Modify a key in the json string
public static JsonElement replaceKey(JsonElement source, Map<String, String> rep) {
if (source == null || source.isJsonNull()) {
return JsonNull.INSTANCE;
}
if (source.isJsonPrimitive()) {
return source;
}
if (source.isJsonArray()) {
JsonArray jsonArr = source.getAsJsonArray();
JsonArray jsonArray = new JsonArray();
jsonArr.forEach(item -> {
jsonArray.add(replaceKey(item, rep));
});
return jsonArray;
}
if (source.isJsonObject()) {
JsonObject jsonObj = source.getAsJsonObject();
Iterator<Entry<String, JsonElement>> iterator = jsonObj.entrySet().iterator();
JsonObject newJsonObj = new JsonObject();
iterator.forEachRemaining(item -> {
String key = item.getKey();
JsonElement value = item.getValue();
if (rep.containsKey(key)) {
String newKey = rep.get(key);
key = newKey;
}
newJsonObj.add(key, replaceKey(value, rep));
});
return newJsonObj;
}
return JsonNull.INSTANCE;
}
Modify the value corresponding to a key in the json string
public static JsonElement replaceJsonNode(JsonElement jsonElement, Map<String, Object> map) {
if (map.size() == 0) {
return jsonElement;
}
// 判断如果是简单json串直接返回
if (jsonElement.isJsonPrimitive()) {
return jsonElement;
}
// 判断如果是数组类型字符串，则逐个解析
if (jsonElement.isJsonArray()) {
JsonArray jsonArray = jsonElement.getAsJsonArray();
JsonArray jsonArryNew = new JsonArray();
for (JsonElement element : jsonArray) {
// 递归调用
jsonArryNew.add(replaceJsonNode(element, map));
}
return jsonArryNew;
}
// 判断如果是key-value类型的
if (jsonElement.isJsonObject()) {
JsonObject object = jsonElement.getAsJsonObject();
JsonObject objectNew = new JsonObject();
for (String key : object.keySet()) {
// 如果和目标字段匹配则更换value;
if (map.containsKey(key)) {
Object newValue = map.get(key);
if (newValue instanceof String) {
object.addProperty(key, (String) newValue);
} else if (newValue instanceof Boolean) {
object.addProperty(key, (Boolean) newValue);
} else if (newValue instanceof Character) {
object.addProperty(key, (Character) newValue);
} else {
object.addProperty(key, (Number) newValue);
}
}
JsonElement jsonEle = object.get(key);
JsonElement jsonElementNew = replaceJsonNode(jsonEle, map);
objectNew.add(key, jsonElementNew);
}
return objectNew;
}
return jsonElement;
}
test
public static void main(String[] args) {
String json = "{\"order_sn\":\"14031000273822\",\"carriers_code\":1100000357,\"carrier\":\"浙江派尔快递\",\"package_type\":2,\"packages\":[{\"0\":{\"good_sn\":\"ALM2236W36\",\"amount\":\"2\"},\"1\":{\"good_sn\":\"ALM2236W37\",\"amount\":\"2\"},\"transport_no\":\"test5715A\"},{\"0\":{\"good_sn\":\"ALM2236W35\",\"amount\":\"2\"},\"transport_no\":\"test5715B\"}]}";
JsonElement jsonEle = new JsonParser().parse(json);
HashMap<String, String> rep = new HashMap<>();
rep.put("order_sn", "order_id");
rep.put("carriers_code", "carrier_code");
rep.put("good_sn", "barcode");
JsonElement replaceKey = replaceKey(jsonEle, rep);
System.out.println(replaceKey.toString());
Map<String, Object> map = new HashMap();
map.put("order_sn","00000000");
map.put("carriers_code","9999999");
map.put("good_sn",888);
System.out.println(replaceJsonNode(jsonEle, map).toString());
}
result
- Before running
{ "order_sn": "14031000273822", "carriers_code": 1100000357, "carrier": "浙江派尔快递", "package_type": 2, "packages": [ { "0": { "good_sn": "ALM2236W36", "amount": "2" }, "1": { "good_sn": "ALM2236W37", "amount": "2" }, "transport_no": "test5715A" }, { "0": { "good_sn": "ALM2236W35", "amount": "2" }, "transport_no": "test5715B" } ] } - After running
- Modify key
{ "order_id": "14031000273822", "carrier_code": 1100000357, "carrier": "浙江派尔快递", "package_type": 2, "packages": [ { "0": { "barcode": "ALM2236W36", "amount": "2" }, "1": { "barcode": "ALM2236W37", "amount": "2" }, "transport_no": "test5715A" }, { "0": { "barcode": "ALM2236W35", "amount": "2" }, "transport_no": "test5715B" } ] } - Modify the value of the corresponding key
{ "order_sn": "00000000", "carriers_code": "9999999", "carrier": "浙江派尔快递", "package_type": 2, "packages": [ { "0": { "good_sn": 888, "amount": "2" }, "1": { "good_sn": 888, "amount": "2" }, "transport_no": "test5715A" }, { "0": { "good_sn": 888, "amount": "2" }, "transport_no": "test5715B" } ] }
- Modify key