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java - 在测试 servlet 时在我的浏览器输出中获取字符串

转载 作者：行者123 更新时间：2023-11-28 22:56:49 24 4
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我正在运行以下 servlet，我在浏览器上得到了一些奇怪的输出。该程序运行良好，没有任何错误，但由于某种原因，out.println(Add_To_Queue("abc") 行的输出,"xyz","pqr")); 正在显示以java字符串的形式，如下代码所示:

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        try {
            out.println("<!DOCTYPE> html");  // HTML 5
            out.println("<html><head>");
            out.println("<meta http-equiv='Content-Type' content='text/html; charset=UTF-8'>");
            out.println(Test_Servlet("abc","xyz","pqr"));
            out.println("<head><title>TEST SERVLET API Call</title></head>");
            out.println("<body>");
            out.println("<h3>TEST SERVLET</h3>");

            // Tabulate the request information 
            out.println("</body></html>");
        }   
        finally {
            out.close();  // Always close the output writer
        }
    }

      public static Object Test_Servlet(String FirstString,String Secondstring,String ThirdString) throws IOException {
        String accessKey = "myaccesskey";
        String secretKey = "mysecretkey";
        String uRLCppList = "http://myurl.com";
        String method = "POST";
        java.util.Date currentTime = new java.util.Date();
        SimpleDateFormat sdf = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss z");

        // Give it to me in GMT time.
        sdf.setTimeZone(TimeZone.getTimeZone("GMT"));
        String dateTimeString = sdf.format(currentTime);

        String signature = generateSignature(method, secretKey, dateTimeString);
        String authorization = accessKey + ":" + signature;
        Map<String, String> params = new HashMap<String, String>();

        params.put("Content of first String", FirstString);
        params.put("Content of Second String", Secondstring);
        params.put("Content of Third String", ThirdString);

        String[] result = sendHttpRequest(uRLCppList, "POST", params, dateTimeString, authorization);

        return result;
    }

这是浏览器输出:

html [Ljava.lang.String;@430bc84a
TEST SERVLET

我正在使用 JDK 8、ApacheTomcat 6、Netbeans 7.4 进行部署。我怀疑，在 Test_Servlet 方法中定义的变量 result 中返回的结果没有在 Web 浏览器上正确显示。

SendHttpRequest 方法的附加代码:

public static String[] sendHttpRequest(String requestUrl, String method, Map<String, String> params, String dateTimeString, String authorization) throws IOException {
        List<String> response = new ArrayList<String>();
        StringBuffer requestParams = new StringBuffer();

        if (params != null && params.size() > 0) {
            Iterator<String> paramIterator = params.keySet().iterator();
            while (paramIterator.hasNext()) {
                String key = paramIterator.next();
                String value = params.get(key);
                requestParams.append(URLEncoder.encode(key, "UTF-8"));
                requestParams.append("=").append(URLEncoder.encode(value, "UTF-8"));
                requestParams.append("&");
            }
        }
        URL url = new URL(requestUrl);
        URLConnection urlConn = url.openConnection();
        urlConn.setRequestProperty("accept", "application/json");
        urlConn.setRequestProperty("datetime", dateTimeString);
        urlConn.setRequestProperty("authorization", authorization);
        urlConn.setUseCaches(false);

        // the request will return a response
        urlConn.setDoInput(true);

        if ("POST".equals(method)) {
            // set request method to POST
            urlConn.setDoOutput(true);
        } else {
            // set request method to GET
            urlConn.setDoOutput(false);
        }

        if ("POST".equals(method) && params != null && params.size() > 0) {
            OutputStreamWriter writer = new OutputStreamWriter(urlConn.getOutputStream());
            writer.write(requestParams.toString());
            writer.flush();  
        }

        // reads response, store line by line in an array of Strings
        BufferedReader reader = new BufferedReader(new InputStreamReader(urlConn.getInputStream()));

        String line = "";
        while ((line = reader.readLine()) != null) {
            response.add(line);
        }
        reader.close();
        return (String[]) response.toArray(new String[0]);
    }

最佳答案

您的 Test_Servlet 方法返回一个 String 数组。在数组上调用 toString() 的结果是您获得的字符串，其中包括类型和对象 ID。

不确定您到底想做什么，但您可以通过遍历返回的数组来将字符串输出。

关于java - 在测试 servlet 时在我的浏览器输出中获取字符串，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/25047075/

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