Java Utililty Methods Json to Object

List of utility methods to do Json to Object

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Description

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

Method

TdeserializeJson(String content, Class valueType)
deserialize Json 
return new ObjectMapper().readValue(content, valueType);
Listjson2List(String json, Class beanClass)
json List 
try {
    return (List<T>) objectMapper.readValue(json, getCollectionType(List.class, beanClass));
} catch (Exception e) {
    e.printStackTrace();
return null;
Mapjson2map(String jsonStr)
json string convert to map 
return objectMapper.readValue(jsonStr, Map.class);
Tjson2pojo(String jsonStr, Class clazz)
json string convert to javaBean 
return objectMapper.readValue(jsonStr, clazz);
BigDecimaljsonBigDecimal(JsonValue value)
json Big Decimal 
if (value == null || value.getValueType() == JsonValue.ValueType.NULL)
    return null;
if (value.getValueType() == JsonValue.ValueType.NUMBER && (value instanceof JsonNumber))
    return ((JsonNumber) value).bigDecimalValue();
if (value.getValueType() == JsonValue.ValueType.STRING && (value instanceof JsonString)) {
    NumberFormat f = NumberFormat.getNumberInstance();
    if (f instanceof DecimalFormat)
        ((DecimalFormat) f).setParseBigDecimal(true);
...
ListjsonStringToList(String jsonArrStr, Class clazz)
json String To List 
try {
    ObjectMapper mapper = new ObjectMapper();
    JavaType javaType = mapper.getTypeFactory().constructParametricType(List.class, clazz);
    return mapper.readValue(jsonArrStr, javaType);
} catch (Exception e) {
    return null;
TjsonToBeanDateSerializer(String jsonStr, Class cl, final String pattern)
json To Bean Date Serializer 
Object obj = null;
gson = new GsonBuilder().registerTypeAdapter(Date.class, new JsonDeserializer<Date>() {
    @Override
    public Date deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
            throws JsonParseException {
        SimpleDateFormat format = new SimpleDateFormat(pattern);
        String dateString = json.getAsString();
        try {
...
TjsonToList(String json, Class parametrized, Class... parameterClasses)
json To List 
try {
    TypeFactory typeFactory = MAPPER.getTypeFactory();
    return MAPPER.readValue(json, typeFactory.constructParametricType(parametrized, parameterClasses));
} catch (Exception ex) {
    throw new RuntimeException(ex);
TjsonToList(String jsonStr, TypeReference valueTypeRef)
json To List 
ObjectMapper mapper = new ObjectMapper();
try {
    return mapper.readValue(jsonStr, valueTypeRef);
} catch (Exception e) {
    e.printStackTrace();
return null;
MapjsonToMap(String src)
json To Map 
try {
    return mapper.readValue(src, new TypeReference<Map<String, Object>>() {
    });
} catch (Exception e) {
    throw new RuntimeException(e);