lombok

1.pom.xml

<!--    lombok-->
<dependency>
  <groupId>org.projectlombok</groupId>
  <artifactId>lombok</artifactId>
  <version>1.16.20</version>
  <scope>provided</scope>
</dependency>

2.@Data注解

实现@Getter, @Setter, @ToString, @EqualsAndHashCode and @RequiredArgsConstructor

@Data
public class Student {
    private Integer sid;
    private String name;
    private Integer age;
}