JSON响应以文本形式返回

Question

我在我的java servlet中编写了如下JSON响应,其中JObject是创建的JSON对象

response.setContentType("application/json; charset=UTF-8");
PrintWriter printout = response.getWriter();
printout.print(JObject);
printout.flush();

但它在接收方以文本/普通方式收到

[Server: Apache-Coyote/1.1, ETag: W/"XXXXXXXXXX", Last-Modified: Tue, 04 Jun 2013 10:42:31 GMT, Content-Type: text/plain, Content-Length: 2573, Date: Tue, 04 Jun 2013 10:44:01 GMT]

如何获得确切的JSON响应？如果我JSON在同一台机器上编写响应,即可获取JSON数据.但是如果我JSON在另一台服务器上编写响应,它会返回text/plain.

这是JObject:

JSONObject JObject = new JSONObject(); 
JObject.put("Response", "1"); 
JObject.put("Message", "Client unauthorized"); 

Answer 1

我不确定你在servlet中确切的代码是什么.但是我已经创建了一个示例Servlet,并使用相同的上述代码返回了Json输出.

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        response.setContentType("application/json; charset=UTF-8");
        PrintWriter printout = response.getWriter();

        JSONObject JObject = new JSONObject(); 
        JObject.put("Response", "1"); 
        JObject.put("Message", "Client unauthorized"); 

        printout.print(JObject);
        printout.flush();
            // Or
            // printout.write(JObject.toString()); 
    }

我{"Message":"Client unauthorized","Response":"1"}在浏览器上得到了输出.

这是拍摄的结果: