idea中简化代码插件（lombok偷懒神器）

lombok插件的使用（简化Java代码）

1. 先安装插件

2. 导入lombok包。如果使用maven构建项目直接在pom.xml中导入下面依赖即可

<!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <version>1.18.20</version>
    <scope>provided</scope>
</dependency>

3. 使用：直接在类的上面加注解以@Data为例

import lombok.Data;

@Data
public class People {
    private int id;
    private String username;
    private int age;
}

​ 可以看到类的结构中多了很多东西。就是注解的作用

4. 其他注解(官网)

   @NonNull

   or: How I learned to stop worrying and love the NullPointerException.

   @Cleanup

   Automatic resource management: Call your close() methods safely with no hassle.

   @Getter/@Setter

   Never write public int getFoo() {return foo;} again.

   @ToString

   No need to start a debugger to see your fields: Just let lombok generate a toString for you!

   @EqualsAndHashCode

   Equality made easy: Generates hashCode and equals implementations from the fields of your object..

   @NoArgsConstructor, @RequiredArgsConstructor and @AllArgsConstructor

   Constructors made to order: Generates constructors that take no arguments, one argument per final / non-nullfield, or one argument for every field.

   @Data

   All together now: A shortcut for @ToString, @EqualsAndHashCode, @Getter on all fields, and @Setter on all non-final fields, and @RequiredArgsConstructor!

   @Value

   Immutable classes made very easy.

   @Builder

   ... and Bob's your uncle: No-hassle fancy-pants APIs for object creation!

   @SneakyThrows

   To boldly throw checked exceptions where no one has thrown them before!

   @Synchronized

   synchronized done right: Don't expose your locks.

   @With

   Immutable 'setters' - methods that create a clone but with one changed field.

   @Getter(lazy=true)

   Laziness is a virtue!

   @Log

   Captain's Log, stardate 24435.7: "What was that line again?"

   experimental

   Head to the lab: The new stuff we're working on.

   5. 缺点

• 代码可读性降低
• 不支持构造器的重载
• 非结构性减轻开发任务。