文章目录
一、前文二、流程图三、SpringBoot接口实现2.1 微信调起支付所需数据2.2 下单接口2.3 支付回调接口三、微信小程序实现3.1 JSAP统一下单3.2 小程序调起支付3.3 支付回调一、前文
V2版本的API，通过MD5加密（本博文主要简述）V3版本的API，使用RAS加密参考
基于WxJava实现微信支付SpringBoot后端接口的使用
微信支付—开发者文档—小程序—小程序调起支付API（V3版本）
微信支付—开发文档—小程序支付—小程序调起支付API（V2）
微信支付接口签名校验工具
微信官方文档—小程序—支付 /wx.requestPayment（V3）
二、流程图
三、SpringBoot接口实现
2.1 微信调起支付所需数据
Md5Utils
/*** Md5加密方法** @author weijian*/public class Md5Utils{private static final Logger log = LoggerFactory.getLogger(Md5Utils.class);/*** 生成 MD5** @param data 待处理数据* @return MD5结果*/public static String MD5(String data) {try {java.security.MessageDigest md = MessageDigest.getInstance("MD5");byte[] array = md.digest(data.getBytes("UTF-8"));StringBuilder sb = new StringBuilder();for (byte item : array) {sb.append(Integer.toHexString((item & 0xFF) | 0x100).substring(1, 3));}return sb.toString().toUpperCase();}catch (Exception e){e.printStackTrace();}return null;}}
WxPayment
/*** 微信调起支付数据 WxPayment** @author weijian*/@ApiModel(value="WxPayment",description="微信调起支付数据")public class WxPayment{@ApiModelProperty(value="wxTradeId", required = true)@Excel(name = "wxTradeId")private Long wxTradeId;@ApiModelProperty(value="小程序id", required = true)@Excel(name = "小程序id")private String appId;@ApiModelProperty(value="时间戳", required = true)@Excel(name = "时间戳")private String timeStamp;@ApiModelProperty(value="随机字符串", required = true)@Excel(name = "随机字符串")private String nonceStr;@ApiModelProperty(value="订单详情扩展字符串", required = true)@Excel(name = "订单详情扩展字符串")private String _package;@ApiModelProperty(value="签名方式", required = true)@Excel(name = "签名方式")private String signType;@ApiModelProperty(value="签名", required = true)@Excel(name = "签名")private String paySign;public void sign(String key){String sign = ("appId="+appId+"&");sign += ("nonceStr="+nonceStr+"&");sign += ("package="+_package+"&");sign += ("signType="+signType+"&");sign += ("timeStamp="+timeStamp+"&");sign += ("key="+key);System.out.println("sign="+sign);setPaySign(Md5Utils.MD5(sign).toUpperCase());}public Long getWxTradeId() {return wxTradeId;}public void setWxTradeId(Long wxTradeId) {this.wxTradeId = wxTradeId;}public String getAppId() {return appId;}public void setAppId(String appId) {this.appId = appId;}public String getTimeStamp() {return timeStamp;}public void setTimeStamp(String timeStamp) {this.timeStamp = timeStamp;}public String getNonceStr() {return nonceStr;}public void setNonceStr(String nonceStr) {this.nonceStr = nonceStr;}public String get_package() {return _package;}public void set_package(String _package) {this._package = _package;}public String getSignType() {return signType;}public void setSignType(String signType) {this.signType = signType;}public String getPaySign() {return paySign;}public void setPaySign(String paySign) {this.paySign = paySign;}@Overridepublic String toString() {return "WxPayment{" +"wxTradeId=" + wxTradeId +", appId='" + appId + '\'' +", timeStamp='" + timeStamp + '\'' +", nonceStr='" + nonceStr + '\'' +", _package='" + _package + '\'' +", signType='" + signType + '\'' +", paySign='" + paySign + '\'' +'}';}}
2.2 下单接口
WxPayController
@ApiOperation("微信统一下单")// @PreAuthorize("@ss.hasPermi('wallet:update')")@Log(title = "微信统一下单", businessType = BusinessType.UPDATE)@PostMapping("/wx/unifiedOrder")public AjaxResult wxUnifiedOrder(@ApiParam() Long billId) throws Exception{Bill bill = billService.selectBillById(billId);if(ObjectUtil.isNull(bill)){return AjaxResult.error("bill异常");}//1. JSAPI微信统一下单WxPayUnifiedOrderRequest wxPayUnifiedOrderRequest = new WxPayUnifiedOrderRequest();wxPayUnifiedOrderRequest.setOutTradeNo(IdUtils.fastSimpleUUID(16));wxPayUnifiedOrderRequest.setTotalFee(1);wxPayUnifiedOrderRequest.setSpbillCreateIp(IpUtils.getHostIp());wxPayUnifiedOrderRequest.setNotifyUrl(":8080/v1/wx/notify");wxPayUnifiedOrderRequest.setTradeType("JSAPI");wxPayUnifiedOrderRequest.setBody("账单支付");wxPayUnifiedOrderRequest.setOpenid(SecurityUtils.getLoginUser().getUser().getTenantOpenId());wxPayUnifiedOrderRequest.setAppid("wx********");WxPayUnifiedOrderResult wxPayUnifiedOrderResult = wxService.unifiedOrder(wxPayUnifiedOrderRequest);//2. 微信订单数据存入数据库WxTrade wxTrade = new WxTrade();wxTrade.setBillId(billId);wxTrade.setUserId(SecurityUtils.getUserId());wxTrade.setUserName(SecurityUtils.getUsername());wxTrade.setAppId(wxPayUnifiedOrderResult.getAppid());wxTrade.setMchId(wxPayUnifiedOrderResult.getMchId());wxTrade.setSubMchId(wxPayUnifiedOrderResult.getSubMchId());wxTrade.setOutTradeNo(wxPayUnifiedOrderRequest.getOutTradeNo());wxTrade.setTotalFee(wxPayUnifiedOrderRequest.getTotalFee());wxTrade.setBody(wxPayUnifiedOrderRequest.getBody());wxTrade.setStatus(Constants.TRADE_UNKNOWN);wxTradeService.insertWxTrade(wxTrade);//3. 生成小程序调起支付所需的数据WxPayment wxPayment = new WxPayment();wxPayment.setWxTradeId(wxTrade.getId());wxPayment.setAppId(wxPayUnifiedOrderResult.getAppid());wxPayment.setTimeStamp((System.currentTimeMillis()/1000)+"");wxPayment.set_package("prepay_id="+wxPayUnifiedOrderResult.getPrepayId());wxPayment.setNonceStr(IdUtils.fastSimpleUUID(32));wxPayment.setSignType("MD5");wxPayment.sign(wxPayProperties.getMchKey());logger.info(wxPayment.toString());//4. 返回wxPaymentreturn AjaxResult.success(wxPayment);}
2.3 支付回调接口
支付回调接口
查询该微信订单是否完成确认支付完成，则执行具体的业务逻辑
/*** 订单状态, -1:未知;0:支付失败;1:支付成功*/public static final int TRADE_UNKNOWN= -1;public static final int TRADE_FAIL = 0;public static final int TRADE_SUCCESS= 1;
public int queryWxOrder(String outTradeNo){try {WxPayOrderQueryResult wxPayOrderQueryResult = wxService.queryOrder(null, outTradeNo);logger.info(wxPayOrderQueryResult.toString());if(wxPayOrderQueryResult.getTradeState().equals("NOTPAY")){return Constants.TRADE_UNKNOWN;}return Constants.TRADE_SUCCESS;}catch (Exception e){// e.printStackTrace();//异常，订单不存在}return Constants.TRADE_FAIL;}
三、微信小程序实现
大部分的加密校验，以及与微信支付接口的交互都在Java后台操作，所以微信小程序的代码就相对简洁简单。
3.1 JSAP统一下单
//统一下单unifiedOrder(){var _this = thisapp.showLoading(true)keyueliSdk.wxUnifiedOrder({billId: _this.data.id,},(res) => {console.log("wxUnifiedOrder", res)_this.requestPayment(res.data.data)},(res) => {})},
3.2 小程序调起支付
//官方标准的支付方法，调起支付界面requestPayment(payData) {var _this = thiswx.requestPayment({timeStamp: payData.timeStamp,nonceStr: payData.nonceStr,package: payData._package,signType: payData.signType,paySign: payData.paySign,success(res) {console.log("支付成功", res)_this.paySuccess(payData)},fail(res) {console.log("支付失败", res)app.showLoading(false)app.showToast("支付失败")}})},
3.3 支付回调
//支付成功记录paySuccess(payData){keyueliSdk.wxPay(payData.wxTradeId,(res) => {wx.hideLoading()console.log("wxPay", res)if(res.data.code==200){app.showToast("支付成功")wx.navigateBack({delta: 1,})return}app.showToast(res.data.msg)},(res) => {})},
觉得好，就一键三连呗（点赞+收藏+关注）
