2
我試圖在HTTP Web服務器中顯示圖像,但我無法。我可以顯示HTML。我認爲這與我處理IO(輸入和輸出流)的方式有關。那裏可能有很多我沒有注意到的錯誤。如何顯示來自HTTP Web服務器的圖像?
import java.io.* ;
import java.net.* ;
import java.util.Properties;
public class HTTPThread extends Thread
{
private Socket socket = null;
private Properties config = null;
private String root = "";
public HTTPThread(Socket s, Properties config)
{
this.socket = s;
this.config = config;
this.root = this.config.getProperty("root");
}
public void run()
{
// InputStream in = null;
OutputStream out = null;
try
{
out = socket.getOutputStream();
PrintWriter writer = new PrintWriter(out, true);
BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
String request = reader.readLine();
writer.println("HTTP/1.1 200 OK");
writer.println("Content-Type: text/html");
writer.println();
// Search for filename
int slash = request.indexOf("/"); //find first occurrence of slash
int emptySpace = request.indexOf(" ", slash); //find first space after slash
String filename = request.substring(slash, emptySpace); //return filename
// writer.println("<b>" + filename + "</b>");
String pathname = "";
try
{
pathname = (filename == "/") ? root + filename : root;
// System.out.println(filename);
URL url = new URL(pathname);
URLConnection urlc = url.openConnection();
BufferedReader in = new BufferedReader(
new InputStreamReader(
urlc.getInputStream()));
String line;
while ((line = in.readLine()) != null)
{
writer.println(line);
}
in.close();
}
catch (MalformedURLException e)
{
System.err.println("Don't know about host: " + pathname);
System.exit(1);
}
catch (IOException e)
{
System.err.println("Couldn't get I/O for "
+ "the connection to: " + pathname);
System.exit(1);
}
// reader.close();
writer.close();
socket.close();
}
catch(IOException e)
{
System.out.println("Error: " + e);
}
finally
{
try
{
// in.close() ;
out.close() ;
socket.close();
}
catch(IOException e)
{
System.out.println("Error: " + e);
}
}
}
}
謝謝。你能指出一些能引導我如何從URL輸入圖像並輸出到瀏覽器的東西,就像我在這裏做的那樣?我嘗試過搜索谷歌,但找不到任何東西=/ –
@JohnathanAu:從http://stackoverflow.com/questions/43157開始,瞭解'Reader'和'InputStream'之間的區別。 –