这里有新鲜出炉的Java并发编程示例,程序狗速度看过来!
java 是一种可以撰写跨平台应用软件的面向对象的程序设计语言,是由Sun Microsystems公司于1995年5月推出的Java程序设计语言和Java平台(即JavaEE(j2ee), JavaME(j2me), JavaSE(j2se))的总称。
微信支付已经成为生活中必不可少的付款方式,本篇文章主要介绍了Java微信支付之公众号支付、扫码支付,有需要的小伙伴可以了解一下。
微信支付现在已经变得越来越流行了,随之也出现了很多以可以快速接入微信支付为噱头的产品,不过方便之余也使得我们做东西慢慢依赖第三方,丧失了独立思考的能力,这次打算分享下我之前开发过的微信支付。
一 、H5公众号支付
要点:正确获取openId以及统一下单接口,正确处理支付结果通知,正确配置支付授权目录
H5的支付方式是使用较为广泛的方式,这种支付方式主要用于微信内自定义菜单的网页,依赖手机上安装的微信客户端,高版本的微信才支持微信支付,下面按我的流程注意说明
1 编写用于支付的页面,由于是测试用就写的简单了点
- <%@ page language="java" import="java.util.*" pageEncoding="UTF-8" %>
- <% String path=r equest.getContextPath(); String basePath=r equest.getScheme()+
- "://"+request.getServerName()+ ":"+request.getServerPort()+path+ "/"; %>
- <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
- <html>
- <head>
- <base href="<%=basePath%>">
- <title>
- 微信支付样例
- </title>
- <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0">
- <!-- <link rel="stylesheet" type="text/css" href="styles.css">
- -->
- </head>
- <body>
- <form action="oauthServlet" method="POST">
- 订单号:
- <input type="text" name="orderNo" />
- <input type="submit" value="H5支付" />
- </form>
- </br>
- </br>
- <form action="scanCodePayServlet?flag=createCode" method="POST">
- 订单号:
- <input type="text" name="orderNo" />
- <input type="submit" value="扫码支付" />
- </form>
- </body>
- </html>
2 编写一个servlet用于通过Oauth获取code
- package com.debug.weixin.servlet;
- import java.io.IOException;
- import java.io.PrintWriter;
- import javax.servlet.RequestDispatcher;
- import javax.servlet.ServletException;
- import javax.servlet.http.HttpServlet;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
- import com.debug.weixin.util.CommonUtil;
- import com.debug.weixin.util.ServerConfig;
- public class OauthServlet extends HttpServlet {
- public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException,
- IOException {
- this.doPost(request, response);
- }
- public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException,
- IOException {
- String orderNo = request.getParameter("orderNo");
- //调用微信Oauth2.0获取openid
- String redirectURL = ServerConfig.SERVERDOMAIN + "/BasicWeixin/payServletForH5?orderNo=" + orderNo;
- String redirectURI = "";
- try {
- redirectURI = CommonUtil.initOpenId(redirectURL);
- } catch(Exception e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- //System.out.println(redirectURI);
- //RequestDispatcher dis= request.getRequestDispatcher(redirectURI);
- //dis.forward(request, response);
- response.sendRedirect(redirectURI);
- }
- }
3 获取到code后,通过REDIRECTURI获取openId,调用统一下单接口
- package com.debug.weixin.servlet;
- import java.io.IOException;
- import java.io.PrintWriter;
- import java.util.SortedMap;
- import java.util.TreeMap;
- import javax.servlet.RequestDispatcher;
- import javax.servlet.ServletException;
- import javax.servlet.http.HttpServlet;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
- import com.debug.weixin.pojo.WeixinOauth2Token;
- import com.debug.weixin.pojo.WeixinQRCode;
- import com.debug.weixin.util.AdvancedUtil;
- import com.debug.weixin.util.CommonUtil;
- import com.debug.weixin.util.ConfigUtil;
- import com.debug.weixin.util.PayCommonUtil;
- public class PayServletForH5 extends HttpServlet {
- public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException,
- IOException {
- this.doPost(request, response);
- }
- public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException,
- IOException {
- String orderNo = request.getParameter("orderNo");
- String code = request.getParameter("code");
- //获取AccessToken
- WeixinOauth2Token token = AdvancedUtil.getOauth2AccessToken(ConfigUtil.APPID, ConfigUtil.APP_SECRECT, code);
- String openId = token.getOpenId();
- //调用微信统一支付接口
- SortedMap < Object,
- Object > parameters = new TreeMap < Object,
- Object > ();
- parameters.put("appid", ConfigUtil.APPID);
- parameters.put("mch_id", ConfigUtil.MCH_ID);
- parameters.put("device_info", "1000");
- parameters.put("body", "我的测试订单");
- parameters.put("nonce_str", PayCommonUtil.CreateNoncestr());
- parameters.put("out_trade_no", orderNo);
- //parameters.put("total_fee", String.valueOf(total));
- parameters.put("total_fee", "1");
- parameters.put("spbill_create_ip", request.getRemoteAddr());
- parameters.put("notify_url", ConfigUtil.NOTIFY_URL);
- parameters.put("trade_type", "JSAPI");
- parameters.put("openid", openId);
- String sign = PayCommonUtil.createSign("UTF-8", parameters);
- parameters.put("sign", sign);
- String requestXML = PayCommonUtil.getRequestXml(parameters);
- String result = CommonUtil.httpsRequestForStr(ConfigUtil.UNIFIED_ORDER_URL, "POST", requestXML);
- System.out.println("----------------------------------");
- System.out.println(result);
- System.out.println("----------------------------------");
- request.setAttribute("orderNo", orderNo);
- request.setAttribute("totalPrice", "0.01");
- String payJSON = "";
- try {
- payJSON = CommonUtil.getH5PayStr(result, request);
- } catch(Exception e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- //System.out.println(payJSON);
- request.setAttribute("unifiedOrder", payJSON);
- RequestDispatcher dis = request.getRequestDispatcher("h5Pay.jsp");
- dis.forward(request, response);
- }
- }
调用微信统一下单接口,需要注意签名算法,只有签名计算正确才能顺利支付
- public static String getH5PayStr(String result, HttpServletRequest request) throws Exception {
- Map < String,
- String > map = XMLUtil.doXMLParse(result);
- SortedMap < Object,
- Object > params = new TreeMap < Object,
- Object > ();
- params.put("appId", ConfigUtil.APPID);
- params.put("timeStamp", Long.toString(new Date().getTime()));
- params.put("nonceStr", PayCommonUtil.CreateNoncestr());
- params.put("package", "prepay_id=" + map.get("prepay_id"));
- params.put("signType", ConfigUtil.SIGN_TYPE);
- String paySign = PayCommonUtil.createSign("UTF-8", params);
- params.put("paySign", paySign); //paySign的生成规则和Sign的生成规则一致
- String json = JSONObject.fromObject(params).toString();
- return json;
- }
4 编写最终的支付界面调起微信H5支付
- <%@ page language="java" import="java.util.*" pageEncoding="UTF-8" %>
- <% String path=r equest.getContextPath(); String basePath=r equest.getScheme()+
- "://"+request.getServerName()+ ":"+request.getServerPort()+path+ "/"; %>
- <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
- <html>
- <head>
- <base href="<%=basePath%>">
- <title>
- 微信H5支付
- </title>
- <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0">
- <script type="text/javascript">
- function jsApiCall() {
- WeixinJSBridge.invoke('getBrandWCPayRequest', <%=(String) request.getAttribute("unifiedOrder") % >,
- function(res) {
- WeixinJSBridge.log(res.err_msg);
- //alert(res.err_code+res.err_desc+res.err_msg);
- if (res.err_msg == "get_brand_wcpay_request:ok") {
- alert("恭喜你,支付成功!");
- } else {
- alert(res.err_code + res.err_desc + res.err_msg);
- }
- });
- }
- function callpay() {
- if (typeof WeixinJSBridge == "undefined") {
- if (document.addEventListener) {
- document.addEventListener('WeixinJSBridgeReady', jsApiCall, false);
- } else if (document.attachEvent) {
- document.attachEvent('WeixinJSBridgeReady', jsApiCall);
- document.attachEvent('onWeixinJSBridgeReady', jsApiCall);
- }
- } else {
- jsApiCall();
- }
- }
- </script>
- </head>
- <body>
- <input type="button" value="支付" onclick="callpay()" />
- </body>
- </html>
5 处理微信支付结果通知
- package com.debug.weixin.servlet;
- import java.io.ByteArrayOutputStream;
- import java.io.IOException;
- import java.io.InputStream;
- import java.io.PrintWriter;
- import java.util.Map;
- import javax.servlet.ServletException;
- import javax.servlet.http.HttpServlet;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
- import org.jdom.JDOMException;
- import com.debug.weixin.util.PayCommonUtil;
- import com.debug.weixin.util.XMLUtil;
- public class PayHandlerServlet extends HttpServlet {
- public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException,
- IOException {
- this.doPost(request, response);
- }
- public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException,
- IOException {
- InputStream inStream = request.getInputStream();
- ByteArrayOutputStream outSteam = new ByteArrayOutputStream();
- byte[] buffer = new byte[1024];
- int len = 0;
- while ((len = inStream.read(buffer)) != -1) {
- outSteam.write(buffer, 0, len);
- }
- outSteam.close();
- inStream.close();
- String result = new String(outSteam.toByteArray(), "utf-8"); //获取微信调用我们notify_url的返回信息
- Map < Object,
- Object > map = null;
- try {
- map = XMLUtil.doXMLParse(result);
- } catch(JDOMException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- for (Object keyValue: map.keySet()) {
- System.out.println(keyValue + "=" + map.get(keyValue));
- }
- if (map.get("result_code").toString().equalsIgnoreCase("SUCCESS")) {
- //对订单进行业务操作
- System.out.println("-------------OK");
- response.getWriter().write(PayCommonUtil.setXML("SUCCESS", "")); //告诉微信服务器,我收到信息了,不要在调用回调action了
- }
- }
- }
对于上面的代码,有很多都是参考http://blog.csdn.net/u011160656/article/details/41759195,因此这部分的代码就不贴出来了,需要的话看这个博客就知道了。
二 微信扫码支付(模式一)
要点:必须调用长链接转短链接接口、正确配置扫码支付回调URL
1 根据订单号生成微信支付二维码
下面是几个生成二维码的方法:
- package com.debug.weixin.util;
- import com.google.zxing.common.BitMatrix;
- import javax.imageio.ImageIO;
- import java.io.File;
- import java.io.OutputStream;
- import java.io.IOException;
- import java.awt.image.BufferedImage;
- public final class MatrixToImageWriter {
- private static final int BLACK = 0xFF000000;
- private static final int WHITE = 0xFFFFFFFF;
- private MatrixToImageWriter() {}
- public static BufferedImage toBufferedImage(BitMatrix matrix) {
- int width = matrix.getWidth();
- int height = matrix.getHeight();
- BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
- for (int x = 0; x < width; x++) {
- for (int y = 0; y < height; y++) {
- image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);
- }
- }
- return image;
- }
- public static void writeToFile(BitMatrix matrix, String format, File file)
- throws IOException {
- BufferedImage image = toBufferedImage(matrix);
- if (!ImageIO.write(image, format, file)) {
- throw new IOException("Could not write an image of format " + format + " to " + file);
- }
- }
- public static void writeToStream(BitMatrix matrix, String format, OutputStream stream)
- throws IOException {
- BufferedImage image = toBufferedImage(matrix);
- if (!ImageIO.write(image, format, stream)) {
- throw new IOException("Could not write an image of format " + format);
- }
- }
- }
这个算是工具类,还有一个就是把二维码显示在界面上的方法,CreateQRCode主要用到代码块:
- public static void createCodeStream(String text,HttpServletResponse response) throws Exception{
- // response.setContentType("image/jpeg");
- ServletOutputStream sos = response.getOutputStream();
- int width = 500;
- int height = 500;
- //二维码的图片格式
- String format = "jpg";
- MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
- Map hints = new HashMap();
- //内容所使用编码
- hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
- BitMatrix bitMatrix = multiFormatWriter.encode(text, BarcodeFormat.QR_CODE, width, height, hints);
- //生成二维码
- MatrixToImageWriter.writeToStream(bitMatrix, format,sos);
- sos.close();
- }
2 长链接转短链接生成二维码,编写扫码支付回调方法并调用统一下单接口
- package com.debug.weixin.servlet;
- import java.io.ByteArrayOutputStream;
- import java.io.IOException;
- import java.io.InputStream;
- import java.io.PrintWriter;
- import java.util.Date;
- import java.util.Map;
- import java.util.SortedMap;
- import java.util.TreeMap;
- import javax.servlet.ServletException;
- import javax.servlet.http.HttpServlet;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
- import org.jdom.JDOMException;
- import com.debug.weixin.util.CommonUtil;
- import com.debug.weixin.util.ConfigUtil;
- import com.debug.weixin.util.CreateQRCode;
- import com.debug.weixin.util.PayCommonUtil;
- import com.debug.weixin.util.XMLUtil;
- import com.mongodb.DBObject;
- public class ScanCodePayServlet extends HttpServlet {
- public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException,
- IOException {
- this.doPost(request, response);
- }
- public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException,
- IOException {
- String flag = request.getParameter("flag");
- if ("createCode".equals(flag)) {
- createPayCode(request, response);
- } else {
- try {
- wxScanCodeHandler(request, response);
- } catch(Exception e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- }
- }
- public void createPayCode(HttpServletRequest request, HttpServletResponse response) {
- String orderNo = request.getParameter("orderNo");
- SortedMap < Object,
- Object > paras = new TreeMap < Object,
- Object > ();
- paras.put("appid", ConfigUtil.APPID);
- paras.put("mch_id", ConfigUtil.MCH_ID);
- paras.put("time_stamp", Long.toString(new Date().getTime()));
- paras.put("nonce_str", PayCommonUtil.CreateNoncestr());
- paras.put("product_id", orderNo); //商品号要唯一
- String sign = PayCommonUtil.createSign("UTF-8", paras);
- paras.put("sign", sign);
- String url = "weixin://wxpay/bizpayurl?sign=SIGN&appid=APPID&mch_id=MCHID&product_id=PRODUCTID&time_stamp=TIMESTAMP&nonce_str=NOCESTR";
- String nativeUrl = url.replace("SIGN", sign).replace("APPID", ConfigUtil.APPID).replace("MCHID", ConfigUtil.MCH_ID).replace("PRODUCTID", (String) paras.get("product_id")).replace("TIMESTAMP", (String) paras.get("time_stamp")).replace("NOCESTR", (String) paras.get("nonce_str"));
- SortedMap < Object,
- Object > parameters = new TreeMap < Object,
- Object > ();
- parameters.put("appid", ConfigUtil.APPID);
- parameters.put("mch_id", ConfigUtil.MCH_ID);
- parameters.put("nonce_str", PayCommonUtil.CreateNoncestr());
- parameters.put("long_url", CommonUtil.urlEncodeUTF8(nativeUrl));
- String sign2 = PayCommonUtil.createSign("UTF-8", parameters);
- parameters.put("sign", sign2);
- String requestXML = PayCommonUtil.getRequestXml(parameters);
- String result = CommonUtil.httpsRequestForStr(ConfigUtil.SHORT_URL, "POST", requestXML);
- Map < String,
- String > map = null;
- try {
- map = XMLUtil.doXMLParse(result);
- } catch(JDOMException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- } catch(IOException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- String returnCode = map.get("return_code");
- String resultCode = map.get("result_code");
- if (returnCode.equalsIgnoreCase("SUCCESS") && resultCode.equalsIgnoreCase("SUCCESS")) {
- String shortUrl = map.get("short_url");
- //TODO 拿到shortUrl,写代码生成二维码
- System.out.println("shortUrl=" + shortUrl);
- try {
- CreateQRCode.createCodeStream(shortUrl, response);
- } catch(Exception e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- }
- }
- public void wxScanCodeHandler(HttpServletRequest request, HttpServletResponse response) throws Exception {
- InputStream inStream = request.getInputStream();
- ByteArrayOutputStream outSteam = new ByteArrayOutputStream();
- byte[] buffer = new byte[1024];
- int len = 0;
- while ((len = inStream.read(buffer)) != -1) {
- outSteam.write(buffer, 0, len);
- }
- outSteam.close();
- inStream.close();
- String result = new String(outSteam.toByteArray(), "utf-8"); //获取微信调用我们notify_url的返回信息
- Map < Object,
- Object > map = null;
- try {
- map = XMLUtil.doXMLParse(result);
- } catch(JDOMException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- for (Object keyValue: map.keySet()) {
- System.out.println(keyValue + "=" + map.get(keyValue));
- }
- String orderNo = map.get("product_id").toString();
- //接收到请求参数后调用统一下单接口
- SortedMap < Object,
- Object > parameters = new TreeMap < Object,
- Object > ();
- parameters.put("appid", ConfigUtil.APPID);
- parameters.put("mch_id", ConfigUtil.MCH_ID);
- parameters.put("device_info", "1000");
- parameters.put("body", "测试扫码支付订单");
- parameters.put("nonce_str", PayCommonUtil.CreateNoncestr());
- parameters.put("out_trade_no", map.get("product_id"));
- //parameters.put("total_fee", String.valueOf(totalPrice));
- parameters.put("total_fee", "1");
- parameters.put("spbill_create_ip", request.getRemoteAddr());
- parameters.put("notify_url", ConfigUtil.NOTIFY_URL);
- parameters.put("trade_type", "NATIVE");
- parameters.put("openid", map.get("openid"));
- String sign = PayCommonUtil.createSign("UTF-8", parameters);
- parameters.put("sign", sign);
- String requestXML = PayCommonUtil.getRequestXml(parameters);
- String result2 = CommonUtil.httpsRequestForStr(ConfigUtil.UNIFIED_ORDER_URL, "POST", requestXML);
- System.out.println("-----------------------------统一下单结果---------------------------");
- System.out.println(result2);
- Map < String,
- String > mm = null;
- try {
- mm = getH5PayMap(result2, request);
- } catch(Exception e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- //String prepayId=getPrepayId(result2,request);
- //String returnNoneStr=getReturnNoneStr(result2,request);
- String prepayId = mm.get("prepay_id");
- String returnNoneStr = mm.get("nonce_str");;
- SortedMap < Object,
- Object > lastSign = new TreeMap < Object,
- Object > ();
- lastSign.put("return_code", "SUCCESS");
- lastSign.put("appid", ConfigUtil.APPID);
- lastSign.put("mch_id", ConfigUtil.MCH_ID);
- lastSign.put("nonce_str", returnNoneStr);
- lastSign.put("prepay_id", prepayId);
- lastSign.put("result_code", "SUCCESS");
- lastSign.put("key", ConfigUtil.API_KEY);
- String lastSignpara = PayCommonUtil.createSign("UTF-8", lastSign);
- StringBuffer buf = new StringBuffer();
- buf.append("<xml>");
- buf.append("<return_code>SUCCESS</return_code>");
- buf.append("<appid>" + ConfigUtil.APPID + "</appid>");
- buf.append("<mch_id>" + ConfigUtil.MCH_ID + "</mch_id>");
- buf.append("<nonce_str>" + returnNoneStr + "</nonce_str>");
- buf.append("<prepay_id>" + prepayId + "</prepay_id>");
- buf.append("<result_code>SUCCESS</result_code>");
- buf.append("<sign>" + lastSignpara + "</sign>");
- buf.append("</xml>");
- response.getWriter().print(buf.toString());
- }
- public Map < String,
- String > getH5PayMap(String result, HttpServletRequest request) throws Exception {
- Map < String,
- String > map = XMLUtil.doXMLParse(result);
- return map;
- }
- }
最终看下公众号支付和扫码支付的微信配置:
希望通过这篇文章,大家能明白就算通过Java来做微信公众号、微信支付而不借助github提供的那些坑人的代码也可以开发出另自己和客户满意的微信应用。虽然微信给出的demo都是PHP的,但这些都是浮云,开发语言是其次,理解接口调用需具备的底层只是才是程序员的必修课。
来源: http://www.phperz.com/article/17/1202/359513.html