Lombok中@Builder和@SuperBuilder注解的用法案例

 Person person1 = Person.builder()
            .name("张三")
            .age(20)
            .build();
    System.out.println(person1);                // Person(name=张三, age=20)
    System.out.println(Person.builder());       // Person.PersonBuilder(name=null, age=null)

Before:
  @Builder
  class Example<T> {
  	private T foo;
  	private final String bar;
  }
  
After:
  class Example<T> {
  	private T foo;
  	private final String bar;
  	
  	// 私有的全参数构造函数
  	private Example(T foo, String bar) {
  		this.foo = foo;
  		this.bar = bar;
  	}
  	
  	public static <T> ExampleBuilder<T> builder() {
  		return new ExampleBuilder<T>();
  	}
  	
  	public static class ExampleBuilder<T> {
  		private T foo;
  		private String bar;
  		
  		private ExampleBuilder() {}
  		
  		public ExampleBuilder foo(T foo) {
  			this.foo = foo;
  			return this;
  		}
  		
  		public ExampleBuilder bar(String bar) {
  			this.bar = bar;
  			return this;
  		}
  		
  		@java.lang.Override public String toString() {
  			return "ExampleBuilder(foo = " + foo + ", bar = " + bar + ")";
  		}
  		
  		public Example build() {
  			return new Example(foo, bar);
  		}
  	}
  }

@Target({TYPE, METHOD, CONSTRUCTOR})
@Retention(SOURCE)
public @interface Builder {

	@Target(FIELD)
	@Retention(SOURCE)
	public @interface Default {}

	String builderMethodName() default "builder";

	String buildMethodName() default "build";
	
	String builderClassName() default "";

	boolean toBuilder() default false;

	AccessLevel access() default lombok.AccessLevel.PUBLIC;

	String setterPrefix() default "";
	
	@Target({FIELD, PARAMETER})
	@Retention(SOURCE)
	public @interface ObtainVia {

		String field() default "";

		String method() default "";
		
		boolean isStatic() default false;
	}
}

@Singular("skill")
    private List<String> skillList;

@Builder.Default
    private String name = "zhangsan";

@SuperBuilder
public class Male extends Person{
}

@SuperBuilder
public class Person {
    @Builder.Default
    private String name = "zhangsan";

    private Integer age;

    @Singular("skillList")
    private List<String> skillList;
}

  Male man = Male.builder()
                .name("张三")
                .age(20)
                .build();
        
        Male man2 = man.toBuilder()
                .age(30)
                .build();

class Foo{
 protected int xyz1;
 .....
 protected String xyz7;
}

class Bar extends Foo{

}

@SuperBuilder
public class ParentClass {
    private final String a;
    private final String b;
}

@SuperBuilder
public class ChildClass extends ParentClass{
    private final String c;
}

ChildClass.builder().a("testA").b("testB").c("testC").build();