博客> 微信小程序支付(java后端)
微信小程序支付(java后端)
2018-07-15 14:51 评论:0 阅读:608 JF阿尔法
JAVA 支付 微信小程序

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第一步

进入小程序,下单,请求下单支付,调用小程序登录API来获取Openid(https://mp.weixin.qq.com/debug/w ... .html#wxloginobject),生成商户订单,这些都是在小程序端完成的业务。

小程序端代码 // pages/pay/pay.js var app = getApp(); Page({ data: {}, onLoad: function (options) { // 页面初始化 options为页面跳转所带来的参数 }, / 微信支付 / wxpay: function () { var that = this //登陆获取code wx.login({ success: function (res) { console.log(res.code) //获取openid that.getOpenId(res.code) } }); }, getOpenId: function (code) { var that = this; wx.request({ url: "https://api.weixin.qq.com/sns/jscode2session?appid=wxa142513e524e496c&secret=5d6a7d86048884e7c60f84f7aa85253c&js_code=" + code + "&grant_type=authorization_code", data: {}, method: 'GET', success: function (res) { console.log('返回openId') console.log(res.data) that.generateOrder(res.data.openid) }, fail: function () { // fail }, complete: function () { // complete } }) }, /*生成商户订单 / generateOrder: function (openid) { var that = this //统一支付 wx.request({ url: 'http://localhost:8070/RMS/pay_pay.action', method: 'GET', data: { total_fee: '5', body: '支付测试', attach:'真假酒水' }, success: function (res) { console.log(res) var pay = res.data //发起支付 var timeStamp = pay[0].timeStamp; console.log("timeStamp:"+timeStamp) var packages = pay[0].package; console.log("package:"+packages) var paySign = pay[0].paySign; console.log("paySign:"+paySign) var nonceStr = pay[0].nonceStr; console.log("nonceStr:"+nonceStr) var param = { "timeStamp": timeStamp, "package": packages, "paySign": paySign, "signType": "MD5", "nonceStr": nonceStr }; that.pay(param) }, }) }, / 支付 / pay: function (param) { console.log("支付") console.log(param) wx.requestPayment({ timeStamp: param.timeStamp, nonceStr: param.nonceStr, package: param.package, signType: param.signType, paySign: param.paySign, success: function (res) { // success console.log("支付") console.log(res) wx.navigateBack({ delta: 1, // 回退前 delta(默认为1) 页面 success: function (res) { wx.showToast({ title: '支付成功', icon: 'success', duration: 2000 }) }, fail: function () { // fail }, complete: function () { // complete } }) }, fail: function (res) { // fail console.log("支付失败") console.log(res) }, complete: function () { // complete console.log("pay complete") } }) } }) 复制代码 第二步

调用支付统一下单API来获取prepay_id,并将小程序调起支付数据需要签名的字段appId,timeStamp,nonceStr,package再次签名(https://pay.weixin.qq.com/wiki/d ... ter=7_7&index=3)

后台代码 package cn.it.shop.action; import java.io.ByteArrayInputStream; import java.io.InputStream; import java.io.UnsupportedEncodingException; import java.text.SimpleDateFormat; import java.util.Date; import java.util.HashMap; import java.util.List; import java.util.Map; import org.dom4j.Document; import org.dom4j.DocumentException; import org.dom4j.Element; import org.dom4j.io.SAXReader; import cn.it.shop.util.MessageUtil; import cn.it.shop.util.PayUtil; import cn.it.shop.util.PaymentPo; import cn.it.shop.util.UUIDHexGenerator; import net.sf.json.JSONArray; import net.sf.json.JSONObject; /**

  • @author
  • @version 创建时间:2017年1月21日 下午4:59:03
  • 小程序端请求的后台action,返回签名后的数据传到前台 */ public class PayAction { private String total_fee;//总金额 private String body;//商品描述 private String detail;//商品详情
    private String attach;//附加数据 private String time_start;//交易起始时间 private String time_expire;//交易结束时间 private String openid;//用户标识 private JSONArray jsonArray=new JSONArray(); public String pay() throws UnsupportedEncodingException, DocumentException{ body = new String(body.getBytes("UTF-8"),"ISO-8859-1");
    String appid = "替换为自己的小程序ID";//小程序ID String mch_id = "替换为自己的商户号";//商户号 String nonce_str = UUIDHexGenerator.generate();//随机字符串 String today = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date()); String code = PayUtil.createCode(8); String out_trade_no = mch_id+today+code;//商户订单号 String spbill_create_ip = "替换为自己的终端IP";//终端IP String notify_url = "http://www.weixin.qq.com/wxpay/pay.php";//通知地址 String trade_type = "JSAPI";//交易类型
    String openid="替换为用户的openid";//用户标识 // PaymentPo paymentPo = new PaymentPo(); paymentPo.setAppid(appid); paymentPo.setMch_id(mch_id); paymentPo.setNonce_str(nonce_str); String newbody=new String(body.getBytes("ISO-8859-1"),"UTF-8");//以utf-8编码放入paymentPo,微信支付要求字符编码统一采用UTF-8字符编码 paymentPo.setBody(newbody); paymentPo.setOut_trade_no(out_trade_no); paymentPo.setTotal_fee(total_fee); paymentPo.setSpbill_create_ip(spbill_create_ip); paymentPo.setNotify_url(notify_url); paymentPo.setTrade_type(trade_type); paymentPo.setOpenid(openid); // 把请求参数打包成数组 Map sParaTemp = new HashMap(); sParaTemp.put("appid", paymentPo.getAppid()); sParaTemp.put("mch_id", paymentPo.getMch_id()); sParaTemp.put("nonce_str", paymentPo.getNonce_str()); sParaTemp.put("body", paymentPo.getBody()); sParaTemp.put("out_trade_no", paymentPo.getOut_trade_no()); sParaTemp.put("total_fee",paymentPo.getTotal_fee()); sParaTemp.put("spbill_create_ip", paymentPo.getSpbill_create_ip()); sParaTemp.put("notify_url",paymentPo.getNotify_url()); sParaTemp.put("trade_type", paymentPo.getTrade_type()); sParaTemp.put("openid", paymentPo.getOpenid()); // 除去数组中的空值和签名参数 Map sPara = PayUtil.paraFilter(sParaTemp); String prestr = PayUtil.createLinkString(sPara); // 把数组所有元素,按照“参数=参数值”的模式用“&”字符拼接成字符串 String key = "&key=替换为商户支付密钥"; // 商户支付密钥 //MD5运算生成签名 String mysign = PayUtil.sign(prestr, key, "utf-8").toUpperCase(); paymentPo.setSign(mysign); //打包要发送的xml String respXml = MessageUtil.messageToXML(paymentPo); // 打印respXml发现,得到的xml中有“_”不对,应该替换成“” respXml = respXml.replace("_", ""); String url = "https://api.mch.weixin.qq.com/pay/unifiedorder";//统一下单API接口链接 String param = respXml; //String result = SendRequestForUrl.sendRequest(url, param);//发起请求 String result =PayUtil.httpRequest(url, "POST", param); // 将解析结果存储在HashMap中 Map map = new HashMap(); InputStream in=new ByteArrayInputStream(result.getBytes());
    // 读取输入流 SAXReader reader = new SAXReader(); Document document = reader.read(in); // 得到xml根元素 Element root = document.getRootElement(); // 得到根元素的所有子节点 @SuppressWarnings("unchecked") List elementList = root.elements(); for (Element element : elementList) { map.put(element.getName(), element.getText()); } // 返回信息 String return_code = map.get("return_code");//返回状态码 String return_msg = map.get("return_msg");//返回信息 System.out.println("return_msg"+return_msg); JSONObject JsonObject=new JSONObject() ; if(return_code=="SUCCESS"||return_code.equals(return_code)){ // 业务结果 String prepay_id = map.get("prepay_id");//返回的预付单信息 String nonceStr=UUIDHexGenerator.generate(); JsonObject.put("nonceStr", nonceStr); JsonObject.put("package", "prepay_id="+prepay_id); Long timeStamp= System.currentTimeMillis()/1000; JsonObject.put("timeStamp", timeStamp+""); String stringSignTemp = "appId="+appid+"&nonceStr=" + nonceStr + "&package=prepay_id=" + prepay_id+ "&signType=MD5&timeStamp=" + timeStamp; //再次签名 String paySign=PayUtil.sign(stringSignTemp, "&key=替换为自己的密钥", "utf-8").toUpperCase(); JsonObject.put("paySign", paySign); jsonArray.add(JsonObject); } return "pay"; } 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 JSONArray getJsonArray() { return jsonArray; } public void setJsonArray(JSONArray jsonArray) { this.jsonArray = jsonArray; } public String getDetail() { return detail; } public void setDetail(String detail) { this.detail = detail; } public String getAttach() { return attach; } public void setAttach(String attach) { this.attach = attach; } public String getTime_start() { return time_start; } public void setTime_start(String time_start) { this.time_start = time_start; } public String getTime_expire() { return time_expire; } public void setTime_expire(String time_expire) { this.time_expire = time_expire; } public String getOpenid() { return openid; } public void setOpenid(String openid) { this.openid = openid; } } 复制代码 后台业务逻辑涉及到的工具类及参数封装类 MessageUtil package cn.it.shop.util; import java.io.IOException; import java.io.Writer; import java.util.HashMap; import java.util.List; import javax.servlet.http.HttpServletRequest; import org.dom4j.Document; import org.dom4j.Element; import org.dom4j.io.SAXReader; import com.thoughtworks.xstream.XStream; import com.thoughtworks.xstream.core.util.QuickWriter; import com.thoughtworks.xstream.io.HierarchicalStreamWriter; import com.thoughtworks.xstream.io.xml.PrettyPrintWriter; import com.thoughtworks.xstream.io.xml.XppDriver; public class MessageUtil { public static HashMap parseXML(HttpServletRequest request) throws Exception, IOException{ HashMap map=new HashMap(); // 通过IO获得Document SAXReader reader = new SAXReader(); Document doc = reader.read(request.getInputStream()); //得到xml的根节点 Element root=doc.getRootElement(); recursiveParseXML(root,map); return map; } private static void recursiveParseXML(Element root,HashMap map){ //得到根节点的子节点列表 List elementList=root.elements(); //判断有没有子元素列表 if(elementList.size()==0){ map.put(root.getName(), root.getTextTrim()); } else{ //遍历 for(Element e:elementList){ recursiveParseXML(e,map); } } } private static XStream xstream = new XStream(new XppDriver() { public HierarchicalStreamWriter createWriter(Writer out) { return new PrettyPrintWriter(out) { // 对所有xml节点都增加CDATA标记 boolean cdata = true; public void startNode(String name, Class clazz) { super.startNode(name, clazz); } protected void writeText(QuickWriter writer, String text) { if (cdata) { writer.write(" writer.write(text); writer.write("]]>"); } else { writer.write(text); } } }; } }); public static String messageToXML(PaymentPo paymentPo){ xstream.alias("xml",PaymentPo.class); return xstream.toXML(paymentPo); } } PaymentPo//封装支付参数实体 package cn.it.shop.util; /
  • @author
  • @version 创建时间:2017年1月21日 下午4:20:52
  • 类说明 */ public class PaymentPo { private String appid;//小程序ID private String mch_id;//商户号 private String device_info;//设备号 private String nonce_str;//随机字符串 private String sign;//签名 private String body;//商品描述
    private String detail;//商品详情
    private String attach;//附加数据 private String out_trade_no;//商户订单号 private String fee_type;//货币类型 private String spbill_create_ip;//终端IP private String time_start;//交易起始时间 private String time_expire;//交易结束时间 private String goods_tag;//商品标记 private String total_fee;//总金额 private String notify_url;//通知地址
    private String trade_type;//交易类型
    private String limit_pay;//指定支付方式 private String openid;//用户标识 public String getAppid() { return appid; } public void setAppid(String appid) { this.appid = appid; } public String getMch_id() { return mch_id; } public void setMch_id(String mch_id) { this.mch_id = mch_id; } public String getNonce_str() { return nonce_str; } public void setNonce_str(String nonce_str) { this.nonce_str = nonce_str; } public String getSign() { return sign; } public void setSign(String sign) { this.sign = sign; } 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 getTotal_fee() { return total_fee; } public void setTotal_fee(String total_fee) { this.total_fee = total_fee; } public String getNotify_url() { return notify_url; } public void setNotify_url(String notify_url) { this.notify_url = notify_url; } public String getTrade_type() { return trade_type; } public void setTrade_type(String trade_type) { this.trade_type = trade_type; } public String getOpenid() { return openid; } public void setOpenid(String openid) { this.openid = openid; } public String getSpbill_create_ip() { return spbill_create_ip; } public void setSpbill_create_ip(String spbill_create_ip) { this.spbill_create_ip = spbill_create_ip; } public String getDevice_info() { return device_info; } public void setDevice_info(String device_info) { this.device_info = device_info; } public String getDetail() { return detail; } public void setDetail(String detail) { this.detail = detail; } public String getAttach() { return attach; } public void setAttach(String attach) { this.attach = attach; } public String getFee_type() { return fee_type; } public void setFee_type(String fee_type) { this.fee_type = fee_type; } public String getTime_start() { return time_start; } public void setTime_start(String time_start) { this.time_start = time_start; } public String getTime_expire() { return time_expire; } public void setTime_expire(String time_expire) { this.time_expire = time_expire; } public String getGoods_tag() { return goods_tag; } public void setGoods_tag(String goods_tag) { this.goods_tag = goods_tag; } public String getLimit_pay() { return limit_pay; } public void setLimit_pay(String limit_pay) { this.limit_pay = limit_pay; } } PayUtil package cn.it.shop.util; import java.io.BufferedReader; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStream; import java.io.UnsupportedEncodingException; import java.net.HttpURLConnection; import java.net.URL; import java.util.ArrayList; import java.util.Collections; import java.util.HashMap; import java.util.List; import java.util.Map; import org.apache.commons.codec.digest.DigestUtils; /**
  • @author
  • @version 创建时间:2017年1月17日 下午7:46:29 类说明 */ public class PayUtil { /**
    • 签名字符串
    • @param text需要签名的字符串
    • @param key 密钥
    • @param input_charset编码格式
    • [url=home.php?mod=space&uid=6711]@return[/url] 签名结果 */ public static String sign(String text, String key, String input_charset) { text = text + key; return DigestUtils.md5Hex(getContentBytes(text, input_charset)); } /**
    • 签名字符串
    • @param text需要签名的字符串
    • @param sign 签名结果
    • @param key密钥
    • @param input_charset 编码格式
    • @return 签名结果 */ public static boolean verify(String text, String sign, String key, String input_charset) { text = text + key; String mysign = DigestUtils.md5Hex(getContentBytes(text, input_charset)); if (mysign.equals(sign)) { return true; } else { return false; } } /**
    • @param content
    • @param charset
    • @return
    • @throws SignatureException
    • @throws UnsupportedEncodingException */ public static byte[] getContentBytes(String content, String charset) { if (charset == null || "".equals(charset)) { return content.getBytes(); } try { return content.getBytes(charset); } catch (UnsupportedEncodingException e) { throw new RuntimeException("MD5签名过程中出现错误,指定的编码集不对,您目前指定的编码集是:" + charset); } } /**
    • 生成6位或10位随机数 param codeLength(多少位)
    • @return */ public static String createCode(int codeLength) { String code = ""; for (int i = 0; i < codeLength xss=removed>= '0' && ch <= '9') || (ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z')) return true; if ((ch >= 0x4e00 && ch <= 0x7fff) || (ch >= 0x8000 && ch <= 0x952f)) return true;// 简体中文汉字编码 return false; } /**
    • 除去数组中的空值和签名参数
    • @param sArray 签名参数组
    • @return 去掉空值与签名参数后的新签名参数组 */ public static Map paraFilter(Map sArray) { Map result = new HashMap(); if (sArray == null || sArray.size() <= 0) { return result; } for (String key : sArray.keySet()) { String value = sArray.get(key); if (value == null || value.equals("") || key.equalsIgnoreCase("sign") || key.equalsIgnoreCase("sign_type")) { continue; } result.put(key, value); } return result; } /**
    • 把数组所有元素排序,并按照“参数=参数值”的模式用“&”字符拼接成字符串
    • @param params 需要排序并参与字符拼接的参数组
    • @return 拼接后字符串 */ public static String createLinkString(Map params) { List keys = new ArrayList(params.keySet()); Collections.sort(keys); String prestr = ""; for (int i = 0; i < keys xss=removed xss=removed xss=removed xss=removed xss=removed buffer=null; xss=removed xss=removed os=conn.getOutputStream(); xss=removed xss=removed xss=removed xss=removed xss=removed xss=removed xss=removed result=source; result=java.net.URLEncoder.encode(source, sep = "" xss=removed xss=removed>>> 8); private static UUIDHexGenerator uuidgen = new UUIDHexGenerator(); static { int ipadd; try { ipadd = toInt(InetAddress.getLocalHost().getAddress()); } catch (Exception e) { ipadd = 0; } IP = ipadd; } public static UUIDHexGenerator getInstance() { return uuidgen; } public static int toInt(byte[] bytes) { int result = 0; for (int i = 0; i < 4 xss=removed xss=removed xss=removed xss=removed xss=removed xss=removed>>> 32); } protected static int getLoTime() { return (int) System.currentTimeMillis(); } public static String generate() { return new StringBuffer(36).append(format(getIP())).append(sep).append(format(getJVM())).append(sep) .append(format(getHiTime())).append(sep).append(format(getLoTime())).append(sep) .append(format(getCount())).toString(); } /**
    • @param args / public static void main(String[] args) { String id=""; UUIDHexGenerator uuid = UUIDHexGenerator.getInstance(); / for (int i = 0; i < 100; i++) { id = uuid.generate(); }*/ id = uuid.generate(); System.out.println(id); } } 复制代码 转自解放号社区:http://bbs.jointforce.com/topic/25765
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