java开发Demo~微信扫码支付，java开发示例

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原创最新推荐文章于 2026-03-23 00:39:12 发布 214 阅读 AI 写同款· GEO 优化 ›

微信支付 java 服务端demo （v3版本app支付 springMVC框架中）由于微信官方没有app支付后台demo，前天公司要对接微信支付，经过这两天在网上找的资料以及结合官方文档，今天开发和测试终于顺利收尾，本篇文章仅包含微信app支付v3版本 java后台代码片段，andriod和ios请在官网查看阅读详情

开发所需工具类

开发所需jar

具体的代码不贴了，说明下PayConfigUtil中的参数

APP_ID和APP_SECRET在公众平台

MCH_ID和API_KEY在商户平台,其中API_KEY是自己设置的，并不是自动生成的。

Controller

通过此方法，前往可以生成二维码的页面

//微信前往支付页面

@RequestMapping(value = "towxPay")

public ModelAndView towxPay(ModelMap map,HttpServletRequest request,String chapterId,String chapterName,String price) throws IOException{

ModelAndView mav = new ModelAndView();

mav.setViewName("jsp/pay/weixinpayma");

HttpSession session = request.getSession();

session.setAttribute("chapterId", chapterId);

session.setAttribute("chapterName", chapterName);

session.setAttribute("price", price);

return mav;

}

返回的页面如下

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>

String path = request.getContextPath();

String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort()

+ path + "/";

Insert title here

index/payImg style="min-height:null;min-width:null;" width=null height=null />

/* ajax轮回，不停的访问Controller，直到wxPayType=1时，付款成功 */

var num = 0;

$(function(){

panduanWXPay();

});

function panduanWXPay(){

$.post("<%=basePath%>index/panduanPay",function(data){

var wxPayType = data.wxPayType;

if(wxPayType==1){

/* 成功 */

window.location.href='<%=basePath%>index/gouMai';

}else if(wxPayType==0 && num!=400){

num++;

panduanWXPay();

}else{

alert("支付超时");

}

});

}

payImg方法

//微信支付，生成二维码

@RequestMapping(value = "payImg")

public void payImg(HttpServletRequest request, HttpServletResponse response) throws IOException{

HttpSession session = request.getSession();

String chapterName=(String)session.getAttribute("chapterName");

String price=(String)session.getAttribute("price");

int defaultWidthAndHeight=200;

String nonce_str = PayCommonUtil.getNonce_str();

long time_stamp = System.currentTimeMillis() / 1000;

String product_id = chapterName+"*"+price;//订单名字和价钱，拼到了一起，后面用到的时候再拆

String key = PayConfigUtil.API_KEY; // key

SortedMap packageParams = new TreeMap();

packageParams.put("appid", PayConfigUtil.APP_ID);

packageParams.put("mch_id", PayConfigUtil.MCH_ID);

packageParams.put("time_stamp", String.valueOf(time_stamp));

packageParams.put("nonce_str", nonce_str);

packageParams.put("product_id", product_id);

// packageParams.put("chapterId", chapterId);

// packageParams.put("price", price);

String sign = PayCommonUtil.createSign("UTF-8", packageParams,key);//MD5哈希

packageParams.put("sign", sign);

//生成参数

String str = ToUrlParams(packageParams);

String payurl = "weixin://wxpay/bizpayurl?" + str;

// logger.info("payurl:"+payurl);

//生成二维码

Map hints=new HashMap();

// 指定纠错等级

hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);

// 指定编码格式

hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");

hints.put(EncodeHintType.MARGIN, 1);

try {

BitMatrix bitMatrix = new MultiFormatWriter().encode(payurl,BarcodeFormat.QR_CODE, defaultWidthAndHeight, defaultWidthAndHeight, hints);

OutputStream out = response.getOutputStream();

MatrixToImageWriter.writeToStream(bitMatrix, "png", out);//输出二维码

out.flush();

out.close();

} catch (WriterException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

public String ToUrlParams(SortedMap packageParams){

//实际可以不排序

StringBuffer sb = new StringBuffer();

Set es = packageParams.entrySet();

Iterator it = es.iterator();

while (it.hasNext()) {

Map.Entry entry = (Map.Entry) it.next();

String k = (String) entry.getKey();

String v = (String) entry.getValue();

if (null != v && !"".equals(v)) {

sb.append(k + "=" + v + "&");

}

sb.deleteCharAt(sb.length()-1);//删掉最后一个&

return sb.toString();

}

扫码时触动此方法，会在手机端显示付款信息

要将此方法的路径配置到回调url里，微信公众平台–>微信支付–>开发配置

//微信扫码的时候，触发此方法

@RequestMapping(value = "Re_notify")

public void Re_notify(HttpServletRequest request, HttpServletResponse response) throws IOException{

HttpSession session = request.getSession();

String chapterId=(String)session.getAttribute("chapterId");

String chapterName=(String)session.getAttribute("chapterName");

String price=(String)session.getAttribute("price");

System.out.println(chapterId+":"+chapterName+":"+price);

// 读取xml

InputStream inputStream;

StringBuffer sb = new StringBuffer();

inputStream = request.getInputStream();

String s;

BufferedReader in = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"));

while ((s = in.readLine()) != null) {

sb.append(s);

}

in.close();

inputStream.close();

SortedMap packageParams = PayCommonUtil.xmlConvertToMap(sb.toString());

// logger.info(packageParams);

// 账号信息

String key = PayConfigUtil.API_KEY; // key

String resXml="";//反馈给微信服务器

// 验签

if (PayCommonUtil.isTenpaySign("UTF-8", packageParams, key)) {

//appid openid mch_id is_subscribe nonce_str product_id sign

//统一下单

String openid = (String)packageParams.get("openid");

String product_id = (String)packageParams.get("product_id");

//解析product_id，计算价格等

String thePricce = product_id.substring(product_id.lastIndexOf("*")+1);

String newProductId = product_id.substring(0, product_id.indexOf("*"));

String out_trade_no = String.valueOf(System.currentTimeMillis()); // 订单号

String order_price = thePricce; // 价格"1" 注意：价格的单位是分

String body = newProductId; // 商品名称product_id 这里设置为product_id

String attach = "十倍课"; //附加数据

String nonce_str0 = PayCommonUtil.getNonce_str();

// 获取发起电脑 ip

String spbill_create_ip = PayConfigUtil.CREATE_IP;

String trade_type = "NATIVE";

SortedMap unifiedParams = new TreeMap();

unifiedParams.put("appid", PayConfigUtil.APP_ID); // 必须

unifiedParams.put("mch_id", PayConfigUtil.MCH_ID); // 必须

unifiedParams.put("out_trade_no", out_trade_no); // 必须

unifiedParams.put("product_id", product_id);

unifiedParams.put("body", body); // 必须

unifiedParams.put("attach", attach);

unifiedParams.put("total_fee", order_price); // 必须

unifiedParams.put("nonce_str", nonce_str0); // 必须

unifiedParams.put("spbill_create_ip", spbill_create_ip); // 必须

unifiedParams.put("trade_type", trade_type); // 必须

unifiedParams.put("openid", openid);

unifiedParams.put("notify_url", PayConfigUtil.NOTIFY_URL);//异步通知url

String sign0 = PayCommonUtil.createSign("UTF-8", unifiedParams,key);

unifiedParams.put("sign", sign0); //签名

String requestXML = PayCommonUtil.getRequestXml(unifiedParams);

// logger.info(requestXML);

//统一下单接口

String rXml = HttpUtil.postData(PayConfigUtil.UFDODER_URL, requestXML);

//统一下单响应

SortedMap reParams = PayCommonUtil.xmlConvertToMap(rXml);

// logger.info(reParams);

//验签

if (PayCommonUtil.isTenpaySign("UTF-8", reParams, key)) {

// 统一下单返回的参数

String prepay_id = (String)reParams.get("prepay_id");//交易会话标识 2小时内有效

String nonce_str1 = PayCommonUtil.getNonce_str();

SortedMap resParams = new TreeMap();

resParams.put("return_code", "SUCCESS"); // 必须

resParams.put("return_msg", "OK");

resParams.put("appid", PayConfigUtil.APP_ID); // 必须

resParams.put("mch_id", PayConfigUtil.MCH_ID);

resParams.put("nonce_str", nonce_str1); // 必须

resParams.put("prepay_id", prepay_id); // 必须

resParams.put("result_code", "SUCCESS"); // 必须

resParams.put("err_code_des", "OK");

String sign1 = PayCommonUtil.createSign("UTF-8", resParams,key);

resParams.put("sign", sign1); //签名

resXml = PayCommonUtil.getRequestXml(resParams);

// logger.info(resXml);

}else{

// logger.info("签名验证错误");

resXml = "" + ""

+ "" + " ";

}

}else{

// logger.info("签名验证错误");

resXml = "" + ""

+ "" + " ";

}

//------------------------------

//处理业务完毕

//------------------------------

BufferedOutputStream out = new BufferedOutputStream(

response.getOutputStream());

out.write(resXml.getBytes());

out.flush();

out.close();

}

微信支付成功时访问的方法

密码错误等未支付成功的情况下，不会访问。

此路径是PayConfigUtil中配置的

int wxPayType = 0;

//微信扫码支付回调

@RequestMapping(value = "Notify1")

public void Notify1(HttpServletRequest request, HttpServletResponse response) throws IOException{

InputStream inputStream;

StringBuffer sb = new StringBuffer();

inputStream = request.getInputStream();

String s;

BufferedReader in = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"));

while ((s = in.readLine()) != null) {

sb.append(s);

}

in.close();

inputStream.close();

SortedMap packageParams = PayCommonUtil.xmlConvertToMap(sb.toString());

// logger.info(packageParams);

// 账号信息

String key = PayConfigUtil.API_KEY; // key

String resXml = ""; // 反馈给微信服务器

// 判断签名是否正确

if (PayCommonUtil.isTenpaySign("UTF-8", packageParams, key)) {

// ------------------------------

// 处理业务开始

// ------------------------------

if ("SUCCESS".equals((String) packageParams.get("result_code"))) {

// 这里是支付成功

////////// 执行自己的业务逻辑////////////////

String mch_id = (String) packageParams.get("mch_id");

String openid = (String) packageParams.get("openid");

String is_subscribe = (String) packageParams.get("is_subscribe");

String out_trade_no = (String) packageParams.get("out_trade_no");

String total_fee = (String) packageParams.get("total_fee");

//// 将用于标记是否成功的全局变量wxPayType设置为1，ajax轮回时，可以获取到其变化，从而进行页面跳转////

wxPayType=1;

System.out.println("33333333333333333333333333333:"+wxPayType);

// "支付成功"

// 通知微信.异步确认成功.必写.不然会一直通知后台.八次之后就认为交易失败了.

resXml = "" + ""

+ "" + " ";

} else {

// logger.info("支付失败,错误信息：" + packageParams.get("err_code"));

resXml = "" + ""

+ "" + " ";

}

} else {

// logger.info("签名验证错误");

resXml = "" + ""

+ "" + " ";

}

// ------------------------------

// 处理业务完毕

// ------------------------------

BufferedOutputStream out = new BufferedOutputStream(response.getOutputStream());

out.write(resXml.getBytes());

out.flush();

out.close();

}

ajax不停轮回，判断是否登录成功的方法

@RequestMapping(value = "panduanPay")

@ResponseBody

public Map panduanPay(HttpServletRequest request) throws IOException{

Map map = new HashMap();

try {

Thread.sleep(500);

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

//给页面返回wxPayType值，成功是返回的是1；还未支付成功，返回的是初始值0

map.put("wxPayType",wxPayType);

return map;

}

成功后页面跳转的方法

//购买成功，存入购买表中

@RequestMapping(value="gouMai")

@ResponseBody

public ModelAndView gouMai(HttpServletRequest req,String a,String urlName,String couName,ModelMap map){

ModelAndView mav = new ModelAndView();

Map mapp1 = new HashMap();

// SysUserTab login_user = sysuserService.getSysUserById(userId);

HttpSession session = req.getSession();

SysUserTab login_user1 = (SysUserTab) session.getAttribute("login_user");

String userId = login_user1.getUserId();

// session.setAttribute("login_user", login_user);

String chapterId = (String) session.getAttribute("chapterId");

mapp1.put("userId", userId);

mapp1.put("chapterId", chapterId);

int num = sysBuyService.getBuyCount(mapp1);

if(num==0){

mapp1.put("buyId", UUID.randomUUID().toString().replace("-", ""));

sysBuyService.insertBuy(mapp1);

}

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