Java Utililty Methods Json

List of utility methods to do Json

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Description

The list of methods to do Json are organized into topic(s).

Method

StringjsonValueToJsonString(final JsonValue jsonValue, final String key)
Parse a JsonValue into String 
final StringBuilder builder = new StringBuilder();
if (key != null) {
    builder.append('\"').append(key).append("\":");
if (jsonValue instanceof JsonString) {
    builder.append('\"').append(jsonValue.toString()).append('\"');
} else if (jsonValue instanceof JsonNumber || jsonValue instanceof JsonObject) {
    builder.append(jsonValue.toString());
...
JsonArraylistToJsonArray(List list)
Method used to build the JSON Array of Strings. 
JsonArrayBuilder ab = Json.createArrayBuilder();
for (String element : list) {
    ab.add(element);
return ab.build();
JsonObjectBuildermapToJsonObjectBuilder(Map map)
map To Json Object Builder 
JsonObjectBuilder jsonObject = Json.createObjectBuilder();
if (map == null || map.isEmpty()) {
    return jsonObject;
Iterator<Entry<String, String>> i = map.entrySet().iterator();
while (i.hasNext()) {
    Entry<String, String> e = i.next();
    jsonObject.add(e.getKey(), e.getValue());
...
JsonObjectnewObject()
Creates a new object. 
return Json.createObjectBuilder().build();
JsonValuenullable(String value)
Returns a JsonValue from a String. 
if (value == null) {
    return JsonValue.NULL;
return Json.createObjectBuilder().add("_", value).build().get("_");
StringobjectToJsonDateSerializer(Object ts, final String dateformat)
object To Json Date Serializer 
String jsonStr = null;
gson = new GsonBuilder().registerTypeHierarchyAdapter(Date.class, new JsonSerializer<Date>() {
    public JsonElement serialize(Date src, Type typeOfSrc, JsonSerializationContext context) {
        SimpleDateFormat format = new SimpleDateFormat(dateformat);
        return new JsonPrimitive(format.format(src));
}).setDateFormat(dateformat).create();
if (gson != null) {
...
voidprintJavaxJsonProvider()
print Javax Json Provider 
System.out.println("Jsonp Provider:" + JsonProvider.provider().getClass().getCanonicalName());
System.out.println();
Objectread(String jsonString)
read 
return parse(new StringCharacterIterator(jsonString));
DatereadMandatoryDateField(JsonParser jsonParser, String fieldName)
read Mandatory Date Field 
String value = readMandatoryField(jsonParser, fieldName);
if (value == null) {
    return null;
return parseDateValue(value);
booleanrequiredParams(JsonObject map, String... params)
Checks if the parameters specified (which are required) are used as keys in the specified map 
for (String param : params) {
    if (!map.containsKey(param)) {
        return false;
return true;