java实现微信h5支付

淡淡的烟草味﹌ 2022-06-04 08:59 917阅读 0赞

微信h5支付需要在微信商户平台-》产品中心开通h5支付。  
![这里写图片描述][SouthEast]  
官网提供的开发文档中需要的参数：  
![这里写图片描述][SouthEast 1]![这里写图片描述][SouthEast 2]![这里写图片描述][SouthEast 3]  
h5支付主要是scene\_info中的参数wap\_url必须是可以访问到的地址。spbill\_create\_ip的获取必须和调起微信支付的ip一致。  
代码实现如下：  
action中代码：

private static DecimalFormat df = new DecimalFormat("0.00");
     @Action("weChatUnifiedorder")
       public String weChatUnifiedorder(){
    	   try {
    df.setRoundingMode(RoundingMode.HALF_UP);
    // 获取用户ID
    			String memberId = Struts2Utils.getRequest().getParameter("memberId");
    			String integer = Struts2Utils.getRequest().getParameter("integer");
    			String type = Struts2Utils.getRequest().getParameter("type");
    //我这里的ip直接从前端页面获取部分手机不能获取
    			String spbill_create_ip = Struts2Utils.getRequest().getParameter("ip");
    			if (StringUtils.isNotBlank(memberId)
    					&& StringUtils.isNotBlank(integer)
    					&& StringUtils.isNotBlank(type)) {
    				Integer score = Integer.valueOf(integer);
    				// 产生订单号
    				String outTradeNo = UuIdUtils.getUUID();
    				// WeixinConfigUtils config = new WeixinConfigUtils();
    				// 参数组
    				String appid = config.appid;
    				String mch_id = config.mch_id;
    				String nonce_str = RandCharsUtils.getRandomString(16);
    				String body = "";	
    				if (type.equals("0")) {
    					body = "购买" + score + "积分,支付" + df.format(score / 100)
    							+ "元";
    				} else if (type.equals("1")) {
    					body = "购买商品支付" + String.valueOf(score / 100) + "元";
    				}
    				String attach = "暂时无用（这个用于区分不同版本）";
    				String out_trade_no = outTradeNo;
    				int total_fee = score;// 单位是分，现在按照ios传递过来的参数进行
    				String notify_url = config.notify_url;
    				String trade_type = "MWEB";
    				// 参数：开始生成第一次签名
    				parameters.put("appid", appid);
    				parameters.put("mch_id", mch_id);
    				parameters.put("body", body);
    				parameters.put("nonce_str", nonce_str);
    				parameters.put("attach", attach);
    				parameters.put("out_trade_no", out_trade_no);
    				parameters.put("total_fee", total_fee);
    				parameters.put("notify_url", notify_url);
    				parameters.put("trade_type", trade_type);
    				parameters.put("spbill_create_ip", spbill_create_ip);
    				parameters.put("scene_info", "'h5_info':{'type':'Wap','wap_url':'www.abc.com（必须可以直接访问，**这里不要带http://**）','wap_name': '应用名（会在微信订单页显示）'}");
    				String sign = WXSignUtils.createSign("UTF-8", parameters);
    				// 微信统一下单
    				unifiedorder.setAppid(appid);
    				unifiedorder.setMch_id(mch_id);
    				unifiedorder.setNonce_str(nonce_str);
    				unifiedorder.setSign(sign);
    				unifiedorder.setBody(body);
    				unifiedorder.setAttach(attach);
    				unifiedorder.setOut_trade_no(out_trade_no);
    				unifiedorder.setTotal_fee(total_fee);
    				unifiedorder.setSpbill_create_ip(spbill_create_ip);
    				unifiedorder.setNotify_url(notify_url);
    				unifiedorder.setTrade_type(trade_type);
    				unifiedorder.setScene_info("'h5_info':{'type':'Wap','wap_url':'http://www.abc.com（必须可以直接访问**这里不要带http://**）','wap_name': '应用名（会在微信订单页显示）'}");
    				Map<String, String> msgMap = HttpXmlUtils.getUrl(unifiedorder);
    				if (msgMap.get("return_code").equals("SUCCESS") && msgMap.get("result_code").equals("SUCCESS")) {
    					aLiPay.setApp_id(appid);
    					aLiPay.setSubject(body);
    					aLiPay.setScore(integer);
    					aLiPay.setGmt_create(simpleDateFormat.format(new Date()));
    					if (null != memberId && !"".equals(memberId)) {
    						aLiPay.setMember(memberService.getMemberById(Integer
    								.valueOf(memberId)));
    					}
    					aLiPay.setOut_trade_no(out_trade_no);
    					aLiPay.setPayStatus(PayStatusEnum.WAITPAY.getComment());
    					aLiPay.setPayType(PayTypeEnum.WEIXIN.getComment());
    					aLiPay.setState(0);
    					aLiPay.setTotal_amount(String.valueOf(total_fee / 100));
    					aLiPay.setSign(sign);
    					aLiPay.setTotalFee(total_fee);
    					aLiPayService.addALiPay(aLiPay);
    					msg.put("ok", true);
    	//将回调地址发回前端，支付完成后会自动跳转该页面(回调url必须带http://)
    					msg.put("url", msgMap.get("mweb_url")+"&redirect_url=http://www.jabc.com/member/toMemberIntegral.do");
    					Struts2Utils.renderJson(msg);
    				}else {
    					msg.put("ok", false);
    				}
    			}
    			return NONE;
    		} catch (Exception e) {
    			log.error(e.getMessage());
    			return "500";
    		}
       }

微信支付签名代码：

public class WXSignUtils {
    	/**
    	 * 微信支付签名算法sign
    	 * @param characterEncoding
    	 * @param parameters
    	 * @return
    	 */
    	@SuppressWarnings("rawtypes")
    	public static String createSign(String characterEncoding,SortedMap<Object,Object> parameters){
    		StringBuffer sb = new StringBuffer();
    		Set es = parameters.entrySet();//所有参与传参的参数按照accsii排序（升序）
    		Iterator it = es.iterator();
    		while(it.hasNext()) {
    			Map.Entry entry = (Map.Entry)it.next();
    			String k = (String)entry.getKey();
    			Object v = entry.getValue();
    			if(null != v && !"".equals(v) 
    					&& !"sign".equals(k) && !"key".equals(k)) {
    				sb.append(k + "=" + v + "&");
    			}
    		}
    		sb.append("key=" + weixinConstant.KEY);
    		String sign = MD5Util.MD5Encode(sb.toString(), characterEncoding).toUpperCase();
    		return sign;
    	}
    }

向微信发送post数据并解析返回的微信订单号

public class HttpXmlUtils {
    /**
    	 * h5支付时 解析返回的值并返回prepareid
    	 * @throws IOException 
    	 * @throws JDOMException 
    	 */
    	public static Map<String, String> getUrl(Unifiedorder unifiedorder) throws JDOMException, IOException{
    	//构造xml
    		String xmlInfo = HttpXmlUtils.xmlH5Info(unifiedorder);
    		String wxUrl = "https://api.mch.weixin.qq.com/pay/unifiedorder";
    		String method = "POST";
    		//获取微信返回的结果
    		String weixinPost = HttpXmlUtils.httpsRequest(wxUrl, method, xmlInfo).toString();
    		//解析返回的xml
    		ParseXMLUtils.jdomParseXml(weixinPost);
    		StringReader read = new StringReader(weixinPost);
    		// 创建新的输入源SAX 解析器将使用 InputSource 对象来确定如何读取 XML 输入
    		InputSource source = new InputSource(read);
    		// 创建一个新的SAXBuilder
    		SAXBuilder sb = new SAXBuilder();
    		// 通过输入源构造一个Document
    		org.jdom.Document doc;
    		doc = (org.jdom.Document) sb.build(source);
    		org.jdom.Element root = doc.getRootElement();// 指向根节点
    		List<org.jdom.Element> list = root.getChildren();
    		String prepayId =null;
    		Map<String, String> msg = new HashMap<String, String>();
    		if(list!=null&&list.size()>0){
    			for (org.jdom.Element element : list) {
    			msg.put(element.getName(), element.getText());
    			}
    			}
    		return msg;
    	}
    	/**
    	 * 构造xml参数
    	 * @param xml
    	 * @return
    	 */
    	public static String xmlH5Info(Unifiedorder unifiedorder){
    		if(unifiedorder!=null){
    			StringBuffer bf = new StringBuffer();
    			bf.append("<xml>");
    
    			bf.append("<appid><![CDATA[");
    			bf.append(unifiedorder.getAppid());
    			bf.append("]]></appid>");
    
    			bf.append("<mch_id><![CDATA[");
    			bf.append(unifiedorder.getMch_id());
    			bf.append("]]></mch_id>");
    
    			bf.append("<nonce_str><![CDATA[");
    			bf.append(unifiedorder.getNonce_str());
    			bf.append("]]></nonce_str>");
    
    			bf.append("<sign><![CDATA[");
    			bf.append(unifiedorder.getSign());
    			bf.append("]]></sign>");
    
    			bf.append("<body><![CDATA[");
    			bf.append(unifiedorder.getBody());
    			bf.append("]]></body>");
    
    
    			bf.append("<attach><![CDATA[");
    			bf.append(unifiedorder.getAttach());
    			bf.append("]]></attach>");
    
    			bf.append("<out_trade_no><![CDATA[");
    			bf.append(unifiedorder.getOut_trade_no());
    			bf.append("]]></out_trade_no>");
    
    			bf.append("<total_fee><![CDATA[");
    			bf.append(unifiedorder.getTotal_fee());
    			bf.append("]]></total_fee>");
    
    			bf.append("<spbill_create_ip><![CDATA[");
    			bf.append(unifiedorder.getSpbill_create_ip());
    			bf.append("]]></spbill_create_ip>");
    
    			bf.append("<notify_url><![CDATA[");
    			bf.append(unifiedorder.getNotify_url());
    			bf.append("]]></notify_url>");
    
    			bf.append("<trade_type><![CDATA[");
    			bf.append(unifiedorder.getTrade_type());
    			bf.append("]]></trade_type>");
    			
    			bf.append("<scene_info><![CDATA[");
    			bf.append(unifiedorder.getScene_info());
    			bf.append("]]></scene_info>");
    			
    			bf.append("</xml>");
    			return bf.toString();
    		}
    		return "";
    	}
    /**
    	 * post请求并得到返回结果
    	 * @param requestUrl
    	 * @param requestMethod
    	 * @param output
    	 * @return
    	 */
    	public static String httpsRequest(String requestUrl, String requestMethod, String output) {
    		try{
    			URL url = new URL(requestUrl);
    			HttpsURLConnection connection = (HttpsURLConnection) url.openConnection();
    			connection.setDoOutput(true);
    			connection.setDoInput(true);
    			connection.setUseCaches(false);
    			connection.setRequestMethod(requestMethod);
    			if (null != output) {
    				OutputStream outputStream = connection.getOutputStream();
    				outputStream.write(output.getBytes("UTF-8"));
    				outputStream.close();
    			}
    			// 从输入流读取返回内容
    			InputStream inputStream = connection.getInputStream();
    			InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
    			BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
    			String str = null;
    			StringBuffer buffer = new StringBuffer();
    			while ((str = bufferedReader.readLine()) != null) {
    				buffer.append(str);
    			}
    			bufferedReader.close();
    			inputStreamReader.close();
    			inputStream.close();
    			inputStream = null;
    			connection.disconnect();
    			return buffer.toString();
    		}catch(Exception ex){
    			ex.printStackTrace();
    		}
    		return "";
    	}
    }

解析微信返回的xml

/**
    	 * 3、JDOM解析XML
    	 * 解析的时候自动去掉CDMA
    	 * @param xml
    	 */
    	@SuppressWarnings("unchecked")
    	public static void jdomParseXml(String xml){
    		try { 
    			StringReader read = new StringReader(xml);
    			// 创建新的输入源SAX 解析器将使用 InputSource 对象来确定如何读取 XML 输入
    			InputSource source = new InputSource(read);
    			// 创建一个新的SAXBuilder
    			SAXBuilder sb = new SAXBuilder();
    			// 通过输入源构造一个Document
    			org.jdom.Document doc;
    			doc = (org.jdom.Document) sb.build(source);
    
    			org.jdom.Element root = doc.getRootElement();// 指向根节点
    			List<org.jdom.Element> list = root.getChildren();
    
    			if(list!=null&&list.size()>0){
    				for (org.jdom.Element element : list) {
    				}
    			}
    
    		} catch (JDOMException e) {
    			e.printStackTrace();
    		}  catch (IOException e) {
    			e.printStackTrace();
    		}catch (Exception e) {
    			e.printStackTrace();
    		}
    	}

封装支付参数的实体类：（参数名与官网参数名一致，此类封装了h5、app支付和退款的参数）

import java.io.Serializable;
    
    /**
     * 统一下单提交为微信的参数
     * @author 
     * @date 2017年08月11日
     */
    public class Unifiedorder implements Serializable{
    	private static final long serialVersionUID = 1L;
    	//微信支付表id
    	private Integer weixinId;
    	//微信分配的公众账号ID（企业号corpid即为此appId）
    	private String appid;
    	//商户id
    	private String mch_id;
    	//终端设备号(门店号或收银设备ID)，注意：PC网页或公众号内支付请传"WEB"
    	private String device_info;
    	//随机字符串:数字+大写字母的组合，32位
    	private String nonce_str;
    	//签名
    	private String sign;
    	//商品或支付单简要描述
    	private String body;
    	//商品名称明细列表
    	private String detail;
    	//附加参数（例如：用于区别本商户不同的分店）
    	private String attach;
    	//商户系统内部的订单号
    	private String out_trade_no;
    	//货币类型:符合ISO 4217标准的三位字母代码，默认人民币：CNY
    	private String fee_type;
    	//总金额
    	private int total_fee;
    	//APP和网页支付提交[用户端ip]，Native支付填调用微信支付API的机器IP。
    	private String spbill_create_ip;
    	//订单生成时间，格式为yyyyMMddHHmmss，
    	private String time_start;
    	//订单失效时间，格式为yyyyMMddHHmmss，最短失效时间间隔必须大于5分钟[支付宝是30分钟，同样30分钟]
    	private String time_expire;
    	//商品标记，代金券或立减优惠功能的参数
    	private String goods_tag;
    	//接收微信支付异步通知回调地址
    	private String notify_url;
    	//交易类型:JSAPI，NATIVE，APP h5为 MWEB
    	private String trade_type;
    	//trade_type=NATIVE，此参数必传。此id为二维码中包含的商品ID，商户自行定义。
    	private String product_id;
    	//no_credit--指定不能使用信用卡支付
    	private String limit_pay;
    	//trade_type=JSAPI，此参数必传，用户在商户appid下的唯一标识
    	private String openid;
    	//商户内部自己的退款单号
    	private String out_refund_no;
    	//退款总金额单位为分
    	private int refund_fee;
    	//操作员的id默认为mch_id
    	private String op_user_id;
    	//微信官方提供的订单号
    	private String prepayid;
    	//记录所对应的member
    	private Member member;
    	//返回给微信的状态码（用于支付回调时）
    	public String return_code;
    	//微信h5支付时候的场景信息官方的信息模板 {"h5_info"://h5支付固定传"h5_info" 
        //{"type":"",//场景类型 "wap_url":"",//WAP网站URL地址"wap_name": ""//WAP 网站名}}
    	public String scene_info;
    	public String getScene_info() {
    		return scene_info;
    	}
    	public void setScene_info(String scene_info) {
    		this.scene_info = scene_info;
    	}
    	public String getReturn_code() {
    		return return_code;
    	}
    	public void setReturn_code(String return_code) {
    		this.return_code = return_code;
    	}
    	public String getAppid() {
    		return appid;
    	}
    	public String getMch_id() {
    		return mch_id;
    	}
    	public String getDevice_info() {
    		return device_info;
    	}
    	public String getNonce_str() {
    		return nonce_str;
    	}
    	public String getSign() {
    		return sign;
    	}
    	public String getBody() {
    		return body;
    	}
    	public String getDetail() {
    		return detail;
    	}
    	public String getAttach() {
    		return attach;
    	}
    	public String getOut_trade_no() {
    		return out_trade_no;
    	}
    	public String getFee_type() {
    		return fee_type;
    	}
    	public int getTotal_fee() {
    		return total_fee;
    	}
    	public String getSpbill_create_ip() {
    		return spbill_create_ip;
    	}
    	public String getTime_start() {
    		return time_start;
    	}
    	public String getTime_expire() {
    		return time_expire;
    	}
    	public String getGoods_tag() {
    		return goods_tag;
    	}
    	public String getNotify_url() {
    		return notify_url;
    	}
    	public String getTrade_type() {
    		return trade_type;
    	}
    	public String getProduct_id() {
    		return product_id;
    	}
    	public String getLimit_pay() {
    		return limit_pay;
    	}
    	public String getOpenid() {
    		return openid;
    	}
    	public void setAppid(String appid) {
    		this.appid = appid;
    	}
    	public void setMch_id(String mch_id) {
    		this.mch_id = mch_id;
    	}
    	public void setDevice_info(String device_info) {
    		this.device_info = device_info;
    	}
    	public void setNonce_str(String nonce_str) {
    		this.nonce_str = nonce_str;
    	}
    	public void setSign(String sign) {
    		this.sign = sign;
    	}
    	public void setBody(String body) {
    		this.body = body;
    	}
    	public void setDetail(String detail) {
    		this.detail = detail;
    	}
    	public void setAttach(String attach) {
    		this.attach = attach;
    	}
    	public void setOut_trade_no(String out_trade_no) {
    		this.out_trade_no = out_trade_no;
    	}
    	public void setFee_type(String fee_type) {
    		this.fee_type = fee_type;
    	}
    	public void setTotal_fee(int total_fee) {
    		this.total_fee = total_fee;
    	}
    	public void setSpbill_create_ip(String spbill_create_ip) {
    		this.spbill_create_ip = spbill_create_ip;
    	}
    	public void setTime_start(String time_start) {
    		this.time_start = time_start;
    	}
    	public void setTime_expire(String time_expire) {
    		this.time_expire = time_expire;
    	}
    	public void setGoods_tag(String goods_tag) {
    		this.goods_tag = goods_tag;
    	}
    	public void setNotify_url(String notify_url) {
    		this.notify_url = notify_url;
    	}
    	public void setTrade_type(String trade_type) {
    		this.trade_type = trade_type;
    	}
    	public void setProduct_id(String product_id) {
    		this.product_id = product_id;
    	}
    	public void setLimit_pay(String limit_pay) {
    		this.limit_pay = limit_pay;
    	}
    	public void setOpenid(String openid) {
    		this.openid = openid;
    	}
    	public String getOut_refund_no() {
    		return out_refund_no;
    	}
    	public void setOut_refund_no(String out_refund_no) {
    		this.out_refund_no = out_refund_no;
    	}
    	public int getRefund_fee() {
    		return refund_fee;
    	}
    	public void setRefund_fee(int refund_fee) {
    		this.refund_fee = refund_fee;
    	}
    	public Integer getWeixinId() {
    		return weixinId;
    	}
    	public void setWeixinId(Integer weixinId) {
    		this.weixinId = weixinId;
    	}
    	public Member getMember() {
    		return member;
    	}
    	public void setMember(Member member) {
    		this.member = member;
    	}
    	public String getPrepayid() {
    		return prepayid;
    	}
    	public void setPrepayid(String prepayid) {
    		this.prepayid = prepayid;
    	}
    	public String getOp_user_id() {
    		return op_user_id;
    	}
    	public void setOp_user_id(String op_user_id) {
    		this.op_user_id = op_user_id;
    	}
    	
    
    }

前端获取ip：

前端页面代码：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <html>
      <head>
    	<meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    	<meta http-equiv="X-UA-Compatible" content="ie=edge">
    	<link rel="stylesheet" href="${basePath}/css/mui.min.css">
    	<%@ include file="../common/base.jsp"%>
        <title>积分充值</title>
        <script src="${basePath}/js/mui.min.js"></script>
        <link rel="stylesheet" type="text/css" href="${basePath }/css/recharge-integral.css">
        
    
      </head>
      
      <body>
       <header>
    			<i><a href="javascript:history.go(-1)"><img src="${basePath }/images/left-ico.png"/></a></i>
    			<h1>积分</h1>
    		</header>
    		<div class="recharge-wrap" id="pay">
    			<dl>
    				<dt>您当前积分为 <span>${sessionScope.member.sumIntegral}分</span></dt>
    
    				<dd class="buy">
    					本次要购买积分数
    					<i class="jia"></i>
    
    					<input id="score" type="number" value="100" readonly="readonly">
    
    					<i class="jian"></i>
    				</dd>
    				<dd class="tip"> 一元可购买100积分</dd>
    
    				<dd class="clear">
    					<span>支付方式</span>
    
    					<ul>
    						<li><i class="check-active"></i> 支付宝</li>
    						<li><i class="weixinPay"></i>微信</li> 
    					</ul>
    				</dd>
    
    			</dl>
    
    			<button type="button" onclick="alipay()">确认购买</button>
    
    		</div>
      </body>
      <script src="http://pv.sohu.com/cityjson?ie=utf-8"></script>
      <script>
    var ip = returnCitySN.cip;
      var num = $("input[type=number]");
    			
    		  $(".weixinPay").on('click',function(){
              	mui.alert('您将要进入微信页面,若需要返回本系统,请点击浏览器的返回按钮!', '提示', function() {
    				$.ajax({
    					type : "post",
    					url : "${basePath}/weChat/weChatUnifiedorder.do ",
    					data : {
    					"integer":numVal,
    					"type":0,
    					"memberId":${sessionScope.member.memberId},
    					"ip":ip
    					},
    					datatype : "json",
    					success : function(data){
    						if(data.ok){
    						window.location.href=data.url;
    						}else{
    						window.location.href="${basePath}/weChat/500.do ";
    						}
    					},error:function(){
    						alert("后台错误，请联系管理员！");
    					}
    				});
    			});
            });
    	</script>
    </html>

在h5支付时出现的一些问题  
![这个][SouthEast 4]  
这个页面就是你传递的ip和微信获取的发起支付的ip不一致，这个时候你就要检查获取ip的代码  
![这里写图片描述][SouthEast 5]  
出现这个情况的原因有两个1.你的scene\_info中的wap\_url与你配置的授权域名不一致，需要去商户平台的产品中心->开发配置中修改 2. 配置的redirect\_url与授权域名不一致，需要修改。  
这个地方还有其他的一些错误，我没遇到，以上两个错误我遇到很多次，后来查看官方文档才看见的（[https://pay.weixin.qq.com/wiki/doc/api/H5.php?chapter=15\_4）。][https_pay.weixin.qq.com_wiki_doc_api_H5.php_chapter_15_4]

[SouthEast]: /images/20220604/f9706ddf837542f890b9859671c5b047.png
[SouthEast 1]: https://img-blog.csdn.net/20171209162008257?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvZ2l0aHViXzM4OTI0Njk1/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast
[SouthEast 2]: https://img-blog.csdn.net/20171209162027642?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvZ2l0aHViXzM4OTI0Njk1/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast
[SouthEast 3]: /images/20220604/ef703d4facb24fc4b16e43ce570163db.png
[SouthEast 4]: /images/20220604/aa2e6872a80b4f4ea8cf96909cd77293.png
[SouthEast 5]: /images/20220604/3a919c4cc75e40e7a08717e22045f211.png
[https_pay.weixin.qq.com_wiki_doc_api_H5.php_chapter_15_4]: https://pay.weixin.qq.com/wiki/doc/api/H5.php?chapter=15_4%EF%BC%89%E3%80%82