Question

我一直收到这个错误，我真的不知道为什么。我尝试过不同的网址但我仍然遇到同样的错误。

java.net.MalformedURLException java.net.URL。（未知来源）

public class ProxyServlet extends HttpServlet {

private String PostUrl = "http://localhost:8080/myProxy/myServlet";

private static final long serialVersionUID = 1L;

public ProxyServlet() {
    super();
    }

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

    System.out.println("Parameters retreived...");
    // map parameters to properties in config file and set response
    Map();
    }

private void Map() throws IOException{


        String urlParameters = "topic="+topic+"&item="+item+"&period="+period+";
        URL url = new URL(PostUrl);
        HttpURLConnection conn = (HttpURLConnection)url.openConnection();
        System.out.println("Connection made to " + PostUrl);
        conn.setDoOutput(true);
        conn.setInstanceFollowRedirects(true);
        conn.setRequestMethod("POST");
        conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
        conn.setRequestProperty("charset", "utf-8");

        OutputStream out = null;

        try{
            System.out.println("Writing data to output stream...");
            out = conn.getOutputStream();
            out.write(urlParameters.getBytes());
            out.close();
            System.out.println("All done!!!");
        }

        catch(IOException e){
            e.printStackTrace();
        }
    }
}

任何帮助都将不胜感激!!

谢谢！

Answer 1

此代码无法编译。

您的网址无效。不能假设它是如上所示。

此外，您必须URLEncode参数名称和值。

java.net.MalformedURLException java.net.URL。<init>（未知来源）</init>

1 个答案: