发出HTTP请求并获得HTTP响应的过程如下：

(1)定义HTTP请求HttpPut(HttpPost/HttpGet/HttpDelete)等；

(2)定义各种Header，并加入HttpPut中；

(3)定义HttpEntitty，将要发送的XML字符串加入HttpEntity，并将HttpEntity加入HttpPut；

(4)定义HttpClient，执行HttpPut，并返回HttpResponse；

(5)从HttpResponse中获得StatusCode；

(6)从HttpResponse中获得各种Header；

(7)从HttpResponse中获得HttpEntity，并获得其中的字符串输出。

代码如下：

// 修改队列参数    public static void modify_queue_attributes(){                // 定义HttpClient        HttpClient httpClient = new DefaultHttpClient();        // Uri        String hs = host + "/" + queName +"?Metaoverride=true";        // 定义HttpPut        HttpPut httpPut = new HttpPut(hs);        // 各种Header        httpPut.setHeader("Date", time);        System.out.println("Date:" + time);        httpPut.setHeader("x-mqs-version", version);        System.out.println("x-mqs-version:" + version);        httpPut.setHeader("Authorization", auth);        System.out.println("Authorization:" + auth);        httpPut.setHeader("Content-Type", content_type);        System.out.println("Content-Type:" + content_type);        // 消息体内容(XML格式)        StringBuilder req = new StringBuilder();        String s = new String("");        s = "
     ";        req.append(s);        s = "
     
      ";        req.append(s);        s = "
      
       120
      ";        req.append(s);        s = "
      
       1024
      ";        req.append(s);        s = "
      
       120
      ";        req.append(s);        s = "
      
       60
      ";        req.append(s);        s = "
     ";        req.append(s);        System.out.println();        System.out.println(req);        // 定义HttpEntity        HttpEntity entity;        try{            // StringEntity            entity = new StringEntity(req.toString());            // 为HttpPut设置Entity            httpPut.setEntity(entity);                // HttpClient执行HttpPut，并返回HttpResponse            HttpResponse httpResponse = httpClient.execute(httpPut);            // 获得StatusCode            int statusCode = httpResponse.getStatusLine().getStatusCode();            System.out.println("Status Code: " + statusCode);            // 获得HttpResponse的各种Header            Header[] header;            header = httpResponse.getHeaders("Content-Length");            if (header.length != 0){                // System.out.println(header[0].toString());            }            header = httpResponse.getHeaders("Connection");            if (header.length != 0){                // System.out.println(header[0].toString());            }            header = httpResponse.getHeaders("Date");            if (header.length != 0){                // System.out.println(header[0].toString());            }            header = httpResponse.getHeaders("Server");            if (header.length != 0){                // System.out.println(header[0].toString());            }            header = httpResponse.getHeaders("x-mqs-request-id");            if (header.length != 0){                // System.out.println(header[0].toString());            }            header = httpResponse.getHeaders("x-mqs-version");            if (header.length != 0){                // System.out.println(header[0].toString());            }                        // 获得HttpResponse的HttpEntity并以字符串形式输出            HttpEntity httpEntity = httpResponse.getEntity();            if (httpEntity != null){                InputStream instreams = httpEntity.getContent();                 String str = ConvertStreamToString(instreams);                System.out.println("Response:" + "\n" + str);            }        }        catch(Exception e){            System.out.println("Error=" + e.toString());        }            }

返回结果为：

Status Code: 403Response:
     
       
      SignatureDoesNotMatch  
      
       The request signature we calculated does not match the signature you provided. Check your key and signing method.
        
      
       53D60FE4048A936A361D8ABA
        
      
       http://huvaw6yih3.mqs-cn-hangzhou.aliyuncs.com