将分号附加到数组中的每个项目，将逗号附加到数组对象集，以形成一个字符串

Question

1. 我有一个 JSON 数组{"payment":[{"a":"11","b":"21","c":"34","d":"0"},{"a":"54","b":"66","c":"21","d":"76"},{"a":"34","b":"23","c":"43","d":"88"}]} ，我已经迭代数组中的每个项目以形成一个字符串。

2. 我试图丢弃数组中“d”等于 0（零）的数组对象。例如：{"a":"11","b":"21","c":"34","d":"0"}.

3. 我在每个项目之间添加了一个分号，并在每个数组对象中添加了一个逗号：{54;66;21;76,34;23;43;88}。

4. 但我需要这样的最终结果{"payment":"54;66;21;76,34;23;43;88"}：

代码：

public class TestJson {

public static void main(String[] args) {

    String jsonArray = "{\"payments\":[{\"a\":\"11\",\"b\":\"21\",\"c\":\"34\",\"d\":\"0\"},{\"a\":\"54\",\"b\":\"66\",\"c\":\"21\",\"d\":\"76\"},{\"a\":\"34\",\"b\":\"23\",\"c\":\"43\",\"d\":\"88\"}]}";

    JsonObject jsonObject2 = new Gson().fromJson(jsonArray, JsonObject.class);

    String key = "";

    JsonObject innerObj = new JsonObject();

    StringBuilder joinBuilder = new StringBuilder();

    JsonArray paymentsArray = jsonObject2.getAsJsonArray("payments");

    for (JsonElement jsonElement : paymentsArray) {

        Set<Entry<String, JsonElement>> elemEntry = ((JsonObject) jsonElement).entrySet();

        Iterator<Entry<String, JsonElement>> itr = elemEntry.iterator();

        String finalVal = "";

        String semiColon = "";

        while (itr.hasNext()) {

            Entry<String, JsonElement> entry = itr.next();

            key = entry.getKey();

            JsonPrimitive valuePrim = entry.getValue().getAsJsonPrimitive();

            if (valuePrim.isString()) {

                finalVal = valuePrim.getAsString();

            }

            joinBuilder.append(semiColon).append(finalVal);

            semiColon = ";";

        }

        joinBuilder.append(",");

    }

    innerObj.addProperty("payments", joinBuilder.toString());

    System.out.println(innerObj.toString());

}}

输出：{"payments":"11;21;34;0,54;66;21;76,34;23;43;88,"}

但我需要删除字符串末尾的逗号，如果“d”字段为 0，则丢弃整个数组对象。前任：{11;21;34;0}

Answer 1

我解决了这个问题。代码：public static void main(String[] args) {&nbsp; &nbsp; String jsonArray = "{\"payments\":[{\"a\":\"11\",\"b\":\"21\",\"c\":\"34\",\"d\":\"0\"},{\"a\":\"54\",\"b\":\"66\",\"c\":\"21\",\"d\":\"76\"},{\"a\":\"34\",\"b\":\"23\",\"c\":\"43\",\"d\":\"88\"}]}";&nbsp; &nbsp; JsonObject jsonObject2 = new Gson().fromJson(jsonArray, JsonObject.class);&nbsp; &nbsp; JsonObject innerObj = new JsonObject();&nbsp; &nbsp; StringBuilder joinBuilder = new StringBuilder();&nbsp; &nbsp; Map<String, String> testMap = new LinkedHashMap<String, String>();&nbsp; &nbsp; JsonArray paymentsArray = jsonObject2.getAsJsonArray("payments");&nbsp; &nbsp; for (JsonElement jsonElement : paymentsArray) {&nbsp; &nbsp; &nbsp; &nbsp; Set<Entry<String, JsonElement>> elemEntry = ((JsonObject) jsonElement).entrySet();&nbsp; &nbsp; &nbsp; &nbsp; Iterator<Entry<String, JsonElement>> itr = elemEntry.iterator();&nbsp; &nbsp; &nbsp; &nbsp; while (itr.hasNext()) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Entry<String, JsonElement> entry = itr.next();&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; testMap.put(entry.getKey(), entry.getValue().getAsString());&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; if (testMap.get("d").equals("0")) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; testMap.clear();&nbsp; &nbsp; &nbsp; &nbsp; } else {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; joinBuilder.append(StringUtils.join(testMap.values(), ';')).append(",");&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; }&nbsp; &nbsp; joinBuilder.deleteCharAt(joinBuilder.length() - 1);&nbsp; &nbsp; innerObj.addProperty("payments", joinBuilder.toString());&nbsp; &nbsp; System.out.println(innerObj.toString());}输出：{"payments":"54;66;21;76,34;23;43;88"}