Application of Lombok in springboot project

Background analysis

In practice java All of the projects we created pojo Classes almost always add set/get/toString And so on , All logging related classes may need to create objects such as logs , These boilerplate codes have no technical content , It also affects the beauty of the code , At the same time, the repeated coding process will increase our workload . here Lombok emerge as the times require .

lombok brief introduction

summary

Lombok It's a third party Java library , It's automatically inserted into the editor and build tool ,Lombok Provides a useful set of comments , It is used to tell the compiler tools in the compilation process , In the process of compiling source code into bytecode , Add some quantity template code to bytecode .

Common annotation analysis

@Setter Used to generate setter Method , It doesn't contain final Modify properties .
@Getter Used to generate getter Method .
@ToString Used to add toString Method .
@EqualsAndHashCode Used to describe a class for , Generate hashCode and equals Method .
@NoArgsConstructor Used to generate parameterless constructors for described classes .
@AllArgsConstructor Used to generate a constructor for the described class that contains all the fields in the class .
@Data Used to generate setter/getter、equals、canEqual、hashCode、toString Method , If final attribute , Will not generate setter Method .
@Slf4J Used to add a log property object to the described class .

lombok install

idea Installation configuration in

First step : open idea Settings window for , find plugins menu , Search for lombok Installation , As shown in the figure :

The second step : Start annotation processing , As shown in the figure :

The third step : restart idea( Optional , yes , we have idea Version needs to be ).

lombok stay maven Application in project

First step : add to lombok rely on .
(http://mvnrepository.com This link can search for coordinates )

<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<scope>annotationProcessor</scope>
</dependency>

The second step : Apply on class lombok annotation .

@Data
@NoArgsConstructor
@AllArgsConstructor
public class Brand {
private Integer id;
private String name;
private String remark;
private Date createdTime;
}

The third step : Write unit test class detection Lombok Annotation application

@Slf4j
@SpringBootTest
public class GoodsTests{
@Test
void testGoods(){
Goods g=new Goods();
g.setId(100L);
g.setName("Lombok");
log.info("id The value of is {}",g.getId());
log.info("name The value of is {}",g.getName());
}
}

summary (Summary)

This section is mainly about lombok Did an analysis , install and configure , And combined with the actual project to explain lombok Application scenarios and specific application process of .