Boon - 從對映

ObjectMapper 類可以用於從對映生成 json 字串。

例項

以下例項使用 ObjectMapper 類從對映物件生成 JSON 字串。

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.boon.json.JsonFactory;
import org.boon.json.ObjectMapper;

public class BoonTester {
   public static void main(String args[]){
      ObjectMapper mapper = JsonFactory.create();      
      Map<String, String> student = new HashMap<>();
      student.put("Name", "Mahesh");
      student.put("RollNo", "21");
      
      Map<String, String> student1 = new HashMap<>();
      student1.put("Name", "Suresh");
      student1.put("RollNo", "22");
      
      List<Map<String,String>> studentList = new ArrayList<>();
      studentList.add(student);
      studentList.add(student1);
      
      Map<String, List> studentMap = new HashMap<String, List>();
      studentMap.put("students", studentList);
      
      String jsonString = mapper.writeValueAsString(studentMap);
      System.out.println(jsonString);
   }
}

輸出

當你執行上述程式碼時，你應該會看到如下輸出 −

{"students":[{"RollNo":"21","Name":"Mahesh"},{"RollNo":"22","Name":"Suresh"}]}