[英]java.net.UnknownHostException: Unable to resolve host “www.google.com”
[英]getting error Unknow Host : www.google.com
我想解析网页,我正在使用 htmlunit,当我运行代码时,我遇到了以下错误。
import java.net.URL;
import java.util.List;
import com.gargoylesoftware.htmlunit.WebClient;
import com.gargoylesoftware.htmlunit.html.HtmlImage;
import com.gargoylesoftware.htmlunit.html.HtmlPage;
public class scrapImage {
public static void main(String[] args) throws Exception {
URL url = new URL("http://www.google.com");
//WebClient webClient = new WebClient(Opera);
WebClient webClient = new WebClient();
HtmlPage currentPage = (HtmlPage) webClient.getPage(url);
//get list of all divs
final List<?> images = currentPage.getByXPath("//img");
for (Object imageObject : images) {
HtmlImage image = (HtmlImage) imageObject;
System.out.println(image.getSrcAttribute());
} //webClient.closeAllWindows(); } }
}
}
错误信息:
Exception in thread "main" java.net.UnknownHostException: www.google.com
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:196)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:377)
at java.net.Socket.connect(Socket.java:530)
at java.net.Socket.connect(Socket.java:480)
at java.net.Socket.<init>(Socket.java:377)
at java.net.Socket.<init>(Socket.java:251)
at org.apache.commons.httpclient.protocol.DefaultProtocolSocketFactory.createSocket(DefaultProtocolSocketFactory.java:80)
at org.apache.commons.httpclient.protocol.DefaultProtocolSocketFactory.createSocket(DefaultProtocolSocketFactory.java:122)
at org.apache.commons.httpclient.HttpConnection.open(HttpConnection.java:707)
at org.apache.commons.httpclient.MultiThreadedHttpConnectionManager$HttpConnectionAdapter.open(MultiThreadedHttpConnectionManager.java:1361)
at org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:387)
at org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:171)
at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397)
at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:346)
at com.gargoylesoftware.htmlunit.HttpWebConnection.getResponse(HttpWebConnection.java:97)
at com.gargoylesoftware.htmlunit.WebClient.loadWebResponseFromWebConnection(WebClient.java:1430)
at com.gargoylesoftware.htmlunit.WebClient.loadWebResponse(WebClient.java:1388)
at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:325)
at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:386)
at htmlunit.scrapImage.main(scrapImage.java:16)
谁能告诉我上述异常的解决方案。
我认为您的 .net 连接问题或您的防火墙可能会阻止 java 程序访问 inte.net。
我认为你在代理或防火墙后面。 检查您系统中当前的防火墙状态。另外,如果它与代理有关,您可以像这样修改代码。
System.getProperties().put( "proxySet", "true" );
System.getProperties().put( "proxyHost", "your proxy host name" );
System.getProperties().put( "proxyPort", "85" );
可能这会对你有所帮助。
Inte.net 连接似乎有问题,或者您使用了代理,
如果是这种情况,请设置代理设置(主机/端口/用户名/密码)。
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