java.net.*获取网络数据

 1 import java.io.ByteArrayOutputStream;
 2 import java.io.File;
 3 import java.io.FileOutputStream;
 4 import java.io.InputStream;
 5 import java.net.HttpURLConnection;
 6 import java.net.URL;
 7 
 8 public class NetTool {
 9    
10     /** 
11      * 获得url代码数据 
12     * */
13     public static String getHtml(String path, String encoding) throws Exception {
14         URL url = new URL(path);
15         HttpURLConnection conn = (HttpURLConnection) url.openConnection();
16         conn.setRequestMethod("GET");
17         conn.setConnectTimeout(6 * 1000);
18         System.out.println(conn.getResponseCode());
19         if (conn.getResponseCode() == 200) {
20             InputStream inputStream = conn.getInputStream();
21             byte[] data = readStream(inputStream);
22             return new String(data, encoding);
23         }
24         return null;
25     }
26 
27     /**
28      * 获取指定路径，的数据。
29      * **/
30     public static byte[] getImage(String urlpath) throws Exception {
31         URL url = new URL(urlpath);
32         HttpURLConnection conn = (HttpURLConnection) url.openConnection();
33         conn.setRequestMethod("GET");
34         conn.setConnectTimeout(6 * 1000);
35         if (conn.getResponseCode() == 200) {
36             InputStream inputStream = conn.getInputStream();
37             return readStream(inputStream);
38         }
39         return null;
40     }
41 
42     /**
43      * 读取数据 输入流
44      * */
45     public static byte[] readStream(InputStream inStream) throws Exception {
46         ByteArrayOutputStream outstream = new ByteArrayOutputStream();
47         byte[] buffer = new byte[1024];
48         int len = -1;
49         while ((len = inStream.read(buffer)) != -1) {
50             outstream.write(buffer, 0, len);
51         }
52         outstream.close();
53         inStream.close();
54         return outstream.toByteArray();
55     }
56 }

 1 editText.setText("http://apps.hi.baidu.com/share/detail/30420431");
 2 
 3         button.setOnClickListener(new View.OnClickListener() {
 4             @Override
 5             public void onClick(View v) {
 6                 String strHtmlUrl = editText.getText().toString();
 7                 try {
 8                     html = NetTool.getHtml(strHtmlUrl, "GB2312");
 9                     textView.setText(html);
10                 } catch (Exception e) {
11                     Log.i("Activity02", e.toString());
12                     Toast.makeText(Activity02.this, "获得网页失败", 1).show();
13                 }
14 
15             }
16         });

PS：有些网站 弄下来之后是中文是乱码， why？

我一遇到编码问题就头晕 @@@

String dataString = "";
        String urlString = "http://www.qidian.com/BookReader/1995036.aspx";
        try {
            URL url = new URL(urlString);
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();        
            
            InputStreamReader in = new InputStreamReader(conn.getInputStream(),"GB2312");
            
            BufferedReader buffer = new BufferedReader(in);
            String inputString = "";
            while ((inputString = buffer.readLine()) != null) {
                dataString += inputString + "\n";
            }
            in.close();
            conn.disconnect();            
        } catch (Exception e) {
            System.out.println(e.getMessage() + "");
        }
        setContentView(R.layout.main);
        TextView tv = (TextView) this.findViewById(R.id.textView);
        //dataString = FormatStr(dataString);
        tv.setText(dataString);

InputStreamReader in = new InputStreamReader(conn.getInputStream(),"GB2312"); 通过这样重新编码后 显示出来这个网页中文没有乱码

但是 当我把urlString 换成百度的时候 又有乱码了············坑爹 百度的是要用UTF-8 才不会有中文乱码！！

PS:跪求一劳永逸的解决方案,有没有一种方法能够获得网站的网页编码格式啊······················