微信支付---H5支付(JAVA)

已上傳至github庫 https://github.com/gaoruiqiang2017/weixinpay.git

1、用戶在商戶側完成下單，使用微信支付進行支付
2、由商戶後臺向微信支付發起下單請求（調用統一下單接口）注：交易類型trade_type=MWEB
3、統一下單接口返回支付相關參數給商戶後臺，如支付跳轉url（參數名“mweb_url”），商戶通過mweb_url調起微信支付中間頁
4、中間頁進行H5權限的校驗，安全性檢查（此處常見錯誤請見下文）
5、如支付成功，商戶後臺會接收到微信側的異步通知
6、用戶在微信支付收銀臺完成支付或取消支付,返回商戶頁面（默認爲返回支付發起頁面）
7、商戶在展示頁面，引導用戶主動發起支付結果的查詢
8,9、商戶後臺判斷是否接到收微信側的支付結果通知，如沒有，後臺調用我們的訂單查詢接口確認訂單狀態
10、展示最終的訂單支付結果給用戶

pom

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.1.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.weixinpay</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>demo</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <!--微信支付SDK-->
        <dependency>
            <groupId>com.github.wxpay</groupId>
            <artifactId>wxpay-sdk</artifactId>
            <version>0.0.3</version>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.5</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.47</version>
        </dependency>
        <dependency>
            <groupId>com.google.zxing</groupId>
            <artifactId>core</artifactId>
            <version>3.3.0</version>
        </dependency>
        <dependency>
            <groupId>com.google.zxing</groupId>
            <artifactId>javase</artifactId>
            <version>3.0.0</version>
        </dependency>
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.6</version>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>

        <finalName>demo</finalName>
        <resources>
            <resource>
                <directory>src/main/resources</directory>
                <filtering>true</filtering>
                <includes>
                    <include>**/*.properties</include>
                </includes>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
                <filtering>false</filtering>
                <includes>
                    <include>**</include>
                </includes>
            </resource>
        </resources>
    </build>

</project>

util

/**
 * @Description
 * @Date:03
 */
public class HttpUtil {

    public static String doPost(String url, String requestXml) {
        CloseableHttpClient httpClient = null;
        CloseableHttpResponse httpResponse = null;
        //創建httpClient連接對象
        httpClient = HttpClients.createDefault();
        //創建post請求連接對象
        HttpPost httpPost = new HttpPost(url);
        //創建連接請求對象,並設置連接參數
        RequestConfig requestConfig = RequestConfig.custom()
                .setConnectTimeout(15000)   //連接服務區主機超時時間
                .setConnectionRequestTimeout(60000) //連接請求超時時間
                .setSocketTimeout(60000).build(); //設置讀取響應數據超時時間
        //爲httppost請求設置參數
        httpPost.setConfig(requestConfig);
        //將上傳參數放到entity屬性中
        httpPost.setEntity(new StringEntity(requestXml, "UTF-8"));
        //添加頭信息
        httpPost.addHeader("Content-type", "text/xml");
        String result = "";
        try {
            //發送請求
            httpResponse = httpClient.execute(httpPost);
            //從相應對象中獲取返回內容
            HttpEntity entity = httpResponse.getEntity();
            result = EntityUtils.toString(entity, "UTF-8");
        } catch (IOException e) {
            e.printStackTrace();
        }
        return result;

    }

    /**
     * 獲取IP地址
     *
     * @param request
     * @return
     */
    public static String getIpAddress(HttpServletRequest request) {
        String ip = request.getHeader("x-forwarded-for");
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_CLIENT_IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_X_FORWARDED_FOR");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }
        return ip;
    }
}

properties

appid=wx12822223?22sss
mchId=149232323312333sss
weixinKey=34234234er2werwerwer
unifiedorderUrl=https://api.mch.weixin.qq.com/pay/unifiedorder

接口

/**
 * @Description
 * @Date:03
 */
@RestController
@RequestMapping("/weixinH5pay")
public class WeixinH5pay {

    @Value("${appid}")
    private String appid;  //公衆賬號id

    @Value("${mchid}")
    private String mchId;  //商戶號

    @Value("${weixinKey}")
    private String weixinKey;  //密匙

    @Value("${unifiedorderUrl}")
    private String unifiedorderUrl; //統一下單接口

    /**
     * @param httpServletRequest
     * @param httpServletResponse
     * @param orderNo             訂單號(統一下單接口前自己要又訂單)
     * @param money               金額
     * @param body                商品內容
     */
    @RequestMapping("/h5pay")
    public void h5pay(HttpServletRequest httpServletRequest, HttpServletResponse
            httpServletResponse, String orderNo, String money, String body, Writer writer)
            throws Exception {
        String mapStr = "";
        try {
            HashMap<String, String> dataMap = new HashMap<>();
            dataMap.put("appid", appid); //公衆賬號ID
            dataMap.put("mch_id", mchId); //商戶號
            dataMap.put("nonce_str", WXPayUtil.generateNonceStr()); //隨機字符串，長度要求在32位以內。
            dataMap.put("body", body); //商品描述
            dataMap.put("out_trade_no", orderNo); //商品訂單號
            dataMap.put("total_fee", money); //商品金
            dataMap.put("spbill_create_ip", HttpUtil.getIpAddress(httpServletRequest)); //客戶端ip
            dataMap.put("notify_url", "www.baidu.com"); //通知地址(假設是百度)
            dataMap.put("trade_type", "MWEB"); //交易類型
         //   dataMap.put("scene_info", "{\"h5_info\": {\"type\":\"Wap\",\"wap_url\":
            // \"http://www" +
           //         ".baidu.com\",\"wap_name\": \"學易資源分享平臺\"}}"); //場景信息(其實不寫能用)
            //生成簽名
            String signature = WXPayUtil.generateSignature(dataMap, weixinKey);
            dataMap.put("sign", signature);//簽名
            //將類型爲map的參數轉換爲xml
            String requestXml = WXPayUtil.mapToXml(dataMap);
            //發送參數,調用微信統一下單接口,返回xml
            String responseXml = HttpUtil.doPost(unifiedorderUrl, requestXml);
            System.out.print(responseXml);
            Map<String, String> map = WXPayUtil.xmlToMap(responseXml);
            if ("FAIL".equals(map.get("return_code"))) {
                mapStr = map.get("return_msg");
                writer.write(mapStr);
                return;
            }
            if ("FAIL".equals(map.get("result_code"))) {
                mapStr = map.get("err_code_des");
                writer.write(mapStr);
                return;
            }
            if (map.get("mweb_url") == null || "".equals(map.get("mweb_url"))) {
                mapStr = "mweb_url爲null";
                writer.write(mapStr);
                return;
            }
            //成功返回了mweb_url,拼接支付成功後微信跳轉自定義頁面
            //確認支付過後跳的地址redirectUrl,需要經過urlencode處理(可以不寫,會跳轉默認原吊起微信的頁面
            // 寫了之後前端接收訂單id後再傳給後端,處理訂單狀態)

            //String redirectUrl = "http://www.xxxx.com/xxxxx/my_waRecord.html?orderNo=" + orderNo;
            //redirectUrl = URLEncoder.encode(redirectUrl, "utf-8");
            String url = map.get("mweb_url");//+ "&redirect_url=" + redirectUrl;
            //自動跳轉微信
            StringBuilder urlHtml = new StringBuilder();
            urlHtml.append("<form id=\"weixinPay\" name=\"weixinPay\" action=\"" + url + "\" " +
                    "method=\"" + "post" + "\">");
            urlHtml.append("<input type=\"submit\" value=\"" + "payButton" + "\" " +
                    "style=\"display:none;\"></form>");
            urlHtml.append("<script>document.forms['weixinPay'].submit();</script>");
            httpServletResponse.setContentType("text/html;charset=utf-8");
            httpServletResponse.getWriter().write(urlHtml.toString());
            httpServletResponse.getWriter().flush();
        } catch (Exception e) {
            mapStr = "異常";
        }
        writer.write(mapStr);
    }
    
    /**
     * 異步回調(必須有,得發佈到外網)
     *
     * @param unifiedorderUrl
     * @param requestXml
     * @return
     */
    @RequestMapping("/notifyUrl")
    public String notifyUrl(String unifiedorderUrl, String requestXml) {
        System.out.print("進入支付h5回調=====================");
        //如果沒有加redirectUrl,就這這個接口處理訂單信息
        //判斷接受到的result_code是不是SUCCESS,如果是,則返回成功,具體業務具體分析
        return "success";
    }
}

常見問題
一、回調頁面

正常流程用戶支付完成後會返回至發起支付的頁面，如需返回至指定頁面，則可以在MWEB_URL後拼接上redirect_url參數，來指定回調頁面。

如，您希望用戶支付完成後跳轉至https://www.wechatpay.com.cn，則可以做如下處理：

假設您通過統一下單接口獲到的MWEB_URL= https://wx.tenpay.com/cgi-bin/mmpayweb-bin/checkmweb?prepay_id=wx20161110163838f231619da20804912345&package=1037687096

則拼接後的地址爲MWEB_URL= https://wx.tenpay.com/cgi-bin/mmpayweb-bin/checkmweb?prepay_id=wx20161110163838f231619da20804912345&package=1037687096&redirect_url=https%3A%2F%2Fwww.wechatpay.com.cn

注意：
1.需對redirect_url進行urlencode處理

2.由於設置redirect_url後,回跳指定頁面的操作可能發生在：1,微信支付中間頁調起微信收銀臺後超過5秒 2,用戶點擊“取消支付“或支付完成後點“完成”按鈕。因此無法保證頁面回跳時，支付流程已結束，所以商戶設置的redirect_url地址不能自動執行查單操作，應讓用戶去點擊按鈕觸發查單操作。

分享個別人的連接

h5支付

微信支付---H5支付(JAVA)

pom

util

properties

接口

分享個別人的連接

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