我有一個 JSON 數組{"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"}]} ，我已經迭代數組中的每個項目以形成一個字符串。我試圖丟棄數組中“d”等于 0（零）的數組對象。例如：{"a":"11","b":"21","c":"34","d":"0"}.我在每個項目之間添加了一個分號，并在每個數組對象中添加了一個逗號：{54;66;21;76,34;23;43;88}。但我需要這樣的最終結果{"payment":"54;66;21;76,34;23;43;88"}：代碼：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());}}輸出：{"payments":"11;21;34;0,54;66;21;76,34;23;43;88,"}但我需要刪除字符串末尾的逗號，如果“d”字段為 0，則丟棄整個數組對象。前任：{11;21;34;0}
1 回答
湖上湖
TA貢獻2003條經驗 獲得超2個贊
我解決了這個問題。
代碼：
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);
JsonObject innerObj = new JsonObject();
StringBuilder joinBuilder = new StringBuilder();
Map<String, String> testMap = new LinkedHashMap<String, String>();
JsonArray paymentsArray = jsonObject2.getAsJsonArray("payments");
for (JsonElement jsonElement : paymentsArray) {
Set<Entry<String, JsonElement>> elemEntry = ((JsonObject) jsonElement).entrySet();
Iterator<Entry<String, JsonElement>> itr = elemEntry.iterator();
while (itr.hasNext()) {
Entry<String, JsonElement> entry = itr.next();
testMap.put(entry.getKey(), entry.getValue().getAsString());
}
if (testMap.get("d").equals("0")) {
testMap.clear();
} else {
joinBuilder.append(StringUtils.join(testMap.values(), ';')).append(",");
}
}
joinBuilder.deleteCharAt(joinBuilder.length() - 1);
innerObj.addProperty("payments", joinBuilder.toString());
System.out.println(innerObj.toString());
}
輸出：{"payments":"54;66;21;76,34;23;43;88"}
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