求解答：一直报这个错，求帮忙！
命令：java -jar appcrawler-1.7.1.jar -a xueqiu.apk --capability"appPackage=com.xueqiu.android,appActivity=.view.WelcomeActivityAlias"

报错：
Exception in thread "main" org.openqa.selenium.remote.UnreachableBrowserExceptio
n: Could not start a new session. Possible causes are invalid address of the rem
ote server or browser start-up failure.
Build info: version: 'unknown', revision: 'unknown', time: 'unknown'
System info: host: 'FH2GSADPEVC4GUC', ip: '10.88.122.10', os.name: 'Windows 7',
os.arch: 'amd64', os.version: '6.1', java.version: '1.8.0_101'
Driver info: driver.version: AndroidDriver
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.ja
va:665)
at io.appium.java_client.DefaultGenericMobileDriver.execute(DefaultGener
icMobileDriver.java:40)
at io.appium.java_client.AppiumDriver.execute(AppiumDriver.java:1)
at io.appium.java_client.android.AndroidDriver.execute(AndroidDriver.jav
a:1)
at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriv
er.java:249)
at org.openqa.selenium.remote.RemoteWebDriver.(RemoteWebDriver.jav
a:131)
at org.openqa.selenium.remote.RemoteWebDriver.(RemoteWebDriver.jav
a:144)
at io.appium.java_client.DefaultGenericMobileDriver.(DefaultGeneri
cMobileDriver.java:36)
at io.appium.java_client.AppiumDriver.(AppiumDriver.java:114)
at io.appium.java_client.AppiumDriver.(AppiumDriver.java:132)
at io.appium.java_client.android.AndroidDriver.(AndroidDriver.java
:92)
at com.xueqiu.qa.appcrawler.AndroidCrawler.setupAppium(AndroidCrawler.sc
ala:37)
at com.xueqiu.qa.appcrawler.Crawler.start(Crawler.scala:130)
at com.xueqiu.qa.appcrawler.AppCrawler$.startCrawl(AppCrawler.scala:283)

at com.xueqiu.qa.appcrawler.AppCrawler$.main(AppCrawler.scala:262)
at com.xueqiu.qa.appcrawler.AppCrawler.main(AppCrawler.scala)
Caused by: org.openqa.selenium.WebDriverException: org.apache.http.conn.HttpHost
ConnectException: Connect to 127.0.0.1:4723 [/127.0.0.1] failed: Connection refu
sed: connect
Build info: version: 'unknown', revision: 'unknown', time: 'unknown'
System info: host: 'FH2GSADPEVC4GUC', ip: '10.88.122.10', os.name: 'Windows 7',
os.arch: 'amd64', os.version: '6.1', java.version: '1.8.0_101'
Driver info: driver.version: AndroidDriver
at io.appium.java_client.remote.AppiumCommandExecutor.execute(AppiumComm
andExecutor.java:84)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.ja
va:644)
... 15 more
Caused by: org.apache.http.conn.HttpHostConnectException: Connect to 127.0.0.1:4
723 [/127.0.0.1] failed: Connection refused: connect
at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect
(DefaultHttpClientConnectionOperator.java:158)
at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(
PoolingHttpClientConnectionManager.java:353)
at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClie
ntExec.java:380)
at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.
java:236)
at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java
:184)
at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:88)
at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java
:110)
at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttp
Client.java:184)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttp
Client.java:71)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttp
Client.java:55)
at org.openqa.selenium.remote.internal.ApacheHttpClient.fallBackExecute(
ApacheHttpClient.java:144)
at org.openqa.selenium.remote.internal.ApacheHttpClient.execute(ApacheHt
tpClient.java:90)
at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExe
cutor.java:142)
at io.appium.java_client.remote.AppiumCommandExecutor.execute(AppiumComm
andExecutor.java:69)
... 16 more
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketI
mpl.java:85)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.ja
va:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocket
Impl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java
:188)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at org.apache.http.conn.socket.PlainConnectionSocketFactory.connectSocke
t(PlainConnectionSocketFactory.java:74)
at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect
(DefaultHttpClientConnectionOperator.java:141)
... 29 more