Java Utililty Methods Json Create

return Json.createArrayBuilder().build();

return G.toJson(t);

String jsonStr = null;
Gson 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) {
...

ObjectMapper objectMapper = new ObjectMapper();
objectMapper.setDateFormat(new SimpleDateFormat(DATE_FORMAT_DEF));
objectMapper.getDeserializationConfig().with(new SimpleDateFormat(DATE_FORMAT_DEF));
StringWriter stringWriter = new StringWriter();
return objectMapper.readValue(json, clazz);

ObjectMapper objectMapper = new ObjectMapper();
objectMapper.setDateFormat(new SimpleDateFormat(DATE_FORMAT_DEF));
StringWriter stringWriter = new StringWriter();
objectMapper.writeValue(stringWriter, e);
return stringWriter.toString();

ObjectMapper mapper = new ObjectMapper();
mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
mapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd"));
try {
    return mapper.writeValueAsString(map);
} catch (JsonProcessingException e) {
    throw new RuntimeException(e);

ObjectMapper mapper = new ObjectMapper();
mapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));
try {
    return mapper.writeValueAsString(object);
} catch (JsonProcessingException e) {
    return "";

ObjectMapper objectMapper = new ObjectMapper();
objectMapper.setDateFormat(new SimpleDateFormat(dateFormat));
objectMapper.configure(SerializationFeature.WRITE_ENUMS_USING_TO_STRING, true);
try {
    return objectMapper.writeValueAsString(object);
} catch (Exception e) {
    e.printStackTrace();
return null;

StringBuilder sb = new StringBuilder();
sb.append("{");
for (Object entryO : map.entrySet()) {
    if (sb.length() > 1) {
        sb.append(",");
    Entry entry = (Entry) entryO;
    sb.append("\"");
...

return (List<T>) readValue(json, clz);