一、使用 HttpClient 抓取网页数据
public String getHtml(String htmlurl) throws IOException { StringBuffer sb = new StringBuffer(); String acceptEncoding = ""; /* 1.生成 HttpClinet 对象并设置参数 */ HttpClient httpClient = new HttpClient(); GetMethod method = new GetMethod(htmlurl); int statusCode; try { statusCode = httpClient.executeMethod(method); // 判断访问的状态码 if (statusCode != HttpStatus.SC_OK) { return null; } else { if (method.getResponseHeader("Content-Encoding") != null) acceptEncoding = method.getResponseHeader( "Content-Encoding").getValue(); if (acceptEncoding.toLowerCase().indexOf("gzip") > -1) { // 建立gzip解压工作流 InputStream is; is = method.getResponseBodyAsStream(); GZIPInputStream gzin = new GZIPInputStream(is); InputStreamReader isr = new InputStreamReader(gzin, Charset.forName(CHARSET)); // 设置读取流的编码格式，自定义编码 java.io.BufferedReader br = new java.io.BufferedReader(isr); String tempbf; while ((tempbf = br.readLine()) != null) { if(StringUtils.isNotBlank(tempbf)){ sb.append(tempbf); } } isr.close(); gzin.close(); System.out.println(sb); } else { InputStreamReader isr; isr = new InputStreamReader( method.getResponseBodyAsStream(), CHARSET); java.io.BufferedReader br = new java.io.BufferedReader(isr); String tempbf; while ((tempbf = br.readLine()) != null) { if(StringUtils.isNotBlank(tempbf)){ sb.append(tempbf); } } isr.close(); } } } catch (HttpException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } method.abort(); method.releaseConnection(); return sb.toString(); } |
