📅  最后修改于: 2020-11-16 07:39:09             🧑  作者: Mango
@JsonInclude用于具有null / empty或默认值的排除属性。
import java.io.IOException;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.databind.ObjectMapper;
public class JacksonTester {
public static void main(String args[]){
ObjectMapper mapper = new ObjectMapper();
try {
Student student = new Student(1,null);
String jsonString = mapper
.writerWithDefaultPrettyPrinter()
.writeValueAsString(student);
System.out.println(jsonString);
}
catch (IOException e) {
e.printStackTrace();
}
}
}
@JsonInclude(JsonInclude.Include.NON_NULL)
class Student {
public int id;
public String name;
Student(int id,String name){
this.id = id;
this.name = name;
}
}
{
"id" : 1
}