public static boolean isJson(String str) {
        boolean flag = false;
        if (StringUtils.isNotBlank(str)) {
            try {
                objectMapper.readValue(str, Map.class);
                flag = true;
            } catch (Throwable e) {
                flag = false;
            }
        }
        return flag;
    }
add specify params to dbUrl
@param dbUrl
@param addParams
@param isForce true:replace exists param
@return
core/src/main/java/com/dtstack/flink/sql/util/DtStringUtil.java