Lombok之@ToString学习

最新推荐文章于 2025-05-30 10:10:25 发布

qinxun2008081

最新推荐文章于 2025-05-30 10:10:25 发布

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CC 4.0 BY-SA版权

文章标签：学习 java

本文链接：https://blog.youkuaiyun.com/qinxun2008081/article/details/130017963

文章展示了如何使用Lombok的@ToString注解来生成对象的toString方法，包括常规使用，调用父类的toString，省略字段名称，字段的包含和排除，以及修改打印的字段名称。这些示例帮助理解如何更方便地自定义对象的toString方法。

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1.常规使用

@Getter
@Setter
@ToString
public class Father {

    private String name;
    private Integer age;
}

@SpringBootTest
public class TestToString {

    @Test
    void test(){
        Father father = new Father();
        father.setName("张三");
        father.setAge(50);
        // 输出Father(name=张三, age=50)
        System.out.println(father);
    }
}

2.调用父类toString

设置callSuper=true

@Getter
@Setter
@ToString
public class Father {

    private String name;
    private Integer age;
}

@Getter
@Setter
@ToString(callSuper = true)
public class Child extends Father{

    private String grade;

}

@SpringBootTest
public class TestToString {

    @Test
    void test(){
        Child child = new Child();
        child.setName("张小小");
        child.setAge(20);
        child.setGrade("大一");
        // Child(super=Father(name=张小小, age=20), grade=大一)
        System.out.println(child);
    }
}

3.省略字段名称

设置 includeFieldNames = false

@Getter
@Setter
@ToString(includeFieldNames = false)
public class Father {

    private String name;
    private Integer age;
}

@SpringBootTest
public class TestToString {

    @Test
    void test1(){
        Father father = new Father();
        father.setName("张三");
        father.setAge(50);
        // 输出Father(张三, 50)
        System.out.println(father);
    }
}

4.字段的包含和排除

@Getter
@Setter
@ToString
public class Father {

    private String name;
    
    // 数据排除
    @ToString.Exclude
    private Integer age;
}

@SpringBootTest
public class TestToString {

    @Test
    void test1(){
        Father father = new Father();
        father.setName("张三");
        father.setAge(50);
        // 输出Father(name=张三)
        System.out.println(father);
    }
}

5.修改打印的字段名称

@Getter
@Setter
@ToString
public class Father {

    // 修改字段名称为fatherName
    @ToString.Include(name = "fatherName")
    private String name;

    private Integer age;
}

@SpringBootTest
public class TestToString {

    @Test
    void test1(){
        Father father = new Father();
        father.setName("张三");
        father.setAge(50);
        // 输出Father(fatherName=张三, age=50)
        System.out.println(father);
    }
}