采用微信提供的Native模式二方式進(jìn)行開發(fā)，模式二與模式一相比，流程更為簡(jiǎn)單，不依賴設(shè)置的回調(diào)支付URL。商戶后臺(tái)系統(tǒng)先調(diào)用微信支付的統(tǒng)一下單接口，微信后臺(tái)系統(tǒng)返回鏈接參數(shù)code_url，商戶后臺(tái)系統(tǒng)將code_url值生成二維碼圖片，用戶使用微信客戶端掃碼后發(fā)起支付。注意：code_url有效期為2小時(shí)，過期后掃碼不能再發(fā)起支付。
業(yè)務(wù)流程說明：
（1）商戶后臺(tái)系統(tǒng)根據(jù)用戶選購的商品生成訂單。
（2）用戶確認(rèn)支付后調(diào)用微信支付【統(tǒng)一下單API】生成預(yù)支付交易；
（3）微信支付系統(tǒng)收到請(qǐng)求后生成預(yù)支付交易單，并返回交易會(huì)話的二維碼鏈接code_url。
（4）商戶后臺(tái)系統(tǒng)根據(jù)返回的code_url生成二維碼。
（5）用戶打開微信“掃一掃”掃描二維碼，微信客戶端將掃碼內(nèi)容發(fā)送到微信支付系統(tǒng)。
（6）微信支付系統(tǒng)收到客戶端請(qǐng)求，驗(yàn)證鏈接有效性后發(fā)起用戶支付，要求用戶授權(quán)。
（7）用戶在微信客戶端輸入密碼，確認(rèn)支付后，微信客戶端提交授權(quán)。
（8）微信支付系統(tǒng)根據(jù)用戶授權(quán)完成支付交易。
（9）微信支付系統(tǒng)完成支付交易后給微信客戶端返回交易結(jié)果，并將交易結(jié)果通過短信、微信消息提示用戶。微信客戶端展示支付交易結(jié)果頁面。
（10）微信支付系統(tǒng)通過發(fā)送異步消息通知商戶后臺(tái)系統(tǒng)支付結(jié)果。商戶后臺(tái)系統(tǒng)需回復(fù)接收情況，通知微信后臺(tái)系統(tǒng)不再發(fā)送該單的支付通知。
（11）未收到支付通知的情況，商戶后臺(tái)系統(tǒng)調(diào)用【查詢訂單API】。
（12）商戶確認(rèn)訂單已支付后給用戶發(fā)貨。
WeixinPay
public class WeixinPay {
public static Logger lg= LoggerFactory.getLogger(WeixinPay.class);
private static final int BLACK = 0xff000000;
private static final int WHITE = 0xFFFFFFFF;
/**
* 獲取微信支付的二維碼地址
* @return
* @author pzh
* @throws Exception
*/
public static Map getCodeUrl(WeChatParams ps) throws Exception {
/**
* 賬號(hào)信息
*/
String appid = WeChatConfig.APPID;//微信服務(wù)號(hào)的appid
String mch_id = WeChatConfig.MCHID; //微信支付商戶號(hào)
String key = WeChatConfig.APIKEY; // 微信支付的API密鑰
String notify_url = WeChatConfig.WECHAT_NOTIFY_URL_PC;//回調(diào)地址【注意，這里必須要使用外網(wǎng)的地址】
String ufdoder_url=WeChatConfig.UFDODER_URL;//微信下單API地址
/**
* 時(shí)間字符串
*/
String currTime = PayForUtil.getCurrTime();
String strTime = currTime.substring(8, currTime.length());
String strRandom = PayForUtil.buildRandom(4) + "";
String nonce_str = strTime + strRandom;
/**
* 參數(shù)封裝
*/
SortedMap<Object,Object> packageParams = new TreeMap<Object,Object>();
packageParams.put("appid", appid);
packageParams.put("mch_id", mch_id);
packageParams.put("nonce_str", nonce_str);//隨機(jī)字符串
packageParams.put("body", ps.getBody());//支付的商品名稱
packageParams.put("out_trade_no", ps.getOut_trade_no()+nonce_str);//商戶訂單號(hào)【備注：每次發(fā)起請(qǐng)求都需要隨機(jī)的字符串，否則失敗。】
packageParams.put("total_fee", ps.getTotal_fee());//支付金額
packageParams.put("spbill_create_ip", PayForUtil.localIp());//客戶端主機(jī)
packageParams.put("notify_url", notify_url);
packageParams.put("trade_type", "NATIVE");
packageParams.put("limit_pay","no_credit");
packageParams.put("device_info","WEB");
packageParams.put("attach", ps.getAttach());//額外的參數(shù)【業(yè)務(wù)類型+會(huì)員ID+支付類型】
String sign = PayForUtil.createSign("UTF-8", packageParams,key); //獲取簽名
packageParams.put("sign", sign);
String requestXML = PayForUtil.getRequestXml(packageParams);//將請(qǐng)求參數(shù)轉(zhuǎn)換成String類型
lg.info("微信支付請(qǐng)求參數(shù)的報(bào)文"+requestXML);
String resXml = HttpUtil.postData(ufdoder_url,requestXML); //解析請(qǐng)求之后的xml參數(shù)并且轉(zhuǎn)換成String類型
Map map = XMLUtil.doXMLParse(resXml);
lg.info("微信支付響應(yīng)參數(shù)的報(bào)文"+resXml);
String result = (String) map.get("result_code");
if ("SUCCESS".equals(result)){
} else {
}
return map;
}
/**
* 將路徑生成二維碼圖片
* @author pzh
* @param content
* @param response
*/
@SuppressWarnings({ "unchecked", "rawtypes" })
public static void encodeQrcode(String content,HttpServletResponse response){
if(StringUtils.isBlank(content))
return;
MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
Map hints = new HashMap();
BitMatrix bitMatrix = null;
try {
bitMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, 250, 250,hints);
BufferedImage image = toBufferedImage(bitMatrix);
//輸出二維碼圖片流
try {
ImageIO.write(image, "png", response.getOutputStream());
} catch (IOException e) {
e.printStackTrace();
}
} catch (WriterException e1) {
e1.printStackTrace();
}
}
/**
* 類型轉(zhuǎn)換
* @author pzh
* @param matrix
* @return
*/
public static BufferedImage toBufferedImage(BitMatrix matrix) {
int width = matrix.getWidth();
int height = matrix.getHeight();
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
image.setRGB(x, y, matrix.get(x, y) == true ? BLACK : WHITE);
}
}
return image;
}
// 特殊字符處理
public static String UrlEncode(String src) throws UnsupportedEncodingException {
return URLEncoder.encode(src, "UTF-8").replace("+", "%20");
}
}
HttpUtil
public class HttpUtil {
private final static int CONNECT_TIMEOUT = 5000; // in milliseconds 連接超時(shí)的時(shí)間
private final static String DEFAULT_ENCODING = "UTF-8"; //字符串編碼
private static Logger lg= LoggerFactory.getLogger(HttpUtil.class);
public static String postData(String urlStr, String data){
return postData(urlStr, data, null);
}
/**
* post數(shù)據(jù)請(qǐng)求
* @param urlStr
* @param data
* @param contentType
* @return
*/
public static String postData(String urlStr, String data, String contentType){
BufferedReader reader = null;
try {
URL url = new URL(urlStr);
URLConnection conn = url.openConnection();
conn.setDoOutput(true);
conn.setConnectTimeout(CONNECT_TIMEOUT);
conn.setReadTimeout(CONNECT_TIMEOUT);
if(contentType != null)
conn.setRequestProperty("content-type", contentType);
OutputStreamWriter writer = new OutputStreamWriter(conn.getOutputStream(), DEFAULT_ENCODING);
if(data == null)
data = "";
writer.write(data);
writer.flush();
writer.close();
reader = new BufferedReader(new InputStreamReader(conn.getInputStream(), DEFAULT_ENCODING));
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line);
sb.append("\r\n");
}
return sb.toString();
} catch (IOException e) {
lg.info("Error connecting to " + urlStr + ": " + e.getMessage());
} finally {
try {
if (reader != null)
reader.close();
} catch (IOException e) {
}
}
return null;
}
}
MD5Util
public class MD5Util {
private static String byteArrayToHexString(byte b[]) {
StringBuffer resultSb = new StringBuffer();
for (int i = 0; i < b.length; i++)
resultSb.append(byteToHexString(b[i]));
return resultSb.toString();
}
private static String byteToHexString(byte b) {
int n = b;
if (n < 0)
n += 256;
int d1 = n / 16;
int d2 = n % 16;
return hexDigits[d1] + hexDigits[d2];
}
public static String MD5Encode(String origin, String charsetname) {
String resultString = null;
try {
resultString = new String(origin);
MessageDigest md = MessageDigest.getInstance("MD5");
if (charsetname == null || "".equals(charsetname))
resultString = byteArrayToHexString(md.digest(resultString
.getBytes()));
else
resultString = byteArrayToHexString(md.digest(resultString
.getBytes(charsetname)));
} catch (Exception exception) {
}
return resultString;
}
private static final String hexDigits[] = { "0", "1", "2", "3", "4", "5",
"6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };
}
PayForUtil
public class PayForUtil {
private static Logger lg= LoggerFactory.getLogger(PayForUtil.class);
/**
* 是否簽名正確,規(guī)則是:按參數(shù)名稱a-z排序,遇到空值的參數(shù)不參加簽名。
* @return boolean
*/
public static boolean isTenpaySign(String characterEncoding, SortedMap<Object, Object> packageParams, String API_KEY) {
StringBuffer sb = new StringBuffer();
Set es = packageParams.entrySet();
Iterator it = es.iterator();
while(it.hasNext()) {
Map.Entry entry = (Map.Entry)it.next();
String k = (String)entry.getKey();
String v = (String)entry.getValue();
if(!"sign".equals(k) && null != v && !"".equals(v)) {
sb.append(k + "=" + v + "&");
}
}
sb.append("key=" + API_KEY);
//算出摘要
String mysign = MD5Util.MD5Encode(sb.toString(), characterEncoding).toLowerCase();
String tenpaySign = ((String)packageParams.get("sign")).toLowerCase();
return tenpaySign.equals(mysign);
}
/**
* @author pzh
* @Description：sign簽名
* @param characterEncoding
* 編碼格式
* @return
*/
public static String createSign(String characterEncoding, SortedMap<Object, Object> packageParams, String API_KEY) {
StringBuffer sb = new StringBuffer();
Set es = packageParams.entrySet();
Iterator it = es.iterator();
while (it.hasNext()) {
Map.Entry entry = (Map.Entry) it.next();
String k = (String) entry.getKey();
String v = (String) entry.getValue();
if (null != v && !"".equals(v) && !"sign".equals(k) && !"key".equals(k)) {
sb.append(k + "=" + v + "&");
}
}
sb.append("key=" + API_KEY);
String sign = MD5Util.MD5Encode(sb.toString(), characterEncoding).toUpperCase();
return sign;
}
/**
* @author pzh
* @Description：將請(qǐng)求參數(shù)轉(zhuǎn)換為xml格式的string
* @param parameters
* 請(qǐng)求參數(shù)
* @return
*/
public static String getRequestXml(SortedMap<Object, Object> parameters) {
StringBuffer sb = new StringBuffer();
sb.append("<xml>");
Set es = parameters.entrySet();
Iterator it = es.iterator();
while (it.hasNext()) {
Map.Entry entry = (Map.Entry) it.next();
String k = (String) entry.getKey();
String v = (String) entry.getValue();
if ("attach".equalsIgnoreCase(k) || "body".equalsIgnoreCase(k) || "sign".equalsIgnoreCase(k)) {
sb.append("<" + k + ">" + "<![CDATA[" + v + "]]></" + k + ">");
} else {
sb.append("<" + k + ">" + v + "</" + k + ">");
}
}
sb.append("</xml>");
return sb.toString();
}
/**
* 取出一個(gè)指定長(zhǎng)度大小的隨機(jī)正整數(shù).
*
* @param length
* int 設(shè)定所取出隨機(jī)數(shù)的長(zhǎng)度。length小于11
* @return int 返回生成的隨機(jī)數(shù)。
*/
public static int buildRandom(int length) {
int num = 1;
double random = Math.random();
if (random < 0.1) {
random = random + 0.1;
}
for (int i = 0; i < length; i++) {
num = num * 10;
}
return (int) ((random * num));
}
/**
* 獲取當(dāng)前時(shí)間 yyyyMMddHHmmss
* @author chenp
* @return String
*/
public static String getCurrTime() {
Date now = new Date();
SimpleDateFormat outFormat = new SimpleDateFormat("yyyyMMddHHmmss");
String s = outFormat.format(now);
return s;
}
/**
* 獲取本機(jī)IP地址
* @author pzh
* @return
*/
public static String localIp(){
String ip = null;
Enumeration allNetInterfaces;
try {
allNetInterfaces = NetworkInterface.getNetworkInterfaces();
while (allNetInterfaces.hasMoreElements()) {
NetworkInterface netInterface = (NetworkInterface) allNetInterfaces.nextElement();
List<InterfaceAddress> InterfaceAddress = netInterface.getInterfaceAddresses();
for (InterfaceAddress add : InterfaceAddress) {
InetAddress Ip = add.getAddress();
if (Ip != null && Ip instanceof Inet4Address) {
ip = Ip.getHostAddress();
}
}
}
} catch (SocketException e) {
lg.warn("獲取本機(jī)Ip失敗:異常信息:"+e.getMessage());
}
return ip;
}
}
WeChatConfig
public class WeChatConfig {
/**
* 微信服務(wù)號(hào)APPID
*/
public static String APPID="";
/**
* 微信支付的商戶號(hào)
*/
public static String MCHID="";
/**
* 微信支付的API密鑰
*/
public static String APIKEY="";
/**
* 微信支付成功之后的回調(diào)地址【注意：當(dāng)前回調(diào)地址必須是公網(wǎng)能夠訪問的地址】
*/
public static String WECHAT_NOTIFY_URL_PC="http://****/wechat_notify_url_pc";
/**
* 微信統(tǒng)一下單API地址
*/
public static String UFDODER_URL="https://api.mch.weixin.qq.com/pay/unifiedorder";
/**
* true為使用真實(shí)金額支付，false為使用測(cè)試金額支付（1分）
*/
public static String WXPAY="false";
}
WeChatParams
public class WeChatParams {
private String total_fee;//訂單金額【備注：以分為單位】
private String body;//商品名稱
private String product_id;//商品ID
private String out_trade_no;//商戶訂單號(hào)
private String attach;//附加參數(shù)
private String memberid;//會(huì)員ID
public String getTotal_fee() {
return total_fee;
}
public void setTotal_fee(String total_fee) {
this.total_fee = total_fee;
}
public String getBody() {
return body;
}
public void setBody(String body) {
this.body = body;
}
public String getOut_trade_no() {
return out_trade_no;
}
public void setOut_trade_no(String out_trade_no) {
this.out_trade_no = out_trade_no;
}
public String getAttach() {
return attach;
}
public void setAttach(String attach) {
this.attach = attach;
}
public String getMemberid() {
return memberid;
}
public void setMemberid(String memberid) {
this.memberid = memberid;
}
public String getProduct_id() {
return product_id;
}
public void setProduct_id(String product_id) {
this.product_id = product_id;
}
}
XMLUtil
public class XMLUtil {
/**
* 解析xml,返回第一級(jí)元素鍵值對(duì)。如果第一級(jí)元素有子節(jié)點(diǎn)，則此節(jié)點(diǎn)的值是子節(jié)點(diǎn)的xml數(shù)據(jù)。
* @param strxml
* @return
* @throws JDOMException
* @throws IOException
*/
public static Map doXMLParse(String strxml) throws JDOMException, IOException {
strxml = strxml.replaceFirst("encoding=\".*\"", "encoding=\"UTF-8\"");
if(null == strxml || "".equals(strxml)) {
return null;
}
Map m = new HashMap();
InputStream in = new ByteArrayInputStream(strxml.getBytes("UTF-8"));
SAXBuilder builder = new SAXBuilder();
Document doc = builder.build(in);
Element root = doc.getRootElement();
List list = root.getChildren();
Iterator it = list.iterator();
while(it.hasNext()) {
Element e = (Element) it.next();
String k = e.getName();
String v = "";
List children = e.getChildren();
if(children.isEmpty()) {
v = e.getTextNormalize();
} else {
v = XMLUtil.getChildrenText(children);
}
m.put(k, v);
}
//關(guān)閉流
in.close();
return m;
}
/**
* 獲取子結(jié)點(diǎn)的xml
* @param children
* @return String
*/
public static String getChildrenText(List children) {
StringBuffer sb = new StringBuffer();
if(!children.isEmpty()) {
Iterator it = children.iterator();
while(it.hasNext()) {
Element e = (Element) it.next();
String name = e.getName();
String value = e.getTextNormalize();
List list = e.getChildren();
sb.append("<" + name + ">");
if(!list.isEmpty()) {
sb.append(XMLUtil.getChildrenText(list));
}
sb.append(value);
sb.append("</" + name + ">");
}
}
return sb.toString();
}
}
wechat_notify_url_pc
/**
* pc端微信支付之后的回調(diào)方法
* @param request
* @param response
* @throws Exception
*/
@RequestMapping(value="wechat_notify_url_pc",method=RequestMethod.POST)
public void wechat_notify_url_pc(HttpServletRequest request,HttpServletResponse response) throws Exception{
//讀取參數(shù)
InputStream inputStream ;
StringBuffer sb = new StringBuffer();
inputStream = request.getInputStream();
String s ;
BufferedReader in = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"));
while ((s = in.readLine()) != null){
sb.append(s);
}
in.close();
inputStream.close();
//解析xml成map
Map<String, String> m = new HashMap<String, String>();
m = XMLUtil.doXMLParse(sb.toString());
//過濾空 設(shè)置 TreeMap
SortedMap<Object,Object> packageParams = new TreeMap<Object,Object>();
Iterator<String> it = m.keySet().iterator();
while (it.hasNext()) {
String parameter = it.next();
String parameterValue = m.get(parameter);
String v = "";
if(null != parameterValue) {
v = parameterValue.trim();
}
packageParams.put(parameter, v);
}
// 微信支付的API密鑰
String key = WeChatConfig.APIKEY; // key
lg.info("微信支付返回回來的參數(shù)："+packageParams);
//判斷簽名是否正確
if(PayForUtil.isTenpaySign("UTF-8", packageParams,key)) {
//------------------------------
//處理業(yè)務(wù)開始
//------------------------------
String resXml = "";
if("SUCCESS".equals((String)packageParams.get("result_code"))){
// 這里是支付成功
//執(zhí)行自己的業(yè)務(wù)邏輯開始
String app_id = (String)packageParams.get("appid");
String mch_id = (String)packageParams.get("mch_id");
String openid = (String)packageParams.get("openid");
String is_subscribe = (String)packageParams.get("is_subscribe");//是否關(guān)注公眾號(hào)
//附加參數(shù)【商標(biāo)申請(qǐng)_0bda32824db44d6f9611f1047829fa3b_15460】--【業(yè)務(wù)類型_會(huì)員ID_訂單號(hào)】
String attach = (String)packageParams.get("attach");
//商戶訂單號(hào)
String out_trade_no = (String)packageParams.get("out_trade_no");
//付款金額【以分為單位】
String total_fee = (String)packageParams.get("total_fee");
//微信生成的交易訂單號(hào)
String transaction_id = (String)packageParams.get("transaction_id");//微信支付訂單號(hào)
//支付完成時(shí)間
String time_end=(String)packageParams.get("time_end");
lg.info("app_id:"+app_id);
lg.info("mch_id:"+mch_id);
lg.info("openid:"+openid);
lg.info("is_subscribe:"+is_subscribe);
lg.info("out_trade_no:"+out_trade_no);
lg.info("total_fee:"+total_fee);
lg.info("額外參數(shù)_attach:"+attach);
lg.info("time_end:"+time_end);
//執(zhí)行自己的業(yè)務(wù)邏輯結(jié)束
lg.info("支付成功");
//通知微信.異步確認(rèn)成功.必寫.不然會(huì)一直通知后臺(tái).八次之后就認(rèn)為交易失敗了.
resXml = "<xml>" + "<return_code><![CDATA[SUCCESS]]></return_code>"
+ "<return_msg><![CDATA[OK]]></return_msg>" + "</xml> ";
} else {
lg.info("支付失敗,錯(cuò)誤信息：" + packageParams.get("err_code"));
resXml = "<xml>" + "<return_code><![CDATA[FAIL]]></return_code>"
+ "<return_msg><![CDATA[報(bào)文為空]]></return_msg>" + "</xml> ";
}
//------------------------------
//處理業(yè)務(wù)完畢
//------------------------------
BufferedOutputStream out = new BufferedOutputStream(
response.getOutputStream());
out.write(resXml.getBytes());
out.flush();
out.close();
} else{
lg.info("通知簽名驗(yàn)證失敗");
}
}
//微信支付接口
@RequestMapping("/wxPay")
public String wxPay(WeChatParams ps) throws Exception {
ps.setBody("測(cè)試商品3");
ps.setTotal_fee("1");
ps.setOut_trade_no("5409550792199999");
ps.setAttach("xiner");
ps.setMemberid("888");
String urlCode = WeixinPay.getCodeUrl(ps);
System.out.println(urlCode);
return "";
}
