@Override
    public String toString() {
        StringBuilder sb = new StringBuilder(32);
        sb.append("Origin url [").append(this.originUrl).append("], Unique key [")
            .append(this.uniqueKey).append("].");
        return sb.toString();
    }
Get property value according to property key

@param key property key
@return property value
src/main/java/com/alipay/remoting/Url.java