src/main/java/com/alipay/remoting/Url.java
public String getProperty(String key) {
        if (properties == null) {
            return null;
        }
        return properties.getProperty(key);
    }
public String getProperty(String key) {
        if (properties == null) {
            return null;
        }
        return properties.getProperty(key);
    }
Get property value according to property key

@param key
@return property value