httpClient 备忘

最新推荐文章于 2025-08-22 14:03:26 发布

mazzystar0

最新推荐文章于 2025-08-22 14:03:26 发布

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文章标签：爬虫 java

本文链接：https://blog.youkuaiyun.com/mazzystar0/article/details/84117700

本文介绍如何使用Apache HttpClient库实现网站登录功能，并通过示例代码展示了具体的实现过程。该示例以登录iteye网站并访问个人博客为例，演示了如何设置登录参数、处理字符编码及模拟用户代理。

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apache common httpClient 使用，登录iteye，访问我的博客

import java.io.IOException;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.NameValuePair;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.params.HttpMethodParams;
import org.apache.log4j.Logger;

public class HttpClientTest {
	private static Logger logger = Logger.getLogger(HttpClientTest.class);

	private static final String name = "mazzystar";
	private static final String password = "xxxxxx";
	private static final String loginUrl = "http://www.iteye.com/login";
	private static final String blogUrl = "http://mazzystar.iteye.com/admin";

	public static void main(String[] args) throws HttpException, IOException {
		HttpClient c = new HttpClient();

		NameValuePair[] loginPair = { new NameValuePair("remember_me", "1"),
				new NameValuePair("name", name),
				new NameValuePair("password", password) };
		// 登录
		PostMethod m = postMethod(loginUrl);
		m.setRequestBody(loginPair);

		c.executeMethod(m);
		logger.debug(getResponse(m));

		// 我的博客
		PostMethod om = postMethod(blogUrl);
		c.executeMethod(om);
		logger.debug(getResponse(om));
	}

	public static PostMethod postMethod(String url) {
		PostMethod om = new PostMethod(url);
		// 处理乱码
		om.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET,
				"UTF-8");
		// 如果不设置 iteye会当做网络爬虫，出现相应的错误页面
		om
				.setRequestHeader("User-Agent",
						"Mozilla/5.0 (Windows NT 5.1; rv:8.0) Gecko/20100101 Firefox/8.0");
		return om;
	}

	public static String getResponse(PostMethod m) {
		try {
			// 处理乱码
			return new String(m.getResponseBodyAsString().getBytes("UTF-8"));
		} catch (Exception e) {
			logger.error("error : ", e);
			return "";
		}
	}
}