摘要：在調用webservice客戶端代碼的時候報如下錯誤

Invoking reportLossByRdid...
Exception in thread "main" com.sun.xml.internal.ws.client.ClientTransportException: HTTP transport error: java.net.UnknownHostException: opacat com.sun.xml.internal.ws.transport.http.client.HttpClientTransport.getOutput(HttpClientTransport.java:117)at com.sun.xml.internal.ws.transport.http.client.HttpTransportPipe.process(HttpTransportPipe.java:194)at com.sun.xml.internal.ws.transport.http.client.HttpTransportPipe.processRequest(HttpTransportPipe.java:122)at com.sun.xml.internal.ws.transport.DeferredTransportPipe.processRequest(DeferredTransportPipe.java:95)at com.sun.xml.internal.ws.api.pipe.Fiber.__doRun(Fiber.java:626)at com.sun.xml.internal.ws.api.pipe.Fiber._doRun(Fiber.java:585)at com.sun.xml.internal.ws.api.pipe.Fiber.doRun(Fiber.java:570)at com.sun.xml.internal.ws.api.pipe.Fiber.runSync(Fiber.java:467)at com.sun.xml.internal.ws.client.Stub.process(Stub.java:308)at com.sun.xml.internal.ws.client.sei.SEIStub.doProcess(SEIStub.java:163)at com.sun.xml.internal.ws.client.sei.SyncMethodHandler.invoke(SyncMethodHandler.java:98)at com.sun.xml.internal.ws.client.sei.SyncMethodHandler.invoke(SyncMethodHandler.java:78)at com.sun.xml.internal.ws.client.sei.SEIStub.invoke(SEIStub.java:135)at com.sun.proxy.$Proxy30.reportLossByRdid(Unknown Source)at com.qdexam.ReaderWebservice_ReaderWebservicePort_Client.main(ReaderWebservice_ReaderWebservicePort_Client.java:60)
Caused by: java.net.UnknownHostException: opacat java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:178)at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)at java.net.Socket.connect(Socket.java:579)at java.net.Socket.connect(Socket.java:528)at sun.net.NetworkClient.doConnect(NetworkClient.java:180)at sun.net.www.http.HttpClient.openServer(HttpClient.java:432)at sun.net.www.http.HttpClient.openServer(HttpClient.java:527)at sun.net.www.http.HttpClient.<init>(HttpClient.java:211)at sun.net.www.http.HttpClient.New(HttpClient.java:308)at sun.net.www.http.HttpClient.New(HttpClient.java:326)at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:996)at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:975)at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:850)at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1091)at com.sun.xml.internal.ws.transport.http.client.HttpClientTransport.getOutput(HttpClientTransport.java:105)... 14 more

一：問題原因

無法解析該域名，可以將域名對應的ip寫入到hosts文件中保存。

二：解決辦法：

將域名對應的ip寫入到hosts文件中保存

Windows的hosts文件在“C:\windows\system32\drivers\etc”中。

Linux更改hosts的操作如下：

cd /etc/

vi hosts

輸入如下:

# Copyright (c) 1993-2009 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# For example:
#
#      102.54.94.97     rhino.acme.com          # source server
#       38.25.63.10     x.acme.com              # x client host# localhost name resolution is handled within DNS itself.
#	127.0.0.1       localhost
#	::1             localhost211.151.71.11	opac