Java获取网页源代码

最新推荐文章于 2024-03-30 16:10:00 发布

iteye_21202

最新推荐文章于 2024-03-30 16:10:00 发布

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文章标签： java

本文提供了一个使用Java语言实现的简单方法来获取指定URL的网页源代码。通过设置HTTP请求头模仿浏览器行为，并处理各种异常情况，确保了代码的稳定性和实用性。

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Java获取网页源代码

public class HtmlParser {

	public static String getHtmlContent(URL url, String encode) {
			StringBuffer contentBuffer = new StringBuffer();

			int responseCode = -1;
			HttpURLConnection con = null;
			try {
				con = (HttpURLConnection) url.openConnection();
				con.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");// IE代理进行下载
				con.setConnectTimeout(60000);
				con.setReadTimeout(60000);
				// 获得网页返回信息码
				responseCode = con.getResponseCode();
				if (responseCode == -1) {
					System.out.println(url.toString() + " : connection is failure...");
					con.disconnect();
					return null;
				}
				if (responseCode >= 400) // 请求失败
				{
					System.out.println("请求失败:get response code: " + responseCode);
					con.disconnect();
					return null;
				}

				InputStream inStr = con.getInputStream();
				InputStreamReader istreamReader = new InputStreamReader(inStr, encode);
				BufferedReader buffStr = new BufferedReader(istreamReader);

				String str = null;
				while ((str = buffStr.readLine()) != null)
					contentBuffer.append(str);
				inStr.close();
			} catch (IOException e) {
				e.printStackTrace();
				contentBuffer = null;
				System.out.println("error: " + url.toString());
			} finally {
				con.disconnect();
			}
			return contentBuffer.toString();
		}

		public static String getHtmlContent(String url, String encode) {
			if (!url.toLowerCase().startsWith("http://")) {
				url = "http://" + url;
			}
			try {
				URL rUrl = new URL(url);
				return getHtmlContent(rUrl, encode);
			} catch (Exception e) {
				e.printStackTrace();
				return null;
			}
		}
		
		public static void main(String argsp[]){
			System.out.println(getHtmlContent("blog.youkuaiyun.com/powmxypow","utf-8")) ;
		}
}

(转载请注明出处:http://blog.youkuaiyun.com/powmxypow/article/details/12349099 毛兴宇)