JSAPI微信支付java
前期准备：
首先要有公众号（服务号）和商户号；在微信商户平台-->产品中心-->AppID账号管理中，关联AppID账号
1、导入maven依赖
com.github.wxpay
wxpay-sdk
0.0.3
2、公众号设置（注：支付授权目录写到访问路径的controller的那一级就可以了，不要写到方法，页面支付授权路径直接配置页面的顶级域名即可）
3、获取openid
@RequestMapping("/")
public void wxlogin(HttpServletResponse response) {
try {
// 第一步：用户同意授权，获取code
String url = "https://open.weixin.qq.com/connect/oauth2/authorize?appid=" + wxAppID +
"&redirect_uri=" + wxUrl+"/test/wxcallback" +
"&response_type=code" +
"&scope=snsapi_base" +
"&state=STATE#wechat_redirect";
response.sendRedirect(url);
} catch (IOException e) {
e.printStackTrace();
}
}
@RequestMapping("/wxcallback")
public String wxcallback(String code){
// 第二步：通过code换取网页授权access_token
String url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=" + wxAppID +
"&secret=" + secret +
"&code=" + code +
"&grant_type=authorization_code";
ResponseEntity res = restTemplate.getForEntity(url, String.class);
JSONObject jsonObject = JSONObject.parseObject(res.getBody());
return jsonObject.get("openid").toString(); 4、统一下单（生成签名的顺序不要变）
public Result unifiedOrderJSAPI(Map orderMap, HttpServletRequest request) {
Map returnMap = new HashMap<>();
Map responseMap = new HashMap<>();
Map data = new HashMap<>();
String orderNo = null;
try {
//如果订单不为空
if (orderMap != null){
orderNo = orderMap.get("id").toString();
Double amount = Double.parseDouble(orderMap.get("sfprice").toString());
//支付参数
WXPay wxpay = new WXPay(config);
data.put("appid", config.getAppID());
data.put("secret", config.getSecret());
data.put("body", "订单支付");
data.put("mch_id", config.getMchID());
data.put("notify_url", config.getWxPayNotifyUrl());//异步通知地址（请注意必须是外网）
data.put("out_trade_no", orderNo);
data.put("spbill_create_ip", getIpAddress(request)); //自己的服务器IP地址
data.put("openid", orderMap.get("openId").toString()); //openId
data.put("total_fee", String.valueOf((int) (amount * 100)));
data.put("trade_type", "JSAPI");//交易类型JSAPI支付
String s = WXPayUtil.generateSignature(data, config.getKey()); //签名
data.put("sign", s);//签名
//使用官方API请求预付订单
Map resultMap = wxpay.unifiedOrder(data);
//获取返回码
String returnCode = resultMap.get("return_code");
//若返回码为SUCCESS，则会返回一个result_code,再对该result_code进行判断
if ("SUCCESS".equals(returnCode)) {
String resultCode = resultMap.get("result_code");
if ("SUCCESS".equals(resultCode)) {
responseMap = resultMap;
}
}
if (responseMap == null || responseMap.isEmpty()) {
return ResultUtil.error("获取预支付交易会话标识失败"+responseMap);
}
// 3、签名生成算法
Long time = System.currentTimeMillis() / 1000;
String timestamp = time.toString();
returnMap.put("appId", config.getAppID());
returnMap.put("nonceStr", responseMap.get("nonce_str"));
returnMap.put("package", "prepay_id="+responseMap.get("prepay_id"));
returnMap.put("signType", "MD5");
returnMap.put("timeStamp", timestamp);
returnMap.put("paySign", WXPayUtil.generateSignature(returnMap, config.getKey()));//微信支付签名
}
return ResultUtil.success(returnMap);
} catch (Exception e) {
logger.error("订单号：{}，错误信息：{}", orderNo, e.getStackTrace());
return ResultUtil.error("微信支付统一下单失败");
}
} 5、获取jssdk配置信息
@RequestMapping("/weixinInfo")
public Result weixinInfo( @RequestBody Map param) {
try {
//1、获取AccessToken jsapi_ticket
Map tokenMap = tokenMap();
String accessToken = tokenMap.get("accessToken");
String jsapiTicket = tokenMap.get("ticket");
//2、时间戳和随机字符串
String noncestr = UUID.randomUUID().toString().replace("-", "").substring(0, 16);//随机字符串
String timestamp = String.valueOf(System.currentTimeMillis() / 1000);//时间戳
//3、获取url
String url = config.getUrl();
//4、将参数排序并拼接字符串
String str = "jsapi_ticket=" + jsapiTicket + "&noncestr=" + noncestr + "×tamp=" + timestamp + "&url=" + param.get("url");
logger.info("参数拼接的字符串：" + str);
//5、将字符串进行sha1加密
String signature = SHA1(str);
logger.info("签名：" + signature);
Map data = new HashMap<>();
data.put("timestamp", timestamp);
data.put("nonceStr", noncestr);
data.put("signature", signature);
data.put("accessToken", accessToken);
data.put("appId", config.getAppID());
return ResultUtil.success(data);
} catch (Exception e) {
logger.error("获取微信信息的错误", e);
return ResultUtil.error("获取微信信息的错误");
}
}
public String getAccessToken(){
String url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential" + "&appid=" + config.getAppID() + "&secret="+ config.getSecret();
ResponseEntity res = restTemplate.getForEntity(url, String.class);
JSONObject jsonObject = JSONObject.parseObject(res.getBody());
String accessToken = jsonObject.getString("access_token");
redisTemplate.opsForValue().set("accessToken",accessToken,2L, TimeUnit.HOURS);
return accessToken;
}
public String getTicket(String accessToken){
String url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=" + accessToken + "&type=jsapi";// 这个url链接和参数不能变
ResponseEntity res = restTemplate.getForEntity(url, String.class);
JSONObject jsonObject = JSONObject.parseObject(res.getBody());
String ticket = jsonObject.getString("ticket");
redisTemplate.opsForValue().set("ticket",ticket,2L, TimeUnit.HOURS);
return ticket;
}
public Map tokenMap(){
Map tokenMap=new HashMap<>();
String accessToken = null;
String ticket = null;
if (redisTemplate.opsForValue().get("access_token") != null){
accessToken = redisTemplate.opsForValue().get("access_token").toString();
}else{
accessToken = getAccessToken();
}
if (redisTemplate.opsForValue().get("ticket") != null){
ticket = redisTemplate.opsForValue().get("ticket").toString();
}else{
ticket = getTicket(accessToken);
}
tokenMap.put("accessToken",accessToken);
tokenMap.put("ticket",ticket);
return tokenMap;
}
public static String SHA1(String decript) {
try {
MessageDigest digest = java.security.MessageDigest.getInstance("SHA-1");
digest.update(decript.getBytes());
byte messageDigest[] = digest.digest();
// Create Hex String
StringBuffer hexString = new StringBuffer();
// 字节数组转换为 十六进制 数
for (int i = 0; i < messageDigest.length; i++) {
String shaHex = Integer.toHexString(messageDigest[i] & 0xFF);
if (shaHex.length() < 2) {
hexString.append(0);
}
hexString.append(shaHex);
}
return hexString.toString();
} catch (NoSuchAlgorithmException e) {
logger.error("SHA1发生错误", e);
}
return "";
} 6、支付页面