Java创建（读取）比较复杂的JSON对象

使用Java创建比较复杂的JSON对象，代码如下：

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

public class testJSON {
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        HashMap<String, String> map;
        List<HashMap<String, String>> list = new ArrayList<HashMap<String, String>>();
        for (int i = 1; i < 4; i++) {
            map = new HashMap<String, String>();
            map.put("unique_id", "" + i);
            list.add(map);
        }
        testJSON test = new testJSON();
        test.readJSON(test.createJSON(list));
    }

    private JSONObject createJSON(List<HashMap<String, String>> list) {
        JSONObject object = new JSONObject();
        JSONArray array = new JSONArray();
        array = JSONArray.fromObject(list);

        object.put("patinent_id", "111111111");
        object.put("visit_id", 1);
        object.put("file", array);
        System.out.println("object's content----" + object.toString());
        return object;
    }

    private void readJSON(JSONObject object) {
        System.out.println("patinent_id------>"
                + object.getString("patinent_id"));
        System.out.println("visit_id------>" + object.getInt("visit_id"));
        JSONArray array = object.getJSONArray("file");
        System.out.println("These are unique_id:");
        for (int i = 0; i < array.size(); i++) {
            JSONObject arrObject = array.getJSONObject(i);
            System.out.println("unique_id is "
                    + arrObject.getString("unique_id"));
        }
    }

}

运行结果如下：