最近在做微信支付开发用的框架是 srpingMVC mybatis spring
下面是开发流程图
我们只需要开发红色标记的模块就可以了。
具体参数详情可以查看微信开发者文档。
新手第一次写,写的不好。
1.下面是下单接口
@RequestMapping(value = "/down/order.spr")
@ResponseBody
public Object downOrder(HttpServletRequest request, HttpServletResponse response,
@RequestParam("appointment_id") String appointment_id) {
// 生成随机数字符串
String nonceStr = getRandomString();
// 获取商品订单号
String out_trade_no = UUID.randomUUID().toString().replace("-", "");
// 获取终端 IP
String spbill_create_ip = request.getRemoteAddr();
// 获取微信 openid
WeiXinUserInfo userInfo = (WeiXinUserInfo) request.getSession().getAttribute("weixinUser");
// 组装请求数据
Map<String, String> paramsMap = new HashMap<String, String>();
// 获取签名
String sign = "";
try {
paramsMap.put("openid", userInfo.getOpenid());
paramsMap.put("appid", APP_ID);
paramsMap.put("mch_id", MCH_ID);
paramsMap.put("nonce_str", nonceStr);
paramsMap.put("body", body);
paramsMap.put("out_trade_no", out_trade_no);
paramsMap.put("fee_type", FEE_TYPE);
paramsMap.put("total_fee", total_fee);
paramsMap.put("spbill_create_ip", spbill_create_ip);
paramsMap.put("notify_url", NOTIFY_URL);
paramsMap.put("trade_type", TRADE_TYPE);
sign = getPayCustomSign(paramsMap, paykey);
paramsMap.put("sign", sign);
} catch (Exception e) {
log.debug("生成请求签名失败");
}
// map 转 xml 字符串
String paramsXml = mapToXml(paramsMap);
// 发送订单请求
String result = sendPost(DOWN_ORDER, paramsXml);
// 将返回的 xml 转化成 map
Map<String, String> resultMap = null;
// 获取预支付交易会话标识
String prepay_id = "";
if (result.indexOf("SUCCESS") != -1) {
try {
resultMap = xmlToMap(result);
prepay_id = resultMap.get("prepay_id");
} catch (JDOMException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
// 进行填充数据库
saveOrder(appointment_id);
}
// 封装 h5 页面调用参数
Map<String, Object> returnSignMap = new HashMap<String, Object>();
String returnSign = "";
try {
returnSignMap.put("appid", APP_ID);
returnSignMap.put("timeStamp", System.currentTimeMillis());
returnSignMap.put("nonce_str", nonceStr);
returnSignMap.put("package", "prepay_id=" + prepay_id);
returnSignMap.put("signType", "MD5");
returnSign = getPayCustomSign(returnSignMap, paykey);
returnSignMap.put("sign", returnSign);
} catch (Exception e) {
log.debug("生成返回签名失败");
}
return new ResponseWrapper(ExceptionCode.SUCCESS, null, returnSignMap);
}
比较麻烦是签名的获取：以下是代码（摘自网络）
/**
* 获取支付所需签名
*
* @param bizObj
* @param key
* @return
* @throws Exception
*/
private String getPayCustomSign(Map map, String key) throws Exception {
String bizString = FormatBizQueryParaMap(map, false);
return sign(bizString, key);
}
/**
* 进行字典排序
*
* @param paraMap
* @param urlencode
* @return
* @throws Exception
*/
private String FormatBizQueryParaMap(Map paraMap, boolean urlencode) throws Exception {
String sf = "";
try {
List<Entry> infoIds = new ArrayList<Entry>(paraMap.entrySet());
Collections.sort(infoIds, new Comparator<Entry>() {
public int compare(Map.Entry o1, Map.Entry o2) {
return (o1.getKey().toString().compareTo(o2.getKey().toString()));
}
});
for (int i = 0; i < infoIds.size(); i++) {
Map.Entry entryItem = infoIds.get(i);
if (entryItem.getKey() != "") {
String key = (String) entryItem.getKey();
String value = (String) entryItem.getValue();
if (urlencode) {
value = URLEncoder.encode(value, "utf-8");
}
sf += key + "=" + value + "&";
}
}
if (sf.isEmpty() == false) {
sf = sf.substring(0, sf.length() - 1);
}
} catch (Exception e) {
throw new Exception(e.getMessage());
}
return sf;
}
/**
* 生成 签名
*
* @param content
* @param key
* @return
*/
private String sign(String content, String key) {
String signStr = content + "&key=" + key;
return MD5(signStr).toUpperCase();
}
/**
* MD5 加密
*
* @param str
* @return
*/
private final String MD5(String str) {
char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
try {
byte[] btInput = str.getBytes();
MessageDigest mdInst = MessageDigest.getInstance("MD5");
mdInst.update(btInput);
byte[] md = mdInst.digest();
int j = md.length;
char str2[] = new char[j * 2];
int k = 0;
for (int i = 0; i < j; i++) {
byte byte0 = md[i];
str2[k++] = hexDigits[byte0 >>> 4 & 0xf];
str2[k++] = hexDigits[byte0 & 0xf];
}
return new String(str2);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
生成随机数
/**
* 随机生成 32 位的字符串
*
* @return
*/
private String getRandomString() {
Random random = new Random();
StringBuffer nonceStrSf = new StringBuffer();
for (int i = 0; i < 32; i++) {
nonceStrSf.append(nonce_str.charAt(random.nextInt(nonce_str.length() - 1)));
}
return nonceStrSf.toString();
}
map转xml
/**
* map 转 xml
*
* @param map
* @return
*/
private String mapToXml(Map<String, String> map) {
StringBuffer sf = new StringBuffer("<xml>");
Iterator<Entry<String, String>> iterator = map.entrySet().iterator();
while (iterator.hasNext()) {
Entry<String, String> entry = iterator.next();
String key = entry.getKey();
String value = entry.getValue();
sf.append("<" + key + ">" + value + "</" + key + ">");
}
sf.append("</xml>");
return sf.toString();
}
2.接受微信通知结果接口
/**
* 接受通知
*
* @param request
* @param response
* @return
* @throws IOException
*/
@RequestMapping(value = "/acceptance/notify.spt")
public void acceptanceNotify(HttpServletRequest request, HttpServletResponse response) throws IOException {
// 接受微信返回通知
String content = RequestUtil.getRequestContent(request);
// 设置发送请求参数
Map<String, String> resultMap = new HashMap<String, String>();
try {
resultMap = xmlToMap(content);
} catch (JDOMException e) {
e.printStackTrace();
}
// 进行数据存库,交易成功则存库,否则不存
saveOrderLog(content, resultMap);
Map<String, String> returnMap = new HashMap<String, String>();
returnMap.put("return_code", resultMap.get("return_code"));
returnMap.put("return_msg", resultMap.get("return_msg"));
String toXml = mapToXml(returnMap);
response.getWriter().write(toXml);
}
第一次写这么长的博客，不足之处请留言告之便于本人成长，再次感谢你的阅读。