/span> FileRequiredValidator<\/span> implements<\/span> ConstraintValidator<\/span><<\/span>FileRequired<\/span>,<\/span> MultipartFile<\/span>><\/span> {<\/span>\r\n    @Override<\/span>\r\n    public<\/span> void<\/span> initialize<\/span>(<\/span>FileRequired<\/span> constraint<\/span>)<\/span> {}<\/span>\r\n\r\n    @Override<\/span>\r\n    public<\/span> boolean<\/span> isValid<\/span>(<\/span>MultipartFile<\/span> multipartFile<\/span>,<\/span> ConstraintValidatorContext<\/span> context<\/span>)<\/span> {<\/span>\r\n        return<\/span> multipartFile<\/span> !=<\/span> null<\/span>\r\n                &&<\/span> !<\/span>multipartFile<\/span>.<\/span>getOriginalFilename<\/span>().<\/span>isEmpty<\/span>();<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5230\u76ee\u524d\u4e3a\u6b62\uff0c\u81ea\u5b9a\u4e49\u9a8c\u8bc1\u7684\u5b9e\u73b0\u5df2\u7ecf\u5b8c\u6210\u4e86\u3002\u5269\u4e0b\u7684\u5c31\u662f\u901a\u8fc7\u6b63\u5e38\u7684Bean Validation\u5b9e\u73b0\u65b9\u5f0f\uff0c\u53ef\u4ee5\u5bf9\u4e0a\u4f20\u6587\u4ef6\u8fdb\u884c\u9a8c\u8bc1\u3002
\n\u5177\u4f53\u6765\u8bf4\uff0c\u60a8\u9700\u8981\u4e3a\u8868\u5355\u7684\u6210\u5458\u53d8\u91cf\u6307\u5b9a\u9a8c\u8bc1\u7684\u6ce8\u89e3\u3002<\/p>\n
@FileRequired<\/span>\r\nprivate<\/span> MultipartFile<\/span> multipartFile<\/span>;<\/span>\r\n<\/code><\/pre>\n
\u63a5\u4e0b\u6765\uff0c\u5728\u63a7\u5236\u5668\u7684Form\u53c2\u6570\u4e0a\u6807\u6ce8@Validated\u6ce8\u89e3\uff0c\u5e76\u6dfb\u52a0BindingResult\u53c2\u6570\uff0c\u540c\u65f6\u6dfb\u52a0\u5bf9\u9a8c\u8bc1\u9519\u8bef\u7684\u5904\u7406\u3002<\/p>\n
@PostMapping<\/span>(<\/span>\"upload\"<\/span>)<\/span>\r\npublic<\/span> String<\/span> upload<\/span>(<\/span>@Valid<\/span> UploadForm<\/span> uploadForm<\/span>,<\/span> BindingResult<\/span> result<\/span>,<\/span> Model<\/span> model<\/span>)<\/span> {<\/span>\r\n    if<\/span> (<\/span>result<\/span>.<\/span>hasErrors<\/span>())<\/span> {<\/span>\r\n        return<\/span> \"sample\/upload\"<\/span>;<\/span>\r\n    }<\/span>\r\n<\/code><\/pre>\n
\u901a\u8fc7\u4f7f\u7528\u4e0e\u666e\u901a\u7684Bean Validation\u76f8\u540c\u7684\u5b9e\u73b0\uff0c\u53ef\u4ee5\u9a8c\u8bc1\u4e0a\u4f20\u6587\u4ef6\u3002
\n\u51c6\u5907\u597dBean Validation\u53ef\u4ee5\u51cf\u5c11\u5e38\u89c1\u7684\u4e0a\u4f20\u6587\u4ef6\u9a8c\u8bc1\u7684\u5b9e\u73b0\u6210\u672c\u3002
\n\u4f8b\u5982\uff0c\u4ee5\u4e0b\u8fd9\u79cdBean Validation\u770b\u8d77\u6765\u5177\u6709\u8f83\u9ad8\u7684\u53ef\u91cd\u7528\u6027\u3002<\/p>\n
    \n
  • \n
      \u30d5\u30a1\u30a4\u30eb\u306e\u6307\u5b9a\u5fc5\u9808\u3002<\/ul>\n<\/li>\n<\/ul>\n
       <\/p>\n
        \n
      • \n
          \u30d5\u30a1\u30a4\u30eb\u304c\u7a7a(0\u30d0\u30a4\u30c8)\u3067\u306a\u3044\u3002<\/ul>\n<\/li>\n<\/ul>\n
           <\/p>\n
            \u30d5\u30a1\u30a4\u30eb\u306e\u7a2e\u985e\u304c\u7279\u5b9a\u306e\u3082\u306e\u3067\u3042\u308b\u3002<\/ul>\n
            \u4f7f\u7528Spring Validator\u8fdb\u884c\u9a8c\u8bc1<\/h2>\n
            \u4f7f\u7528Bean Validation\u548cSpring\u9a8c\u8bc1\u7a0b\u5e8f\uff0c\u5df2\u4e3aForm\u7c7b\u7684\u6bcf\u4e2a\u6210\u5458\u53d8\u91cf\u6dfb\u52a0\u4e86\u53ef\u91cd\u7528\u7684\u901a\u7528\u9a8c\u8bc1\u3002\u76f8\u6bd4\u4e4b\u4e0b\uff0cSpring\u9a8c\u8bc1\u7a0b\u5e8f\u901a\u8fc7\u8868\u5355\u6765\u5b9e\u73b0\u9a8c\u8bc1\u3002<\/p>\n
            \u5728\u6b64\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5c06\u4f7f\u7528Spring\u9a8c\u8bc1\u7a0b\u5e8f\u6765\u5b9e\u73b0\u4e0a\u4f20\u6587\u4ef6\u7684\u9a8c\u8bc1\u3002<\/p>\n
            \u6211\u4eec\u5c06\u5b9e\u73b0\u5177\u6709org.springframework.validation.Validator\u63a5\u53e3\u7684\u7c7b\u7684\u9a8c\u8bc1\u5904\u7406\u3002<\/p>\n
            @Component<\/span>\r\npublic<\/span> class<\/span> MultipartFileValidator<\/span> implements<\/span> Validator<\/span> {<\/span>\r\n    @Override<\/span>\r\n    public<\/span> boolean<\/span> supports<\/span>(<\/span>Class<\/span><?><\/span> clazz<\/span>)<\/span> {<\/span>\r\n        return<\/span> UploadForm<\/span>.<\/span>class<\/span>.<\/span>isAssignableFrom<\/span>(<\/span>clazz<\/span>);<\/span>\r\n    }<\/span>\r\n\r\n    @Override<\/span>\r\n    public<\/span> void<\/span> validate<\/span>(<\/span>Object<\/span> target<\/span>,<\/span> Errors<\/span> errors<\/span>)<\/span> {<\/span>\r\n        UploadForm<\/span> uploadForm<\/span> =<\/span> (<\/span>UploadForm<\/span>)<\/span> target<\/span>;<\/span>\r\n        if<\/span> (<\/span>uploadForm<\/span>.<\/span>getMultipartFile<\/span>().<\/span>getOriginalFilename<\/span>().<\/span>isEmpty<\/span>())<\/span> {<\/span>\r\n            errors<\/span>.<\/span>rejectValue<\/span>(<\/span>\"multipartFile\"<\/span>,<\/span> \"com.example.demo.validation.FileLinesLarge.message\"<\/span>);<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
            \u53ea\u9700\u8fd9\u6837\uff0cSpring Validator\u7684\u5b9e\u73b0\u5c31\u5b8c\u6210\u4e86\u3002\u63a5\u4e0b\u6765\uff0c\u60a8\u53ea\u9700\u5728\u63a7\u5236\u5668\u7c7b\u4e2d\u8bbe\u7f6e\u4f7f\u7528Spring Validator\u6765\u9a8c\u8bc1\u8868\u5355\u5373\u53ef\u3002<\/p>\n
            @Autowired<\/span>\r\nprivate<\/span> MultipartFileValidator<\/span> multipartFileValidator<\/span>;<\/span>\r\n\r\n@InitBinder<\/span>\r\nprivate<\/span> void<\/span> initBinderFileBucket<\/span>(<\/span>WebDataBinder<\/span> binder<\/span>)<\/span> {<\/span>\r\n    binder<\/span>.<\/span>setValidator<\/span>(<\/span>multipartFileValidator<\/span>);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
            \u5728\u4e2d\u56fd\uff0c\u63a7\u5236\u5668\u65b9\u6cd5\u7684\u66f4\u6539\u4e0eBean Validator\u76f8\u4f3c\u3002<\/p>\n
            @PostMapping<\/span>(<\/span>\"upload\"<\/span>)<\/span>\r\npublic<\/span> String<\/span> upload<\/span>(<\/span>@Valid<\/span> UploadForm<\/span> uploadForm<\/span>,<\/span> BindingResult<\/span> result<\/span>,<\/span> Model<\/span> model<\/span>)<\/span> {<\/span>\r\n    if<\/span> (<\/span>result<\/span>.<\/span>hasErrors<\/span>())<\/span> {<\/span>\r\n        return<\/span> \"sample\/upload\"<\/span>;<\/span>\r\n    }<\/span>\r\n<\/code><\/pre>\n
            \u6587\u4ef6\u4e0a\u8f7d\u8bbe\u7f6e<\/h1>\n
            \u5728Spring\u4e2d\uff0c\u6709\u4e00\u4e9b\u4e0e\u6587\u4ef6\u4e0a\u4f20\u76f8\u5173\u7684\u914d\u7f6e\u9879\u3002\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u5c06\u89e3\u91ca\u5982\u4f55\u4f7f\u7528Spring Boot\u8fdb\u884c\u6587\u4ef6\u4e0a\u4f20\u7684\u914d\u7f6e\u3002<\/p>\n
            spring.servlet.multipart.max-file-size\u7684\u4e2d\u6587\u542b\u4e49\u662f\u6307\u4e0a\u4f20\u6587\u4ef6\u7684\u6700\u5927\u5927\u5c0f\u9650\u5236\u3002<\/h2>\n
            \u8bf7\u6307\u5b9a\u6bcf\u4e2a\u4e0a\u4f20\u6587\u4ef6\u7684\u6700\u5927\u5927\u5c0f\u3002\u9ed8\u8ba4\u4e3a\u201c1MB\u201d\u3002\u60a8\u53ef\u4ee5\u5728\u6570\u5b57\u4e4b\u540e\u6dfb\u52a0\u5355\u4f4d\u201cMB\u201d\u6216\u201cKB\u201d\u6765\u6307\u5b9a\u6700\u5927\u5927\u5c0f\u3002<\/p>\n
            \u8bf7\u6ce8\u610f\uff0c\u8fd9\u662f\u5355\u4e2a\u6587\u4ef6\u7684\u6700\u5927\u5927\u5c0f\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6307\u5b9a\u4e3a\u201c1MB\u201d\uff0c\u5219\u53ef\u4ee5\u4e0a\u4f2010\u4e2a\u201c1MB\u201d\u6587\u4ef6\uff0c\u4f46\u4e0d\u80fd\u4e0a\u4f20\u4e00\u4e2a\u201c10MB\u201d\u6587\u4ef6\u3002<\/p>\n
            spring.servlet.multipart.max-file-size<\/span>=<\/span>50MB<\/span>\r\n<\/code><\/pre>\n
            \u8fd9\u4e2a\u5c5e\u6027\u7684\u952e\u540d\u5df2\u7ecf\u5728Spring Boot 2.0.0\u4e2d\u88ab\u6539\u53d8\u4e86\u3002\u5982\u679c\u4f7f\u7528\u7684\u662fSpring Boot 2.0.0\u4e4b\u524d\u7684\u7248\u672c\uff0c\u5219\u9700\u8981\u4f7f\u7528\u4e4b\u524d\u7684\u952e\u540d”spring.http.multipart.max-file-size”\u3002<\/p><\/blockquote>\n
            spring.servlet.multipart.max-request-size \u53ef\u4ee5\u7ffb\u8bd1\u4e3a “\u6625\u5b63.\u670d\u52a1\u5668.\u591a\u90e8\u5206.\u6700\u5927\u8bf7\u6c42\u5927\u5c0f”<\/h2>\n
            \u8bbe\u7f6e\u6574\u4e2aMultipart\u8bf7\u6c42\u7684\u6700\u5927\u5927\u5c0f\u3002\u9ed8\u8ba4\u4e3a”10MB”\u3002\u5728\u6570\u5b57\u540e\u9762\u52a0\u4e0a\u5355\u4f4d”MB”\u6216”KB”\u6765\u6307\u5b9a\u6700\u5927\u5927\u5c0f\u3002
            \n\u8bf7\u6ce8\u610f\uff0c\u8fd9\u4e2a”\u6700\u5927\u5927\u5c0f”\u662f\u6307\u4e0a\u4f20\u6587\u4ef6\u4ee5\u53ca\u5176\u4ed6\u8f93\u5165\u9879\u76ee\u7b49\u53d1\u9001\u5230\u670d\u52a1\u5668\u7684\u6240\u6709\u6570\u636e\u7684\u603b”\u6700\u5927\u5927\u5c0f”\u3002<\/p>\n
            spring.servlet.multipart.max-request-size<\/span>=<\/span>100MB<\/span>\r\n<\/code><\/pre>\n
            \u8fd9\u4e2a\u5c5e\u6027\u7684\u952e\u540d\u5728Spring Boot 2.0.0\u4e2d\u5df2\u7ecf\u88ab\u66f4\u6539\u3002\u5982\u679c\u4f7f\u7528\u7684\u662fSpring Boot 2.0.0\u4e4b\u524d\u7684\u7248\u672c\uff0c\u9700\u8981\u4f7f\u7528\u5148\u524d\u7684\u952e\u540d”spring.http.multipart.max-request-size”\u3002<\/p><\/blockquote>\n
            spring.servlet.multipart.enabled \u7684\u4e2d\u6587\u89e3\u91ca\u4e3a\uff1a\u542f\u7528 Spring \u7684\u6587\u4ef6\u4e0a\u4f20\u529f\u80fd\u3002<\/h2>\n
            \u6307\u5b9a\u662f\u5426\u5f00\u542fSpring\u7684\u9ed8\u8ba4\u5b9e\u73b0MultipartResolver\u6765\u5904\u7406Multipart\u8bf7\u6c42\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cMultipartResolver\u662f\u542f\u7528\u7684\uff0c\u503c\u4e3atrue\u3002
            \nMultipart\u6587\u4ef6\u4e0a\u4f20\u7684\u63a5\u53e3\u662f\u7531RFC 1867\u5b9a\u4e49\u7684\uff0c\u5e76\u4e14\u53ef\u4ee5\u8f7b\u677e\u8fdb\u884c\u4ea4\u6362\u3002\u5982\u679c\u8981\u4f7f\u7528\u9664\u4e86Spring\u9ed8\u8ba4\u5b9e\u73b0MultipartResolver\u4ee5\u5916\u7684\u5176\u4ed6\u5b9e\u73b0\uff0c\u5c06\u6b64\u5c5e\u6027\u8bbe\u7f6e\u4e3afalse\u3002<\/p>\n
            spring.servlet.multipart.enabled<\/span>=<\/span>false<\/span>\r\n<\/code><\/pre>\n
            \u8fd9\u4e2a\u5c5e\u6027\u7684\u952e\u540d\u5728Spring Boot 2.0.0\u7248\u672c\u4e2d\u5df2\u7ecf\u88ab\u4fee\u6539\u3002\u5982\u679c\u4f7f\u7528\u7684\u662fSpring Boot 2.0.0\u4e4b\u524d\u7684\u7248\u672c\uff0c\u5219\u9700\u8981\u4f7f\u7528\u4ee5\u524d\u7684\u952e\u540d\u201cspring.http.multipart.enabled\u201d\u3002<\/p><\/blockquote>\n
            spring.servlet.multipart.file-size-threshold \u53ef\u4ee5\u88ab\u7406\u89e3\u4e3a “Spring \u6846\u67b6\u4e2d\u7684\u6587\u4ef6\u5927\u5c0f\u9608\u503c”\u3002<\/h2>\n
            \u4e0a\u4f20\u6587\u4ef6\u5927\u5c0f\u7684\u9608\u503c\u662f\u6307\u6587\u4ef6\u88ab\u5199\u5165\u670d\u52a1\u5668\u78c1\u76d8\u7684\u5927\u5c0f\u3002\u5f53\u4e0a\u4f20\u7684\u6587\u4ef6\u5927\u5c0f\u8d85\u8fc7\u6b64\u5c5e\u6027\u7684\u8bbe\u5b9a\u503c\u65f6\uff0c\u8be5\u6587\u4ef6\u5c06\u88ab\u5199\u5165\u670d\u52a1\u5668\u78c1\u76d8\u3002\u5982\u679c\u4e0a\u4f20\u7684\u6587\u4ef6\u5927\u5c0f\u4f4e\u4e8e\u6b64\u5c5e\u6027\u7684\u8bbe\u5b9a\u503c\uff0c\u90a3\u4e48\u8be5\u6587\u4ef6\u5c06\u4e0d\u4f1a\u88ab\u5199\u5165\u78c1\u76d8\uff0c\u800c\u662f\u5728\u5185\u5b58\u4e2d\u4fdd\u7559\u3002\u9ed8\u8ba4\u503c\u4e3a\u201c0\u201d\u3002\u53ef\u4ee5\u5728\u6570\u5b57\u540e\u9762\u6dfb\u52a0\u5355\u4f4d\u201cMB\u201d\u6216\u201cKB\u201d\u6765\u6307\u5b9a\u9608\u503c\u3002<\/p>\n
            spring.servlet.multipart.file-size-threshold<\/span>=<\/span>100MB<\/span>\r\n<\/code><\/pre>\n
            \u8fd9\u4e2a\u5c5e\u6027\u7684\u952e\u540d\u5728Spring Boot 2.0.0\u4e2d\u5df2\u7ecf\u6539\u53d8\u3002\u5982\u679c\u4f7f\u7528Spring Boot 2.0.0\u4e4b\u524d\u7684\u7248\u672c\uff0c\u9700\u8981\u4f7f\u7528\u4e4b\u524d\u7684\u952e\u540d\u201cspring.http.multipart.file-size-threshold\u201d\u3002<\/p><\/blockquote>\n
            \u6625\u5929. servlet. \u591a\u90e8\u5206. \u4f4d\u7f6e<\/h2>\n
            \u6307\u5b9a\u60a8\u5728\u5c06\u4e0a\u4f20\u7684\u6587\u4ef6\u4f5c\u4e3a\u4e2d\u95f4\u6587\u4ef6\u5199\u5165\u670d\u52a1\u5668\u786c\u76d8\u65f6\u7684\u4f4d\u7f6e\uff08\u76ee\u5f55\uff09\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u672a\u6307\u5b9a\uff0c\u5c06\u4f7f\u7528\u5e94\u7528\u670d\u52a1\u5668\u9ed8\u8ba4\u7684\u4e34\u65f6\u6587\u4ef6\u76ee\u5f55\u3002<\/p>\n
            spring.servlet.multipart.location<\/span>=<\/span>\/upload\/temp<\/span>\r\n<\/code><\/pre>\n
            \u8fd9\u4e2a\u5c5e\u6027\u7684\u952e\u540d\u5728Spring Boot 2.0.0\u4e2d\u5df2\u7ecf\u66f4\u6539\u3002\u5982\u679c\u4f7f\u7528\u7684\u662fSpring Boot 2.0.0\u4e4b\u524d\u7684\u7248\u672c\uff0c\u5219\u9700\u8981\u4f7f\u7528\u4ee5\u524d\u7684\u952e\u540d”spring.http.multipart.location”\u3002<\/p><\/blockquote>\n
            spring.servlet.multipart.resolve-lazily \u53ef\u4ee5\u61d2\u52a0\u8f7d\u8fdb\u884c\u89e3\u6790\u3002<\/h2>\n
            \u8bbe\u7f6e\u662f\u5426\u5ef6\u8fdf\u786e\u8ba4\u5df2\u4e0a\u4f20\u6587\u4ef6\u3002\u9ed8\u8ba4\u8bbe\u7f6e\u4e3afalse\uff0c\u4e0d\u5ef6\u8fdf\u786e\u8ba4\u6587\u4ef6\u3002
            \n\u5982\u679c\u8981\u5904\u7406MultipartException\u5f02\u5e38\uff0c\u5219\u8bbe\u7f6e\u4e3atrue\u3002
            \n\u901a\u8fc7\u5ef6\u8fdf\u786e\u8ba4\uff0c\u53ef\u4ee5\u6539\u53d8\u5728\u4e0a\u4f20\u7684\u6587\u4ef6\u5927\u5c0f\u8f83\u5927\u65f6\u53d1\u751fMultipartException\u7684\u65f6\u95f4\uff0c\u4ece\u800c\u53ef\u4ee5\u5728\u63a7\u5236\u5668\u7684@ExceptionHandler\u4e2d\u6355\u83b7\u5b83\u3002<\/p>\n
            spring.servlet.multipart.resolve-lazily<\/span>=<\/span>true<\/span>\r\n<\/code><\/pre>\n
            \u8fd9\u4e2a\u5c5e\u6027\u7684\u952e\u540d\u5728Spring Boot 2.0.0\u4e2d\u5df2\u7ecf\u66f4\u6539\u3002\u5982\u679c\u4f7f\u7528\u65e9\u4e8eSpring Boot 2.0.0\u7684\u7248\u672c\uff0c\u5219\u9700\u8981\u4f7f\u7528\u4ee5\u524d\u7684\u952e\u540d\u201cspring.http.multipart.resolve-lazily\u201d\u3002<\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"
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