Question

当我将我的名字从applet发送到servlet时，我面临“java.net.UnknownServiceException：protocol不支持输出”问题。我试过Sending object to Servlet throws an error I cant resolve，但它没有解决我的问题。我的applet代码是：

new Date(2015, 12, 10)

，servlet代码是：

import java.io.*;

import javax.servlet.ServletException;
import javax.servlet.http.*;

public class AppletToServlet extends HttpServlet {
// Getting a String object from the applet and send it back.
    public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        try {
            response.setContentType("application/x-java-serialized-object");
            InputStream inputStream = request.getInputStream();
            ObjectInputStream inputFromApplet = new ObjectInputStream(inputStream);
            String string = (String) inputFromApplet.readObject();
// getting string value and passing to applet
OutputStream outputStream = response.getOutputStream();
ObjectOutputStream objectOutputStream = new ObjectOutputStream(outputStream);
objectOutputStream.writeObject(string);
objectOutputStream.flush();
objectOutputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

我几乎到处搜索但无法解决。

Answer 1

你在哪里运行applet？您是否真的将其嵌入到页面中并通过某种类型的Web服务器请求它？

代码

 URL urlServlet = new URL(getCodeBase(), "applettoservlet");

如果您正在从Web /应用程序服务器提供的页面运行applet，

将仅按预期工作。尝试添加

System.out.println(urlServlet);

检查正在使用的网址。

尝试将applet与servlet通信时出现协议错误

1 个答案: