java微信接入
1.前提有微信服务号,会获得 AppID 和 AppSecret ,然后配置请求链接,这个配置主要获得openid之类的
2.然后要拥有微信商户账号,会获得 商户号 和 API密钥 , 主要用于支付验证
3.有了这些账号,我就直接记录代码了,简易html调用支付
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<script src="jquery-1.11.1.min.js"></script>
<script type="text/javascript">
$(function(){
wxPay();
})
var result = {};
var appId = result.appId;
var timeStamp = result.timeStamp;
var nonceStr = result.nonceStr;
var package = result.package;
var signType = result.signType;
var paySign = result.paySign;
function getQueryVariable(variable)
{
var query = window.location.search.substring(1);
var vars = query.split("&");
for (var i=0;i<vars.length;i++) {
var pair = vars[i].split("=");
if(pair[0] == variable){return pair[1];}
}
return(false);
}
function wxPay(){
var code = getQueryVariable("code");
var data = {
code:code,
out_trade_no:"4548748484"
};
if(code){
alert("code="+code);
$.ajax({
url:"http://www.vip448.cn/kym-web-cat/wxpay/unifiedorder",
type: "post",
data:JSON.stringify(data),
contentType: "application/json",
dataType: "json",
async: true,
success: function(returnData){
alert("appId:"+returnData.appId);
alert("timeStamp:"+returnData.timeStamp);
alert("nonceStr:"+returnData.nonceStr);
alert("package:"+returnData.package);
alert("signType:"+returnData.signType);
alert("paySign:"+returnData.paySign);
appId = returnData.appId;
timeStamp = returnData.timeStamp;
nonceStr = returnData.nonceStr;
package = returnData.package;
signType = returnData.signType;
paySign = returnData.paySign;
if (typeof WeixinJSBridge == "undefined") {
if (document.addEventListener) {
document.addEventListener('WeixinJSBridgeReady',
onBridgeReady, false);
} else if (document.attachEvent) {
document.attachEvent('WeixinJSBridgeReady',
onBridgeReady);
document.attachEvent('onWeixinJSBridgeReady',
onBridgeReady);
}
} else {
alert(1);
onBridgeReady();
}
}
});
} else {
alert("服务器错误");
}
}
function onBridgeReady(){
WeixinJSBridge.invoke( 'getBrandWCPayRequest', {
"appId":appId, //公众号名称,由商户传入
"timeStamp":timeStamp, //时间戳,自1970年以来的秒数
"nonceStr":nonceStr, //随机串
"package":package,
"signType":signType, //微信签名方式：
"paySign":paySign //微信签名
},
function(res){
if(res.err_msg == "get_brand_wcpay_request:ok" ) {
alert('支付成功');
//支付成功后跳转的页面
}else if(res.err_msg == "get_brand_wcpay_request:cancel"){
alert('支付取消');
}else if(res.err_msg == "get_brand_wcpay_request:fail"){
alert(JSON.stringify(res));
alert('支付失败');
WeixinJSBridge.call('closeWindow');
} //使用以上方式判断前端返回,微信团队郑重提示：res.err_msg将在用户支付成功后返回ok,但并不保证它绝对可靠。
});
}
</script>
<body>
</body>
</html>
4,controller入口
@RequestMapping("wxpay")
@Controller
public class WechatPayController {
/**
* @Description 微信浏览器内微信支付/公众号支付(JSAPI)
* @param request
* @param code
* @return Map
*/
@RequestMapping(value="unifiedorder", method = RequestMethod.POST)
@ResponseBody
public Map<String,String> unifiedorder(HttpServletRequest request,@RequestBody TempFormMap tempDto) {
try {
String out_trade_no = tempDto.getStr("out_trade_no");
String code = tempDto.getStr("code");
String openId = WechatUtil.getOpenId(code);
System.out.println("openId : " + openId);
//拼接统一下单地址参数
Map<String, String> paraMap = new HashMap<String, String>();
//获取请求ip地址
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.getRemoteAddr();
}
if(ip.indexOf(",")!=-1){
String[] ips = ip.split(",");
ip = ips[0].trim();
}
paraMap.put("appid", WXPayConfigOwn.APPID);
paraMap.put("mch_id", WXPayConfigOwn.MCHID);
paraMap.put("body", "好试多订单");
paraMap.put("nonce_str", WXPayUtil.generateNonceStr());
paraMap.put("openid", openId);
paraMap.put("out_trade_no", out_trade_no);//订单号
paraMap.put("spbill_create_ip", ip);
paraMap.put("total_fee","1");
paraMap.put("trade_type", "JSAPI");
paraMap.put("notify_url",WXPayConfigOwn.NOTIFY_URL);// 此路径是微信服务器调用支付结果通知路径随意写
String sign = WXPayUtil.generateSignature(paraMap, WXPayConfigOwn.SECKEY);
paraMap.put("sign", sign);
System.out.println("paraMap : " + paraMap);
String xml = WXPayUtil.mapToXml(paraMap);//将所有参数(map)转xml格式
// 统一下单 https://api.mch.weixin.qq.com/pay/unifiedorder
String unifiedorder_url = "https://api.mch.weixin.qq.com/pay/unifiedorder";
String xmlStr = HttpRequest.sendPost(unifiedorder_url, xml);//发送post请求"统一下单接口"返回预支付id:prepay_id
System.out.println("xmlStr : " + xmlStr);
//以下内容是返回前端页面的json数据
String prepay_id = "";//预支付id
if (xmlStr.indexOf("SUCCESS") != -1) {
Map<String, String> map = WXPayUtil.xmlToMap(xmlStr);
prepay_id = (String) map.get("prepay_id");
}
Map<String, String> payMap = new HashMap<String, String>();
payMap.put("appId", WXPayConfigOwn.APPID);
payMap.put("timeStamp", WXPayUtil.getCurrentTimestamp()+"");
payMap.put("nonceStr", WXPayUtil.generateNonceStr());
payMap.put("signType", "MD5");
payMap.put("package", "prepay_id=" + prepay_id);
String paySign = WXPayUtil.generateSignature(payMap, WXPayConfigOwn.SECKEY);
payMap.put("paySign", paySign);
System.out.println("payMap : " + payMap);
return payMap;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
@RequestMapping("payCallback")
public String callBack(HttpServletRequest request,HttpServletResponse response){
System.out.println("微信支付成功,微信发送的callback信息,请注意修改订单信息");
InputStream is = null;
try {
is = request.getInputStream();//获取请求的流信息(这里是微信发的xml格式所有只能使用流来读)
String xml = WXPayUtil.inputStream2String(is, "UTF-8");
Map<String, String> notifyMap = WXPayUtil.xmlToMap(xml);//将微信发的xml转map
if(notifyMap.get("return_code").equals("SUCCESS")){
if(notifyMap.get("result_code").equals("SUCCESS")){
String ordersSn = notifyMap.get("out_trade_no");//商户订单号
String amountpaid = notifyMap.get("total_fee");//实际支付的订单金额:单位 分
BigDecimal amountPay = (new BigDecimal(amountpaid).divide(new BigDecimal("100"))).setScale(2);//将分转换成元-实际支付金额:元
//String openid = notifyMap.get("openid"); //如果有需要可以获取
//String trade_type = notifyMap.get("trade_type");
System.out.println("支付成功,回调:"+ordersSn+":"+amountPay);
/*以下是自己的业务处理------仅做参考
* 更新order对应字段/已支付金额/状态码
*/
}
}
//告诉微信服务器收到信息了，不要在调用回调action了========这里很重要回复微信服务器信息用流发送一个xml即可
response.getWriter().write("<xml><return_code><![CDATA[SUCCESS]]></return_code></xml>");
is.close();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
4.WeChatUtil 这个用来获取openid
/**
* @ClassName: WeChatUtil
* @Description:微信工具类
* @author: zhenglei
* @date: 2018年12月24日 下午3:54:10
*/
public class WechatUtil {
/**
* @Title: getUserAccessToken
* @Description: 获得用户微信 AccessToken
* @param code
* @return { "access_token":"ACCESS_TOKEN",
"expires_in":7200,
"refresh_token":"REFRESH_TOKEN",
"openid":"OPENID",
"scope":"SCOPE" }
* @author: zhenglei
* @date: 2018年12月20日 下午3:24:02
*/
public static String getOpenId(String code) {
String requestUrl = WXPayConfigOwn.GET_USER_ACCESSTOKEN_URL.replace("APPID" , WXPayConfigOwn.APPID).replace("SECRET" , WXPayConfigOwn.SECRET).replace("CODE", code);
JSONObject jsonObject = httpRequest(requestUrl , "POST" , null);
String openid = StringUtils.EMPTY;
// 如果请求成功
if (null != jsonObject) {
try {
openid = jsonObject.getString("openid");
} catch (Exception e) {
// 获取token失败
System.out.println("获取token失败 errcode:{} errmsg:{}");
}
}
return openid;
}
public static JSONObject httpRequest(String requestUrl , String requestMethod , String outputStr) {
JSONObject jsonObject = null;
StringBuffer buffer = new StringBuffer();
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 httpUrlConn = (HttpsURLConnection) url.openConnection();
httpUrlConn.setSSLSocketFactory(ssf);
httpUrlConn.setDoOutput(true);
httpUrlConn.setDoInput(true);
httpUrlConn.setUseCaches(false);
// 设置请求方式（GET/POST）
httpUrlConn.setRequestMethod(requestMethod);
if ("GET".equalsIgnoreCase(requestMethod)) httpUrlConn.connect();
// 当有数据需要提交时
if (null != outputStr) {
OutputStream outputStream = httpUrlConn.getOutputStream();
// 注意编码格式，防止中文乱码
outputStream.write(outputStr.getBytes("UTF-8"));
outputStream.close();
}
// 将返回的输入流转换成字符串
InputStream inputStream = httpUrlConn.getInputStream();
InputStreamReader inputStreamReader = new InputStreamReader(inputStream , "utf-8");
BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
String str = null;
while ((str = bufferedReader.readLine()) != null) {
buffer.append(str);
}
bufferedReader.close();
inputStreamReader.close();
// 释放资源
inputStream.close();
inputStream = null;
httpUrlConn.disconnect();
jsonObject = JSONObject.parseObject(buffer.toString());
return jsonObject;
} catch (ConnectException ce) {
System.out.println("Weixin server connection timed out.");
} catch (Exception e) {
System.out.println("error.");
}
return jsonObject;
}
}
5.微信参数配置文件
public class WXPayConfigOwn {
//App ID
public static String APPID = "";
public static String SECRET = "";
//商户号
public static String MCHID = "";
//API密钥
public static String SECKEY = "";
//回调地址
public static String NOTIFY_URL = "";
/**
* 获取用户ACCESS_TOKEN接口
*/
public static String GET_USER_ACCESSTOKEN_URL = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=APPID&secret=SECRET&code=CODE&grant_type=authorization_code";
}
6.WXPayUtil 这个是微信官方api
public class WXPayUtil {
private static final String SYMBOLS = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
private static final Random RANDOM = new SecureRandom();
/**
* XML格式字符串转换为Map
*
* @param strXML XML字符串
* @return XML数据转换后的Map
* @throws Exception
*/
public static Map<String, String> xmlToMap(String strXML) throws Exception {
try {
Map<String, String> data = new HashMap<String, String>();
DocumentBuilder documentBuilder = WXPayXmlUtil.newDocumentBuilder();
InputStream stream = new ByteArrayInputStream(strXML.getBytes("UTF-8"));
org.w3c.dom.Document doc = documentBuilder.parse(stream);
doc.getDocumentElement().normalize();
NodeList nodeList = doc.getDocumentElement().getChildNodes();
for (int idx = 0; idx < nodeList.getLength(); ++idx) {
Node node = nodeList.item(idx);
if (node.getNodeType() == Node.ELEMENT_NODE) {
org.w3c.dom.Element element = (org.w3c.dom.Element) node;
data.put(element.getNodeName(), element.getTextContent());
}
}
try {
stream.close();
} catch (Exception ex) {
// do nothing
}
return data;
} catch (Exception ex) {
WXPayUtil.getLogger().warn("Invalid XML, can not convert to map. Error message: {}. XML content: {}", ex.getMessage(), strXML);
throw ex;
}
}
/**
* 将Map转换为XML格式的字符串
*
* @param data Map类型数据
* @return XML格式的字符串
* @throws Exception
*/
public static String mapToXml(Map<String, String> data) throws Exception {
org.w3c.dom.Document document = WXPayXmlUtil.newDocument();
org.w3c.dom.Element root = document.createElement("xml");
document.appendChild(root);
for (String key: data.keySet()) {
String value = data.get(key);
if (value == null) {
value = "";
}
value = value.trim();
org.w3c.dom.Element filed = document.createElement(key);
filed.appendChild(document.createTextNode(value));
root.appendChild(filed);
}
TransformerFactory tf = TransformerFactory.newInstance();
Transformer transformer = tf.newTransformer();
DOMSource source = new DOMSource(document);
transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
StringWriter writer = new StringWriter();
StreamResult result = new StreamResult(writer);
transformer.transform(source, result);
String output = writer.getBuffer().toString(); //.replaceAll("\n|\r", "");
try {
writer.close();
}
catch (Exception ex) {
}
return output;
}
/**
* 生成带有 sign 的 XML 格式字符串
*
* @param data Map类型数据
* @param key API密钥
* @return 含有sign字段的XML
*/
public static String generateSignedXml(final Map<String, String> data, String key) throws Exception {
return generateSignedXml(data, key, SignType.MD5);
}
/**
* 生成带有 sign 的 XML 格式字符串
*
* @param data Map类型数据
* @param key API密钥
* @param signType 签名类型
* @return 含有sign字段的XML
*/
public static String generateSignedXml(final Map<String, String> data, String key, SignType signType) throws Exception {
String sign = generateSignature(data, key, signType);
data.put(WXPayConstants.FIELD_SIGN, sign);
return mapToXml(data);
}
/**
* 判断签名是否正确
*
* @param xmlStr XML格式数据
* @param key API密钥
* @return 签名是否正确
* @throws Exception
*/
public static boolean isSignatureValid(String xmlStr, String key) throws Exception {
Map<String, String> data = xmlToMap(xmlStr);
if (!data.containsKey(WXPayConstants.FIELD_SIGN) ) {
return false;
}
String sign = data.get(WXPayConstants.FIELD_SIGN);
return generateSignature(data, key).equals(sign);
}
/**
* 判断签名是否正确，必须包含sign字段，否则返回false。使用MD5签名。
*
* @param data Map类型数据
* @param key API密钥
* @return 签名是否正确
* @throws Exception
*/
public static boolean isSignatureValid(Map<String, String> data, String key) throws Exception {
return isSignatureValid(data, key, SignType.MD5);
}
/**
* 判断签名是否正确，必须包含sign字段，否则返回false。
*
* @param data Map类型数据
* @param key API密钥
* @param signType 签名方式
* @return 签名是否正确
* @throws Exception
*/
public static boolean isSignatureValid(Map<String, String> data, String key, SignType signType) throws Exception {
if (!data.containsKey(WXPayConstants.FIELD_SIGN) ) {
return false;
}
String sign = data.get(WXPayConstants.FIELD_SIGN);
return generateSignature(data, key, signType).equals(sign);
}
/**
* 生成签名
*
* @param data 待签名数据
* @param key API密钥
* @return 签名
*/
public static String generateSignature(final Map<String, String> data, String key) throws Exception {
return generateSignature(data, key, SignType.MD5);
}
/**
* 生成签名. 注意，若含有sign_type字段，必须和signType参数保持一致。
*
* @param data 待签名数据
* @param key API密钥
* @param signType 签名方式
* @return 签名
*/
public static String generateSignature(final Map<String, String> data, String key, SignType signType) throws Exception {
Set<String> keySet = data.keySet();
String[] keyArray = keySet.toArray(new String[keySet.size()]);
Arrays.sort(keyArray);
StringBuilder sb = new StringBuilder();
for (String k : keyArray) {
if (k.equals(WXPayConstants.FIELD_SIGN)) {
continue;
}
if (data.get(k).trim().length() > 0) // 参数值为空，则不参与签名
sb.append(k).append("=").append(data.get(k).trim()).append("&");
}
sb.append("key=").append(key);
if (SignType.MD5.equals(signType)) {
return MD5(sb.toString()).toUpperCase();
}
else if (SignType.HMACSHA256.equals(signType)) {
return HMACSHA256(sb.toString(), key);
}
else {
throw new Exception(String.format("Invalid sign_type: %s", signType));
}
}
/**
* 获取随机字符串 Nonce Str
*
* @return String 随机字符串
*/
public static String generateNonceStr() {
char[] nonceChars = new char[32];
for (int index = 0; index < nonceChars.length; ++index) {
nonceChars[index] = SYMBOLS.charAt(RANDOM.nextInt(SYMBOLS.length()));
}
return new String(nonceChars);
}
/**
* 生成 MD5
*
* @param data 待处理数据
* @return MD5结果
*/
public static String MD5(String data) throws Exception {
java.security.MessageDigest md = MessageDigest.getInstance("MD5");
byte[] array = md.digest(data.getBytes("UTF-8"));
StringBuilder sb = new StringBuilder();
for (byte item : array) {
sb.append(Integer.toHexString((item & 0xFF) | 0x100).substring(1, 3));
}
return sb.toString().toUpperCase();
}
/**
* 生成 HMACSHA256
* @param data 待处理数据
* @param key 密钥
* @return 加密结果
* @throws Exception
*/
public static String HMACSHA256(String data, String key) throws Exception {
Mac sha256_HMAC = Mac.getInstance("HmacSHA256");
SecretKeySpec secret_key = new SecretKeySpec(key.getBytes("UTF-8"), "HmacSHA256");
sha256_HMAC.init(secret_key);
byte[] array = sha256_HMAC.doFinal(data.getBytes("UTF-8"));
StringBuilder sb = new StringBuilder();
for (byte item : array) {
sb.append(Integer.toHexString((item & 0xFF) | 0x100).substring(1, 3));
}
return sb.toString().toUpperCase();
}
public static String inputStream2String(InputStream in,String decoder) {
InputStreamReader reader = null;
try {
reader = new InputStreamReader (in, decoder);
} catch (UnsupportedEncodingException e1) {
e1.printStackTrace();
}
BufferedReader br = new BufferedReader(reader);
StringBuilder sb = new StringBuilder();
String line = "";
try {
while ((line = br.readLine()) != null) {
sb.append(line);
}
} catch (IOException e) {
e.printStackTrace();
}
return sb.toString();
}
/**
* 日志
* @return
*/
public static Logger getLogger() {
Logger logger = LoggerFactory.getLogger("wxpay java sdk");
return logger;
}
/**
* 获取当前时间戳，单位秒
* @return
*/
public static long getCurrentTimestamp() {
return System.currentTimeMillis()/1000;
}
/**
* 获取当前时间戳，单位毫秒
* @return
*/
public static long getCurrentTimestampMs() {
return System.currentTimeMillis();
}
}
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