java 使用htmlunit模拟登录爬取新浪微博页面

import java.io.IOException;
import java.net.MalformedURLException;
import com.gargoylesoftware.htmlunit.BrowserVersion;
import com.gargoylesoftware.htmlunit.FailingHttpStatusCodeException;
import com.gargoylesoftware.htmlunit.NicelyResynchronizingAjaxController;
import com.gargoylesoftware.htmlunit.WebClient;
import com.gargoylesoftware.htmlunit.html.HtmlInput;
import com.gargoylesoftware.htmlunit.html.HtmlPage;

public class SinaLoginTest {
public static void main(String[] args) throws FailingHttpStatusCodeException, MalformedURLException, IOException, InterruptedException {
WebClient client = new WebClient(BrowserVersion.FIREFOX_24);
client.getOptions().setJavaScriptEnabled(true); //默认执行js，如果不执行js，则可能会登录失败，因为用户名密码框需要js来绘制。
client.getOptions().setCssEnabled(false);
client.setAjaxController(new NicelyResynchronizingAjaxController());
client.getOptions().setThrowExceptionOnScriptError(false);

HtmlPage page = client.getPage("http://login.sina.com.cn/sso/login.php?client=ssologin.js(v1.3.16)");
//System.out.println(page.asText());

//登录

HtmlInput ln = page.getHtmlElementById("username");
HtmlInput pwd = page.getHtmlElementById("password");
HtmlInput btn = page.getFirstByXPath(".//*[@id='vForm']/div[3]/ul/li[6]/div[2]/input");

ln.setAttribute("value", "此处改为你的用户名");
pwd.setAttribute("value", "此处改为你的密码");

HtmlPage page2 = btn.click();
//登录完成，现在可以爬取任意你想要的页面了。
System.out.println("\n\n\n");
//System.out.println(page2.asText());

HtmlPage page3 = client.getPage("http://weibo.com/friends?leftnav=1&wvr=5&isfriends=1&step=2");
System.out.println(" : " + page3.asXml());

client.closeAllWindows();
}

}

<注>取回html（对于page3，就是page3.asXml()）后只需要用正则取出你想要的内容即可。

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