程式碼如下：

        String url="所給外部介面的url";
        //建立連線物件
        HttpClient httpClient = new HttpClient();
        //建立請求
        PostMethod method = new PostMethod(url);
        //設定請求頭格式為json格式
        RequestEntity entity=new StringRequestEntity(json,"application/json","UTF-8");
        //設定請求體資訊
        method.setRequestEntity(entity);
        //設定請求頭資訊
 

        method.setRequestHeader("APPKEY", "C6C6E17AC153ED8DF8D61207");
        //建立連線
        httpClient.executeMethod(method);
        //獲取返回資訊
        InputStream in = method.getResponseBodyAsStream();
         InputStreamReader isr = new InputStreamReader(in, "UTF-8");
             char[] b = new char
 
[4096];
             for(int n; (n = isr.read(b)) != -1;) {
                         sb.append(new String(b, 0, n));
                     }
              String returnStr = sb.toString();