\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3068\u4fe1\u983c\u6027\u306f\u3001\u73fe\u4ee3\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u306b\u304a\u3044\u3066\u975e\u5e38\u306b\u91cd\u8981\u306a\u8981\u7d20\u3067\u3059\u3002Spring Framework\u306f\u3001\u3053\u306e\u8ab2\u984c\u306b\u5bfe\u3057\u3066\u5f37\u529b\u306a\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u6a5f\u80fd\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001Spring Framework Validation\u306e\u57fa\u790e\u304b\u3089\u5fdc\u7528\u307e\u3067\u3001\u5305\u62ec\u7684\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
Spring Framework 6.1\uff082024\u5e74\u73fe\u5728\u306e\u6700\u65b0\u30d0\u30fc\u30b8\u30e7\u30f3\uff09\u3067\u306f\u3001\u3088\u308a\u67d4\u8edf\u3067\u52b9\u7387\u7684\u306a\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u6a5f\u80fd\u304c\u5c0e\u5165\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3092\u901a\u3058\u3066\u3001\u4ee5\u4e0b\u306e\u5185\u5bb9\u3092\u5b66\u3076\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n
\u521d\u5fc3\u8005\u304b\u3089\u4e2d\u7d1a\u8005\u307e\u3067\u3001Spring Framework Validation\u306e\u30b9\u30ad\u30eb\u3092\u4e00\u6bb5\u968e\u4e0a\u3052\u305f\u3044\u958b\u767a\u8005\u306e\u7686\u69d8\u306b\u3001\u5b9f\u8df5\u7684\u3067\u4fa1\u5024\u3042\u308b\u60c5\u5831\u3092\u304a\u5c4a\u3051\u3057\u307e\u3059\u3002\u305c\u3072\u6700\u5f8c\u307e\u3067\u304a\u4ed8\u304d\u5408\u3044\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n
\u76ee\u6b21 <\/p>\n
Spring Framework Validation\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30c7\u30fc\u30bf\u6574\u5408\u6027\u3092\u78ba\u4fdd\u3059\u308b\u305f\u3081\u306e\u5f37\u529b\u306a\u6a5f\u80fd\u30bb\u30c3\u30c8\u3067\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u305d\u306e\u57fa\u672c\u6982\u5ff5\u3068\u91cd\u8981\u6027\u3001\u305d\u3057\u3066\u4e3b\u8981\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u30c7\u30fc\u30bf\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306f\u3001\u4ee5\u4e0b\u306e\u7406\u7531\u304b\u3089\u73fe\u4ee3\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u306b\u304a\u3044\u3066\u6975\u3081\u3066\u91cd\u8981\u3067\u3059\uff1a<\/p>\n\n\n\n
Spring Framework\u306f\u3001\u3053\u308c\u3089\u306e\u8ab2\u984c\u306b\u5bfe\u3057\u3066\u5305\u62ec\u7684\u306a\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u5ba3\u8a00\u7684\u306a\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3001\u8c4a\u5bcc\u306a\u7d44\u307f\u8fbc\u307f\u30d0\u30ea\u30c7\u30fc\u30bf\u3001\u305d\u3057\u3066\u30ab\u30b9\u30bf\u30e0\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306e\u5bb9\u6613\u306a\u5b9f\u88c5\u306a\u3069\u3001\u958b\u767a\u8005\u304c\u52b9\u7387\u7684\u306b\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30ed\u30b8\u30c3\u30af\u3092\u5b9f\u88c5\u3067\u304d\u308b\u74b0\u5883\u3092\u6574\u3048\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
Spring Validation\u306f\u3001\u4ee5\u4e0b\u306e\u4e3b\u8981\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067\u69cb\u6210\u3055\u308c\u3066\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n
public class User {\n @NotNull(message = \"Name cannot be null\")\n @Size(min = 2, max = 30, message = \"Name must be between 2 and 30 characters\")\n private String name;\n\n @Email(message = \"Email should be valid\")\n private String email;\n\n \/\/ getters and setters\n}<\/pre>\n\n\n\n\n- Validator \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9<\/strong>: \u30d7\u30ed\u30b0\u30e9\u30e0\u7684\u306b\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u884c\u3059\u308b\u305f\u3081\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3067\u3059\u3002<\/li>\n<\/ol>\n\n\n\n
public class UserValidator implements Validator {\n @Override\n public boolean supports(Class<?> clazz) {\n return User.class.equals(clazz);\n }\n\n @Override\n public void validate(Object target, Errors errors) {\n User user = (User) target;\n if (user.getName().startsWith(\"Admin\")) {\n errors.rejectValue(\"name\", \"name.reserved\", \"Name cannot start with 'Admin'\");\n }\n }\n}<\/pre>\n\n\n\n\n- BindingResult \u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/strong>: \u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u7d50\u679c\u3092\u4fdd\u6301\u3057\u3001\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u7ba1\u7406\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n
@PostMapping(\"\/user\")\npublic String createUser(@Valid @ModelAttribute User user, BindingResult result) {\n if (result.hasErrors()) {\n return \"userForm\";\n }\n \/\/ \u30e6\u30fc\u30b6\u30fc\u767b\u9332\u51e6\u7406\n return \"redirect:\/success\";\n}<\/pre>\n\n\n\n\n- ValidationUtils \u30af\u30e9\u30b9<\/strong>: \u5171\u901a\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30bf\u30b9\u30af\u3092\u7c21\u7d20\u5316\u3059\u308b\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30af\u30e9\u30b9\u3067\u3059\u3002<\/li>\n<\/ol>\n\n\n\n
public void validate(Object target, Errors errors) {\n ValidationUtils.rejectIfEmptyOrWhitespace(errors, \"name\", \"name.required\", \"Name is required\");\n \/\/ \u305d\u306e\u4ed6\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30ed\u30b8\u30c3\u30af\n}<\/pre>\n\n\n\nSpring Framework Validation\u306e\u5229\u70b9\u306f\u3001\u5ba3\u8a00\u7684\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u3068\u67d4\u8edf\u306a\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u6027\u306b\u3042\u308a\u307e\u3059\u3002\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30e2\u30c7\u30eb\u30af\u30e9\u30b9\u306b\u76f4\u63a5\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30eb\u30fc\u30eb\u3092\u5b9a\u7fa9\u3067\u304d\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002\u307e\u305f\u3001\u30ab\u30b9\u30bf\u30e0\u30d0\u30ea\u30c7\u30fc\u30bf\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u3067\u3001\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u306b\u7279\u5316\u3057\u305f\u8907\u96d1\u306a\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3082\u5b9f\u73fe\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n
\u4ee5\u4e0b\u306b\u3001Spring Validation\u306e\u4e3b\u306a\u5229\u70b9\u3092\u307e\u3068\u3081\u307e\u3059\uff1a<\/p>\n\n\n\n
<\/i><\/span>\u5229\u70b9<\/div><\/div>\n\n- \u5ba3\u8a00\u7684\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3<\/strong>: \u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u3066\u7c21\u6f54\u306b\u30eb\u30fc\u30eb\u3092\u5b9a\u7fa9\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n
- \u62e1\u5f35\u6027<\/strong>: \u30ab\u30b9\u30bf\u30e0\u30d0\u30ea\u30c7\u30fc\u30bf\u3084\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3067\u72ec\u81ea\u306e\u30eb\u30fc\u30eb\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n
- \u7d71\u5408\u6027<\/strong>: Spring MVC\u3084Spring Boot\u3068 seamless\u306b\u7d71\u5408\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n
- \u56fd\u969b\u5316\u5bfe\u5fdc<\/strong>: \u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u591a\u8a00\u8a9e\u5316\u304c\u5bb9\u6613\u3067\u3059\u3002<\/li>\n\n\n\n
- \u30c6\u30b9\u30c8\u5bb9\u6613\u6027<\/strong>: \u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30ed\u30b8\u30c3\u30af\u3092\u5358\u72ec\u3067\u30c6\u30b9\u30c8\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ol>\n<\/div><\/div><\/div>\n\n\n\n
\u4e00\u65b9\u3067\u3001Spring Validation\u306e\u9650\u754c\u3084\u6ce8\u610f\u70b9\u3082\u7406\u89e3\u3057\u3066\u304a\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n
<\/i><\/span>\u6ce8\u610f<\/div><\/div>\n\n- \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9<\/strong>: \u5927\u91cf\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u884c\u3046\u5834\u5408\u3001\u51e6\u7406\u6642\u9593\u306b\u5f71\u97ff\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n\n\n\n
- \u8907\u96d1\u6027<\/strong>: \u9ad8\u5ea6\u306a\u30ab\u30b9\u30bf\u30e0\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306f\u5b9f\u88c5\u304c\u8907\u96d1\u306b\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n\n\n\n
- \u30d0\u30fc\u30b8\u30e7\u30f3\u4f9d\u5b58<\/strong>: Spring Framework\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u3088\u3063\u3066\u3001\u4e00\u90e8\u306e\u6a5f\u80fd\u3084\u52d5\u4f5c\u304c\u7570\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<\/ol>\n<\/div><\/div><\/div>\n\n\n\n
Spring Framework Validation\u306f\u3001\u3053\u308c\u3089\u306e\u7279\u5fb4\u3092\u7406\u89e3\u3057\u305f\u4e0a\u3067\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u5805\u7262\u3067\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u3092\u652f\u63f4\u3057\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u5177\u4f53\u7684\u306a\u5b9f\u88c5\u65b9\u6cd5\u3068\u5fdc\u7528\u30c6\u30af\u30cb\u30c3\u30af\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
2. Spring Validation\u306e\u57fa\u672c\u7684\u306a\u5b9f\u88c5\u65b9\u6cd5<\/h2>\n\n\n\n
Spring Framework\u3067\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u5b9f\u88c5\u306b\u306f\u3001\u4e3b\u306b\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u30d9\u30fc\u30b9\u306e\u65b9\u6cd5\u3068\u30d7\u30ed\u30b0\u30e9\u30e0\u7684\u306a\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u4e21\u65b9\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3001\u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\u3092\u4ea4\u3048\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
2.1 \u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u30d9\u30fc\u30b9\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u8a2d\u5b9a<\/h3>\n\n\n\n
\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u30d9\u30fc\u30b9\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306f\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u3092\u9ad8\u3081\u308b\u52b9\u679c\u7684\u306a\u65b9\u6cd5\u3067\u3059\u3002Spring Framework\u306fJava Bean Validation\uff08JSR 380\uff09\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u304a\u308a\u3001javax.validation\u30d1\u30c3\u30b1\u30fc\u30b8\u306e\u6a19\u6e96\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u4ee5\u4e0b\u306b\u4e3b\u8981\u306a\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3068\u305d\u306e\u4f7f\u7528\u4f8b\u3092\u793a\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n
import javax.validation.constraints.*;\n\npublic class User {\n @NotNull(message = \"Name cannot be null\")\n @Size(min = 2, max = 30, message = \"Name must be between 2 and 30 characters\")\n private String name;\n\n @Email(message = \"Email should be valid\")\n private String email;\n\n @Min(value = 18, message = \"Age should not be less than 18\")\n @Max(value = 150, message = \"Age should not be greater than 150\")\n private int age;\n\n @Pattern(regexp = \"^[0-9]{10}$\", message = \"Phone number must be 10 digits\")\n private String phoneNumber;\n\n \/\/ getters and setters\n}<\/pre>\n\n\n\n\u3053\u308c\u3089\u306e\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30d5\u30a3\u30fc\u30eb\u30c9\u30ec\u30d9\u30eb\u3067\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30eb\u30fc\u30eb\u3092\u7c21\u6f54\u306b\u5b9a\u7fa9\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
Spring Framework\u306f\u3001\u72ec\u81ea\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3082\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n
import org.springframework.format.annotation.DateTimeFormat;\n\npublic class Event {\n @DateTimeFormat(pattern = \"yyyy-MM-dd\")\n @Future(message = \"Event date must be in the future\")\n private Date eventDate;\n\n \/\/ \u305d\u306e\u4ed6\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3068getter\/setter\n}<\/pre>\n\n\n\n2.2 \u30ab\u30b9\u30bf\u30e0\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30eb\u30fc\u30eb\u306e\u4f5c\u6210\u624b\u9806<\/h3>\n\n\n\n
\u7279\u5b9a\u306e\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u306b\u57fa\u3065\u3044\u305f\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u304c\u5fc5\u8981\u306a\u5834\u5408\u3001\u30ab\u30b9\u30bf\u30e0\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30eb\u30fc\u30eb\u3092\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u30ab\u30b9\u30bf\u30e0\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306e\u5b9f\u88c5\u624b\u9806\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\n- \u30ab\u30b9\u30bf\u30e0\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u5b9a\u7fa9:<\/li>\n<\/ol>\n\n\n\n
import javax.validation.Constraint;\nimport javax.validation.Payload;\nimport java.lang.annotation.*;\n\n@Documented\n@Constraint(validatedBy = PasswordStrengthValidator.class)\n@Target({ElementType.FIELD})\n@Retention(RetentionPolicy.RUNTIME)\npublic @interface StrongPassword {\n String message() default \"Password must be strong\";\n Class<?>[] groups() default {};\n Class<? extends Payload>[] payload() default {};\n}<\/pre>\n\n\n\n\n- ConstraintValidator\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u5b9f\u88c5:<\/li>\n<\/ol>\n\n\n\n
import javax.validation.ConstraintValidator;\nimport javax.validation.ConstraintValidatorContext;\n\npublic class PasswordStrengthValidator implements ConstraintValidator<StrongPassword, String> {\n\n @Override\n public void initialize(StrongPassword constraintAnnotation) {\n }\n\n @Override\n public boolean isValid(String password, ConstraintValidatorContext context) {\n return password != null && password.length() >= 8 &&\n password.matches(\".*[A-Z].*\") && password.matches(\".*[a-z].*\") &&\n password.matches(\".*[0-9].*\") && password.matches(\".*[!@#$%^&*].*\");\n }\n}<\/pre>\n\n\n\n\n- \u30ab\u30b9\u30bf\u30e0\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u4f7f\u7528:<\/li>\n<\/ol>\n\n\n\n
public class User {\n @StrongPassword(message = \"Password must contain at least 8 characters, including uppercase, lowercase, number, and special character\")\n private String password;\n\n \/\/ \u305d\u306e\u4ed6\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3068getter\/setter\n}<\/pre>\n\n\n\n\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u7d50\u679c\u306e\u51e6\u7406\u306f\u3001\u901a\u5e38BindingResult<\/code>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u7528\u3057\u3066\u884c\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n@PostMapping(\"\/user\")\npublic String createUser(@Valid @ModelAttribute User user, BindingResult result, Model model) {\n if (result.hasErrors()) {\n return \"userForm\";\n }\n \/\/ \u30e6\u30fc\u30b6\u30fc\u767b\u9332\u51e6\u7406\n return \"redirect:\/success\";\n}<\/pre>\n\n\n\n\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u306f\u3001messages.properties<\/code>\u30d5\u30a1\u30a4\u30eb\u3092\u4f7f\u7528\u3057\u3066\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\nNotNull.user.name=Name is required\nSize.user.name=Name must be between {2} and {1} characters\nEmail.user.email=Please provide a valid email address\nStrongPassword.user.password=Password must be strong (8+ chars, upper, lower, digit, special)<\/pre>\n\n\n\n\u3053\u308c\u3089\u306e\u57fa\u672c\u7684\u306a\u5b9f\u88c5\u65b9\u6cd5\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001Spring Framework\u3092\u4f7f\u7528\u3057\u305f\u52b9\u679c\u7684\u306a\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u51e6\u7406\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3088\u308a\u9ad8\u5ea6\u306a\u4f7f\u7528\u6280\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
3. Spring Validation\u306e\u9ad8\u5ea6\u306a\u4f7f\u7528\u6280\u6cd5<\/h2>\n\n\n\n
Spring Framework\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u6a5f\u80fd\u306f\u3001\u57fa\u672c\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u3060\u3051\u3067\u306a\u304f\u3001\u3088\u308a\u8907\u96d1\u306a\u30b7\u30ca\u30ea\u30aa\u306b\u5bfe\u5fdc\u3067\u304d\u308b\u9ad8\u5ea6\u306a\u6280\u6cd5\u3082\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30b0\u30eb\u30fc\u30d7\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3068\u30af\u30ed\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u4e2d\u5fc3\u306b\u3001Spring Validation\u306e\u9ad8\u5ea6\u306a\u4f7f\u7528\u6280\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
3.1 \u30b0\u30eb\u30fc\u30d7\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306e\u6d3b\u7528\u30b7\u30ca\u30ea\u30aa\u3068\u5b9f\u88c5<\/h3>\n\n\n\n
\u30b0\u30eb\u30fc\u30d7\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306f\u3001\u540c\u3058\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306b\u5bfe\u3057\u3066\u7570\u306a\u308b\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30eb\u30fc\u30eb\u3092\u9069\u7528\u3057\u305f\u3044\u5834\u5408\u306b\u975e\u5e38\u306b\u6709\u7528\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u30e6\u30fc\u30b6\u30fc\u767b\u9332\u6642\u3068\u66f4\u65b0\u6642\u3067\u7570\u306a\u308b\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30eb\u30fc\u30eb\u3092\u9069\u7528\u3059\u308b\u5834\u5408\u306a\u3069\u304c\u8a72\u5f53\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u30b0\u30eb\u30fc\u30d7\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306e\u5b9f\u88c5\u624b\u9806\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n\n\n\n
\n- \u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30b0\u30eb\u30fc\u30d7\u306e\u5b9a\u7fa9:<\/li>\n<\/ol>\n\n\n\n
public interface CreateUser {}\npublic interface UpdateUser {}<\/pre>\n\n\n\n\n- \u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u30af\u30e9\u30b9\u3067\u30b0\u30eb\u30fc\u30d7\u3092\u6307\u5b9a:<\/li>\n<\/ol>\n\n\n\n
public class User {\n @NotNull(groups = {CreateUser.class, UpdateUser.class})\n @Size(min = 2, max = 30, groups = {CreateUser.class, UpdateUser.class})\n private String name;\n\n @NotNull(groups = CreateUser.class)\n @Email(groups = {CreateUser.class, UpdateUser.class})\n private String email;\n\n @NotNull(groups = CreateUser.class)\n @Size(min = 8, groups = CreateUser.class)\n private String password;\n\n\n\/\/ getters and setters\n}<\/pre>\n\n\n\n\n- \u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u30fc\u3067\u30b0\u30eb\u30fc\u30d7\u3092\u6307\u5b9a\u3057\u3066\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u884c:<\/li>\n<\/ol>\n\n\n\n
@PostMapping(\"\/user\/create\")\npublic String createUser(@Validated(CreateUser.class) @ModelAttribute User user, BindingResult result) {\n if (result.hasErrors()) {\n return \"userForm\";\n }\n \/\/ \u30e6\u30fc\u30b6\u30fc\u4f5c\u6210\u30ed\u30b8\u30c3\u30af\n return \"redirect:\/success\";\n}\n\n@PostMapping(\"\/user\/update\")\npublic String updateUser(@Validated(UpdateUser.class) @ModelAttribute User user, BindingResult result) {\n if (result.hasErrors()) {\n return \"userForm\";\n }\n \/\/ \u30e6\u30fc\u30b6\u30fc\u66f4\u65b0\u30ed\u30b8\u30c3\u30af\n return \"redirect:\/success\";\n}<\/pre>\n\n\n\n\u3053\u306e\u65b9\u6cd5\u306b\u3088\u308a\u3001\u540c\u3058User\u30af\u30e9\u30b9\u306b\u5bfe\u3057\u3066\u3001\u4f5c\u6210\u6642\u3068\u66f4\u65b0\u6642\u3067\u7570\u306a\u308b\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30eb\u30fc\u30eb\u3092\u9069\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
3.2 \u30af\u30ed\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306e\u5b9f\u73fe\u65b9\u6cd5<\/h3>\n\n\n\n
\u30af\u30ed\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306f\u3001\u8907\u6570\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u9593\u306e\u95a2\u4fc2\u6027\u3092\u691c\u8a3c\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u30d1\u30b9\u30ef\u30fc\u30c9\u3068\u78ba\u8a8d\u7528\u30d1\u30b9\u30ef\u30fc\u30c9\u304c\u4e00\u81f4\u3059\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u5834\u5408\u306a\u3069\u3067\u3059\u3002<\/p>\n\n\n\n
\u30af\u30ed\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u73fe\u3059\u308b\u4e3b\u306a\u65b9\u6cd5\u306f\u4ee5\u4e0b\u306e2\u3064\u3067\u3059\uff1a<\/p>\n\n\n\n
\n- \u30ab\u30b9\u30bf\u30e0\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3068\u30d0\u30ea\u30c7\u30fc\u30bf\u306e\u4f5c\u6210<\/li>\n\n\n\n
- \u30af\u30e9\u30b9\u30ec\u30d9\u30eb\u3067\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3<\/li>\n<\/ol>\n\n\n\n
\u4ee5\u4e0b\u306b\u3001\u30ab\u30b9\u30bf\u30e0\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u305f\u30af\u30ed\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306e\u4f8b\u3092\u793a\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n
\n- \u30ab\u30b9\u30bf\u30e0\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u5b9a\u7fa9:<\/li>\n<\/ol>\n\n\n\n
<\/p>\n\n\n\n
@Target({ElementType.TYPE})\n@Retention(RetentionPolicy.RUNTIME)\n@Constraint(validatedBy = PasswordMatchValidator.class)\npublic @interface PasswordMatch {\n String message() default \"Passwords do not match\";\n Class<?>[] groups() default {};\n Class<? extends Payload>[] payload() default {};\n}<\/pre>\n\n\n\n\n- \u30d0\u30ea\u30c7\u30fc\u30bf\u306e\u5b9f\u88c5:<\/li>\n<\/ol>\n\n\n\n
public class PasswordMatchValidator implements ConstraintValidator<PasswordMatch, Object> {\n\n @Override\n public void initialize(PasswordMatch constraintAnnotation) {\n }\n\n @Override\n public boolean isValid(Object obj, ConstraintValidatorContext context) {\n User user = (User) obj;\n return user.getPassword().equals(user.getConfirmPassword());\n }\n}<\/pre>\n\n\n\n\n- \u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u9069\u7528:<\/li>\n<\/ol>\n\n\n\n
@PasswordMatch(message = \"Password and Confirm Password must match\")\npublic class User {\n private String password;\n private String confirmPassword;\n\n \/\/ \u305d\u306e\u4ed6\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3001getters\u3001setters\n}<\/pre>\n\n\n\n\u3053\u306e\u65b9\u6cd5\u306b\u3088\u308a\u3001\u30d1\u30b9\u30ef\u30fc\u30c9\u3068\u78ba\u8a8d\u7528\u30d1\u30b9\u30ef\u30fc\u30c9\u304c\u4e00\u81f4\u3057\u3066\u3044\u308b\u304b\u3092\u691c\u8a3c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u3055\u3089\u306b\u3001Spring Validation\u3067\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u9ad8\u5ea6\u306a\u6280\u6cd5\u3082\u6d3b\u7528\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n
\n- \u8907\u5408\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3<\/strong>: \u8907\u6570\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30eb\u30fc\u30eb\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u3001\u3088\u308a\u8907\u96d1\u306a\u6761\u4ef6\u3092\u8868\u73fe\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ul>\n\n\n\n
@Pattern(regexp = \"^[A-Z].*\", message = \"Must start with an uppercase letter\")\n@Size(min = 8, max = 30, message = \"Must be between 8 and 30 characters\")\nprivate String username;<\/pre>\n\n\n\n
\n- \u6761\u4ef6\u4ed8\u304d\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3<\/strong>: \u7279\u5b9a\u306e\u6761\u4ef6\u4e0b\u3067\u306e\u307f\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u9069\u7528\u3057\u305f\u3044\u5834\u5408\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u30ab\u30b9\u30bf\u30e0\u30d0\u30ea\u30c7\u30fc\u30bf\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u3067\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002 <\/li>\n\n\n\n
- \u30ab\u30b9\u30ab\u30fc\u30c9\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3<\/strong>: \u30cd\u30b9\u30c8\u3055\u308c\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5bfe\u3057\u3066\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u9069\u7528\u3059\u308b\u5834\u5408\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002
@Valid<\/code>\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u3066\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ul>\n\n\n\npublic class Order {\n @Valid\n private Customer customer;\n\n \/\/ \u305d\u306e\u4ed6\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\n}<\/pre>\n\n\n\n\n- \u52d5\u7684\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3<\/strong>: \u5b9f\u884c\u6642\u306b\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30eb\u30fc\u30eb\u3092\u5909\u66f4\u3057\u305f\u3044\u5834\u5408\u306f\u3001
Validator<\/code>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3057\u305f\u30ab\u30b9\u30bf\u30e0\u30d0\u30ea\u30c7\u30fc\u30bf\u3092\u4f5c\u6210\u3057\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u7684\u306b\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u884c\u3046\u3053\u3068\u3067\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ul>\n\n\n\n\u3053\u308c\u3089\u306e\u9ad8\u5ea6\u306a\u4f7f\u7528\u6280\u6cd5\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u8907\u96d1\u306a\u30d3\u30b8\u30cd\u30b9\u30eb\u30fc\u30eb\u3084\u8981\u4ef6\u306b\u5bfe\u5fdc\u3057\u305f\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u904e\u5ea6\u306b\u8907\u96d1\u306a\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30ed\u30b8\u30c3\u30af\u306f\u4fdd\u5b88\u6027\u3092\u4f4e\u4e0b\u3055\u305b\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u305f\u3081\u3001\u9069\u5207\u306a\u30d0\u30e9\u30f3\u30b9\u3092\u4fdd\u3064\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n
\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001RESTful API\u306b\u304a\u3051\u308bSpring Validation\u306e\u6700\u9069\u306a\u5229\u7528\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
4. RESTful API\u306b\u304a\u3051\u308bSpring Validation\u306e\u6700\u9069\u306a\u5229\u7528\u6cd5<\/h2>\n\n\n\n
RESTful API\u306e\u8a2d\u8a08\u3068\u5b9f\u88c5\u306b\u304a\u3044\u3066\u3001\u9069\u5207\u306a\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306f\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304b\u3089\u53d7\u3051\u53d6\u308b\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3092\u78ba\u4fdd\u3057\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30ea\u30b9\u30af\u3092\u8efd\u6e1b\u3059\u308b\u3060\u3051\u3067\u306a\u304f\u3001API\u306e\u5805\u7262\u6027\u3068\u4fe1\u983c\u6027\u3092\u9ad8\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001Spring Framework\u3092\u4f7f\u7528\u3057\u305fRESTful API\u306b\u304a\u3051\u308b\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306e\u6700\u9069\u306a\u5b9f\u88c5\u65b9\u6cd5\u3068\u3001\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
4.1 \u30ea\u30af\u30a8\u30b9\u30c8\u30dc\u30c7\u30a3\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u5b9f\u88c5\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n
RESTful API\u3067\u306f\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u30dc\u30c7\u30a3\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u304c\u7279\u306b\u91cd\u8981\u3067\u3059\u3002Spring Framework\u3067\u306f\u3001@Valid<\/code>\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u7c21\u5358\u306b\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n\n- DTO\u30af\u30e9\u30b9\u306e\u5b9a\u7fa9:<\/li>\n<\/ol>\n\n\n\n
public class UserDTO {\n @NotNull(message = \"Name cannot be null\")\n @Size(min = 2, max = 30, message = \"Name must be between 2 and 30 characters\")\n private String name;\n\n @Email(message = \"Email should be valid\")\n private String email;\n\n @Min(value = 18, message = \"Age should not be less than 18\")\n private int age;\n\n \/\/ getters and setters\n}<\/pre>\n\n\n\n\n- \u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u30fc\u3067\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3:<\/li>\n<\/ol>\n\n\n\n
@RestController\n@RequestMapping(\"\/api\/users\")\npublic class UserController {\n\n @PostMapping\n public ResponseEntity<UserDTO> createUser(@Valid @RequestBody UserDTO userDTO) {\n \/\/ \u30e6\u30fc\u30b6\u30fc\u4f5c\u6210\u30ed\u30b8\u30c3\u30af\n return ResponseEntity.ok(userDTO);\n }\n}<\/pre>\n\n\n\n\u3053\u306e\u65b9\u6cd5\u306b\u3088\u308a\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u30dc\u30c7\u30a3\u304c\u81ea\u52d5\u7684\u306b\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3055\u308c\u3001\u7121\u52b9\u306a\u30c7\u30fc\u30bf\u304c\u691c\u51fa\u3055\u308c\u305f\u5834\u5408\u306fMethodArgumentNotValidException<\/code>\u304c\u30b9\u30ed\u30fc\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n4.2 \u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n
\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30a8\u30e9\u30fc\u3092\u9069\u5207\u306b\u51e6\u7406\u3057\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306b\u6709\u7528\u306a\u60c5\u5831\u3092\u8fd4\u3059\u3053\u3068\u306f\u3001\u826f\u3044API\u8a2d\u8a08\u306e\u91cd\u8981\u306a\u8981\u7d20\u3067\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u30b0\u30ed\u30fc\u30d0\u30eb\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u5b9f\u88c5\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
@ControllerAdvice\npublic class GlobalExceptionHandler extends ResponseEntityExceptionHandler {\n\n @Override\n protected ResponseEntity<Object> handleMethodArgumentNotValid(MethodArgumentNotValidException ex,\n HttpHeaders headers, HttpStatus status, WebRequest request) {\n Map<String, String> errors = new HashMap<>();\n ex.getBindingResult().getAllErrors().forEach((error) -> {\n String fieldName = ((FieldError) error).getField();\n String errorMessage = error.getDefaultMessage();\n errors.put(fieldName, errorMessage);\n });\n return new ResponseEntity<>(errors, HttpStatus.BAD_REQUEST);\n }\n\n @ExceptionHandler(ConstraintViolationException.class)\n public ResponseEntity<Object> handleConstraintViolationException(ConstraintViolationException ex) {\n Map<String, String> errors = new HashMap<>();\n ex.getConstraintViolations().forEach(violation -> {\n String fieldName = violation.getPropertyPath().toString();\n String errorMessage = violation.getMessage();\n errors.put(fieldName, errorMessage);\n });\n return new ResponseEntity<>(errors, HttpStatus.BAD_REQUEST);\n }\n}<\/pre>\n\n\n\n\u3053\u306e\u5b9f\u88c5\u306b\u3088\u308a\u3001\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306b\u8a73\u7d30\u306a\u30a8\u30e9\u30fc\u60c5\u5831\u304c\u8fd4\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
\u30d1\u30b9\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u30af\u30a8\u30ea\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3<\/h3>\n\n\n\n
\u30d1\u30b9\u30d1\u30e9\u30e1\u30fc\u30bf\u3084\u30af\u30a8\u30ea\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3082\u91cd\u8981\u3067\u3059\u3002\u3053\u308c\u3089\u306f@PathVariable<\/code>\u3068@RequestParam<\/code>\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u3066\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n@GetMapping(\"\/users\/{id}\")\npublic ResponseEntity<UserDTO> getUser(\n @PathVariable @Min(1) Long id,\n @RequestParam @Email String email) {\n \/\/ \u30e6\u30fc\u30b6\u30fc\u53d6\u5f97\u30ed\u30b8\u30c3\u30af\n return ResponseEntity.ok(new UserDTO());\n}<\/pre>\n\n\n\n\u3053\u306e\u5834\u5408\u3001\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30a8\u30e9\u30fc\u306fConstraintViolationException<\/code>\u3068\u3057\u3066\u30b9\u30ed\u30fc\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u9762\u3067\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306e\u91cd\u8981\u6027<\/h3>\n\n\n\n
\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306f\u5358\u306a\u308b\u30c7\u30fc\u30bf\u6574\u5408\u6027\u306e\u78ba\u4fdd\u3060\u3051\u3067\u306a\u304f\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u3068\u3057\u3066\u3082\u91cd\u8981\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u70b9\u306b\u7279\u306b\u6ce8\u610f\u3092\u6255\u3046\u3079\u304d\u3067\u3059\uff1a<\/p>\n\n\n\n
<\/i><\/span>\u6ce8\u610f<\/div><\/div>\n\n- \u5165\u529b\u30c7\u30fc\u30bf\u306e\u30b5\u30cb\u30bf\u30a4\u30ba: XSS\u306a\u3069\u306e\u653b\u6483\u3092\u9632\u3050\u305f\u3081\u3001\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u306f\u5e38\u306b\u30a8\u30b9\u30b1\u30fc\u30d7\u307e\u305f\u306f\u30b5\u30cb\u30bf\u30a4\u30ba\u3059\u308b\u3002<\/li>\n\n\n\n
- \u30b5\u30a4\u30ba\u5236\u9650: \u5927\u91cf\u306e\u30c7\u30fc\u30bf\u9001\u4fe1\u306b\u3088\u308b\u653b\u6483\u3092\u9632\u3050\u305f\u3081\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u30dc\u30c7\u30a3\u306e\u30b5\u30a4\u30ba\u306b\u5236\u9650\u3092\u8a2d\u3051\u308b\u3002<\/li>\n\n\n\n
- \u30ec\u30fc\u30c8\u5236\u9650: API\u306e\u904e\u5270\u306a\u4f7f\u7528\u3092\u9632\u3050\u305f\u3081\u3001\u30ec\u30fc\u30c8\u5236\u9650\u3092\u5b9f\u88c5\u3059\u308b\u3002<\/li>\n<\/ol>\n<\/div><\/div><\/div>\n\n\n\n
\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u8003\u616e\u4e8b\u9805<\/h3>\n\n\n\n
\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306fAPI\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u70b9\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\uff1a<\/p>\n\n\n\n
<\/i><\/span>\u6ce8\u610f<\/div><\/div>\n\n- \u5fc5\u8981\u6700\u5c0f\u9650\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3: \u904e\u5270\u306a\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306f\u907f\u3051\u3001\u5fc5\u8981\u306a\u30c1\u30a7\u30c3\u30af\u306e\u307f\u3092\u5b9f\u88c5\u3059\u308b\u3002<\/li>\n\n\n\n
- \u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u6d3b\u7528: \u983b\u7e41\u306b\u4f7f\u7528\u3055\u308c\u308b\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u7d50\u679c\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3059\u308b\u3053\u3068\u3067\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u3002<\/li>\n\n\n\n
- \u975e\u540c\u671f\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3: \u91cd\u3044\u51e6\u7406\u304c\u5fc5\u8981\u306a\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306f\u3001\u975e\u540c\u671f\u3067\u5b9f\u884c\u3059\u308b\u3053\u3068\u3092\u691c\u8a0e\u3059\u308b\u3002<\/li>\n<\/ol>\n<\/div><\/div><\/div>\n\n\n\n
RESTful API\u306b\u304a\u3051\u308bSpring Validation\u306e\u9069\u5207\u306a\u5b9f\u88c5\u306f\u3001API\u306e\u54c1\u8cea\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3001\u304a\u3088\u3073\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u306e\u5411\u4e0a\u306b\u5927\u304d\u304f\u5bc4\u4e0e\u3057\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001Spring Validation\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
5. Spring Validation\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/h2>\n\n\n\n
Spring Validation\u306f\u5f37\u529b\u306a\u6a5f\u80fd\u3092\u63d0\u4f9b\u3057\u307e\u3059\u304c\u3001\u9069\u5207\u306b\u4f7f\u7528\u3057\u306a\u3044\u3068\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001Spring Validation\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6700\u9069\u5316\u3059\u308b\u305f\u3081\u306e\u69d8\u3005\u306a\u6280\u6cd5\u3068\u6226\u7565\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
5.1 \u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u51e6\u7406\u306e\u52b9\u7387\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n\n- \u65e9\u671f\u30ea\u30bf\u30fc\u30f3<\/strong>: \u6700\u3082\u4e00\u822c\u7684\u306a\u30a8\u30e9\u30fc\u3092\u5148\u306b\u691c\u8a3c\u3057\u3001\u7121\u52b9\u306a\u5165\u529b\u3092\u65e9\u671f\u306b\u62d2\u5426\u3059\u308b\u3053\u3068\u3067\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n
public boolean isValid(String input, ConstraintValidatorContext context) {\n if (input == null || input.isEmpty()) {\n return false;\n }\n \/\/ \u305d\u306e\u4ed6\u306e\u8907\u96d1\u306a\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\n}<\/pre>\n\n\n\n\n- \u8efd\u91cf\u306a\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306e\u512a\u5148<\/strong>: \u8a08\u7b97\u30b3\u30b9\u30c8\u306e\u4f4e\u3044\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u5148\u306b\u5b9f\u884c\u3057\u3001\u91cd\u3044\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306f\u5fc5\u8981\u306a\u5834\u5408\u306e\u307f\u884c\u3044\u307e\u3059\u3002<\/li>\n\n\n\n
- \u30ab\u30b9\u30bf\u30e0\u30d0\u30ea\u30c7\u30fc\u30bf\u306e\u6700\u9069\u5316<\/strong>: \u8907\u96d1\u306a\u30ed\u30b8\u30c3\u30af\u3092\u542b\u3080\u30ab\u30b9\u30bf\u30e0\u30d0\u30ea\u30c7\u30fc\u30bf\u306f\u3001\u52b9\u7387\u7684\u306a\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u4f7f\u7528\u3057\u3066\u5b9f\u88c5\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n
public class OptimizedEmailValidator implements ConstraintValidator<ValidEmail, String> {\n private static final Pattern EMAIL_PATTERN = Pattern.compile(\"^[A-Z0-9._%+-]+@[A-Z0-9.-]+\\\\.[A-Z]{2,6}$\", Pattern.CASE_INSENSITIVE);\n\n @Override\n public boolean isValid(String email, ConstraintValidatorContext context) {\n return email != null && EMAIL_PATTERN.matcher(email).matches();\n }\n}<\/pre>\n\n\n\n