在Jackson中将空值序列化为零的简单方法

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.12.4</version>
</dependency>

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.databind.ObjectMapper;

@JsonInclude(JsonInclude.Include.NON_NULL)
public class MyClass {
    private String field1;
    private Integer field2;
    // other fields and methods
}

ObjectMapper objectMapper = new ObjectMapper();
MyClass myObject = new MyClass();
String jsonString = objectMapper.writeValueAsString(myObject);