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📜  Boon-生成日期

📅  最后修改于: 2020-11-18 09:07:17             🧑  作者: Mango

ObjectMapper类可用于在JSON中使用不同的日期格式。它也可以用于生成日期对象。默认情况下，ObjectMapper会生成长毫秒版本的Date。使用JsonFactory.createUseJSONDates()方法返回的ObjectMapper，我们可以在解析期间获取日期的字符串版本。

下面的示例使用ObjectMapper类通过解析JSON来生成Date字符串。

例

import java.util.Date;
import org.boon.json.JsonFactory;
import org.boon.json.ObjectMapper;

public class BoonTester {
   public static void main(String args[]) {
      ObjectMapper mapper = JsonFactory.createUseJSONDates();     
      String jsonString = "{\"name\":\"Mahesh\", \"age\":21, \"dateOfBirth\":\"1998-08-11T11:31:00.034Z\" }";
      
      //mapper converts String to date automatically
      Student student = mapper.readValue(jsonString, Student.class);
      System.out.println(student.dateOfBirth);    
      
      //Mapper converts date to date string now
      jsonString = mapper.writeValueAsString(student);
      System.out.println(jsonString);    
   }
}
class Student {
   public String name;
   public int age;
   public Date dateOfBirth;
   public Student(String name, int age, Date dateOfBirth) {
      this.name = name;
      this.age = age;
      this.dateOfBirth = dateOfBirth;
   }
}

输出

Tue Aug 11 17:01:00 IST 1998
{"name":"Mahesh","age":21,"dateOfBirth":"1998-08-11T11:31:00.034Z"}