Java-Buddy

The example implement HttpServer to download image.

package java_httpserver;
import com.sun.net.httpserver.Headers;
import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpServer;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
 *
 * @web http://java-buddy.blogspot.com/
 */
public class Java_HttpServer {
 
 static final int responseCode_OK = 200;
 public static void main(String[] args) {
 try {
 HttpServer httpServer = HttpServer.create(new InetSocketAddress(8000), 0);
 httpServer.createContext("/", new MyHttpHandler());
 httpServer.createContext("/image", new GetHttpHandler());
 httpServer.setExecutor(null);
 httpServer.start();
 } catch (IOException ex) {
 Logger.getLogger(Java_HttpServer.class.getName()).log(Level.SEVERE, null, ex);
 }
 }
 
 static class MyHttpHandler implements HttpHandler{
 @Override
 public void handle(HttpExchange he) throws IOException {
 
 String response = "Hello from java-buddy";
 he.sendResponseHeaders(responseCode_OK, response.length());
 
 OutputStream outputStream = he.getResponseBody();
 outputStream.write(response.getBytes());
 outputStream.close();
 }
 }
 
 static class GetHttpHandler implements HttpHandler{
 @Override
 public void handle(HttpExchange he) throws IOException {
 Headers headers = he.getResponseHeaders();
 headers.add("Content-Type", "image/png");
 
 File file = new File ("duke.png");
 byte[] bytes = new byte [(int)file.length()];
 System.out.println(file.getAbsolutePath());
 System.out.println("length:" + file.length());
 
 FileInputStream fileInputStream = new FileInputStream(file);
 BufferedInputStream bufferedInputStream = new BufferedInputStream(fileInputStream);
 bufferedInputStream.read(bytes, 0, bytes.length);
 he.sendResponseHeaders(responseCode_OK, file.length());
 OutputStream outputStream = he.getResponseBody();
 outputStream.write(bytes, 0, bytes.length);
 outputStream.close();
 }
 }
 
}

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