Java实现公众号H5 微信支付

来源：互联网发布：mac微信接收的文件编辑：程序博客网时间：2024/04/30 23:37

最近由于有微信项目使用到了微信支付这功能，我原本以为跟调用其它js接口一样，非常简单，实则不然，因为微信团队留下了很多天坑，提供的文档全是老版的，下载下来无法使用，导致这个支付功能害我整整调了一天，全是微信团队留下的坑，有些签名并不是下载事例所说那样，接下来我将分享通过自身努力实现的微信支付成果：
第一步：微信支付配置文件 ConfigUtil
/**
* 微信支付配置文件
* @author Mark
*
*/

public class ConfigUtil {
/**
* 服务号相关信息
*/
public final static String APPID = “”;//服务号的appid
public final static String APP_SECRECT = “”;//服务号的appSecrect
public final static String TOKEN = ” “;//服务号的配置token
public final static String MCH_ID = “”;//开通微信支付分配的商户号
public final static String API_KEY = “”;//商户API密钥自行去商户平台设置
public final static String SIGN_TYPE = “MD5”;//签名加密方式
//微信支付统一接口的回调action
public final static String NOTIFY_URL = “”; //用于告知微信服务器调用成功

/** * 微信基础接口地址 */ //获取token接口(GET) public final static String TOKEN_URL = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET"; //oauth2授权接口(GET) public final static String OAUTH2_URL = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=APPID&secret=SECRET&code=CODE&grant_type=authorization_code"; //刷新access_token接口（GET） public final static String REFRESH_TOKEN_URL = "https://api.weixin.qq.com/sns/oauth2/refresh_token?appid=APPID&grant_type=refresh_token&refresh_token=REFRESH_TOKEN";// 菜单创建接口（POST） public final static String MENU_CREATE_URL = "https://api.weixin.qq.com/cgi-bin/menu/create?access_token=ACCESS_TOKEN";// 菜单查询（GET） public final static String MENU_GET_URL = "https://api.weixin.qq.com/cgi-bin/menu/get?access_token=ACCESS_TOKEN";// 菜单删除（GET）public final static String MENU_DELETE_URL = "https://api.weixin.qq.com/cgi-bin/menu/delete?access_token=ACCESS_TOKEN";/** * 微信支付接口地址 *///微信支付统一接口(POST)public final static String UNIFIED_ORDER_URL = "https://api.mch.weixin.qq.com/pay/unifiedorder";//微信退款接口(POST)public final static String REFUND_URL = "https://api.mch.weixin.qq.com/secapi/pay/refund";//订单查询接口(POST)public final static String CHECK_ORDER_URL = "https://api.mch.weixin.qq.com/pay/orderquery";//关闭订单接口(POST)public final static String CLOSE_ORDER_URL = "https://api.mch.weixin.qq.com/pay/closeorder";//退款查询接口(POST)public final static String CHECK_REFUND_URL = "https://api.mch.weixin.qq.com/pay/refundquery";//对账单接口(POST)public final static String DOWNLOAD_BILL_URL = "https://api.mch.weixin.qq.com/pay/downloadbill";//短链接转换接口(POST)public final static String SHORT_URL = "https://api.mch.weixin.qq.com/tools/shorturl";//接口调用上报接口(POST)public final static String REPORT_URL = "https://api.mch.weixin.qq.com/payitil/report";

}
第二步：通用工具类 CommonUtil （用于请求接口）
/**
* 通用工具类
* @author Mark
*/
public class CommonUtil {
private static Logger log = LoggerFactory.getLogger(CommonUtil.class);
/**
* 发送https请求
* @param requestUrl 请求地址
* @param requestMethod 请求方式（GET、POST）
* @param outputStr 提交的数据
* @return 返回微信服务器响应的信息
*/
public static String httpsRequest(String requestUrl, String requestMethod, String outputStr) {
try {
// 创建SSLContext对象，并使用我们指定的信任管理器初始化
TrustManager[] tm = { new MyX509TrustManager() };
SSLContext sslContext = SSLContext.getInstance(“SSL”, “SunJSSE”);
sslContext.init(null, tm, new java.security.SecureRandom());
// 从上述SSLContext对象中得到SSLSocketFactory对象
SSLSocketFactory ssf = sslContext.getSocketFactory();
URL url = new URL(requestUrl);
HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
conn.setSSLSocketFactory(ssf);
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setUseCaches(false);
// 设置请求方式（GET/POST）
conn.setRequestMethod(requestMethod);
conn.setRequestProperty(“content-type”, “application/x-www-form-urlencoded”);
// 当outputStr不为null时向输出流写数据
if (null != outputStr) {
OutputStream outputStream = conn.getOutputStream();
// 注意编码格式
outputStream.write(outputStr.getBytes(“UTF-8”));
outputStream.close();
}
// 从输入流读取返回内容
InputStream inputStream = conn.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);
}
// 释放资源
bufferedReader.close();
inputStreamReader.close();
inputStream.close();
inputStream = null;
conn.disconnect();
return buffer.toString();
} catch (ConnectException ce) {
log.error(“连接超时：{}”, ce);
} catch (Exception e) {
log.error(“https请求异常：{}”, e);
}
return null;
}

public static String urlEncodeUTF8(String source){    String result = source;    try {        result = java.net.URLEncoder.encode(source,"utf-8");    } catch (UnsupportedEncodingException e) {        e.printStackTrace();    }    return result;}

}
第三步：MD5处理 MD5Util
/**
* MD5处理
* @author Mark
*
*/
public class MD5Util {

private static String byteArrayToHexString(byte b[]) {    StringBuffer resultSb = new StringBuffer();    for (int i = 0; i < b.length; i++)        resultSb.append(byteToHexString(b[i]));    return resultSb.toString();}private static String byteToHexString(byte b) {    int n = b;    if (n < 0)        n += 256;    int d1 = n / 16;    int d2 = n % 16;    return hexDigits[d1] + hexDigits[d2];}public static String MD5Encode(String origin, String charsetname) {    String resultString = null;    try {        resultString = new String(origin);        MessageDigest md = MessageDigest.getInstance("MD5");        if (charsetname == null || "".equals(charsetname))            resultString = byteArrayToHexString(md.digest(resultString                    .getBytes()));        else            resultString = byteArrayToHexString(md.digest(resultString                    .getBytes(charsetname)));    } catch (Exception exception) {    }    return resultString;}private static final String hexDigits[] = { "0", "1", "2", "3", "4", "5",        "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };

}
第四步：信任管理器微信的信任证书 MyX509TrustManager
/**
* 信任管理器
* @author Mark
*/
public class MyX509TrustManager implements X509TrustManager {

// 检查客户端证书public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {}// 检查服务器端证书public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {}// 返回受信任的X509证书数组public X509Certificate[] getAcceptedIssuers() {    return null;}

}
第五步：微信H5支付签名随机码时间戳等管理 PayCommonUtil
/**
* 微信H5支付签名随机码时间戳等管理
* @author Mark
*
*/

public class PayCommonUtil {

/** * 获取支付随机码 * @return */ public static String create_nonce_str() {        return UUID.randomUUID().toString();    }   /**    * 获取微信支付时间戳    * @return    */    public static String create_timestamp() {        return Long.toString(System.currentTimeMillis() / 1000);    }    /**     * 获取预支付ID时  获取随机码     * @param length     * @return     */    public static String CreateNoncestr(int length) {        String chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";        String res = "";        for (int i = 0; i < length; i++) {            Random rd = new Random();            res += chars.indexOf(rd.nextInt(chars.length() - 1));        }        return res;    }    /**     * 获取预支付ID时  获取随机码     * @param length     * @return     */    public static String CreateNoncestr() {        String chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";        String res = "";        for (int i = 0; i < 16; i++) {            Random rd = new Random();            res += chars.charAt(rd.nextInt(chars.length() - 1));        }        return res;    }/** * @author Mark * @Description：sign签名 * @param characterEncoding 编码格式 * @param parameters 请求参数 * @return */public static String createSign(SortedMap<Object,Object> parameters){    StringBuffer sb = new StringBuffer();    Set es = parameters.entrySet();    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=" + ConfigUtil.API_KEY);    String sign = MD5Util.MD5Encode(sb.toString(),"UTF-8").toUpperCase();    return sign;}/** * @author Mark * @Description：将请求参数转换为xml格式的string * @param parameters  请求参数 * @return */public static String getRequestXml(SortedMap<Object,Object> parameters){    StringBuffer sb = new StringBuffer();    sb.append("<xml>");    Set es = parameters.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 ("attach".equalsIgnoreCase(k)||"body".equalsIgnoreCase(k)||"sign".equalsIgnoreCase(k)) {            sb.append("<"+k+">"+"<![CDATA["+v+"]]></"+k+">");        }else {            sb.append("<"+k+">"+v+"</"+k+">");        }    }    sb.append("</xml>");    return sb.toString();}/** * @author Mark * @Description：返回给微信的参数 * @param return_code 返回编码 * @param return_msg  返回信息 * @return */public static String setXML(String return_code, String return_msg) {    return "<xml><return_code><![CDATA[" + return_code            + "]]></return_code><return_msg><![CDATA[" + return_msg            + "]]></return_msg></xml>";}

}
第六步：调用微信H5支付统一下单接口得到预支付ID WxPayUtil
/**
* 调用微信H5支付统一下单接口得到预支付ID
* @author Mark
*
*/

public class WxPayUtil {

@SuppressWarnings("unchecked")public static String unifiedorder(String body,String out_trade_no,String openid) {    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("body", body);    parameters.put("out_trade_no", out_trade_no);    parameters.put("total_fee", "1");    parameters.put("spbill_create_ip","113.57.246.11");    parameters.put("notify_url", ConfigUtil.NOTIFY_URL);    parameters.put("trade_type", "JSAPI");    parameters.put("openid", openid);    String sign = PayCommonUtil.createSign(parameters);    parameters.put("sign", sign);    String requestXML = PayCommonUtil.getRequestXml(parameters);    System.out.println(requestXML.toString());    String result =CommonUtil.httpsRequest(ConfigUtil.UNIFIED_ORDER_URL, "POST", requestXML);    System.out.println(result.toString());    Map<String, String> map=new HashMap<String, String>();    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();    }//解析微信返回的信息，以Map形式存储便于取值    return map.get("prepay_id").toString();}

}
第七步：xml管理 XMLUtil
/**
* xml管理
* @author Mark
*
*/
public class XMLUtil {
/**
* 解析xml,返回第一级元素键值对。如果第一级元素有子节点，则此节点的值是子节点的xml数据。
* @param strxml
* @return
* @throws JDOMException
* @throws IOException
*/
public static Map doXMLParse(String strxml) throws JDOMException, IOException {
strxml = strxml.replaceFirst(“encoding=\”.*\”“, “encoding=\”UTF-8\”“);

    if(null == strxml || "".equals(strxml)) {        return null;    }    Map m = new HashMap();    InputStream in = new ByteArrayInputStream(strxml.getBytes("UTF-8"));    SAXBuilder builder = new SAXBuilder();    Document doc = builder.build(in);    Element root = doc.getRootElement();    List list = root.getChildren();    Iterator it = list.iterator();    while(it.hasNext()) {        Element e = (Element) it.next();        String k = e.getName();        String v = "";        List children = e.getChildren();        if(children.isEmpty()) {            v = e.getTextNormalize();        } else {            v = XMLUtil.getChildrenText(children);        }        m.put(k, v);    }    //关闭流    in.close();    return m;}/** * 获取子结点的xml * @param children * @return String */public static String getChildrenText(List children) {    StringBuffer sb = new StringBuffer();    if(!children.isEmpty()) {        Iterator it = children.iterator();        while(it.hasNext()) {            Element e = (Element) it.next();            String name = e.getName();            String value = e.getTextNormalize();            List list = e.getChildren();            sb.append("<" + name + ">");            if(!list.isEmpty()) {                sb.append(XMLUtil.getChildrenText(list));            }            sb.append(value);            sb.append("</" + name + ">");        }    }    return sb.toString();}

}
第八步：接下来是Controller中调用，方式如下：
@ApiOperation(value = “微信支付调用”, httpMethod = “POST”)
@RequestMapping(“/couponsConfirm”)
public String couponsConfirm(Model m,@RequestParam(“openid”)String openid,@RequestParam(“orderNo”)String orderNo) {
//openid可通过微信高级接口oath2.0网页授权接口获取到用户信息,此接口本文中就不提供了，如果有需要，请留言。
m.addAttribute(“openid”, openid);
//orderNo是你的商品订单号，自行生成的随机订单号，但是要保证随机性，不能有重复订单号。
m.addAttribute(“orderNo”, orderNo);

    String timeStamp=PayCommonUtil.create_timestamp();    String nonceStr=PayCommonUtil.create_nonce_str();    m.addAttribute("appid", ConfigUtil.APPID);    m.addAttribute("timestamp", timeStamp);    m.addAttribute("nonceStr", nonceStr);    m.addAttribute("openid",openid);    String prepayId=WxPayUtil.unifiedorder("外卖下单",orderNo, openid);

// String userAgent = request.getHeader(“user-agent”);
// char agent = userAgent.charAt(userAgent.indexOf(“MicroMessenger”)+15);
// m.addAttribute(“agent”, new String(new char[]{agent}));//微信版本号，用于前面提到的判断用户手机微信的版本是否是5.0以上版本。

    SortedMap<Object,Object> signParams = new TreeMap<Object,Object>();      signParams.put("appId", ConfigUtil.APPID);      signParams.put("nonceStr",nonceStr);      signParams.put("package", "prepay_id="+prepayId);      signParams.put("timeStamp", timeStamp);      signParams.put("signType", "MD5");      // 生成支付签名，要采用URLENCODER的原始值进行SHA1算法！      String sign= PayCommonUtil.createSign(signParams);    m.addAttribute("paySign", sign);    m.addAttribute("packageValue", "prepay_id="+prepayId);    return "跳转到你的支付页面";}

最后一步：页面调用
WeixinJSBridge.invoke(‘getBrandWCPayRequest’,{
“appId”:(“#appid”).val(),
                            “timeStamp”:(“#timestamp”).val(),
“nonceStr”:(“#nonceStr”).val(),
                            “package”:(“#packageValue”).val(),
“signType”:”MD5”,
“paySign”:$(“#paySign”).val()
},function(res){
WeixinJSBridge.log(res.err_msg);
if(res.err_msg == “get_brand_wcpay_request:ok”){
alert(“支付成功”)；
}else if(res.err_msg == “get_brand_wcpay_request:cancel”){
alert(“取消支付！”)

    }else{           alert("支付失败！")    }

到此，所有需要的代码都已提供，各位在借鉴的时候，记得也要做些内容修改，ConfigUtil中的一些参数，需要各位自行提供。其它的都可以直接使用，微信支付整体并不难，难点就在于微信签名，很多人调试微信支付，都被这个微信签名给难倒了，这也是微信团队的留下的一天坑。

出处：http://blog.csdn.net/kiss_mark/article/details/52671494

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