Question

我使用intent extra将一个json数组作为字符串从一个活动到另一个活动。如何在java中的json数组中的某个位置插入一个值。这是我正在使用的json数组。

{"result":[{"itembarcode":"BRMS","weight":"10","gross_wt":"1","stone_amt":"0","stone_wt":"","rate":"32000","making":"100","qty":"1","net_rate":"32100.0","item_total":"32100.0","sum_total":"64600.0"},
{"itembarcode":"MSAA0015","weight":"10","gross_wt":"11","stone_amt":"100000","stone_wt":"","rate":"32000","making":"500","qty":"1","net_rate":"32500.0","item_total":"32500.0","sum_total":"64600.0"}]}

我想在这个数组中插入一个类似

的doc_no

   {"result":[{"doc_no":"IN1001","itembarcode":"BRMS","weight":"10","gross_wt":"1","stone_amt":"0","stone_wt":"","rate":"32000","making":"100","qty":"1","net_rate":"32100.0","item_total":"32100.0","sum_total":"64600.0"},
    {"doc_no":"IN1001","itembarcode":"MSAA0015","weight":"10","gross_wt":"11","stone_amt":"100000","stone_wt":"","rate":"32000","making":"500","qty":"1","net_rate":"32500.0","item_total":"32500.0","sum_total":"64600.0"}]}

我尝试过这样的事情

 try {
            JSONArray jr = new JSONArray(json);
            for (int j=0;j<tot_length; j++)
            {
                JSONObject jb = jr.getJSONObject(j);
                String docnumber = "IN1001";
                jb.put("doc_no",docnumber);
            }
            Log.d("NEW JSON",json);
        } catch (JSONException e) {
            e.printStackTrace();
        }

但它对我不起作用。任何帮助或建议表示赞赏。谢谢。

Answer 1

JSONObject不支持管理排序..所以你需要使用像GSON

这样的库

我使用GSON做了这个..

试试

 try {
        JSONObject jsonObject = new JSONObject(yourJsonString);
        JSONArray jsonArray = jsonObject.getJSONArray("result"); 
        for(int i=0;i<jsonArray.length();i++){
            LinkedHashMap<String,String> linkedHashMap = new LinkedHashMap<>();
            JSONObject innerJosonObject = new JSONObject(jsonArray.getString(i));

            // you need to put all values from jsonObject to map for managing the order.. 

            linkedHashMap.put("doc_no","Custom Value");
            linkedHashMap.put("itembarcode",innerJosonObject.getString("itembarcode"));
            linkedHashMap.put("weight",innerJosonObject.getString("weight"));
            linkedHashMap.put("gross_wt", innerJosonObject.getString("gross_wt"));
            //..................... rest of others......
            linkedHashMap.put("sum_total",innerJosonObject.getString("sum_total"));
            Gson gson = new Gson();
            // convert linkedHashMap to json string and it will keep the insertion order..
            String string = gson.toJson(linkedHashMap,LinkedHashMap.class);
            jsonArray.put(i,string);
        }
        jsonObject.put("result",jsonArray);
        Log.e("json",jsonObject.toString());
       // this prints jsonArray only [............]
        Log.e("json_array", jsonArray.toString());


    }catch (Exception e){

    }




 Output:`{"result":["{\"doc_no\":\"Custom Value\",\"itembarcode\":\"BRMS\",\"weight\":\"10\",\"gross_wt\":\"1\",\"sum_total\":\"64600.0\"}",
                    "{\"doc_no\":\"Custom Value\",\"itembarcode\":\"MSAA0015\",\"weight\":\"10\",\"gross_wt\":\"11\",\"sum_total\":\"64600.0\"}"]}`

将此添加到gradle文件

 dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])    
    compile 'com.google.code.gson:gson:2.3.1'
    compile 'com.android.support:appcompat-v7:22.2.1'
    }

希望它有所帮助..谢谢

Answer 2

您需要在数组中再次存储已更改的jsonObject 试试这段代码

CODE

   try {
        JSONArray jsonArray = new JSONArray();
        JSONObject jsonObject1 = new JSONObject(
                "{  \r\n         \"itembarcode\":\"BRMS\",\r\n         \"weight\":\"10\",\r\n         \"gross_wt\":\"1\",\r\n         \"stone_amt\":\"0\",\r\n         \"s\u200C\u200Btone_wt\":\"\",\r\n         \"rate\":\"32000\",\r\n         \"making\":\"100\",\r\n         \"qty\":\"1\",\r\n         \"net_rate\":\"32100.0\",\r\n         \"item_to\u200C\u200Btal\":\"32100.0\",\r\n         \"sum_total\":\"64600.0\"\r\n      }");
        JSONObject jsonObject2 = new JSONObject(
                "{  \r\n         \"itembarcode\":\"MSAA0015\",\r\n         \"weight\":\"10\",\r\n         \"gross_wt\":\"11\",\r\n         \"stone_amt\":\"100000\",\r\n         \"st\u200C\u200Bone_wt\":\"\",\r\n         \"rate\":\"32000\",\r\n         \"making\":\"500\",\r\n         \"qty\":\"1\",\r\n         \"net_rate\":\"32500.0\",\r\n         \"item_tot\u200C\u200Bal\":\"32500.0\",\r\n         \"sum_total\":\"64600.0\"\r\n      }");
        jsonArray.put(jsonObject1);
        jsonArray.put(jsonObject2);
        JSONObject finalObject = new JSONObject();
        finalObject.put("result", jsonArray);
        System.out.println("Old----->" + finalObject);
        for (int i = 0; i < jsonArray.length(); i++) {
            JSONObject json = jsonArray.getJSONObject(i);
            json.put("doc_no", "IN1001");
            jsonArray.put(i, json);
            finalObject.put("result", jsonArray);
        }
        System.out.println("New----->" + finalObject);
    } catch (Exception e) {
        e.printStackTrace();
    }

输出

Old----->{"result":[{"sum_total":"64600.0","making":"100","stone_amt":"0","rate":"32000","qty":"1","weight":"10","net_rate":"32100.0","gross_wt":"1","item_to\u200c\u200btal":"32100.0","s\u200c\u200btone_wt":"","itembarcode":"BRMS"},{"sum_total":"64600.0","making":"500","stone_amt":"100000","item_tot\u200c\u200bal":"32500.0","rate":"32000","qty":"1","st\u200c\u200bone_wt":"","weight":"10","net_rate":"32500.0","gross_wt":"11","itembarcode":"MSAA0015"}]}
New----->{"result":[{"sum_total":"64600.0","making":"100","stone_amt":"0","rate":"32000","qty":"1","doc_no":"IN1001","weight":"10","net_rate":"32100.0","gross_wt":"1","item_to\u200c\u200btal":"32100.0","s\u200c\u200btone_wt":"","itembarcode":"BRMS"},{"sum_total":"64600.0","making":"500","stone_amt":"100000","item_tot\u200c\u200bal":"32500.0","rate":"32000","qty":"1","doc_no":"IN1001","st\u200c\u200bone_wt":"","weight":"10","net_rate":"32500.0","gross_wt":"11","itembarcode":"MSAA0015"}]}

编辑我没有意识到还有一个jsonObject：）

将值插入到java中特定位置的json数组中？

2 个答案:

CODE

输出