控制对象元素的排列顺序

需求在上一篇博客，如上篇所做后会产生对象转完列表后，列表中每项的顺序是按abc排序的。 举例：{c:1,b:2,a:3},我希望转成的list是[{key:c,vul:1},{key:b,vul:2},{key:a,vul:1}]，每行一个输出的话也要1,2,3。但现在转完按默认排序输出为3,2,1.

解决：

@JSONField(ordinal = 1) private String orgName; @JSONField(ordinal = 1) private String devCode; @JSONField(ordinal = 3) private String devName; @JSONField(ordinal = 4) private String alarmInfo; @JSONField(ordinal = 5) private String startTime;

加入@JSONField标签来决定你对象输出元素的顺序。

或：

@JSONType(orders={"name","age","gender","height","weight"}) public class Person { private String name; private Integer age; private String gender; private Double height; private Double weight; }

添加@JSONType标签。 注意的是你json解析成对象时他还是默认顺序abc。但是输出的时候会按你制定的顺序。

如：mPlansBean为上边定义的类

try { String s1 = JSON.toJSONString(mPlansBean, SerializerFeature.WriteNullStringAsEmpty, SerializerFeature.WriteNullNumberAsZero); JSONObject obj = new JSONObject(s1); Iterator it = obj.keys(); String vol = "";//值 String key = null;//键 while (it.hasNext()) {//遍历JSONObject key = (String) it.next().toString(); vol = obj.getString(key); mList.add(new SplitDetail(key, vol)); } mAdapter = new SplitAdapter(mList, getActivity(), "stock_detail"); mLvDetail.setAdapter(mAdapter); } catch (JSONException e) { e.printStackTrace(); } catch (org.json.JSONException e) { e.printStackTrace(); } ``