{"id":1397,"date":"2023-03-19T11:14:20","date_gmt":"2023-03-19T03:14:20","guid":{"rendered":"https:\/\/www.appblog.cn\/?p=1397"},"modified":"2023-04-28T21:10:17","modified_gmt":"2023-04-28T13:10:17","slug":"implement-field-validation-through-annotations-under-javax-validation-constraints","status":"publish","type":"post","link":"https:\/\/www.appblog.cn\/index.php\/2023\/03\/19\/implement-field-validation-through-annotations-under-javax-validation-constraints\/","title":{"rendered":"\u901a\u8fc7javax.validation.constraints\u4e0b\u7684\u6ce8\u89e3\u5b9e\u73b0\u5b57\u6bb5\u9a8c\u8bc1"},"content":{"rendered":"

\u6dfb\u52a0maven\u4f9d\u8d56\u5305<\/h2>\n
<!-- https:\/\/mvnrepository.com\/artifact\/javax.validation\/validation-api -->\n<dependency>\n  <groupId>javax.validation<\/groupId>\n  <artifactId>validation-api<\/artifactId>\n<\/dependency><\/code><\/pre>\n
<\/p>\n
\u5728\u6821\u9a8c\u5b57\u6bb5\u4e0a\u6dfb\u52a0\u6821\u9a8c\u6ce8\u89e3<\/h2>\n
class Person {\n    @NotNull(message = "\u5b57\u6bb5\u503c\u4e0d\u80fd\u4e3a\u7a7a")\n    private String name;\n\n    @NotNull\n    private String sex;\n\n    @Max(value = 20, message = "\u6700\u5927\u957f\u5ea6\u4e3a20")\n    private String address;\n\n    @NotNull\n    @Size(max = 10, min = 5, message = "\u5b57\u6bb5\u957f\u5ea6\u8981\u57285-10\u4e4b\u95f4")\n    private String fileName;\n\n    @Pattern(regexp = "^[a-zA-Z0-9_.-]+@[a-zA-Z0-9-]+(\\\\.[a-zA-Z0-9-]+)*\\\\.[a-zA-Z0-9]{2,6}$", message = "\u4e0d\u6ee1\u8db3\u90ae\u7bb1\u6b63\u5219\u8868\u8fbe\u5f0f")\n    private String email;\n\n    @AssertTrue(message = "\u5b57\u6bb5\u4e3atrue\u624d\u80fd\u901a\u8fc7")\n    private boolean isSave;\n\n    @Future(message = "\u65f6\u95f4\u5728\u5f53\u524d\u65f6\u95f4\u4e4b\u540e\u624d\u53ef\u4ee5\u901a\u8fc7")\n    private Date date;\n\n}<\/code><\/pre>\n
\u5728\u63a7\u5236\u5668\u63a5\u6536\u53c2\u6570\u65f6\uff0c\u6dfb\u52a0@Valid<\/code>\u6ce8\u89e3\uff0c\u4f8b\u5982\uff1a<\/p>\n
public String index(@Valid Person person, BindingResult result)<\/code><\/pre>\n
\u53ef\u4ee5\u901a\u8fc7BindingResult\u5bf9\u8c61\u83b7\u53d6\u76f8\u5173\u7684\u9519\u8bef\u63d0\u793a\u3002<\/p>\n
\u4e5f\u53ef\u4ee5\u81ea\u5b9a\u4e49\u9a8c\u8bc1\u65b9\u5f0f<\/p>\n
@Component\npublic class ValidatorHelper {\n\n    @Autowired\n    private Validator validator;\n\n    public <T> Pair<Boolean, String> validate(T request) {\n        if (request == null) {\n            return Pair.of(Boolean.FALSE, "request is null");\n        }\n\n        Set<ConstraintViolation<T>> r = validator.validate(request);\n        Iterator<ConstraintViolation<T>> it = r.iterator();\n        if (it.hasNext()) {\n            ConstraintViolation<T> c = it.next();\n            return Pair.of(Boolean.FALSE, String.format("[%s]%s", c.getPropertyPath(), c.getMessage()));\n        }\n        return Pair.of(Boolean.TRUE, "validate success");\n    }\n\n}<\/code><\/pre>\n
\u9a8c\u8bc1\u7684\u6ce8\u89e3<\/h2>\n
\uff081\uff09@NotNull<\/code><\/p>\n
\u4f7f\u7528\u8be5\u6ce8\u89e3\u7684\u5b57\u6bb5\u7684\u503c\u4e0d\u80fd\u4e3anull\uff0c\u5426\u5219\u9a8c\u8bc1\u65e0\u6cd5\u901a\u8fc7<\/p>\n
\uff082\uff09@Null<\/code><\/p>\n
\u4fee\u9970\u7684\u5b57\u6bb5\u5728\u9a8c\u8bc1\u65f6\u5fc5\u987b\u662fnull\uff0c\u5426\u5219\u9a8c\u8bc1\u65e0\u6cd5\u901a\u8fc7<\/p>\n
\uff083\uff09@Size<\/code><\/p>\n
\u5982\u4e0b\u4ee3\u7801\u8868\u793a\uff0c\u4fee\u9970\u7684\u5b57\u6bb5\u957f\u5ea6\u4e0d\u80fd\u8d85\u8fc75\u6216\u8005\u4f4e\u4e8e1<\/p>\n
@Size(min = 1, max = 5)\nprivate String name;<\/code><\/pre>\n
\uff084\uff09@Max<\/code><\/p>\n
\u5982\u4e0b\u4ee3\u7801\u8868\u793a\uff0c\u8be5\u5b57\u6bb5\u7684\u6700\u5927\u503c\u4e3a19\uff0c\u5426\u5219\u65e0\u6cd5\u901a\u8fc7\u9a8c\u8bc1<\/p>\n
@Max(value = 19)\nprivate Integer age;<\/code><\/pre>\n
\uff085\uff09@Min<\/code><\/p>\n
\u540c\u7406\uff0c\u88ab\u8be5\u6ce8\u89e3\u4fee\u9970\u7684\u5b57\u6bb5\u7684\u6700\u5c0f\u503c\uff0c\u4e0d\u80fd\u4f4e\u4e8e\u67d0\u4e2a\u503c<\/p>\n
\uff086\uff09@AssertFalse<\/code><\/p>\n
\u8be5\u5b57\u6bb5\u503c\u4e3afalse\u65f6\uff0c\u9a8c\u8bc1\u624d\u80fd\u901a\u8fc7<\/p>\n
\uff087\uff09`@AssertTrue<\/p>\n
\u8be5\u5b57\u6bb5\u503c\u4e3atrue\u65f6\uff0c\u9a8c\u8bc1\u624d\u80fd\u901a\u8fc7<\/p>\n
\uff088\uff09@DecimalMax<\/code><\/p>\n
\u9a8c\u8bc1\u5c0f\u6570\u7684\u6700\u5927\u503c<\/p>\n
@DecimalMax(value = "12.35")\nprivate double money;<\/code><\/pre>\n
\uff089\uff09@DecimalMin<\/code><\/p>\n
\u9a8c\u8bc1\u5c0f\u6570\u7684\u6700\u5c0f\u503c<\/p>\n
\uff0810\uff09@Digits<\/code><\/p>\n
\u9a8c\u8bc1\u6570\u5b57\u7684\u6574\u6570\u4f4d\u548c\u5c0f\u6570\u4f4d\u7684\u4f4d\u6570\u662f\u5426\u8d85\u8fc7\u6307\u5b9a\u7684\u957f\u5ea6<\/p>\n
@Digits(integer = 2, fraction = 2)\nprivate double money;<\/code><\/pre>\n
\uff0811\uff09@Future<\/code><\/p>\n
\u9a8c\u8bc1\u65e5\u671f\u662f\u5426\u5728\u5f53\u524d\u65f6\u95f4\u4e4b\u540e\uff0c\u5426\u5219\u65e0\u6cd5\u901a\u8fc7\u6821\u9a8c<\/p>\n
@Future\nprivate Date date;<\/code><\/pre>\n
\uff0812\uff09@Past<\/code><\/p>\n
\u9a8c\u8bc1\u65e5\u671f\u662f\u5426\u5728\u5f53\u524d\u65f6\u95f4\u4e4b\u524d\uff0c\u5426\u5219\u65e0\u6cd5\u901a\u8fc7\u6821\u9a8c<\/p>\n
\uff0813\uff09@Pattern<\/code><\/p>\n
\u7528\u4e8e\u9a8c\u8bc1\u5b57\u6bb5\u662f\u5426\u4e0e\u7ed9\u5b9a\u7684\u6b63\u5219\u76f8\u5339\u914d<\/p>\n
@Pattern(regexp = "[abc]")\nprivate String name;<\/code><\/pre>\n
@NotEmpty, @NotNull, @NotBlank \u7684\u533a\u522b<\/h2>\n
\uff081\uff09@NotEmpty<\/code><\/p>\n
The annotated element must not be {@code null} nor empty.
\n\u4e0d\u80fd\u662fnull
\n\u4e0d\u80fd\u662f\u7a7a\u5b57\u7b26
\n\u96c6\u5408\u6846\u67b6\u4e2d\u7684\u5143\u7d20\u4e0d\u80fd\u4e3a\u7a7a<\/p>\n
\uff082\uff09@NotNul<\/code><\/p>\n
\u88ab\u4fee\u9970\u5143\u7d20\u4e0d\u80fd\u4e3anull\uff0c\u53ef\u7528\u5728\u57fa\u672c\u7c7b\u578b\u4e0a<\/p>\n
\uff083\uff09@NotBlank<\/code><\/p>\n
The annotated element must not be {@code null} and must contain at least one non-whitespace character.<\/p>\n
\u8be5\u6ce8\u89e3\u7528\u6765\u5224\u65ad\u5b57\u7b26\u4e32\u6216\u8005\u5b57\u7b26\uff0c\u53ea\u7528\u5728String\u4e0a\u9762<\/p>\n
\u5982\u679c\u5728\u57fa\u672c\u7c7b\u578b\u4e0a\u9762\u7528@NotEmpty<\/code>\u6216\u8005@NotBlank<\/code>\uff0c\u4f1a\u51fa\u73b0\u4ee5\u4e0b\u9519\u8bef<\/p>\n
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is javax.validation.UnexpectedTypeException: HV000030: No validator could be found for constraint 'javax.validation.constraints.NotBlank' validating type 'java.lang.Long'. Check configuration for 'offset'<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u6dfb\u52a0maven\u4f9d\u8d56\u5305 <!– https:\/\/mvnrepository.com\/artifact\/j […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[43],"tags":[],"class_list":["post-1397","post","type-post","status-publish","format-standard","hentry","category-java-basic"],"_links":{"self":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1397","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/comments?post=1397"}],"version-history":[{"count":0,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1397\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1397"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1397"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1397"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}