java 获取网页源代码 （防乱码）

package webcon; import java.io.BufferedReader; public class WebCon { // 获取网页源代码 public String getWebCon(String pageURL,String encoding) { // StringBuffer sb = new StringBuffer(); try { URL url = new URL(pageURL); BufferedReader in = new BufferedReader(new InputStreamReader(url .openStream(),encoding)); String line; while ((line = in.readLine()) != null) { sb.append(line); } in.close(); } catch (Exception e) { // Report any errors that arise sb.append(e.toString()); System.err.println(e); System.err .println("Usage: java HttpClient <URL> [<filename>]"); } return sb.toString(); } }