URL을 이용한 업로드 코드에 에러가 떠요 도와주세요

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제가 이클립스를 이용하여 파일 업로드 코드를 만들려고 하는데서버와 연결에서 문제가 생기는지 아니면 연결하는 코드에 미흡하여 에러가 뜨는지 실력이 미흡하여서 알수가 없게 되었습니다. import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; public class Test_Send { public static void main(String[] args) throws MalformedURLException,IOException { File file &#61; new File(&#34;bblock.png&#34;); File path &#61; new File(&#34;C:&#34;); URL url &#61; new URL(&#34;http://localhost:8080/WebContent/Accept_Test.jsp&#34;); //FileOutputStream os &#61; new FileOutputStream(&#34;C:\Test_one.png&#34;); String boundary &#61; &#34;cchheecckk&#34;; //쓰래기값 HttpURLConnection Conn &#61; (HttpURLConnection)url.openConnection(); Conn.setDoOutput(true); Conn.setDoInput(true); Conn.setUseCaches(false); Conn.setRequestMethod(&#34;POST&#34;); Conn.setRequestProperty(&#34;Content-type&#34;, &#34;application/octet-stream&#34;); Conn.setRequestProperty(&#34;Content-Length&#34;, String.valueOf(file.length())); byte buffer[] &#61; new byte[1024]; OutputStream os &#61; Conn.getOutputStream(); InputStream is &#61; new FileInputStream(path&#43;&#34;/&#34;&#43;file); DataOutputStream dos &#61; new DataOutputStream(os); DataInputStream dis &#61; new DataInputStream(is); os.write(buffer); dos.writeBytes(&#34;--&#34;&#43;boundary&#43;&#34;
&#34;); dos.writeBytes(&#34;Content-Disposition: form-data; data&#61;\&#34;1\&#34;;filename&#61;\&#34;&#34;&#43; file &#43;&#34;\&#34;&#34; &#43; &#34;
&#34;); dos.writeBytes(&#34;
&#34;); int count &#61; 0; while((count&#61;is.read(buffer))!&#61; -1) { dos.write(buffer); } os.flush(); is &#61; Conn.getInputStream(); System.out.println(&#34;test_ok?&#34;); System.out.println(is); } } 제 마음 같아서는 이미 데이터를 서버에 대용량으로 저장한것 같은데 아예 서버에 연결조차 되지 않습니다. Exception in thread &#34;main&#34; java.net.ConnectException: Connection refused: connect at java.net.DualStackPlainSocketImpl.connect0(Native Method) at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79) at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:345) at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) at java.net.Socket.connect(Socket.java:589) at java.net.Socket.connect(Socket.java:538) at sun.net.NetworkClient.doConnect(NetworkClient.java:180) at sun.net.www.http.HttpClient.openServer(HttpClient.java:432) at sun.net.www.http.HttpClient.openServer(HttpClient.java:527) at sun.net.www.http.HttpClient.<init>(HttpClient.java:211) at sun.net.www.http.HttpClient.New(HttpClient.java:308) at sun.net.www.http.HttpClient.New(HttpClient.java:326) at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1168) at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1104) at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:998) at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:932) at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1282) at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1257) at Test_Send.main(Test_Send.java:33) 아래와 같이 에러가 뜨는데 제 실력으로는 연결이 안된다는 것 밖에는 이해하지 못하겠습니다 조금만 도와주세요.

jstark.org · Answer

혹시 방화벽 문제는 아닌지요?

URL을 이용한 업로드 코드에 에러가 떠요 도와주세요

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