今天调用一个webservices,一直报错,以为是地址不正确,我写了个例子,如下
- Java code
public static void main(String[] args) throws Exception { URL url = new URL( "http://www.baidu.com"); URLConnection conn = url.openConnection(); conn.connect(); System.out.println("連接成功"); }竟然连baidu都连不上,我的电脑是可以连网的,用的是eclipse(version=3.6.1)，这是怎么回事,错误如下
- Java code
Exception in thread "main" java.net.UnknownHostException: www.baidu.com at java.net.PlainSocketImpl.connect(Unknown Source) at java.net.SocksSocketImpl.connect(Unknown Source) at java.net.Socket.connect(Unknown Source) at java.net.Socket.connect(Unknown Source) at sun.net.NetworkClient.doConnect(Unknown Source) at sun.net.www.http.HttpClient.openServer(Unknown Source) at sun.net.www.http.HttpClient.openServer(Unknown Source) at sun.net.www.http.HttpClient.<init>(Unknown Source) at sun.net.www.http.HttpClient.New(Unknown Source) at sun.net.www.http.HttpClient.New(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source) at com.arj.comm.util.WeatherReport.main(WeatherReport.java:131)
WeatherReport是main方法所在类,131行是下边这句
- Java code
conn.connect();
机器问题还是这个例子有错误啊
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代码没问题
难倒是楼主网络问题？
你是在电脑测试的？还是手机
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这个说明DNS解析失败。。。
直接在命令行下：ping www.baidu.com 能看到IP地址么？
另外，你不会是用代理来上网的吧？