Jackson Annotations 简明教程
Jackson Annotations - @JsonFormat
@JsonFormat 用于在序列化或反序列化时指定格式。它主要用于日期字段。
Example - @JsonFormat
import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import com.fasterxml.jackson.annotation.JsonFormat;
import com.fasterxml.jackson.databind.ObjectMapper;
public class JacksonTester {
public static void main(String args[]) throws IOException, ParseException {
ObjectMapper mapper = new ObjectMapper();
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("dd-MM-yyyy");
Date date = simpleDateFormat.parse("20-12-1984");
Student student = new Student(1, date);
String jsonString = mapper
.writerWithDefaultPrettyPrinter()
.writeValueAsString(student);
System.out.println(jsonString);
}
}
class Student {
public int id;
@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "dd-MM-yyyy")
public Date birthDate;
Student(int id, Date birthDate){
this.id = id;
this.birthDate = birthDate;
}
}