微信公众号支付代码,Java代码库,德仔网

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【Java】微信公众号支付
作者:zyjason91 / 发布于2015/8/10/ 615
微信公众号支付的总体其实很简单，大致就分为三步。第一步需要获取用户授权；第二步调用统一下单接口获取预支付id；第三步H5调起微信支付的内置的js。

	第一步需要获取用户授权

	//获取openId
	 HttpClientUtil util = HttpClientUtil.getInstance();
	 Map<String, String> map = new HashMap<String, String>();
	 map.put("appid", WxPayConfig.APPID);
	 map.put("secret", WxPayConfig.APPSECRET);
	 map.put("code", code);
	 map.put("grant_type", WxPayConfig.GRANT_TYPE);
	 String returnStr = util.doPostRetString("https://api.weixin.qq.com/sns/oauth2/access_token", null,map);
	 logger.info("returnStr:[" + returnStr + "]");
	 AccessToken at = JSON.parseObject(returnStr, AccessToken.class);
	
	AccessToken.java
	public class AccessToken {
	
	 private String access_token;
	 private String expires_in;
	 private String refresh_token;
	 private String openid;
	 private String scope;
	 private String unionid;
	
	 public String getAccess_token() {
	 return access_token;
	 }
	 public void setAccess_token(String access_token) {
	 this.access_token = access_token;
	 }
	 public String getExpires_in() {
	 return expires_in;
	 }
	 public void setExpires_in(String expires_in) {
	 this.expires_in = expires_in;
	 }
	 public String getRefresh_token() {
	 return refresh_token;
	 }
	 public void setRefresh_token(String refresh_token) {
	 this.refresh_token = refresh_token;
	 }
	 public String getOpenid() {
	 return openid;
	 }
	 public void setOpenid(String openid) {
	 this.openid = openid;
	 }
	 public String getScope() {
	 return scope;
	 }
	 public void setScope(String scope) {
	 this.scope = scope;
	 }
	 public String getUnionid() {
	 return unionid;
	 }
	 public void setUnionid(String unionid) {
	 this.unionid = unionid;
	 }
	 @Override
	 public String toString() {
	 return "AccessToken [access_token=" + access_token + ", expires_in="
	 + expires_in + ", refresh_token=" + refresh_token + ", openid="
	 + openid + ", scope=" + scope + ", unionid=" + unionid + "]";
	 }
	
	
	
	}

	

	

	第二步调用统一下单接口获取预支付id

	//统一下单
	
	 WxPaySendData data = new WxPaySendData();
	 data.setAppid(WxPayConfig.APPID);
	 data.setAttach("微信支付");
	 data.setBody("微信公众号支付");
	 data.setMch_id(WxPayConfig.MCHID);
	 data.setNonce_str(nonceStr);
	 data.setNotify_url(WxPayConfig.NOTIFY_URL);
	 data.setOut_trade_no(tradeNo);
	 data.setTotal_fee((int)(fee*100));//单位：分
	 data.setTrade_type("JSAPI");
	 data.setSpbill_create_ip(ip);
	 data.setOpenid(at.getOpenid());
	 String returnXml = UnifiedorderService.unifiedOrder(data,WxPayConfig.KEY);
	 WxPayReturnData reData = new WxPayReturnData();
	 XStream xs1 = new XStream(new DomDriver());
	 xs1.alias("xml", WxPayReturnData.class);
	 reData = (WxPayReturnData) xs1.fromXML(returnXml);
	
	UnifiedorderService.java
	public class UnifiedorderService {
	
	 private final static Logger logger = LoggerFactory.getLogger(UnifiedorderService.class);
	
	 public static String unifiedOrder(WxPaySendData data,String key){
	 //统一下单支付
	 String returnXml = null;
	 try {
	 //生成sign签名
	 SortedMap<Object,Object> parameters = new TreeMap<Object,Object>();
	 parameters.put("appid", data.getAppid());
	 parameters.put("attach", data.getAttach());
	 parameters.put("body", data.getBody());
	 parameters.put("mch_id", data.getMch_id());
	 parameters.put("nonce_str", data.getNonce_str());
	 parameters.put("notify_url", data.getNotify_url());
	 parameters.put("out_trade_no", data.getOut_trade_no());
	 parameters.put("total_fee", data.getTotal_fee());
	 parameters.put("trade_type", data.getTrade_type());
	 parameters.put("spbill_create_ip", data.getSpbill_create_ip());
	 parameters.put("openid", data.getOpenid());
	 parameters.put("device_info", data.getDevice_info());
	 logger.info("SIGN:"+WxSign.createSign(parameters,key));
	 data.setSign(WxSign.createSign(parameters,key));
	 XStream xs = new XStream(new DomDriver("UTF-8",new XmlFriendlyNameCoder("-_", "_")));
	 xs.alias("xml", WxPaySendData.class);
	 String xml = xs.toXML(data);
	 logger.info("统一下单xml为:\n" + xml);
	 HttpClientUtil util = HttpClientUtil.getInstance();
	 returnXml = util.doPostForString("https://api.mch.weixin.qq.com/pay/unifiedorder", null, xml);
	 logger.info("返回结果:" + returnXml);
	 } catch (Exception e) {
	 e.printStackTrace();
	 }
	 return returnXml;
	 }
	
	}
	
	WxSign
	public class WxSign {
	
	
	 private static String characterEncoding = "UTF-8";
	
	 @SuppressWarnings("rawtypes")
	 public static String createSign(SortedMap<Object,Object> parameters,String key){
	 StringBuffer sb = new StringBuffer();
	 Set es = parameters.entrySet();//所有参与传参的参数按照accsii排序（升序）
	 Iterator it = es.iterator();
	 while(it.hasNext()) {
	 Map.Entry entry = (Map.Entry)it.next();
	 String k = (String)entry.getKey();
	 Object v = entry.getValue();
	 if(null != v && !"".equals(v)
	 && !"sign".equals(k) && !"key".equals(k)) {
	 sb.append(k + "=" + v + "&");
	 }
	 }
	 sb.append("key=" + key);
	 String sign = MD5Util.MD5Encode(sb.toString(), characterEncoding).toUpperCase();
	 return sign;
	 }
	
	 public static String getNonceStr() {
	 Random random = new Random();
	 return MD5Util.MD5Encode(String.valueOf(random.nextInt(10000)), "UTF-8");
	 }
	
	 public static String getTimeStamp() {
	 return String.valueOf(System.currentTimeMillis() / 1000);
	 }
	
	}

	

	第三步H5调起微信支付的内置的js

	//H5调起支付
	 attr.addAttribute("appId", reData.getAppid());
	 attr.addAttribute("timeStamp", WxSign.getTimeStamp());
	 attr.addAttribute("nonceStr", reData.getNonce_str());
	 attr.addAttribute("package", "prepay_id="+reData.getPrepay_id());
	 attr.addAttribute("signType", "MD5");
	 SortedMap<Object,Object> signMap = new TreeMap<Object,Object>();
	 signMap.put("appId", reData.getAppid());
	 signMap.put("timeStamp", WxSign.getTimeStamp());
	 signMap.put("nonceStr", reData.getNonce_str());
	 signMap.put("package", "prepay_id="+reData.getPrepay_id());
	 signMap.put("signType", "MD5");
	 logger.info("PaySIGN:"+WxSign.createSign(signMap,WxPayConfig.KEY));
	 attr.addAttribute("paySign", WxSign.createSign(signMap,WxPayConfig.KEY));
	
	
	<script>
	 function getUrlParam(name) {
	 //构造一个含有目标参数的正则表达式对象
	 var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
	 //匹配目标参数
	 var r = window.location.search.substr(1).match(reg);
	 //返回参数值
	 if (r != null)
	 return unescape(r[2]);
	 return null;
	 }
	
	 function onBridgeReady() {
	 var appId = getUrlParam('appId');
	 var timeStamp = getUrlParam('timeStamp');
	 var nonceStr = getUrlParam('nonceStr');
	 var Package = getUrlParam('package');
	 var signType = getUrlParam('signType');
	 var paySign = getUrlParam('paySign');
	 WeixinJSBridge.invoke('getBrandWCPayRequest', {
	 "appId" : appId,//"wx2421b1c4370ec43b", //公众号名称，由商户传入
	 "timeStamp" : timeStamp,//"1395712654", //时间戳，自1970年以来的秒数
	 "nonceStr" : nonceStr,//"e61463f8efa94090b1f366cccfbbb444", //随机串
	 "package" : Package,//"prepay_id=u802345jgfjsdfgsdg888",
	 "signType" : signType,//"MD5", //微信签名方式:
	 "paySign" : paySign,//"70EA570631E4BB79628FBCA90534C63FF7FADD89" //微信签名
	 }, function(res) { // 使用以上方式判断前端返回,微信团队郑重提示：res.err_msg将在用户支付成功后返回 ok，但并不保证它绝对可靠。
	 //alert(res.err_msg);
	 if (res.err_msg == "get_brand_wcpay_request:ok") {
	 alert("支付成功");
	 }
	 if (res.err_msg == "get_brand_wcpay_request:cancel") {
	 alert("交易取消");
	 }
	 if (res.err_msg == "get_brand_wcpay_request:fail") {
	 alert("支付失败");
	 }
	 });
	 }
	
	 function callPay() {
	 if (typeof WeixinJSBridge == "undefined") {
	 if (document.addEventListener) {
	 document.addEventListener('WeixinJSBridgeReady', onBridgeReady,
	 false);
	 } else if (document.attachEvent) {
	 document.attachEvent('WeixinJSBridgeReady', onBridgeReady);
	 document.attachEvent('onWeixinJSBridgeReady', onBridgeReady);
	 }
	 } else {
	 onBridgeReady();
	 }
	 }
	</script>
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