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Document Khmer Version Spring Annotation πŸ‡°πŸ‡­

This repo is tell you about spring annotation and definite of annotation

Contributor

  • Samrach
========================================================================

@Annotations

@RestController

αž”αŸ’αžšαžΎαžŸαž˜αŸ’αžšαžΆαž”αŸ‹ αž€αŸ†αžŽαžαŸ‹αžαžΆ class αž˜αž½αž™αžŽαžΆαžŠαŸ‚αž›αž‡αžΆ controller class αž¬αž€αŸ†αžŽαžαŸ‹αž‘αžΈαžαžΆαŸ†αž„αžŠαžΎαž˜αŸ’αž”αžΈ αžŸαŸ’αž‚αžΆαž›αŸ‹ controller

@RequestMapping("api/")

αžŸαž˜αŸ’αžšαžΆαž”αŸ‹ Request rout αž‘αŸ… endpoint αžŽαžΆαž˜αž½αž™

@MappedSuperclass

αž”αŸ’αžšαžΎαžŸαž˜αŸ’αžšαžΆαž”αŸ‹αž…αŸ‚αž€fields αž˜αžΆαž“αž“αŸαž™αžαžΆ αž™αžΎαž„αž˜αžΆαž“ class αž˜αž½αž™αž‡αžΆαž˜αŸ ឬentity αž˜αž½αž™αž‡αžΆαž˜αŸ αžŸαž˜αŸ’αžšαžΆαž”αŸ‹αž…αŸ‚αž€ fields αžŠαŸ‚αž›αž˜αžΆαž“αž“αŸ…αž€αŸ’αž“αž»αž„ Base Entity αž‘αŸ…αž€αžΆαž“αŸ‹ Entity αž€αžΌαž“αŸ—

@Table(name = β€œ ”)

αžŸαž˜αŸ’αžšαžΆαž”αŸ‹αžŠαžΆαž€αŸ‹αžˆαŸ’αž˜αŸ„αŸ‡αž‘αŸ…αž²αŸ’αž™ Table αž€αŸ’αž“αž»αž„ DatabaseαŸ” αž™αžΎαž„αž’αžΆαž… αž€αŸ†αžŽαžαŸ‹αžˆαŸ’αž˜αŸ„αŸ‡ Table αž€αŸ’αž“αž»αž„ Database αž”αžΆαž“ αžŠαŸ„αž™αž‚αŸ’αžšαžΆαž“αŸ‹αžαŸ‚αž€αŸ†αžŽαžαŸ‹αžαžΆαž˜ @Table(name = "sample_name")αŸ”

@Entity(name = β€œ ”)

αž”αŸ’αžšαžΎαžŸαž˜αŸ’αžšαžΆαž”αŸ‹αž€αŸ†αžŽαžαŸ‹ Object Class αž˜αž½αž™αžŽαžΆαžŠαŸ‚αž›αž‡αžΆ Entity αž αžΎαž™αž”αž„αŸ’αž€αžΎαž Table αž“αŸ…αž€αŸ’αž“αž»αž„ Database αžŠαžΌαž…αž‚αŸ’αž“αžΆαŸ” αžŸαž˜αŸ’αžšαžΆαž”αŸ‹αž€αžΆαžšαž€αŸ†αžŽαžαŸ‹ name αž€αŸ’αž“αž»αž„ @Entity(name = "sample_name") αž˜αžΆαž“αž“αŸαž™αžαžΆ αž€αŸ†αžŽαžαŸ‹αžˆαŸ’αž˜αŸ„αŸ‡αž‘αŸ…αž²αŸ’αž™ Entity αžŠαŸ‚αž›αž™αž€αž”αŸ’αžšαžΎαž€αŸ’αž“αž»αž„ JPQL QueriesαŸ” αž€αžšαžŽαžΈαž˜αž·αž“αž”αžΆαž“αž€αŸ†αžŽαžαŸ‹αžˆαŸ’αž˜αŸ„αŸ‡ αž‚αžΊαžœαžΆαž™αž€αžˆαŸ’αž˜αŸ„αŸ‡ Default αž…αŸαž‰αž–αžΈ Class αžαŸ‚αž˜αŸ’αžŠαž„αŸ”

@ManyToMany

αžŸαž˜αŸ’αžšαžΆαž”αŸ‹ αž…αž„relationship, FetchType.LAZY αžŸαž˜αŸ’αžšαžΆαž”αŸ‹αž‘αžΆαž‰ entity αž˜αž€αž αžΎαž™αž™αžΎαž„αž…αž„αŸ‹αž‘αžΆαž‰ row αžŠαŸ‚αž›αž“αŸ…αž€αŸ’αž“αž»αž„ entity αž“αŸ„αŸ‡αž˜αž€αž’αžαŸ‹, αž˜αžΆαž“αž“αŸαž™αžαžΆ αž”αžΎαž‚αŸαž’αžαŸ‹αž αŸ… FetchType.LAZY αž˜αž€αž”αŸ’αžšαžΎαž‘αŸ αž‚αžΊαž’αžαŸ‹αž‘αžΆαž‰ data αž˜αž€αž‘αŸ

@Basic

αžŸαž˜αŸ’αžšαžΆαž”αŸ‹ default column αž“αŸ…αž€αŸ’αž“αž»αž„ Entity dbαŸ” Ex: column id αž˜αžΆαž“data type αž‡αžΆlong αž’αž‰αŸ’αž…αžΉαž„ default αžœαžΆαž‚αžΊ 64, data type αž‡αžΆ String αž’αž‰αŸ’αž…αžΉαž„ default αžœαžΆαž‚αžΊ 255 αžαž½αž’αž€αŸ’αžŸαžš

@Id

αžŸαž˜αŸ’αžšαžΆαž”αŸ‹αž€αŸ†αžŽαžαŸ‹αžαžΆ Column αž αŸ’αž“αžΉαž„αž‡αžΆ id

@GeneratedValue

αžŸαž˜αŸ’αžšαžΆαž”αŸ‹αž€αŸ†αžŽαžαŸ‹αž€αžΆαžš Generate Type ID αž‘αŸ…αž‡αžΆ auto ID(auto αž›αŸαž αž¬αž›αŸαžαž’αžαŸ‹αžαžΆαž˜αž›αŸ†αžŠαžΆαž”αŸ‹) αž¬αž‘αŸ…αž‡αžΆ ID IDENTITY(αžšαžαŸ‹αžαžΆαž˜αž›αŸ†αžŠαžΆαž”αŸ‹αž›αŸαž)

@Column

αžŸαž˜αŸ’αžšαžΆαž”αŸ‹αž€αŸ†αžŽαžαŸ‹ attribute ឬcolumn αž“αŸ…αž€αŸ’αž“αž»αž„ Database αžαžΆαž’αžΆαž… null αž”αžΆαž“αž’αžαŸ‹? αž€αŸ†αžŽαžαŸ‹ length αž”αžΆαž“αž”αŸ‰αž»αž“αŸ’αž˜αžΆαž“ αž€αŸ†αžŽαžαŸ‹ unique ថអ column αž˜αž½αž™αž αŸ’αž“αžΉαž„αž‡αžΆ optional αž¬αž€αŸ unique

@NoRepositoryBean

αž‚αžΊαž˜αž·αž“αž²αŸ’αž™αž”αž„αŸ’αž€αžΎαž Bean αžαŸ’αž˜αžΈ

@Repository

αžŸαž˜αŸ’αžšαžΆαž”αŸ‹αž€αŸ†αžŽαžαŸ‹ αžαžΆαžœαžΆαž‡αžΆαž”αŸ’αžšαž—αŸαž‘ component αžŠαŸ‚αž›αž’αŸ’αžœαžΎαž€αžΆαžšαž‘αŸ…αž›αžΎ repository αŸ” αž αžΎαž™αžαŸ’αžšαžΌαžœ Extend αž…αŸαž‰αž–αžΈ JpaRepository αž˜αž½αž™αž‘αŸ€αžαž‘αžΎαž”αžŠαŸ†αžŽαžΎαžšαž€αžΆαžšαž”αžΆαž“ Ex: CategoryRepository: JpaRespository (αž…αŸ†αžŽαžΆαŸ† ) αž”αžΎ type αž‡αžΆ Long αžαŸ’αžšαžΌαžœαžŠαžΆαž€αŸ‹ Long αž”αžΎαž‡αžΆ String αžαŸ’αžšαžΌαžœαžŠαžΆαž€αŸ‹ String…

@Transient

αž€αž»αŸ†αž²αŸ’αž™ data αžšαž”αžŸαŸ‹ variable or function calculate វអ store αž“αŸ…αž€αŸ’αž“αž»αž„ db

@RestController

αžŸαž˜αŸ’αžšαžΆαž”αŸ‹αž€αŸ†αžŽαžαŸ‹αžαžΆ αžœαžΆαž‡αžΆαž”αŸ’αžšαž—αŸαž‘ Controller αž αžΎαž™αž”αž„αŸ’αž€αžΎαžαž‡αžΆ API αž‘αŸ€αž

@RequestMapping(β€œ/”)

αžŸαž˜αŸ’αžšαžΆαž”αŸ‹αž”αž‰αŸ’αž‡αžΆαž€αŸ‹αžαžΆ αž²αŸ’αž™αžœαžΆαžŸαŸ’αžαž·αžαž“αŸ… endpoint αžŽαžΆαž˜αž½αž™

@GetMapping

αžŸαž˜αŸ’αžšαžΆαž”αŸ‹αž‘αŸ… get αž¬αž…αžΌαž›αž‘αŸ… endpoint αžŽαžΆαž˜αž½αž™αžŠαŸ‚αž›αž™αžΎαž„αž…αž„αŸ‹ get αŸ” αž αžΎαž™ @GetMapping αž™αžΎαž„αž’αžΆαž…αžŠαžΆαž€αŸ‹ rout αž”αž“αŸ’αžαž”αžΆαž“αž‘αŸ€αž Ex: @GetMapping(β€œ/get”)

@Service

αžŸαž˜αŸ’αžšαžΆαž”αŸ‹αž€αŸ†αžŽαžαŸ‹αžαžΆ class interface αž˜αž½αž™αž αŸ’αž“αžΉαž„αž‡αžΆ service

@Autowired

αžŸαž˜αŸ’αžšαžΆαž”αŸ‹ inject dependencies αž™αž€αž˜αž€αž”αŸ’αžšαžΎαž”αžΆαŸ’αžšαžŸαŸ‹

@PostMapping

αžŸαž˜αŸ’αžšαžΆαž”αŸ‹ αž”αž‰αŸ’αž‡αž½αž“αž¬ post αž‘αŸ…αž€αžΆαž“αŸ‹ endpoint ឬrout αžŽαžΆαž˜αž½αž™

@RequestBody

αžŸαž˜αŸ’αžšαžΆαž”αŸ‹ αžŸαŸ’αž“αžΎαžŸαž»αŸ† ឬrequest αž‘αž·αž“αŸ’αž“αž“αŸαž™αžŽαžΆαžŠαŸ‚αž›αž™αžΎαž„ αž…αž„αŸ‹αž”αž„αŸ’αž€αžΎαžαžŠαžΎαž˜αŸ’αž”αžΈαž²αŸ’αž™ user αž’αžΆαž…αž”αž‰αŸ’αž…αžΌαž›αž‘αž·αž“αŸ’αž“αž“αŸαž™αž”αžΆαž“

@JsonInclude(JsonInclude.Include.NON_NULL)

αž”αžΎαžŸαž·αž“αž‡αžΆ Field page វអ Null αž…αžΉαž„ @JsonInclude αž’αžαŸ‹αž²αŸ’αž™ Properties αž…αŸαž‰αž˜αž€αž‘αŸ, αž‘αžΆαž›αŸ‹αžαŸ‚αžœαžΆαž’αžαŸ‹ null αž”αžΆαž“αž²αŸ’αž™αž…αŸαž‰αž˜αž€

@JsonIgnore

hide data αž˜αž·αž“αž…αž„αŸ‹αž”αž„αŸ’αž αžΆαž‰ client αžƒαžΎαž‰αŸ” Ex: αžŠαžΌαž…αž‡αžΆ password, date of birth, etc

@Transactional

αž”αŸ’αžšαžΎαžŸαž˜αŸ’αžšαžΆαž”αŸ‹ αž€αžΆαžšαž’αŸ’αžœαžΎαž”αŸ’αžšαžαž·αž”αžαŸ’αžαž·αž€αžΆαžšαž’αŸ’αžœαžΈαž˜αž½αž™ αžŠαŸ„αž™αž€αŸ’αž“αž»αž„αž”αŸ’αžšαžαž·αž”αžαŸ’αžαž·αž€αžΆαžšαž“αŸ„αŸ‡αž˜αžΆαž“ Process ្ ឬ αž…αŸ’αžšαžΎαž“αž‡αžΆαž„αž“αŸαŸ‡ Process αž‘αžΈαŸ‘ update table user, αž“αž·αž„ process αž‘αžΈαŸ’ update table invoice αž’αž‰αŸ’αž…αžΉαž„ αž’αžΆαž–αžΈαžš process αž“αŸαŸ‡ αž”αžΎαž˜αž½αž™αžŽαžΆ update αž˜αž·αž“ success αž‘αŸ αžœαžΆαž“αž·αž„ role back αž˜αž€αžœαž·αž‰αž‘αžΆαŸ†αž„αž’αžŸαŸ‹, αžœαžΆαž’αžαŸ‹ update αž˜αž½αž™ αž αžΎαž™αž˜αž½αž™αž‘αŸ€αž αž’αžαŸ‹ update αž‘αŸ αž“αž·αž™αžΆαž™αž‘αŸ…αžŠαžΌαž…αžˆαŸ’αž“αžΆαž”αŸ‹ AND αžŠαŸ‚αžš αž”αžΎαžœαžΆαž–αž·αžαžαŸ’αžšαžΌαžœαž–αž·αžαž‘αžΆαŸ†αž„αž’αžŸαŸ‹αŸ”

@Component Annotation

αž‚αžΊαž‡αžΆαž˜αŸ αž–αž–αž½αž€ (@Repository, @Service, @Controller)

@Controller Annotation

@Configuration Annotation

αžŸαž˜αŸ’αžšαžΆαž”αŸ‹ αž²αŸ’αž™ spring boot αž‡αžΆαž’αŸ’αž“αž€αž’αŸ’αžœαžΎαž€αžΆαžš configure αž‡αŸ†αž“αž½αžŸαžŠαŸ„αž™αž‚αŸ’αžšαžΆαž“αŸ‹αžαŸ‚ αžŠαžΆαž€αŸ‹ annotation αž˜αž½αž™αž“αŸαŸ‡ αž“αŸ…αž›αžΎ class config

@Ordered Annotation

αžŸαž˜αŸ’αžšαžΆαž”αŸ‹αž”αŸ’αžšαžΎαž“αŸ…αž›αžΎαž–αž–αž½αž€ component αž¬αž€αŸ bean αžŠαžΎαž˜αŸ’αž”αžΈαž’αŸ’αžœαžΎαž€αžΆαžš sort αž“αŸ…αž–αŸαž›αž”αŸ’αžšαž€αžΆαžŸαŸ‹αž–αž–αž½αž€ class αž‘αžΆαŸ†αž„αž“αŸ„αŸ‡ αž˜αžΆαž“αž“αŸαž™αžαžΆ αž“αŸ…αž–αŸαž›αžŠαŸ‚αž› start-up application @Ordered αžœαžΆαž‡αžΆαž’αŸ’αž“αž€αž’αŸ’αžœαžΎαž€αžΆαžšαžαž˜αŸ’αžšαŸ€αž”αžαžΆαžαžΎ class αžŽαžΆαž”αž„αŸ’αž€αžΎαžαž˜αž»αž“ αž αžΎαž™ class αžŽαžΆαž”αž„αŸ’αž€αžΎαžαž”αž“αŸ’αžαž”αž“αŸ’αž‘αžΆαž”αŸ‹

@Lazy Annotation

αžŸαž˜αŸ’αžšαžΆαž”αŸ‹αž”αŸ’αžšαžΎαž“αŸ…αž›αžΎ bean, configuration ឬ component class (αž–αž–αž½αž€αž˜αŸ class)αŸ” αž“αŸ…αž–αŸαž›αžŠαŸ‚αž› application start-up running ឬ αž…αžΆαž”αŸ‹αž•αŸ’αžŠαžΎαž˜ run project, class αžŠαŸ‚αž›αž”αžΆαž“αžŠαžΆαž€αŸ‹ @Lazy αž‚αžΊαž˜αž·αž“αžαŸ’αžšαžΌαžœαž”αžΆαž“ initialize αž‘αŸ αž¬αž˜αž·αž“αžαŸ’αžšαžΌαžœαž”αŸ’αžšαž€αžΆαžŸαž˜αž»αž“αž”αŸ’αžšαžΎαž”αŸ’αžšαžΆαžŸαŸ‹αž“αŸ„αŸ‡αž‘αŸαŸ” αžœαžΆαž…αžΆαž”αŸ‹αž•αŸ’αžŠαžΎαž˜ αž”αž„αŸ’αž€αžΎαž ឬ initialize αž“αŸ…αž–αŸαž›αžŠαŸ‚αž›αž™αžΎαž„αž αŸ… class αžŠαŸ‚αž›αž˜αžΆαž“ @Lazy αž‘αŸ…αž”αŸ’αžšαžΎαž”αŸ’αžšαžΆαžŸαŸ‹αŸ”

@JsonIgnoreProperties(ignoreUnknown = true)

αž”αŸ’αžšαžΎαžŸαž˜αŸ’αžšαžΆαž”αŸ‹αžαžΆαž§αž‘αžΆαž αžšαžŽαŸαž–αŸαž›αž™αžΎαž„ object αž“αžΉαž„αž…αžΌαž› database αž§αž”αž˜αžΆαžšαžαžΆ save αž…αžΌαž›αž˜αžΆαž“ field id, name αž’αžΈαž…αžΉαž„αž‘αŸ… αž αžΎαž™αžŸαŸ’αžšαžΆαž”αŸ‹αžαŸ‚αž›αžΎαž€αž€αŸ’αžšαŸ„αž™αž™αžΎαž„αžαŸ‚αž˜ sex αž˜αž½αž™αž‘αŸ€αž αž…αžΉαž„αž”αžΎαž™αžΎαž„αž”αŸ’αžšαžΎ jsonIgnoreproperties αž“αžΉαž„αž‚αžΉαžœαžΆαž’αžαŸ‹ error αž’αžΈαž‘αŸ αžαŸ‚αž”αžΎαž’αžαŸ‹αž”αŸ’αžšαžΎ αžœαžΆαž“αžΉαž„ error αžαžΆαžœαžΆαžšαž€ field sex αž‘αž·αž“αŸ’αž“αž“αŸαž™αž…αžΆαžŸαŸ‹αŸ—αž’αžαŸ‹αžƒαžΎαž‰ αž…αžΉαž„αžœαžΆαžαž˜αŸ’αžšαžΌαžœαž²αŸ’αž™αž™αžΎαž„αž‘αŸ…αžŠαžΆαž€αŸ‹ field sex αž“αŸ…αž‚αŸ’αžšαž”αŸ‹αž‘αž·αž“αŸ’αž“αž“αŸαž™αž…αžΆαžŸαŸ‹αŸ—αž‘αžΆαŸ†αž„αž’αžŸαŸ‹αŸ”

@ComponentScan Annotation

αž—αžΆαž‚αž…αŸ’αžšαžΎαž“ αž”αŸ’αžšαžΎαž“αŸ…αž€αž“αŸ’αž›αŸ‚αž„ config file αžŠαŸ‚αž›αž™αžΎαž„αž…αž„αŸ‹αž²αŸ’αž™αžœαžΆ scan αž“αžΌαžœ package αžŽαžΆαž˜αž½αž™ (αž’αžΆαž…αžŠαžΆαž€αŸ‹ αžˆαŸ’αž˜αŸ„αŸ‡αž‡αžΆ package αž€αŸαž”αžΆαž“ αž¬αž‡αžΆαžˆαŸ’αž˜αŸ„αŸ‡ class αž€αŸαž”αžΆαž“ αž αžΎαž™αž’αžΆαž… αž”αŸ’αžšαžΎαž”αžΆαž“αž‡αžΆ multiple αž”αžΆαž“αž‘αŸ€αž) Example in java code:

@Bean Annotation

αžŸαž˜αŸ’αžšαžΆαž”αŸ‹ αžŠαžΆαž€αŸ‹αž“αŸ…αž›αžΎ function ណអ αžŠαŸ‚αž›αž™αžΎαž„αž…αž„αŸ‹αž²αŸ’αž™αžœαžΆαž€αŸ’αž›αžΆαž™αž‘αŸ…αž‡αžΆ bean, Bean αž˜αžΆαž“αž“αŸαž™αžαžΆ object αž˜αž½αž™αžŠαŸ‚αž›αž™αžΎαž„αž™αž€αž˜αž€αž”αŸ’αžšαž€αžΆαžŸαŸ‹αž‡αžΆ public αžŠαŸ‚αž›αž“αŸ…αž€αŸ’αž“αž»αž„ project αž‘αžΆαŸ†αž„αž˜αžΌαž› αž€αž“αŸ’αž›αŸ‚αž„αžŽαžΆαž€αŸαž’αžΆαž… αž αŸ…αž”αŸ’αžšαžΎαžœαžΆαž”αžΆαž“αžŠαŸ‚αžš αž αžΎαž™αžœαžΆαž”αŸ’αžšαž€αžΆαžŸαŸ‹ αžαŸ‚αž˜αŸ’αžŠαž„αž‘αŸ (Singleton)

@Qualifier Annotation

αž˜αžΆαž“αž“αŸαž™αžαžΆ αž“αŸ…αž–αŸαž›αž˜αžΆαž“ αž”αŸ’αžšαž—αŸαž‘ Bean αž›αžΎαžŸαž–αžΈαž˜αž½αž™αžŠαŸ‚αž› Bean αž“αŸ„αŸ‡αžœαžΆαž‡αžΆ αž”αŸ’αžšαž—αŸαž‘αžŠαžΌαž…αž‚αŸ’αž“αžΆ ឬ Bean αžαŸ‚αž˜αž½αž™αž“αŸ…αž€αŸ’αž“αž»αž„ Spring Applicaton Context αž™αžΎαž„αžαŸ’αžšαžΌαžœαž”αŸ’αžšαžΎαž”αŸ’αžšαžΆαžŸαŸ‹ qualifier αžŠαžΎαž˜αŸ’αž”αžΈαž”αž‰αŸ’αž‡αžΆαž€αŸ‹ αžˆαŸ’αž˜αŸ„αŸ‡αž•αŸ’αžŸαŸαž„αž‚αŸ’αž“αžΆ αž˜αžΆαž“αž“αŸαž™αžαžΆ αž˜αžΆαž“ Bean αž–αžΈαžš αž•αŸ’αžŸαŸαž„αž‚αŸ’αž“αžΆ αžŠαŸ‚αž› Bean αž“αŸ„αŸ‡αž‡αžΆαž”αŸ’αžšαž—αŸαž‘αžαŸ‚αž˜αž½αž™
Example Code:

public class UserService {
    private final UserRepository userRepository;

    public UserService(@Qualifier("userRepositoryImpl1") UserRepository userRepository) {
        this.userRepository = userRepository;
    }

}

@Test Annotation

αž”αŸ’αžšαžΎαž”αŸ’αžšαžΆαžŸαŸ‹αž“αŸ…αž›αžΎ Function αžŽαžΆαžŠαŸ‚αž›αž™αžΎαž„αž…αž„αŸ‹ Test
Example Code:

@Test
void givenPerson_whenSerializing_thenIdFieldIgnored()
  throws JsonProcessingException {

    Person person = new Person(1L, "My First Name", "My Last Name");
    String result = new ObjectMapper().writeValueAsString(person);

    assertThat(result, containsString("firstName"));
    assertThat(result, containsString("lastName"));
    assertThat(result, not(containsString("id")));
}

@JsonIgnore Annotation

αž”αŸ’αžšαžΎαž”αŸ’αžšαžΆαžŸαŸ‹αž“αŸ…αž›αžΎ fields αžŠαŸ‚αž›αž™αžΎαž„αž˜αž·αž“αž…αž„αŸ‹ αž²αŸ’αž™αžœαžΆαž…αžΌαž›αž‘αŸ…αž€αŸ’αž“αž»αž„ Json αžšαžœαžΆαž„ Json αž“αž·αž„ JavaαŸ” αž™αžΎαž„αž”αŸ’αžšαžΎαžœαžΆ αžŠαžΎαž˜αŸ’αž”αžΈ serializing or deserializing αžšαžœαžΆαž„ java object αž‘αŸ… JSON ឬ αž–αžΈ JSON αž‘αŸ… java object αžœαž·αž‰αŸ”
*Serializing αž“αž·αž„ Deserializing αž˜αžΆαž“αž“αŸαž™αžαžΆ αžœαžΆαž‡αžΆαž’αŸ’αž“αž€αž”αž€αž”αŸ’αžšαŸ‚αž–αžΈ java object αž‘αŸ… json ឬ αž–αžΈ json αž‘αŸ… java object αžœαž·αž‰αŸ”
Example Code:

class Student {
   public int id;
   @JsonIgnore
   public String systemId;
   public int rollNo;
   public String name;
   @JsonIgnore
   public String type;

   Student(int id, int rollNo, String systemId, String name, String type){
      this.id = id;
      this.systemId = systemId;
      this.rollNo = rollNo;
      this.name = name;
      this.type = type;
   }
}

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