通信--前台篇

android

　　客户端拿到json数据后需要将其还原为对象,有两种解析方法

1 JsonObject方式

   /**
     * 解析json字符串
     * @param json
     * @return
     */
    private List<Person> parseJson(String json){
        try {
            JSONObject object = new JSONObject(json );
            List<Person> persons = new ArrayList<>();
            int result = object.getInt("result");
            if(result ==1){
                JSONArray personData = object.getJSONArray("personData");
                for(int i=0; i<personData.length(); i++){
                    Person person = new Person();
                    JSONObject personObject = personData.getJSONObject(i);
                    String name = (String) personObject.get("name");
                    String age = personObject.getString("age");
                    String url = personObject.getString("url");
                    person.setName(name);
                    person.setAge(age);
                    person.setUrl(url);
                    List<SchoolInfo> schoolInfosList = new ArrayList<>();
                    JSONArray schoolInfos = personObject.getJSONArray("schoolInfos");
                    for(int j=0; j<schoolInfos.length(); j++){
                        JSONObject school = schoolInfos.getJSONObject(i);
                        String schoolName = school.getString("school_name");
                        SchoolInfo info = new SchoolInfo();
                        info.setSchool_name(schoolName);
                        schoolInfosList.add(info);
                    }
                    person.setSchoolInfos(schoolInfosList);
                    persons.add(person);
                }
                return persons;
            }else {
                Toast.makeText(context, "error,can't get data", Toast.LENGTH_SHORT).show();
            }
        } catch (JSONException e) {
            e.printStackTrace();
        }
        return null;
    }

2 GSON方式

   /**
     * 解析json字符串
     * @param json
     * @return
     */
    private List<Person> parseJson(String json){
        Gson gson = new Gson();
        Result data1 = gson.fromJson(sb.toString(),Result.class);
        return List<Person>list = data1.getPersonData();
    }

　　由此可见，GSON方式是十分方便的，更推荐使用此种方式解析Json。需要导入GSON.jar请参考通信--后台篇