private static ZKConfig setZkRoot(final ZKConfig zkConfig2, final String zkRoot) {
        if (StringUtils.isNotBlank(zkRoot)) {
            zkConfig2.zkRoot = zkRoot;
        }
        return zkConfig2;
    }
Usage: stats -config configFilePath -item item

@author apple
metamorphosis-tools/src/main/java/com/taobao/metamorphosis/tools/shell/BrokerStatsTool.java