/**
	 * @desc 生成xml報(bào)文且轉(zhuǎn)換為字符串
	 * @return
	 */
	public String xmlToString() {
		StringBuffer sendStr = new StringBuffer();
		// 以下為添加的xml信息
		sendStr.append("<?xml version=\"1.0\" encoding=\"utf-8\"?>");

		sendStr.append("<request_data>");
		sendStr.append("<request_token>BCDBCD</request_token>");
		sendStr.append("<request_cardNum>62284801912705</request_cardNum>");
		sendStr.append("<request_name>張飛</request_name>");
		sendStr.append("<request_pass>123123</request_pass>");
		sendStr.append("<request_time>"+new Dates().CurrentYMDHSMTime()+"</request_time>");

		sendStr.append("<monery_count>200.00</monery_count>");
		sendStr.append("<shop_name>吉野家</shop_name>");
		sendStr.append("<shop_id>JYJ</shop_id>");
		sendStr.append("<sale_no>"+UUID.randomUUID().toString()+"</sale_no>");
		sendStr.append("</request_data>");
		// 創(chuàng)建字符串用于返回
		String str = sendStr.toString();
		return str;
	}

/**
	 * @desc 將xml轉(zhuǎn)為流寫(xiě)入
	 * @param servletConnection
	 * @throws IOException 
	 */
	public void xmlWriteStream(HttpURLConnection servletConnection) throws IOException {
		// 創(chuàng)建流,寫(xiě)入xml數(shù)據(jù)
		OutputStream ouput = servletConnection.getOutputStream();
		// 調(diào)用方法獲取xml字符串
		String str = xmlToString();
		System.out.println(str);
		// 將xml字符串轉(zhuǎn)為btye數(shù)組寫(xiě)入流
		ouput.write(str.getBytes("UTF-8"));
		ouput.flush();// 刷新流
		ouput.close();// 關(guān)閉流
	}

/**
	 * @desc 創(chuàng)建客戶端與服務(wù)端的連接并且設(shè)置發(fā)送報(bào)文的一些屬性
	 * @return
	 * @throws IOException 
	 */
	public HttpURLConnection cerateServletUrl() throws IOException {
		// 服務(wù)端地址
		URL uploadServlet = new URL("http://localhost:1023/BaoWenServer/xmlServlet.do");
		// 創(chuàng)建連接
		HttpURLConnection servletConnection = (HttpURLConnection) uploadServlet.openConnection();
		// 設(shè)置連接參數(shù)
		servletConnection.setRequestMethod("POST"); // 請(qǐng)求類型為post
		servletConnection.setDoOutput(true); // 是否可讀
		servletConnection.setDoInput(true); // 是否可寫(xiě)
		servletConnection.setAllowUserInteraction(true); // 是否可交互
		return servletConnection;
	}

/**
	 * @desc 獲取服務(wù)端反饋回來(lái)的結(jié)果
	 * @param servletConnection
	 * @throws IOException
	 */
	public void getResponseResult(HttpURLConnection servletConnection)
			throws IOException {
	
		System.out.println("===============**服務(wù)端的返回值**==================");
		// 獲取返回的數(shù)據(jù)
		InputStream inputStream = servletConnection.getInputStream();//獲取反饋回來(lái)的流
		//創(chuàng)建一個(gè)緩沖讀取的reader對(duì)象
		BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
		//創(chuàng)建一個(gè)能夠承接返回來(lái)值得sb
		StringBuffer sb = new StringBuffer();
 //創(chuàng)建一個(gè)能夠臨時(shí)存儲(chǔ)讀取一行信息的變量
		String strMessage = "";
		//開(kāi)始循環(huán)讀取返回的流信息
		while ((strMessage = reader.readLine()) != null) {
			sb.append(strMessage);//將返回的流的信息逐行的壓如到sb中
		}

		System.out.println("接收返回值:" + sb);
	}

/**
	 * @throws IOException 
	 * @desc 用于調(diào)用方法發(fā)送報(bào)文的方法
	 */
	public void sendMessage() throws IOException {
		try {
			System.out.println("=================開(kāi)始發(fā)送報(bào)文=================");
			// 建立連接
			HttpURLConnection servletConnection = cerateServletUrl();
			// 寫(xiě)入數(shù)據(jù)
			xmlWriteStream(servletConnection);
			// 獲取返回?cái)?shù)據(jù)
			getResponseResult(servletConnection);
		} catch (java.net.ConnectException e) {
			System.out.println("客戶端與服務(wù)端連接異常，請(qǐng)?jiān)俅螄L試");
		}
	}

request.setCharacterEncoding("utf-8");
		response.setCharacterEncoding("utf-8");

//----------------通過(guò)request.getInputStream()獲取輸入的流----------------------
	// 指定每次8kb
	final int BUFFER_SIZE = 8 * 1024;
	byte[] buffer = new byte[BUFFER_SIZE];
	// 獲取輸出流,與客戶端的輸出流相對(duì)應(yīng)
	ServletInputStream sis = request.getInputStream();
//	System.out.println("sis:"+sis);
			
	int length = 0;
	// 創(chuàng)建字節(jié)輸出流
	ByteArrayOutputStream baos = new ByteArrayOutputStream();

	do {
		length = sis.read(buffer);
		if (length > 0) {
			// 寫(xiě)入至字節(jié)輸出流
			baos.write(buffer, 0, length);
		}
	} while (length * 2 == BUFFER_SIZE);
	// 把字節(jié)輸出流轉(zhuǎn)為字符串,得到客戶端發(fā)送的數(shù)據(jù),即為報(bào)文
	String bodyData = new String(baos.toByteArray());

<?xml version="1.0" encoding="utf-8"?>
<request_data>
	<request_token>BCDBCD</request_token>
	<request_cardNum>62284801912705</request_cardNum>
	<request_name>張飛</request_name>
	<request_pass>123123</request_pass>
	<request_time>2021年01月25日 14:51:52</request_time>
	<monery_count>200.00</monery_count>
	<shop_name>吉野家</shop_name>
	<shop_id>JYJ</shop_id>
	<sale_no>fc4c66dc-b54b-4052-89c1-902be7569f18</sale_no>
</request_data>

// 獲取報(bào)文之后,開(kāi)始解析報(bào)文,即為解析Xml
	//1.初始化jdk中的用來(lái)解析xml的dom工廠
	DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
	//2:獲得具體的dom解析器
	DocumentBuilder db = dbf.newDocumentBuilder();
	//3: 解析一個(gè)xml文檔，獲得Document對(duì)象（根結(jié)點(diǎn)）
	InputSource is = new InputSource(new StringReader(bodyData));
		
	Document document = null;
	try{
		document = db.parse(is);//將流轉(zhuǎn)換成document對(duì)象
	}catch(Exception e){			
		return ;
	}

//通過(guò)抓取根節(jié)點(diǎn)進(jìn)而獲取子節(jié)點(diǎn)
	NodeList list = document.getElementsByTagName("request_data");
	Map<String, Object> map = new HashMap<String, Object>();//將抓取之后獲得到的值存在map中
	XmlServiceImpl service = new XmlServiceImpl();
	for (int i = 0; i < list.getLength(); i++) {
		Element element = (Element) list.item(i);//通過(guò)item(i)獲取根節(jié)點(diǎn)下的每一個(gè)子節(jié)點(diǎn)
		//1.識(shí)別碼
		String request_token = element.getElementsByTagName("request_token").item(0).getFirstChild().getNodeValue();
		map.put("request_token", request_token);

		//2.卡號(hào)
		String request_cardNum = element.getElementsByTagName("request_cardNum").item(0).getFirstChild().getNodeValue();
		map.put("request_cardNum", request_cardNum);

		//3.持卡人姓名
		String request_name = element.getElementsByTagName("request_name").item(0).getFirstChild().getNodeValue();
		map.put("request_name", request_name);

		//4.該卡的密碼
		String request_pass = element.getElementsByTagName("request_pass").item(0).getFirstChild().getNodeValue();
		map.put("request_pass", request_pass);

		//5.本次消費(fèi)請(qǐng)求的時(shí)間
		String request_time = element.getElementsByTagName("request_time").item(0).getFirstChild().getNodeValue();
		map.put("request_time", request_time);
				
		//6.本次消費(fèi)的金額
		String monery_count = element.getElementsByTagName("monery_count").item(0).getFirstChild().getNodeValue();
		map.put("monery_count", monery_count);
				
		 
		//7.本次消費(fèi)到的商家的名字
		String shop_name = element.getElementsByTagName("shop_name").item(0).getFirstChild().getNodeValue();
		map.put("shop_name", shop_name);
									
				
		//8.本次消費(fèi)到的商家的id
		String shop_id = element.getElementsByTagName("shop_id").item(0).getFirstChild().getNodeValue();
		map.put("shop_id", shop_id);
								
		//9.本次消費(fèi)到的流水單號(hào)
		String sale_no = element.getElementsByTagName("sale_no").item(0).getFirstChild().getNodeValue();
		map.put("sale_no", sale_no);		 			 	
	}

{request_name=張飛, shop_id=JYJ, request_time=2021年01月25日 14:51:52, request_token=BCDBCD, monery_count=200.00, sale_no=fc4c66dc-b54b-4052-89c1-902be7569f18, request_cardNum=62284801912705, shop_name=吉野家, request_pass=123123}

// 要返回的報(bào)文
	StringBuffer resultBuffer = new StringBuffer();
	resultBuffer.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
	resultBuffer.append("<request_data>");
	resultBuffer.append("<request_name>"+request_name+"</request_name>");
	resultBuffer.append("<request_cardNum>"+request_cardNum+"</request_cardNum>");
	resultBuffer.append("<request_time>"+new Dates().CurrentYMDHSMTime()+"</request_time>");
	resultBuffer.append("<shop_name>"+shop_name+"</shop_name>");
	resultBuffer.append("<sale_no>"+sale_no+"</sale_no>");
	resultBuffer.append("<request_token>成功了</request_token>");
	resultBuffer.append("</request_data>");
	 // 設(shè)置發(fā)送報(bào)文的格式
	response.setContentType("text/xml");
	response.setCharacterEncoding("UTF-8");
						 
	PrintWriter out = response.getWriter();
	out.println(resultBuffer.toString()); 
	out.flush();
	out.close();