本文介紹了Java inputstream打印以控制內(nèi)容的處理方法，對大家解決問題具有一定的參考價值，需要的朋友們下面隨著小編來一起學(xué)習(xí)吧！
問題描述
sock = new Socket("www.google.com", 80);
out = new BufferedOutputStream(sock.getOutputStream());
in = new BufferedInputStream(sock.getInputStream());
當(dāng)我嘗試打印出”in”中的內(nèi)容時，如下圖所示
BufferedInputStream bin = new BufferedInputStream(in);
int b;
while ( ( b = bin.read() ) != -1 )
{
char c = (char)b;
System.err.print(""+(char)b); //This prints out content that is unreadable.
//Isn't it supposed to print out html tag?
}
推薦答案
如果要打印網(wǎng)頁內(nèi)容，則需要使用HTTP協(xié)議。您不必自己實現(xiàn)它，最好的方法是使用現(xiàn)有的實現(xiàn)，如java APIHttpURLConnection或Apache的HttpClient
以下是如何使用HttpURLConnection執(zhí)行此操作的示例：
URL url = new URL("http","www.google.com");
HttpURLConnection urlc = (HttpURLConnection)url.openConnection();
urlc.setAllowUserInteraction( false );
urlc.setDoInput( true );
urlc.setDoOutput( false );
urlc.setUseCaches( true );
urlc.setRequestMethod("GET");
urlc.connect();
// check you have received an status code 200 to indicate OK
// get the encoding from the Content-Type header
BufferedReader in = new BufferedReader(new InputStreamReader(urlc.getInputStream()));
String line = null;
while((line = in.readLine()) != null) {
System.out.println(line);
}
// close sockets, handle errors, etc.
如上所述，您可以通過添加Accept-Encoding標(biāo)頭并檢查
Content-響應(yīng)的編碼頭。
以下是HttpClient示例，摘自here：
// Create an instance of HttpClient.
HttpClient client = new HttpClient();
// Create a method instance.
GetMethod method = new GetMethod(url);
// Provide custom retry handler is necessary
method.getParams().setParameter(HttpMethodParams.RETRY_HANDLER,
new DefaultHttpMethodRetryHandler(3, false));
try {
// Execute the method.
int statusCode = client.executeMethod(method);
if (statusCode != HttpStatus.SC_OK) {
System.err.println("Method failed: " + method.getStatusLine());
}
// Read the response body.
byte[] responseBody = method.getResponseBody();
// Deal with the response.
// Use caution: ensure correct character encoding and is not binary data
System.out.println(new String(responseBody));
} catch (HttpException e) {
System.err.println("Fatal protocol violation: " + e.getMessage());
e.printStackTrace();
} catch (IOException e) {
System.err.println("Fatal transport error: " + e.getMessage());
e.printStackTrace();
} finally {
// Release the connection.
method.releaseConnection();
}
這篇關(guān)于Java inputstream打印以控制內(nèi)容的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，
