@Data

原创于 2024-05-06 10:45:59 发布 · 331 阅读

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文章介绍了Java中Lombok库的数据注解(@Data)如何自动创建构造函数、getter、setter等方法，减少类的样板代码，使代码更简洁。但使用Lombok需要集成相应的IDE支持或Lombok插件。

The @Data annotation in Java typically comes from the Lombok library, which is used to automatically generate boilerplate code for Java classes, such as constructors, getters, setters, toString(), and equals() methods.

When you annotate a class with @Data, Lombok automatically generates these methods based on the fields present in the class.

Here's an example:

import lombok.Data;

@Data
public class MyClass {
    private String name;
    private int age;
}

With @Data annotation, Lombok will generate the following methods:

Constructors
Getters and Setters for name and age fields
toString() method
equals() and hashCode() methods

This reduces boilerplate code and makes your classes more concise. However, it's important to note that using Lombok requires appropriate IDE support or Lombok plugin installation to recognize and process these annotations during compilation.