JSON解析小总结

痛定思痛。 2022-05-31 01:05 202阅读 0赞

转载：[http://blog.csdn.net/u011480946/article/details/53470421][http_blog.csdn.net_u011480946_article_details_53470421]  
数据格式： \{“name”:”zhangsanfeng”,”age”:3,”sex”:”nv”\}

protected User readJsonObject(String jsonData) {
    
        // 内置解析方法JSONObject
        User bean = null;
        try {
            JSONObject jsonObject = new JSONObject(jsonData);
    
            String xname = jsonObject.getString("name");
            int xage = jsonObject.getInt("age");
            String xsex = jsonObject.getString("sex");
    
            bean = new User(xname, xage, xsex);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return bean;
    }

JSON格式：  
\[  
\{“name”:”zhangsanfeng”,”age”:3,”sex”:”nv”\},  
\{“name”:”zhaobenshan”,”age”:2,”sex”:”renyao”\}  
\]

protected List<User> readJsonArray(String jsonData) {
            // 内置解析方法JSONObject
            List<User> users = new ArrayList<User>();
            try {
                JSONArray jsonArray = new JSONArray(jsonData);
    
                for (int i = 0; i < jsonArray.length(); i++) {
                    JSONObject jsonObject = jsonArray.getJSONObject(i);
    
                    String xname = jsonObject.getString("name");
                    int xage = jsonObject.getInt("age");
                    String xsex = jsonObject.getString("sex");
    
                    User user = new User(xname, xage, xsex);
    
                    users.add(user);
                }
    
            } catch (Exception e) {
                e.printStackTrace();
            }
            return users;
        }

JSON格式:  
\{  
“error\_code”: 0,  
“reason”: “查询成功!”,  
“result”: \{  
“future”: \[  
\{  
“date”: “20140804”,  
“temperature”: “28℃~36℃”,  
“weather”: “晴转多云”,  
“weather\_id”: \{  
“fa”: “00”,  
“fb”: “01”  
\},  
“week”: “星期一”,  
“wind”: “南风3-4级”  
\},  
\{  
“date”: “20140805”,  
“temperature”: “28℃~36℃”,  
“weather”: “晴转多云”,  
“weather\_id”: \{  
“fa”: “00”,  
“fb”: “01”  
\},  
“week”: “星期二”,  
“wind”: “东南风3-4级”  
\},  
\{  
“date”: “20140806”,  
“temperature”: “27℃~35℃”,  
“weather”: “晴转多云”,  
“weather\_id”: \{  
“fa”: “00”,  
“fb”: “01”  
\},  
“week”: “星期三”,  
“wind”: “东南风3-4级”  
\},  
\{  
“date”: “20140807”,  
“temperature”: “27℃~34℃”,  
“weather”: “多云”,  
“weather\_id”: \{  
“fa”: “01”,  
“fb”: “01”  
\},  
“week”: “星期四”,  
“wind”: “东南风3-4级”  
\},  
“resultcode”: “200”  
\}

protected List<Future> readJsonObjArr(String jsonData) {
            // 内置解析方法JSONObject
            List<Future> futures = new ArrayList<Future>();
            try {
                JSONObject jsonObject = new JSONObject(jsonData);
    
                JSONObject result = jsonObject.getJSONObject("result");
    
                JSONArray jsonArray = result.getJSONArray("future");
    
                for (int i = 0; i < jsonArray.length(); i++) {
                    JSONObject future = jsonArray.getJSONObject(i);
                    String xdate = future.getString("date");
                    String xtemperature = future.getString("temperature");
                    String xweather = future.getString("weather");
                    String xweek = future.getString("week");
                    String xwind = future.getString("wind");
    
                    Future f = new Future(xdate, xtemperature, xweather, xweek, xwind);
    
                    futures.add(f);
                }
    
            } catch (Exception e) {
                e.printStackTrace();
            }
            return futures;
        }

JSON格式：  
\{  
“cookie”: \{  
“originalMaxAge”: null,  
“expires”: null,  
“secure”: false,  
“httpOnly”: true,  
“path”: “/”  
\},  
“user”: \{  
“integralLevel”: 4,  
“integral”: “309.2”,  
“integralLimit”: “500”,  
“level”: “3”,  
“email”: null,  
“headSmallPic”: null,  
“headMediumPic”: null,  
“mobile”: “13402082180”,  
“name”: “shlt”,  
“nickname”: “shlt”,  
“passId”: “7328058863216”,  
“uSessionId”: “UDnid0000001517405981291BcxMw2YRFpN33Tc5OdgT78N7qqFeZbFu”,  
“uid”: “13289164”,  
“platinum”: 0,  
“crbt”: 1,  
“crbtMonthly”: 1,  
“vrbt”: 0,  
“miguTotal”: “227”,  
“rechargeUrl”: null,  
“musician”: 0,  
“vipInterest”: \{  
“opened”: \[\{  
“id”: 3,  
“purviewName”: “xe5xbdxa9xe9x93x83xe5x8cx85xe6x9cx88”,  
“purviewDepict”: “xe9xabx98xe6xb8x85xe5xbdxa9xe9x93x83xe5x85x8dxe8xb4xb9xe8xaexa2xe8xb4xadrn| DIYxe5xbdxa9xe9x93x83xe5x85x8dxe8xb4xb9xe4xbdxbfxe7x94xa8”,  
“hasOpened”: 1  
\}\],  
“noOpened”: \[\{  
“id”: 2,  
“purviewName”: “xe7x99xbdxe9x87x91xe4xbcx9axe5x91x98”,  
“purviewDepict”: “xe9xabx98xe6xb8x85xe3x80x81xe6x97xa0xe6x8dx9fxe6xadx8cxe6x9bxb2xe5x85x8dxe8xb4xb9xe4xb8x8bxe8xbdxbdrn| xe8xb6x85xe6xb8x85MVxe5x85x8dxe8xb4xb9xe8xa7x82xe7x9cx8brn|xe4xb8x93xe4xbaxabxe7x9bxb4xe6x92xadxe5x9cxbaxe6xacxa1xe3x80x81xe7x9bxb4xe6x92xadxe7x89xb9xe6x9dx83rn| xe7xa5xa8xe5x8axa1xe5x8dxa1xe3x80x81xe5x92xaaxe5x92x95xe5x88xb8xe5x85x8dxe8xb4xb9xe9xa2x86rn| xe7x9bxb4xe6x92xadxe4xbaxabxe5x85xa8xe7xa8x8bxe6x97xa0xe5xb9xbfxe5x91x8arn| xe7x9bxb4xe6x92xadxe4xbaxabxe5xbcxb9xe5xb9x95xe7x89xb9xe6x95x88”,  
“hasOpened”: 0  
\}\]  
\}  
\}  
\}  
解析得到json中uSessionId的值：

if (StringUtils.isNotBlank(json)) {
              JSONObject jsonObject = JSON.parseObject(json);
              String user = jsonObject.getString("user");
              if (StringUtils.isNotBlank(user)) {
                JSONObject jsonUser = JSON.parseObject(user);
                if (jsonUser != null) {
                  String uSessionId = jsonUser.getString("uSessionId");
                      }
                    } catch (Exception e) {
                      logger.error("定时统计同步贡献值积分到用户中心任务执行异常, obj=" + miguReportActivity);
                      continue;
                    }
                  }
                }
              }
            }

用工具对JSON解析  
1，对象

protected User readJsonObject(String jsonData) {
        // 内置解析方法JSONObject,ctrl+k
        User bean = null;
        bean = JsonUtil.parseJsonToBean(jsonData, User.class);
        return bean;
    }

2，数组

users = (List<User>) JsonUtil.parseJsonToList(jsonData, new TypeToken<List<User>>(){}.getType());

3，综合

protected List<Future> readJsonObjArr(String jsonData) {
        // 内置解析方法JSONObject
        List<Future> futures = new ArrayList<Future>();
    
        String result = JsonUtil.getFieldValue(jsonData, "result");
    
    
        String future = JsonUtil.getFieldValue(result, "future");
    
         JSONArray jsonArray;
        try {
            jsonArray = new JSONArray(future);
            for (int i = 0; i < jsonArray.length(); i++) {
                JSONObject jsonObject = jsonArray.getJSONObject(i);
    
                String xdate = jsonObject.getString("date");
                String xtemperature = jsonObject.getString("temperature");
                String xweather = jsonObject.getString("weather");
                String xweek = jsonObject.getString("week");
                String xwind = jsonObject.getString("wind");
    
                Future f = new Future(xdate, xtemperature, xweather, xweek, xwind);
    
                futures.add(f);
    
            }
        } catch (Exception e) {
    
            e.printStackTrace();
        }
    
        return futures;
    }

[http_blog.csdn.net_u011480946_article_details_53470421]: http://blog.csdn.net/u011480946/article/details/53470421