轉自解放號社區：http://bbs.jointforce.com/topic/25765
第一步
進入小程序，下單，請求下單支付，調用小程序登錄API來獲取Openid（https://mp.weixin.QQ.com/debug/w ... .html#wxloginobject）,生成商戶訂單，這些都是在小程序端完成的業務。小程序端代碼// pages/pay/pay.jsvar app = getApp();Page({ data: {}, onLoad: function (options) { // 頁面初始化 options為頁面跳轉所帶來的參數 }, /* 微信支付 */ wxpay: function () { var that = this //登陸獲取code wx.login({ success: function (res) { console.log(res.code) //獲取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 } }) }, /**生成商戶訂單 */ generateOrder: function (openid) { var that = this //統一支付 wx.request({ url: 'http://localhost:8070/RMS/pay_pay.action', method: 'GET', data: { total_fee: '5', body: '支付測試', attach:'真假酒水' }, success: function (res) { console.log(res) var pay = res.data //發起支付 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(默認為1) 頁面 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("支付失敗") console.log(res) }, complete: function () { // complete console.log("pay complete") } }) }})復制代碼第二步調用支付統一下單API來獲取PRepay_id，并將小程序調起支付數據需要簽名的字段appId，timeStamp，nonceStr，package再次簽名（https://pay.weixin.qq.com/wiki/d ... ter=7_7&index=3）后臺代碼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 創建時間：2017年1月21日 下午4:59:03 * 小程序端請求的后臺action，返回簽名后的數據傳到前臺*/public class PayAction { private String total_fee;//總金額 private String body;//商品描述 private String detail;//商品詳情 private String attach;//附加數據 private String time_start;//交易起始時間 private String time_expire;//交易結束時間 private String openid;//用戶標識 private JSONArray jsonArray=new JSONArray(); public String pay() throws UnsupportedEncodingException, DocumentException{ body = new String(body.getBytes("UTF-8"),"ISO-8859-1"); String appid = "替換為自己的小程序ID";//小程序ID String mch_id = "替換為自己的商戶號";//商戶號 String nonce_str = UUIDHexGenerator.generate();//隨機字符串 String today = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date()); String code = PayUtil.createCode(8); String out_trade_no = mch_id+today+code;//商戶訂單號 String spbill_create_ip = "替換為自己的終端IP";//終端IP String notify_url = "http://www.weixin.qq.com/wxpay/pay.php";//通知地址 String trade_type = "JSAPI";//交易類型 String openid="替換為用戶的openid";//用戶標識 /**/ 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編碼放入paymentPo，微信支付要求字符編碼統一采用UTF-8字符編碼 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); // 把請求參數打包成數組 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()); // 除去數組中的空值和簽名參數 Map sPara = PayUtil.paraFilter(sParaTemp); String prestr = PayUtil.createLinkString(sPara); // 把數組所有元素，按照“參數=參數值”的模式用“&”字符拼接成字符串 String key = "&key=替換為商戶支付密鑰"; // 商戶支付密鑰 //MD5運算生成簽名 String mysign = PayUtil.sign(prestr, key, "utf-8").toUpperCase(); paymentPo.setSign(mysign); //打包要發送的xml String respXml = MessageUtil.messageToXML(paymentPo); // 打印respXml發現，得到的xml中有“__”不對，應該替換成“_” respXml = respXml.replace("__", "_"); String url = "https://api.mch.weixin.qq.com/pay/unifiedorder";//統一下單API接口鏈接 String param = respXml; //String result = SendRequestForUrl.sendRequest(url, param);//發起請求 String result =PayUtil.httpRequest(url, "POST", param); // 將解析結果存儲在HashMap中 Map map = new HashMap(); InputStream in=new ByteArrayInputStream(result.getBytes()); // 讀取輸入流 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節點 @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");//返回狀態碼 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)){ // 業務結果 String prepay_id = map.get("prepay_id");//返回的預付單信息 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; //再次簽名 String paySign=PayUtil.sign(stringSignTemp, "&key=替換為自己的密鑰", "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; }}復制代碼后臺業務邏輯涉及到的工具類及參數封裝類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(); // 通過IO獲得Document SAXReader reader = new SAXReader(); Document doc = reader.read(request.getInputStream()); //得到xml的根節點 Element root=doc.getRootElement(); recursiveParseXML(root,map); return map; } private static void recursiveParseXML(Element root,HashMap map){ //得到根節點的子節點列表 List elementList=root.elements(); //判斷有沒有子元素列表 if(elementList.size()==0){ map.put(root.getName(), root.getTextTrim()); } else{ //遍歷 for(Element e:elementList){ recursiveParseXML(e,map); } } } private static XStream xstream = new XStream(new XppDriver() { public HierarchicalStreamWriter createWriter(Writer out) { return new PrettyPrintWriter(out) { // 對所有xml節點都增加CDATA標記 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//封裝支付參數實體package cn.it.shop.util;/** * @author * @version 創建時間：2017年1月21日 下午4:20:52 * 類說明 */public class PaymentPo { private String appid;//小程序ID private String mch_id;//商戶號 private String device_info;//設備號 private String nonce_str;//隨機字符串 private String sign;//簽名 private String body;//商品描述 private String detail;//商品詳情 private String attach;//附加數據 private String out_trade_no;//商戶訂單號 private String fee_type;//貨幣類型 private String spbill_create_ip;//終端IP private String time_start;//交易起始時間 private String time_expire;//交易結束時間 private String goods_tag;//商品標記 private String total_fee;//總金額 private String notify_url;//通知地址 private String trade_type;//交易類型 private String limit_pay;//指定支付方式 private String openid;//用戶標識 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; }}PayUtilpackage 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 創建時間：2017年1月17日 下午7:46:29 類說明*/public class PayUtil { /** * 簽名字符串 * @param text需要簽名的字符串 * @param key 密鑰 * @param input_charset編碼格式 * [url=home.php?mod=space&uid=6711]@return[/url] 簽名結果 */ public static String sign(String text, String key, String input_charset) { text = text + key; return DigestUtils.md5Hex(getContentBytes(text, input_charset)); } /** * 簽名字符串 * @param text需要簽名的字符串 * @param sign 簽名結果 * @param key密鑰 * @param input_charset 編碼格式 * @return 簽名結果 */ 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簽名過程中出現錯誤,指定的編碼集不對,您目前指定的編碼集是:" + charset); } } /** * 生成6位或10位隨機數 param codeLength(多少位) * @return */ public static String createCode(int codeLength) { String code = ""; for (int i = 0; i < codeLength; i++) { code += (int) (Math.random() * 9); } return code; } private static boolean isValidChar(char ch) { if ((ch >= '0' && ch <= '9') || (ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z')) return true; if ((ch >= 0x4e00 && ch <= 0x7fff) || (ch >= 0x8000 && ch <= 0x952f)) return true;// 簡體中文漢字編碼 return false; } /** * 除去數組中的空值和簽名參數 * @param sArray 簽名參數組 * @return 去掉空值與簽名參數后的新簽名參數組 */ 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; } /** * 把數組所有元素排序，并按照“參數=參數值”的模式用“&”字符拼接成字符串 * @param params 需要排序并參與字符拼接的參數組 * @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.size(); i++) { String key = keys.get(i); String value = params.get(key); if (i == keys.size() - 1) {// 拼接時，不包括最后一個&字符 prestr = prestr + key + "=" + value; } else { prestr = prestr + key + "=" + value + "&"; } } return prestr; } /** * * @param requestUrl請求地址 * @param requestMethod請求方法 * @param outputStr參數 */ public static String httpRequest(String requestUrl,String requestMethod,String outputStr){ // 創建SSLContext StringBuffer buffer=null; try{ URL url = new URL(requestUrl); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod(requestMethod); conn.setDoOutput(true); conn.setDoInput(true); conn.connect(); //往服務器端寫內容 if(null !=outputStr){ OutputStream os=conn.getOutputStream(); os.write(outputStr.getBytes("utf-8")); os.close(); } // 讀取服務器端返回的內容 InputStream is = conn.getInputStream(); InputStreamReader isr = new InputStreamReader(is, "utf-8"); BufferedReader br = new BufferedReader(isr); buffer = new StringBuffer(); String line = null; while ((line = br.readLine()) != null) { buffer.append(line); } }catch(Exception e){ e.printStackTrace(); } return buffer.toString(); } public static String urlEncodeUTF8(String source){ String result=source; try { result=java.net.URLEncoder.encode(source, "UTF-8"); } catch (UnsupportedEncodingException e) { // TODO Auto-generated catch block e.printStackTrace(); } return result; }}UUIDHexGeneratorpackage cn.it.shop.util;import java.net.InetAddress;/*** @author * @version 創建時間：2017年1月17日 下午7:45:06 類說明*/public class UUIDHexGenerator { private static String sep = ""; private static final int IP; private static short counter = (short) 0; private static final int JVM = (int) (System.currentTimeMillis() >>> 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; i++) { result = (result << 8) - Byte.MIN_VALUE + (int) bytes; } return result; } protected static String format(int intval) { String formatted = Integer.toHexString(intval); StringBuffer buf = new StringBuffer("00000000"); buf.replace(8 - formatted.length(), 8, formatted); return buf.toString(); } protected static String format(short shortval) { String formatted = Integer.toHexString(shortval); StringBuffer buf = new StringBuffer("0000"); buf.replace(4 - formatted.length(), 4, formatted); return buf.toString(); } protected static int getJVM() { return JVM; } protected synchronized static short getCount() { if (counter < 0) { counter = 0; } return counter++; } protected static int getIP() { return IP; } protected static short getHiTime() { return (short) (System.currentTimeMillis() >>> 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); }}復制代碼新聞熱點
疑難解答
