snaker-core/src/main/java/org/snaker/engine/helper/ConfigHelper.java
public static String getProperty(String key) {
        if (key == null) {
            return null;
        }
        return getProperties().getProperty(key);
    }
public static String getProperty(String key) {
        if (key == null) {
            return null;
        }
        return getProperties().getProperty(key);
    }
根据key获取配置的字符串value值
@param key
@return