調用遠程Java Servlet

Question

我有一個保存表單的jsp頁面，它應該將表單數據發送到遠程servlet，然後將其作爲XML進行計算。它可以工作，但目前我正在創建一個實例和調度程序，它只能與本地servlet一起工作，而我希望它能夠與遠程servlet一起工作。

我之前被告知HTTPClient會這樣做，但這件事已經變得如此頭疼，而且對於我想要做的事情來說這似乎是一個完全矯枉過正的事情。必須有一些簡單的方法，而不是用所有這些jar組件和依賴關係來解決問題？

如果可能的話請給示例代碼，我真的一個完整的新手到Java，更是一個PHP的傢伙：P

Answer 1

想通了與一些在線資源的幫助。必須首先收集提交的值（request.getParamater（「bla」）），構建數據字符串（URLEnconder），啓動URLConnection並告訴它打開指定URL的連接，啓動OutputStreamWriter，然後告訴它添加數據（類URLEncoder）的字符串，然後最後讀取數據，並打印...

下面是代碼的要點：

String postedVariable1 = request.getParameter("postedVariable1"); 
String postedVariable2 = request.getParameter("postedVariable2"); 

//Construct data here... build the string like you would with a GET URL  
String data = URLEncoder.encode("postedVariable1", "UTF-8") + "=" + URLEncoder.encode(postedVariable1, "UTF-8"); 
data += "&" + URLEncoder.encode("postedVariable2", "UTF-8") + "=" + URLEncoder.encode(submitMethod, "UTF-8"); 

    try { 
     URL calculator = new URL("http://remoteserver/Servlet"); 
     URLConnection calcConnection = calculator.openConnection(); 
     calcConnection.setDoOutput(true); 
     OutputStreamWriter outputLine = new OutputStreamWriter(calcConnection.getOutputStream()); 
     outputLine.write(data); 
     outputLine.flush(); 


     // Get the response 
     BufferedReader streamReader = new BufferedReader(new InputStreamReader(calcConnection.getInputStream())); 
     String line; 
     //streamReader = holding the data... can put it through a DOM loader? 
     while ((line = streamReader.readLine()) != null) { 
      PrintWriter writer = response.getWriter(); 
      writer.print(line); 
     } 
     outputLine.close(); 
     streamReader.close(); 

    } catch (MalformedURLException me) { 
     System.out.println("MalformedURLException: " + me); 
    } catch (IOException ioe) { 
     System.out.println("IOException: " + ioe); 
    }