Lombok common annotations

Chapter one lombok Commonly used annotations

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lombok Commonly used annotations

lombok rely on

<dependency>
  <groupId>org.projectlombok</groupId>
  <artifactId>lombok</artifactId>
  <version>1.16.18</version>
  <scope>provided</scope>
</dependency>

lombok annotation

• @Getter/@Setter: On the action class , Generate... For all member variables getter/setter Method ; Act on member variables , The getter/setter Method
• @ToString： Act on a class , Override the default toString() Method , Can pass of Properties restrict the display of certain fields , adopt exclude Properties exclude certain fields
• @EqualsAndHashCode： Act on a class , Override the default equals and hashCode
• @NonNull： It is mainly used in member variables and parameters , Logo cannot be empty , Otherwise, a null pointer exception is thrown
• @NoArgsConstructor, @RequiredArgsConstructor, @AllArgsConstructor： Act on a class , Used to generate constructors . Yes staticName、access Equal attribute ,staticName Once the property is set , The instance will be generated in a static way ,access Property to restrict access [email protected] Generate parameterless constructors ;@RequiredArgsConstructor Generation contains final and @NonNull Constructor of member variable of annotation ;@AllArgsConstructor Generate full parameter constructors
• @Data： Act on a class , Is a collection of the following annotations ：@ToString @EqualsAndHashCode @Getter @Setter @RequiredArgsConstructor
• @Builder： Act on a class , Turn classes into builder mode
• @Log： Act on a class , Generate log variables . Implement products for different logs , There are different notes , Such as @Slf4j、@Log4j2 etc.
• @Cleanup： Close resources automatically , For the realization of java.io.Closeable The object of the interface is valid , Such as ： Typical IO Stream object
• @SneakyThrows： You can catch the detected exception and throw
• @Synchronized： Act on method level , Can replace synchronize Keywords or lock lock