java如何从安卓读取servlet中的数据？

1 周，4 日 Questions & Answers 159

我是处理Servlet的新手，曾试图从安卓应用程序向我的Servlet发送数据，但不知道在我的Servlet中读取数据的确切方式？在安卓系统中，我使用这些功能发送数据：

URL url = new URL("http://example.appspot.com/testservlet"); HttpURLConnection conn = (HttpURLConnection)url.openConnection(); conn.setReadTimeout(10000); conn.setConnectTimeout(15000); conn.setRequestMethod("POST"); conn.setDoInput(true); conn.setDoOutput(true); Uri.Builder builder = new Uri.Builder() .appendQueryParameter("firstParam", "Rahul") .appendQueryParameter("secondParam", "Anil") .appendQueryParameter("thirdParam", "Rohan"); String query = builder.build().getEncodedQuery(); OutputStream os = conn.getOutputStream(); BufferedWriter writer = new BufferedWriter( new OutputStreamWriter(os, "UTF-8")); writer.write(query); writer.flush(); writer.close(); os.close(); conn.connect(); }catch(Exception e){ Exception exep= e; Log.d("Test",exep+""); return false; } Log.d("Test","Succesfully") return true;

在servlet中，我写道：

@Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { resp.setContentType("text/plain"); resp.setContentType("text/plain"); String request=req.getParameter("firstParam"); resp.getWriter().println("firstParam ::::::::::"+request); }

如果不正确，请提供一些示例，例如发送字符串并在servlet中获取它？。先发制人

# 1 楼答案

我找到了一个示例，它对您很有用：

https://github.com/wso2-attic/commons/blob/master/qa/qa-artifacts/app-server/as-5.2.0/myfaces/javaee7/servlet/non-blocking-io-read-war/src/main/java/org/glassfish/servlet/non_blocking_io_read_war/ClientTest.java#L93

protected void processRequest(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    response.setContentType("text/html;charset=UTF-8");

    PrintWriter out = response.getWriter();

    out.println("<html>");
    out.println("<head>");
    out.println("<title>Non-blocking-read-war</title>");
    out.println("</head>");
    out.println("<body>");

    String urlPath = "http://"
            + request.getServerName()
            + ":" + request.getLocalPort() //default http port is 8080
            + request.getContextPath()
            + "/ServerTest";

    URL url = new URL(urlPath);

    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setDoOutput(true);
    conn.setRequestMethod("POST");
    conn.setChunkedStreamingMode(2);
    conn.setRequestProperty("Content-Type", "text/plain");
    conn.connect();

    try {
        output = conn.getOutputStream();
        // Sending the first part of data to server
        String firstPart = "Hello";
        out.println("Sending to server: " + firstPart + "</br>");
        out.flush();
        writeData(output, firstPart);

        Thread.sleep(2000);

        // Sending the second part of data to server
        String secondPart = "World";
        out.println("Sending to server: " + secondPart + "</br></br>");
        out.flush();
        writeData(output, secondPart);

        // Getting the echo data from server
        input = conn.getInputStream();
        printEchoData(out, input);

        out.println("Please check server log for detail");
        out.flush();
    } catch (IOException ioException) {
        Logger.getLogger(ReadListenerImpl.class.getName()).log(Level.SEVERE,
                "Please check the connection or url path", ioException);
    } catch (InterruptedException interruptedException) {
        Logger.getLogger(ReadListenerImpl.class.getName()).log(Level.SEVERE,
                "Thread sleeping error", interruptedException);
    } finally {
        if (input != null) {
            try {
                input.close();
            } catch (Exception ex) {
            }
        }
        if (output != null) {
            try {
                output.close();
            } catch (Exception ex) {
            }
        }
    }

    out.println("</body>");
    out.println("</html>");

}

private Document sendRequest(String requestXML) throws Exception { /** // Open HTTP connection with TransitServlet URLConnection tc = null; try { tc = servletURL.openConnection(); } catch (IOException ioe) { throw(ioe); } tc.setDoOutput(true); tc.setDoInput(true); // Write request to HTTP request body OutputStreamWriter out = new OutputStreamWriter(tc.getOutputStream()); out.write(requestXML); out.flush(); */ // Read response into XML document object DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance(); DocumentBuilder docBuilder = null; Document xmlDoc = null; try { docBuilder = docBuilderFactory.newDocumentBuilder(); } catch (ParserConfigurationException pce) { throw(pce); } initializeDataField(); InputStream tcIn = null; try { tcIn = submitRequest(requestXML); xmlDoc = docBuilder.parse(tcIn); } catch (IOException ioe) { throw(ioe); } catch (SAXException saxe) { throw(saxe); } //out.close(); tcIn.close(); // Return XML document object for interpretation return(xmlDoc); }

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java如何从安卓读取servlet中的数据？

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