Lombok @Data\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306f\u3001Java\u30af\u30e9\u30b9\u306e\u5b9a\u578b\u7684\u306a\u30b3\u30fc\u30c9\u3092\u81ea\u52d5\u751f\u6210\u3059\u308b\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u3067\u3059\u3002\u3053\u306e\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u958b\u767a\u8005\u306f\u591a\u304f\u306e\u30dc\u30a4\u30e9\u30fc\u30d7\u30ec\u30fc\u30c8\u30b3\u30fc\u30c9\u306e\u8a18\u8ff0\u304b\u3089\u89e3\u653e\u3055\u308c\u3001\u3088\u308a\u672c\u8cea\u7684\u306a\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u306e\u5b9f\u88c5\u306b\u96c6\u4e2d\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u76ee\u6b21 <\/p>\n
@Data\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u304c\u81ea\u52d5\u7684\u306b\u751f\u6210\u3055\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n
@ToString<\/code>: \u30af\u30e9\u30b9\u306e\u6587\u5b57\u5217\u8868\u73fe\u3092\u751f\u6210<\/li>\n\n\n\n@EqualsAndHashCode<\/code>: equals()\u3068hashCode()\u30e1\u30bd\u30c3\u30c9\u3092\u751f\u6210<\/li>\n\n\n\n@Getter<\/code>: \u5168\u30d5\u30a3\u30fc\u30eb\u30c9\u306egetter\u30e1\u30bd\u30c3\u30c9\u3092\u751f\u6210<\/li>\n\n\n\n@Setter<\/code>: \u5168\u30d5\u30a3\u30fc\u30eb\u30c9\u306esetter\u30e1\u30bd\u30c3\u30c9\u3092\u751f\u6210<\/li>\n\n\n\n@RequiredArgsConstructor<\/code>: \u5fc5\u8981\u306a\u5f15\u6570\u3092\u6301\u3064\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u751f\u6210<\/li>\n<\/ul>\n\n\n\n\u5f93\u6765\u306eJava\u30b3\u30fc\u30c9\u3068\u306e\u6bd4\u8f03<\/h2>\n\n\n\n
\u4ee5\u4e0b\u306b\u3001\u5f93\u6765\u306eJava\u30b3\u30fc\u30c9\u3068Lombok @Data\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u305f\u5834\u5408\u306e\u6bd4\u8f03\u3092\u793a\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n
\u5f93\u6765\u306eJava\u30b3\u30fc\u30c9\uff1a<\/strong><\/p>\n\n\n\npublic class User {\n private Long id;\n private String username;\n private String email;\n\n \/\/ \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n public User(Long id, String username, String email) {\n this.id = id;\n this.username = username;\n this.email = email;\n }\n\n \/\/ Getter\n public Long getId() {\n return id;\n }\n\n public String getUsername() {\n return username;\n }\n\n public String getEmail() {\n return email;\n }\n\n \/\/ Setter\n public void setId(Long id) {\n this.id = id;\n }\n\n public void setUsername(String username) {\n this.username = username;\n }\n\n public void setEmail(String email) {\n this.email = email;\n }\n\n \/\/ equals()\n @Override\n public boolean equals(Object o) {\n if (this == o) return true;\n if (o == null || getClass() != o.getClass()) return false;\n User user = (User) o;\n return Objects.equals(id, user.id) &&\n Objects.equals(username, user.username) &&\n Objects.equals(email, user.email);\n }\n\n \/\/ hashCode()\n @Override\n public int hashCode() {\n return Objects.hash(id, username, email);\n }\n\n \/\/ toString()\n @Override\n public String toString() {\n return \"User{\" +\n \"id=\" + id +\n \", username='\" + username + '\\'' +\n \", email='\" + email + '\\'' +\n '}';\n }\n}<\/pre>\n\n\n\nLombok\u3092\u4f7f\u7528\u3057\u305f\u30b3\u30fc\u30c9\uff1a<\/strong><\/p>\n\n\n\nimport lombok.Data;\n\n@Data\npublic class User {\n private Long id;\n private String username;\n private String email;\n}<\/pre>\n\n\n\n\u3053\u306e\u6bd4\u8f03\u304b\u3089\u5206\u304b\u308b\u3088\u3046\u306b\u3001Lombok\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\uff1a<\/p>\n\n\n\n
\n- \u30b3\u30fc\u30c9\u91cf\u3092\u7d0490%\u524a\u6e1b<\/li>\n\n\n\n
- \u53ef\u8aad\u6027\u306e\u5927\u5e45\u306a\u5411\u4e0a<\/li>\n\n\n\n
- \u4fdd\u5b88\u6027\u306e\u5411\u4e0a<\/li>\n\n\n\n
- \u30d0\u30b0\u306e\u6df7\u5165\u30ea\u30b9\u30af\u306e\u4f4e\u6e1b<\/li>\n<\/ol>\n\n\n\n
\u304c\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u751f\u6210\u3055\u308c\u308b\u30b3\u30fc\u30c9\u306f\u3001\u5f93\u6765\u306e\u624b\u66f8\u304d\u306e\u30b3\u30fc\u30c9\u3068\u540c\u7b49\u306e\u6a5f\u80fd\u3092\u63d0\u4f9b\u3057\u306a\u304c\u3089\u3001\u3088\u308a\u7c21\u6f54\u3067\u7ba1\u7406\u3057\u3084\u3059\u3044\u5f62\u5f0f\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
@Data\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h1>\n\n\n\n\u5c0e\u5165\u624b\u9806\u3068\u74b0\u5883\u8a2d\u5b9a<\/h2>\n\n\n\n
Lombok\u3092\u5c0e\u5165\u3059\u308b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u624b\u9806\u306b\u5f93\u3063\u3066\u304f\u3060\u3055\u3044\uff1a<\/p>\n\n\n\n
\n- Maven\u306e\u5834\u5408<\/strong>\uff1a
pom.xml<\/code>\u306b\u4ee5\u4e0b\u306e\u4f9d\u5b58\u95a2\u4fc2\u3092\u8ffd\u52a0<\/li>\n<\/ol>\n\n\n\n<dependency>\n <groupId>org.projectlombok<\/groupId>\n <artifactId>lombok<\/artifactId>\n <version>1.18.30<\/version>\n <scope>provided<\/scope>\n<\/dependency><\/pre>\n\n\n\n\n- Gradle\u306e\u5834\u5408<\/strong>\uff1a
build.gradle<\/code>\u306b\u4ee5\u4e0b\u3092\u8ffd\u52a0<\/li>\n<\/ol>\n\n\n\ndependencies {\n compileOnly 'org.projectlombok:lombok:1.18.30'\n annotationProcessor 'org.projectlombok:lombok:1.18.30'\n}<\/pre>\n\n\n\n\n- IDE\u8a2d\u5b9a<\/strong>\uff1a\n
\n- IntelliJ IDEA: Lombok\u30d7\u30e9\u30b0\u30a4\u30f3\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb<\/li>\n\n\n\n
- Eclipse: lombok.jar\u3092\u5b9f\u884c\u3057\u3066\u8a2d\u5b9a\u3092\u6709\u52b9\u5316<\/li>\n\n\n\n
- VS Code: Java Extension Pack\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n
\u30b7\u30f3\u30d7\u30eb\u306a\u30af\u30e9\u30b9\u3078\u306e\u9069\u7528\u4f8b<\/h2>\n\n\n\n
\u57fa\u672c\u7684\u306a\u4f7f\u7528\u4f8b\u3068\u3057\u3066\u3001\u30e6\u30fc\u30b6\u30fc\u60c5\u5831\u3092\u7ba1\u7406\u3059\u308b\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3057\u3066\u307f\u307e\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n
import lombok.Data;\n\n@Data\npublic class Customer {\n private Long id;\n private String firstName;\n private String lastName;\n private String email;\n private LocalDate birthDate;\n\n \/\/ \u3053\u308c\u3060\u3051\u3067\u4ee5\u4e0b\u304c\u81ea\u52d5\u751f\u6210\u3055\u308c\u307e\u3059\uff1a\n \/\/ - \u5168\u30d5\u30a3\u30fc\u30eb\u30c9\u306egetter\/setter\n \/\/ - equals()\/hashCode()\n \/\/ - toString()\n \/\/ - \u5f15\u6570\u306a\u3057\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n}<\/pre>\n\n\n\n\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u8a2d\u5b9a\u65b9\u6cd5<\/h2>\n\n\n\n
@Data\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u52d5\u4f5c\u306f\u3001\u69d8\u3005\u306a\u30aa\u30d7\u30b7\u30e7\u30f3\u3067\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n
\n- \u7279\u5b9a\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u9664\u5916<\/strong><\/li>\n<\/ol>\n\n\n\n
@Data\npublic class Product {\n private Long id;\n private String name;\n\n @ToString.Exclude\n private String sensitiveData; \/\/ toString()\u304b\u3089\u9664\u5916\n\n @EqualsAndHashCode.Exclude\n private LocalDateTime lastUpdated; \/\/ equals\/hashCode\u304b\u3089\u9664\u5916\n}<\/pre>\n\n\n\n\n- \u9759\u7684\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u6271\u3044<\/strong><\/li>\n<\/ol>\n\n\n\n
@Data\n@ToString(staticName = \"of\") \/\/ \u9759\u7684\u30d5\u30a1\u30af\u30c8\u30ea\u30e1\u30bd\u30c3\u30c9\u306e\u751f\u6210\npublic class Configuration {\n private static final String VERSION = \"1.0\";\n private String environment;\n private Map<String, String> properties;\n}<\/pre>\n\n\n\n\n- \u30a2\u30af\u30bb\u30b9\u30ec\u30d9\u30eb\u306e\u5236\u5fa1<\/strong><\/li>\n<\/ol>\n\n\n\n
@Data\n@Getter(AccessLevel.PUBLIC) \/\/ getter\u306f\u5168\u3066public\n@Setter(AccessLevel.PROTECTED) \/\/ setter\u306f\u5168\u3066protected\npublic class SecureEntity {\n private String publicField;\n\n @Getter(AccessLevel.PRIVATE)\n private String sensitiveField; \/\/ \u3053\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306egetter\u306fprivate\n}<\/pre>\n\n\n\n\n- \u30ab\u30b9\u30bf\u30e0toString\u5b9f\u88c5<\/strong><\/li>\n<\/ol>\n\n\n\n
@Data\n@ToString(includeFieldNames = false) \/\/ \u30d5\u30a3\u30fc\u30eb\u30c9\u540d\u3092\u7701\u7565\npublic class Coordinate {\n private int x;\n private int y;\n \/\/ toString()\u306e\u51fa\u529b: \"Coordinate(10, 20)\"\n}<\/pre>\n\n\n\n\n- \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u30ab\u30b9\u30bf\u30de\u30a4\u30ba<\/strong><\/li>\n<\/ol>\n\n\n\n
@Data\n@AllArgsConstructor \/\/ \u5168\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u5f15\u6570\u306b\u6301\u3064\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n@NoArgsConstructor \/\/ \u5f15\u6570\u306a\u3057\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\npublic class Employee {\n private Long id;\n private String name;\n private Department department;\n}<\/pre>\n\n\n\n\u3053\u308c\u3089\u306e\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u30d3\u30b8\u30cd\u30b9\u8981\u4ef6\u306b\u6700\u9069\u5316\u3055\u308c\u305f\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002\u7279\u306b\u91cd\u8981\u306a\u70b9\u306f\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3084\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u8981\u4ef6\u306b\u5fdc\u3058\u3066\u3001\u9069\u5207\u306a\u30a2\u30af\u30bb\u30b9\u30ec\u30d9\u30eb\u3068\u9664\u5916\u8a2d\u5b9a\u3092\u884c\u3046\u3053\u3068\u3067\u3059\u3002<\/p>\n\n\n\n
\u306a\u304a\u3001\u30b3\u30fc\u30c9\u751f\u6210\u306e\u7d50\u679c\u306f\u3001IDE\u306eStructure\u30d3\u30e5\u30fc\uff08IntelliJ IDEA\uff09\u3084Outline\u30d3\u30e5\u30fc\uff08Eclipse\uff09\u3067\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u751f\u6210\u3055\u308c\u308b\u30af\u30e9\u30b9\u30d5\u30a1\u30a4\u30eb\u3092\u9006\u30b3\u30f3\u30d1\u30a4\u30eb\u3059\u308b\u3053\u3068\u3067\u3001\u5b9f\u969b\u306b\u751f\u6210\u3055\u308c\u305f\u30b3\u30fc\u30c9\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n
@Data\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u30e1\u30ea\u30c3\u30c8<\/h1>\n\n\n\n\u30b3\u30fc\u30c9\u91cf\u306e\u5927\u5e45\u306a\u524a\u6e1b<\/h2>\n\n\n\n
@Data\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u6700\u5927\u306e\u30e1\u30ea\u30c3\u30c8\u306f\u3001\u30b3\u30fc\u30c9\u91cf\u306e\u524a\u6e1b\u3067\u3059\uff1a<\/p>\n\n\n
\n\u6a5f\u80fd<\/th> \u901a\u5e38\u306eJava<\/th> Lombok\u4f7f\u7528\u6642<\/th> \u524a\u6e1b\u7387<\/th><\/tr><\/thead> Getter\/Setter<\/td> 12\u884c\/\u30d5\u30a3\u30fc\u30eb\u30c9<\/td> 1\u884c<\/td> \u7d0492%<\/td><\/tr> toString()<\/td> 10-15\u884c<\/td> 0\u884c<\/td> 100%<\/td><\/tr> equals()\/hashCode()<\/td> 20-30\u884c<\/td> 0\u884c<\/td> 100%<\/td><\/tr> \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf<\/td> 5-10\u884c<\/td> 0\u884c<\/td> 100%<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n\u4fdd\u5b88\u6027\u306e\u5411\u4e0a<\/h2>\n\n\n\n\n- \u30b3\u30fc\u30c9\u306e\u4e00\u8cab\u6027\u78ba\u4fdd<\/strong>\n
\n- \u81ea\u52d5\u751f\u6210\u306b\u3088\u308a\u3001\u5b9f\u88c5\u306e\u63fa\u308c\u3092\u9632\u6b62<\/li>\n\n\n\n
- \u30c1\u30fc\u30e0\u5168\u4f53\u3067\u7d71\u4e00\u3055\u308c\u305f\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3\u3092\u7dad\u6301<\/li>\n\n\n\n
- \u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u6642\u306e\u5909\u66f4\u7b87\u6240\u306e\u524a\u6e1b<\/li>\n<\/ul>\n<\/li>\n\n\n\n
- \u30d0\u30b0\u306e\u6df7\u5165\u30ea\u30b9\u30af\u4f4e\u6e1b<\/strong>\n
\n- \u4eba\u7684\u30df\u30b9\u306e\u6392\u9664<\/li>\n\n\n\n
- \u81ea\u52d5\u751f\u6210\u3055\u308c\u305f\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9<\/li>\n\n\n\n
- \u30c6\u30b9\u30c8\u5fc5\u8981\u7b87\u6240\u306e\u524a\u6e1b<\/li>\n<\/ul>\n<\/li>\n\n\n\n
- \u958b\u767a\u52b9\u7387\u306e\u5411\u4e0a<\/strong>\n
\n- \u30dc\u30a4\u30e9\u30fc\u30d7\u30ec\u30fc\u30c8\u30b3\u30fc\u30c9\u306e\u4f5c\u6210\u6642\u9593\u524a\u6e1b<\/li>\n\n\n\n
- \u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u306e\u52b9\u7387\u5316<\/li>\n\n\n\n
- IDE\u306e\u30b5\u30dd\u30fc\u30c8\u6a5f\u80fd\u3068\u306e\u9023\u643a<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n
\u30d0\u30b0\u306e\u9632\u6b62<\/h2>\n\n\n\n
@Data\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u4e00\u822c\u7684\u306a\u30d0\u30b0\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n
\n- equals()\u3068hashCode()\u306e\u4e0d\u6574\u5408<\/strong>\n
\n- \u30cf\u30c3\u30b7\u30e5\u30d9\u30fc\u30b9\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3067\u306e\u554f\u984c\u3092\u9632\u6b62<\/li>\n\n\n\n
- \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u540c\u4e00\u6027\u5224\u5b9a\u306e\u4e00\u8cab\u6027\u3092\u78ba\u4fdd<\/li>\n<\/ul>\n<\/li>\n\n\n\n
- null\u5b89\u5168\u6027\u306e\u5411\u4e0a<\/strong>\n
\n- \u9069\u5207\u306anull \u30c1\u30a7\u30c3\u30af\u306e\u5b9f\u88c5<\/li>\n\n\n\n
- NPE\u306e\u767a\u751f\u30ea\u30b9\u30af\u3092\u4f4e\u6e1b<\/li>\n<\/ul>\n<\/li>\n\n\n\n
- toString()\u306e\u5b9f\u88c5\u6f0f\u308c<\/strong>\n
\n- \u30c7\u30d0\u30c3\u30b0\u6642\u306e\u53ef\u8aad\u6027\u78ba\u4fdd<\/li>\n\n\n\n
- \u30ed\u30b0\u51fa\u529b\u306e\u54c1\u8cea\u5411\u4e0a<\/li>\n<\/ul>\n<\/li>\n\n\n\n
- Getter\/Setter\u306e\u5b9f\u88c5\u30df\u30b9<\/strong>\n
\n- \u30d5\u30a3\u30fc\u30eb\u30c9\u540d\u306e\u6253\u3061\u9593\u9055\u3044\u3092\u9632\u6b62<\/li>\n\n\n\n
- \u30a2\u30af\u30bb\u30b9\u5236\u5fa1\u306e\u4e00\u8cab\u6027\u3092\u78ba\u4fdd<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n
\u3053\u308c\u3089\u306e\u30e1\u30ea\u30c3\u30c8\u306b\u3088\u308a\u3001\u958b\u767a\u8005\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u672c\u8cea\u7684\u306a\u4f5c\u696d\u306b\u96c6\u4e2d\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n
\n- \u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u306e\u5b9f\u88c5<\/li>\n\n\n\n
- \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u8a2d\u8a08<\/li>\n\n\n\n
- \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u6700\u9069\u5316<\/li>\n\n\n\n
- \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56<\/li>\n<\/ul>\n\n\n\n
\u5b9f\u969b\u306e\u958b\u767a\u73fe\u5834\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u30e1\u30ea\u30c3\u30c8\u304c\u8907\u5408\u7684\u306b\u4f5c\u7528\u3057\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u5168\u4f53\u306e\u54c1\u8cea\u5411\u4e0a\u3068\u958b\u767a\u901f\u5ea6\u306e\u5411\u4e0a\u306b\u8ca2\u732e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
@Data\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u6ce8\u610f\u70b9\u3068\u5236\u9650\u4e8b\u9805<\/h1>\n\n\n\n\u4e0d\u5fc5\u8981\u306a\u30e1\u30bd\u30c3\u30c9\u751f\u6210\u306b\u3088\u308b\u5f71\u97ff<\/h2>\n\n\n\n
@Data\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306f\u5305\u62ec\u7684\u306a\u30b3\u30fc\u30c9\u751f\u6210\u3092\u884c\u3046\u305f\u3081\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u554f\u984c\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n
\n- \u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u5897\u52a0<\/strong><\/li>\n<\/ol>\n\n\n\n
@Data \/\/ \u5168\u3066\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u751f\u6210\u3055\u308c\u308b\npublic class LargeEntity {\n private String field1;\n private String field2;\n \/\/ ... \u591a\u6570\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\n}\n\n\/\/ \u63a8\u5968\u3055\u308c\u308b\u65b9\u6cd5\n@Getter \/\/ \u5fc5\u8981\u306a\u30e1\u30bd\u30c3\u30c9\u306e\u307f\u751f\u6210\n@ToString\npublic class OptimizedEntity {\n private String field1;\n private String field2;\n \/\/ ... \u591a\u6570\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\n}<\/pre>\n\n\n\n\n- \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3078\u306e\u5f71\u97ff<\/strong>\n
\n- \u4e0d\u8981\u306a\u30e1\u30bd\u30c3\u30c9\u306b\u3088\u308b\u30af\u30e9\u30b9\u30ed\u30fc\u30c9\u6642\u9593\u306e\u5897\u52a0<\/li>\n\n\n\n
- \u30e1\u30e2\u30ea\u30d5\u30c3\u30c8\u30d7\u30ea\u30f3\u30c8\u306e\u5897\u5927<\/li>\n\n\n\n
- \u6700\u9069\u5316\u306e\u6a5f\u4f1a\u306e\u6e1b\u5c11<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n
\u7d99\u627f\u6642\u306e\u6ce8\u610f\u70b9<\/h2>\n\n\n\n
\u7d99\u627f\u3092\u4f7f\u7528\u3059\u308b\u969b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u554f\u984c\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\uff1a<\/p>\n\n\n\n
\n- equals()\u3068hashCode()\u306e\u554f\u984c<\/strong><\/li>\n<\/ol>\n\n\n\n
@Data\npublic class Parent {\n private String parentField;\n}\n\n@Data\npublic class Child extends Parent {\n private String childField;\n \/\/ \u6ce8\u610f: \u89aa\u30af\u30e9\u30b9\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u6b63\u3057\u304f\u6bd4\u8f03\u3055\u308c\u306a\u3044\u53ef\u80fd\u6027\n}\n\n\/\/ \u63a8\u5968\u3055\u308c\u308b\u5b9f\u88c5\n@Data\n@EqualsAndHashCode(callSuper = true)\npublic class SafeChild extends Parent {\n private String childField;\n}<\/pre>\n\n\n\n\n- \u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u3068\u306e\u6574\u5408\u6027<\/strong><\/li>\n<\/ol>\n\n\n\n
public class BaseEntity {\n private Long id;\n \/\/ \u30ab\u30b9\u30bf\u30e0\u306eequals\u5b9f\u88c5\n}\n\n@Data \/\/ \u5371\u967a: \u89aa\u30af\u30e9\u30b9\u306e\u5b9f\u88c5\u3092\u4e0a\u66f8\u304d\u3059\u308b\npublic class DerivedEntity extends BaseEntity {\n private String name;\n}\n\n\/\/ \u5b89\u5168\u306a\u5b9f\u88c5\n@Getter\n@Setter\n@ToString\npublic class SafeDerivedEntity extends BaseEntity {\n private String name;\n}<\/pre>\n\n\n\n\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u306a\u30af\u30e9\u30b9\u3092\u4f5c\u308b\u969b\u306e\u5236\u7d04<\/h2>\n\n\n\n
\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u30af\u30e9\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u969b\u306e\u6ce8\u610f\u70b9\uff1a<\/p>\n\n\n\n
@Data \/\/ Setter\u304c\u751f\u6210\u3055\u308c\u3066\u3057\u307e\u3046\npublic class ImmutableUser {\n private final String username;\n private final String email;\n}\n\n\/\/ \u6b63\u3057\u3044\u5b9f\u88c5\n@Value \/\/ \u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u306a\u30af\u30e9\u30b9\u306b\u9069\u3057\u305f\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\npublic class SafeImmutableUser {\n String username;\n String email;\n}<\/pre>\n\n\n\n\u5faa\u74b0\u53c2\u7167\u306b\u304a\u3051\u308b\u554f\u984c<\/h2>\n\n\n\n
\u5faa\u74b0\u53c2\u7167\u304c\u3042\u308b\u5834\u5408\u306e\u554f\u984c\u3068\u89e3\u6c7a\u7b56\uff1a<\/p>\n\n\n\n
@Data\npublic class Department {\n private String name;\n private List<Employee> employees; \/\/ \u5faa\u74b0\u53c2\u7167\n}\n\n@Data\npublic class Employee {\n private String name;\n private Department department; \/\/ \u5faa\u74b0\u53c2\u7167\n\n \/\/ StackOverflowError\u306e\u53ef\u80fd\u6027\u3042\u308a\n}\n\n\/\/ \u89e3\u6c7a\u7b56\n@Data\npublic class Department {\n private String name;\n private List<Employee> employees;\n\n @ToString.Exclude \/\/ \u5faa\u74b0\u53c2\u7167\u3092\u9632\u3050\n private List<Employee> employees;\n}\n\n@Data\npublic class Employee {\n private String name;\n\n @ToString.Exclude \/\/ \u5faa\u74b0\u53c2\u7167\u3092\u9632\u3050\n private Department department;\n}<\/pre>\n\n\n\n\u30c6\u30b9\u30c8\u6642\u306e\u8003\u616e\u4e8b\u9805<\/h2>\n\n\n\n\n- \u30e2\u30c3\u30af\u5316\u306e\u554f\u984c<\/strong><\/li>\n<\/ol>\n\n\n\n
@Data\npublic class Service {\n private final Dependencies deps;\n \/\/ final\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u30e2\u30c3\u30af\u5316\u304c\u56f0\u96e3\n}\n\n\/\/ \u30c6\u30b9\u30c8\u5bb9\u6613\u306a\u8a2d\u8a08\n@Getter\n@AllArgsConstructor\npublic class TestableService {\n private Dependencies deps; \/\/ final\u3092\u9664\u53bb\n}<\/pre>\n\n\n\n\n- \u30c6\u30b9\u30c8\u30ab\u30d0\u30ec\u30c3\u30b8\u3078\u306e\u5f71\u97ff<\/strong>\n
\n- \u751f\u6210\u3055\u308c\u305f\u30b3\u30fc\u30c9\u306e\u30ab\u30d0\u30ec\u30c3\u30b8\u6e2c\u5b9a<\/li>\n\n\n\n
- \u30c6\u30b9\u30c8\u30b1\u30fc\u30b9\u8a2d\u8a08\u306e\u8907\u96d1\u5316<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n
\u5bfe\u7b56\uff1a<\/p>\n\n\n\n
\/\/ \u30c6\u30b9\u30c8\u7528\u306e\u8a2d\u5b9a\u4f8b\n@Data\n@Builder \/\/ \u30c6\u30b9\u30c8\u30c7\u30fc\u30bf\u4f5c\u6210\u3092\u5bb9\u6613\u306b\npublic class TestEntity {\n private String field1;\n private String field2;\n\n \/\/ \u30ab\u30b9\u30bf\u30e0\u306e\u691c\u8a3c\u30e1\u30bd\u30c3\u30c9\n public void validate() {\n if (field1 == null || field2 == null) {\n throw new ValidationException(\"Fields cannot be null\");\n }\n }\n}<\/pre>\n\n\n\n\n- \u30c7\u30d0\u30c3\u30b0\u306e\u8907\u96d1\u3055<\/strong>\n
\n- \u751f\u6210\u3055\u308c\u305f\u30b3\u30fc\u30c9\u306e\u30c7\u30d0\u30c3\u30b0\u304c\u56f0\u96e3<\/li>\n\n\n\n
- \u30b9\u30bf\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u304c\u5206\u304b\u308a\u306b\u304f\u3044<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n
\u3053\u308c\u3089\u306e\u554f\u984c\u3092\u56de\u907f\u3059\u308b\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\uff1a<\/p>\n\n\n\n
\n- \u5fc5\u8981\u6700\u5c0f\u9650\u306e\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u7528<\/li>\n\n\n\n
- \u7d99\u627f\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u306f\u7279\u306b\u6ce8\u610f<\/li>\n\n\n\n
- \u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u30af\u30e9\u30b9\u306b\u306f@Value\u3092\u4f7f\u7528<\/li>\n\n\n\n
- \u5faa\u74b0\u53c2\u7167\u306b\u306f\u9069\u5207\u306a\u9664\u5916\u8a2d\u5b9a\u3092\u4f7f\u7528<\/li>\n\n\n\n
- \u30c6\u30b9\u30c8\u5bb9\u6613\u6027\u3092\u8003\u616e\u3057\u305f\u8a2d\u8a08\u3092\u5fc3\u304c\u3051\u308b<\/li>\n<\/ul>\n\n\n\n
\u3053\u308c\u3089\u306e\u6ce8\u610f\u70b9\u3092\u7406\u89e3\u3057\u3001\u9069\u5207\u306b\u5bfe\u51e6\u3059\u308b\u3053\u3068\u3067\u3001@Data\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u5229\u70b9\u3092\u6700\u5927\u9650\u306b\u6d3b\u304b\u3057\u306a\u304c\u3089\u3001\u5b89\u5168\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
@Data\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h1>\n\n\n\n\u9069\u5207\u306a\u4f7f\u7528\u30b7\u30fc\u30f3<\/h2>\n\n\n\n
@Data\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u6700\u9069\u306a\u4f7f\u7528\u30b7\u30fc\u30f3\u3068\u3001\u907f\u3051\u308b\u3079\u304d\u30b7\u30fc\u30f3\u3092\u660e\u78ba\u306b\u7406\u89e3\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\uff1a<\/p>\n\n\n\n
\u63a8\u5968\u3055\u308c\u308b\u4f7f\u7528\u30b7\u30fc\u30f3\uff1a<\/strong><\/p>\n\n\n\n\n- DTO\u30af\u30e9\u30b9<\/strong><\/li>\n<\/ol>\n\n\n\n
@Data\npublic class UserDTO {\n private Long userId;\n private String username;\n private String email;\n \/\/ DTO\u306f\u30c7\u30fc\u30bf\u8ee2\u9001\u304c\u4e3b\u76ee\u7684\u306e\u305f\u3081@Data\u9069\u7528\u306b\u9069\u3057\u3066\u3044\u308b\n}<\/pre>\n\n\n\n\n- \u8a2d\u5b9a\u30af\u30e9\u30b9<\/strong><\/li>\n<\/ol>\n\n\n\n
@Data\n@Builder \/\/ Builder\u30d1\u30bf\u30fc\u30f3\u3068Data\u306e\u7d44\u307f\u5408\u308f\u305b\npublic class ApplicationConfig {\n private String apiKey;\n private Integer timeout;\n private String baseUrl;\n private Map<String, String> headers;\n}<\/pre>\n\n\n\n\u907f\u3051\u308b\u3079\u304d\u30b7\u30fc\u30f3\uff1a<\/strong><\/p>\n\n\n\n\n- \u30c9\u30e1\u30a4\u30f3\u30e2\u30c7\u30eb<\/strong><\/li>\n<\/ol>\n\n\n\n
\/\/ \u975e\u63a8\u5968\n@Data\npublic class User {\n private Long id;\n private String password; \/\/ \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u4e0a\u91cd\u8981\u306a\u30d5\u30a3\u30fc\u30eb\u30c9\n}\n\n\/\/ \u63a8\u5968\n@Getter\n@ToString(exclude = \"password\")\n@EqualsAndHashCode(exclude = \"password\")\npublic class User {\n private Long id;\n private String password;\n\n \/\/ \u30d1\u30b9\u30ef\u30fc\u30c9\u5909\u66f4\u306b\u306f\u5c02\u7528\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\n public void changePassword(String newPassword) {\n \/\/ \u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30ed\u30b8\u30c3\u30af\n this.password = newPassword;\n }\n}<\/pre>\n\n\n\n\u4ee3\u66ff\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u4f7f\u3044\u5206\u3051<\/h2>\n\n\n\n
\u72b6\u6cc1\u306b\u5fdc\u3058\u305f\u9069\u5207\u306a\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u9078\u629e\uff1a<\/p>\n\n\n
\n\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3<\/th> \u4f7f\u7528\u30b7\u30fc\u30f3<\/th> \u751f\u6210\u3055\u308c\u308b\u30b3\u30fc\u30c9<\/th><\/tr><\/thead> @Value<\/td> \u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u30af\u30e9\u30b9<\/td> getter, toString, equals\/hashCode<\/td><\/tr> @Builder<\/td> \u8907\u96d1\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u751f\u6210<\/td> \u30d3\u30eb\u30c0\u30fc\u30d1\u30bf\u30fc\u30f3\u5b9f\u88c5<\/td><\/tr> @Getter\/@Setter<\/td> \u9650\u5b9a\u7684\u306a\u30a2\u30af\u30bb\u30b9\u5236\u5fa1<\/td> \u500b\u5225\u306egetter\/setter<\/td><\/tr> @ToString<\/td> \u30ed\u30b0\u51fa\u529b\u7528<\/td> toString()\u306e\u307f<\/td><\/tr> @EqualsAndHashCode<\/td> \u6bd4\u8f03\u304c\u5fc5\u8981\u306a\u30af\u30e9\u30b9<\/td> equals()\u3068hashCode()<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n\u4f8b\u793a\uff1a<\/p>\n\n\n\n
\/\/ \u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u306a\u5024\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\n@Value\npublic class Money {\n BigDecimal amount;\n Currency currency;\n}\n\n\/\/ \u30d3\u30eb\u30c0\u30fc\u30d1\u30bf\u30fc\u30f3\u304c\u6709\u7528\u306a\u30b1\u30fc\u30b9\n@Builder\n@Getter\npublic class HttpRequest {\n private String url;\n private String method;\n private Map<String, String> headers;\n private String body;\n}\n\n\/\/ \u9650\u5b9a\u7684\u306a\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\u304c\u5fc5\u8981\u306a\u30b1\u30fc\u30b9\n@Getter\npublic class AuditLog {\n private final LocalDateTime timestamp;\n private final String action;\n private final String userId;\n}<\/pre>\n\n\n\n\u63a8\u5968\u3055\u308c\u308b\u8a2d\u8a08\u30d1\u30bf\u30fc\u30f3<\/h2>\n\n\n\n\n- \u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u30d1\u30bf\u30fc\u30f3<\/strong><\/li>\n<\/ol>\n\n\n\n
@Value\n@Builder\npublic class OrderDetails {\n Long orderId;\n BigDecimal amount;\n List<OrderItem> items;\n\n \/\/ \u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u306aList\u3092\u78ba\u4fdd\n public List<OrderItem> getItems() {\n return Collections.unmodifiableList(items);\n }\n}<\/pre>\n\n\n\n\n- \u30d5\u30a1\u30af\u30c8\u30ea\u30d1\u30bf\u30fc\u30f3\u3068\u306e\u7d44\u307f\u5408\u308f\u305b<\/strong><\/li>\n<\/ol>\n\n\n\n
@Value\npublic class Product {\n String id;\n String name;\n BigDecimal price;\n\n \/\/ \u30d5\u30a1\u30af\u30c8\u30ea\u30e1\u30bd\u30c3\u30c9\n public static Product createFreeProduct(String name) {\n return new Product(\"FREE_\" + UUID.randomUUID(), name, BigDecimal.ZERO);\n }\n}<\/pre>\n\n\n\n\n- \u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306e\u8ffd\u52a0<\/strong><\/li>\n<\/ol>\n\n\n\n
@Data\npublic class RegistrationForm {\n @NotNull\n private String username;\n\n @Email\n private String email;\n\n @Size(min = 8)\n private String password;\n\n \/\/ \u30ab\u30b9\u30bf\u30e0\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\n @AssertTrue\n private boolean isValid() {\n return username != null && !username.equals(password);\n }\n}<\/pre>\n\n\n\n\u3053\u308c\u3089\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3067\u3001@Data\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u5229\u70b9\u3092\u6700\u5927\u9650\u306b\u6d3b\u304b\u3057\u306a\u304c\u3089\u3001\u4fdd\u5b88\u6027\u304c\u9ad8\u304f\u3001\u5b89\u5168\u306a\u30b3\u30fc\u30c9\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u4f8b\u3068\u5fdc\u7528<\/h1>\n\n\n\nSpring Boot\u3068\u306e\u9023\u643a\u65b9\u6cd5<\/h2>\n\n\n\n
Spring Boot\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001@Data\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u52b9\u679c\u7684\u306b\u6d3b\u7528\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n
\n- \u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u30af\u30e9\u30b9\u3067\u306e\u5229\u7528<\/strong><\/li>\n<\/ol>\n\n\n\n
@Entity\n@Data\n@NoArgsConstructor\n@AllArgsConstructor\npublic class User {\n @Id\n @GeneratedValue(strategy = GenerationType.IDENTITY)\n private Long id;\n\n @Column(nullable = false)\n private String username;\n\n @Column(unique = true)\n private String email;\n\n @CreatedDate\n private LocalDateTime createdAt;\n\n @LastModifiedDate\n private LocalDateTime updatedAt;\n}<\/pre>\n\n\n\n\n- \u8a2d\u5b9a\u30d7\u30ed\u30d1\u30c6\u30a3\u30af\u30e9\u30b9<\/strong><\/li>\n<\/ol>\n\n\n\n
@Data\n@Configuration\n@ConfigurationProperties(prefix = \"app.mail\")\npublic class MailProperties {\n private String host;\n private int port;\n private String username;\n private String password;\n private boolean ssl = true;\n private Map<String, String> headers = new HashMap<>();\n}<\/pre>\n\n\n\n\n- \u30ec\u30b9\u30dd\u30f3\u30b9DTO\u306e\u4f5c\u6210<\/strong><\/li>\n<\/ol>\n\n\n\n