更新:2015年12月3日微信提供 Wap 支付, 開發者文檔:【微信支付】開發者文檔
1.前言
公司是通過支付寶和微信支付那塊內容獲取收入,app端已經接入成功,現在要做WAP端。需要頁面和後臺接口一起來實現。
2.接口接入
因爲微信支付版本更新了,網上下的demo是V2.5版的,用不了了。所以去網上找資料,看到最新版的V3。
這裏我找到了一個統一下單接口,文檔入口.
他的接口地址爲:https://api.mch.weixin.qq.com/pay/unifiedorder
因此,開始接入我所需要的wap端參數。
這裏需要的參數關鍵有Appid,mch_id,key。
appid和mch_id是在公衆平臺那邊獲取。key值是在商戶平臺(pay.weixin.qq.com)-->賬戶設置-->API安全-->密鑰設置 這邊自己設置的。
坑一:若key值設置不對,會出現錯誤“支付權限查詢失敗” 。這時候請檢查 appid,mch_id所在的公衆號 對應 商戶號的key值是否正確。
坑二:我在開發中還遇到“您沒有WAP支付權限” 這麼個錯誤。百了很久都沒人遇到這個坑。於是,發送郵件給微信支付([email protected], [email protected])這兩個郵件我都發了,結果還是漫無迴應啊。於是,打通了商戶平臺的客服(0755-86018333),客服是MM,估計不懂技術問題,叫我去提問平臺提交問題(http://kf.qq.com//bills/150821samab01c976f2a.html),說是技術人員看到會回覆的,我問是不是 馬上回復,MM不說,就說會回覆的,唉,畢竟人家客服不懂,就沒繼續問下去了。打開客服給的網址,填寫的時候,發現沒有WAP端,也沒有統一下單這說法,那我只好填寫了 網頁(JSAPI)支付 ,下面在詳細說明,提交後,出現了個提示,說是七天內給個迴應。我去,那還不是白忙活,要7天 業務緊急啊。。
3.代碼編寫
(1).獲取統一下單參數
public String CreateWapUrl(String outTradeNo, String ip) throws SDKRuntimeException {
HashMap<String, Object> param = new HashMap<String, Object>();
param.put("appid", WxPayConfig.APPID);
param.put("mch_id", WxPayConfig.MCHID);
param.put("nonce_str", CommonUtil.CreateNoncestr());
param.put("body", "產品測試");
param.put("out_trade_no", outTradeNo);
param.put("total_fee", 1);
param.put("spbill_create_ip", ip);
param.put("notify_url", WxPayConfig.NOTIFYURL);
param.put("trade_type", "WAP");
param.put("sign", getSign(param));
return CommonUtil.MapToXml(param);
}
(2).獲取簽名值
public String getSign(HashMap<String, Object> param) throws SDKRuntimeException {
String sign="";
String content = CommonUtil.FormatParamMap(param);
sign = Sign(content, WxPayConfig.KEY);
return sign;
}
public static String Sign(String content, String key) throws SDKRuntimeException {
String signStr = "";
if ("" == key) {
throw new SDKRuntimeException("財付通簽名key不能爲空!");
}
if ("" == content) {
throw new SDKRuntimeException("財付通簽名內容不能爲空");
}
signStr = content + "&key=" + key;
return MD5Util.MD5(signStr).toUpperCase();
}
(3).工具類方法
public static boolean IsNumeric(String str) {
if (str.matches("\\d *")) {
return true;
} else {
return false;
}
}
//map轉成xml
public static String MapToXml(HashMap<String, Object> arr) {
String xml = "<xml>";
Iterator<Entry<String, Object>> iter = arr.entrySet().iterator();
while (iter.hasNext()) {
Entry<String, Object> entry = iter.next();
String key = entry.getKey();
String val = entry.getValue()+"";
if (IsNumeric(val)) {
xml += "<" + key + ">" + val + "</" + key + ">";
} else
xml += "<" + key + "><![CDATA[" + val + "]]></" + key + ">";
}
xml += "</xml>";
return xml;
}
//xml轉成map
@SuppressWarnings("unchecked")
public static Map<String, String> parseXml(String xml) throws Exception {
Map<String, String> map = new HashMap<String, String>();
Document document = DocumentHelper.parseText(xml);
Element root = document.getRootElement();
List<Element> elementList = root.elements();
for (Element e : elementList) {
map.put(e.getName(), e.getText());
}
return map;
}
public static String FormatParamMap(HashMap<String, Object> parameters) throws SDKRuntimeException {
String buff = "";
try {
List<Map.Entry<String, Object>> infoIds = new ArrayList<Map.Entry<String, Object>>(
parameters.entrySet());
Collections.sort(infoIds,
new Comparator<Map.Entry<String, Object>>() {
public int compare(Map.Entry<String, Object> o1,
Map.Entry<String, Object> o2) {
return (o1.getKey()).toString().compareTo(
o2.getKey());
}
});
for (int i = 0; i < infoIds.size(); i++) {
Map.Entry<String, Object> item = infoIds.get(i);
if (item.getKey() != "") {
buff += item.getKey() + "="
+ URLEncoder.encode(item.getValue()+"", "utf-8") + "&";
}
}
if (buff.isEmpty() == false) {
buff = buff.substring(0, buff.length() - 1);
}
} catch (Exception e) {
throw new SDKRuntimeException(e.getMessage());
}
return buff;
}
public static String CreateNoncestr() {
String chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
String res = "";
for (int i = 0; i < 16; i++) {
Random rd = new Random();
res += chars.charAt(rd.nextInt(chars.length() - 1));
}
return res;
}
(4).發送請求方法
public static String sendPost(String url, String param,String charset) {
PrintWriter out = null;
BufferedReader in = null;
String result = "";
try {
URL realUrl = new URL(url);
// 打開和URL之間的連接
URLConnection conn = realUrl.openConnection();
// 設置通用的請求屬性
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive");
conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 發送POST請求必須設置如下兩行
conn.setDoOutput(true);
conn.setDoInput(true);
// 獲取URLConnection對象對應的輸出流
out = new PrintWriter(conn.getOutputStream());
// 發送請求參數
out.print(new String(param.getBytes(),charset));
// flush輸出流的緩衝
out.flush();
// 定義BufferedReader輸入流來讀取URL的響應
in = new BufferedReader(new InputStreamReader(conn.getInputStream(), charset));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
e.printStackTrace();
}
//使用finally塊來關閉輸出流、輸入流
finally{
try{
if(out!=null){
out.close();
}
if(in!=null){
in.close();
}
}
catch(IOException ex){
ex.printStackTrace();
}
}
return result;
}
(5).執行接口
//網頁版微信支付接口
public String wxWapPay() throws Exception {
String result = SUCCESS;
String message = "";
int code = 0;
try {
String ip = getIpAddr(request);
String outTradeNo = new SimpleDateFormat("YYYYMMDDHHmmssSSS").format(new Date())+"-wap";
String param = new WxPayHelper().CreateWapUrl(outTradeNo, ip);
String resp = HttpRequest.sendPost(WxPayConfig.UNIFIEDORDER_INTERFACE, param, "utf-8");
Map<String, String> res = CommonUtil.parseXml(resp);
if(res.get("return_code") == "SUCCESS") {
if(res.get("result_code") == "SUCCESS") {
message = res.get("code_url");
}else {
code = -1;
message = res.get("err_code_des");
logger.error("wxWapPay error code"+res.get("err_code")+", reason is "+res.get("err_code_des"));
}
}else {
code = -1;
message = res.get("return_msg");
logger.error("wxWapPay error reason is "+res.get("return_msg"));
}
} catch (Exception e) {
code = -1;
logger.error("wxWapPay Exception reason is "+ e);
e.printStackTrace();
}
dataMap = new HashMap<String, Object>();
dataMap.put("code", code);
dataMap.put("message", message);
return result;
}
更多參考
https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=9_1