hertzbeat-common/src/main/java/org/apache/hertzbeat/common/util/JsonUtil.java [34:118]:
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@ThreadSafe
@Slf4j
public final class JsonUtil {

    private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();

    private JsonUtil() {
    }

    static {
        OBJECT_MAPPER
                .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
                .configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false)
                .registerModule(new JavaTimeModule());
    }

    public static String toJson(Object source) {
        if (source == null) {
            return null;
        }
        try {
            return OBJECT_MAPPER.writeValueAsString(source);
        } catch (JsonProcessingException e) {
            log.error(e.getMessage(), e);
            return null;
        }
    }

    public static <T> T fromJson(String jsonStr, Class<T> clazz) {
        if (!StringUtils.hasText(jsonStr)) {
            return null;
        }
        try {
            return OBJECT_MAPPER.readValue(jsonStr, clazz);
        } catch (Exception e) {
            log.error(e.getMessage(), e);
            return null;
        }
    }

    public static <T> T fromJson(String jsonStr, TypeReference<T> type) {
        if (!StringUtils.hasText(jsonStr)) {
            return null;
        }
        try {
            return OBJECT_MAPPER.readValue(jsonStr, type);
        } catch (Exception e) {
            log.error(e.getMessage(), e);
            return null;
        }
    }
    
    public static JsonNode fromJson(String jsonStr) {
        if (!StringUtils.hasText(jsonStr)) {
            return null;
        }
        try {
            return OBJECT_MAPPER.readTree(jsonStr);
        } catch (Exception e) {
            log.error(e.getMessage(), e);
            return null;
        }
    }

    /**
     * check if the string is a json string
     * @param jsonStr json string
     * @return true if the string is a json string
     */


    public static boolean isJsonStr(String jsonStr) {
        if (jsonStr == null || jsonStr.trim().isEmpty()) {
            return false;
        }
        jsonStr = jsonStr.trim();
        if (!(jsonStr.startsWith("{") && jsonStr.endsWith("}"))
                && !(jsonStr.startsWith("[") && jsonStr.endsWith("]"))) {
            return false;
        }
        try {
            OBJECT_MAPPER.readTree(jsonStr);
            return true;
        } catch (Exception ignored) {
            return false;
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template-marketplace/hertzbeat-template-hub/src/main/java/org/apache/hertzbeat/templatehub/util/JsonUtil.java [35:119]:
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@ThreadSafe
@Slf4j
public final class JsonUtil {

    private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();

    private JsonUtil() {
    }

    static {
        OBJECT_MAPPER
                .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
                .configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false)
                .registerModule(new JavaTimeModule());
    }

    public static String toJson(Object source) {
        if (source == null) {
            return null;
        }
        try {
            return OBJECT_MAPPER.writeValueAsString(source);
        } catch (JsonProcessingException e) {
            log.error(e.getMessage(), e);
            return null;
        }
    }

    public static <T> T fromJson(String jsonStr, Class<T> clazz) {
        if (!StringUtils.hasText(jsonStr)) {
            return null;
        }
        try {
            return OBJECT_MAPPER.readValue(jsonStr, clazz);
        } catch (Exception e) {
            log.error(e.getMessage(), e);
            return null;
        }
    }

    public static <T> T fromJson(String jsonStr, TypeReference<T> type) {
        if (!StringUtils.hasText(jsonStr)) {
            return null;
        }
        try {
            return OBJECT_MAPPER.readValue(jsonStr, type);
        } catch (Exception e) {
            log.error(e.getMessage(), e);
            return null;
        }
    }
    
    public static JsonNode fromJson(String jsonStr) {
        if (!StringUtils.hasText(jsonStr)) {
            return null;
        }
        try {
            return OBJECT_MAPPER.readTree(jsonStr);
        } catch (Exception e) {
            log.error(e.getMessage(), e);
            return null;
        }
    }

    /**
     * check if the string is a json string
     * @param jsonStr json string
     * @return true if the string is a json string
     */


    public static boolean isJsonStr(String jsonStr) {
        if (jsonStr == null || jsonStr.trim().isEmpty()) {
            return false;
        }
        jsonStr = jsonStr.trim();
        if (!(jsonStr.startsWith("{") && jsonStr.endsWith("}"))
                && !(jsonStr.startsWith("[") && jsonStr.endsWith("]"))) {
            return false;
        }
        try {
            OBJECT_MAPPER.readTree(jsonStr);
            return true;
        } catch (Exception ignored) {
            return false;
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