java和url相关的操作

1、获取一个web的源码

URL url = new URL("http://www.taobao.com/");URLConnection connection = url.openConnection();InputStream in_urlStream = connection.getInputStream();BufferedReader reader = new BufferedReader(new InputStreamReader(in_urlStream));String currentline = null;String result = null;while ((currentline = reader.readLine()) != null){result += currentline + "\r\n";}System.out.println(result);

2、访问一个web，并传参数

   a、把参数附在url的后面，比如：http://www.xxx.com?xx='xx'&yy=‘yy’。相当于get方式。

   b、相当于post方式

URL url = new URL("http://www.taobao.com/");URLConnection connection = url.openConnection();connection.setDoOutput(true);OutputStreamWriter out = new OutputStreamWriter(connection.getOutputStream());out.write("name='andy'&pwd='123'");out.flush();out.close();