JAVA微信小程序支付以及提现（企业向用户支付）
JAVA微信小程序支付以及提现（企业向用户支付）工具类等都给全了
支付
微信官方文档
https://pay.weixin.qq.com/wiki/doc/api/wxa/wxa_sl_api.php?chapter=7_7&index=5
开发前准备好
1.appId
2.密钥(小程序配置界面)
3.商户号
4.api密钥(商家后台自己设置)
依赖pom.xml
<!-- json转换 -->
<!-- https://mvnrepository.com/artifact/com.alibaba/fastjson -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.58</version>
</dependency>
<dependency>
<groupId>org.jdom</groupId>
<artifactId>jdom</artifactId>
<version>2.0.2</version>
</dependency>
<dependency>
<groupId>org.apache.maven.surefire</groupId>
<artifactId>maven-surefire-common</artifactId>
<version>2.22.2</version>
</dependency>
<dependency>
<groupId>org.codehaus.jettison</groupId>
<artifactId>jettison</artifactId>
<version>1.1</version>
</dependency>
<dependency>
<groupId>net.sf.json-lib</groupId>
<artifactId>json-lib</artifactId>
<version>2.4</version>
<classifier>jdk15</classifier>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.3</version>
</dependency>
<dependency>
<groupId>org.jdom</groupId>
<artifactId>jdom</artifactId>
<version>1.1</version>
</dependency>
控制层Controller
/**
* 获取微信支付签名
* 作者wx1023732997
*/
@RequestMapping(value = "/payment", method = {RequestMethod.GET, RequestMethod.POST})
@ResponseBody
public SortedMap<Object, Object> WapSignSignatureAction(HttpServletRequest request, String code, String total_fee, String orderno,
String tName, HttpServletResponse response) throws Exception {
SortedMap<Object, Object> parameters = new TreeMap<Object, Object>();
// code作为换取access_token的票据，每次用户授权带上的code将不一样，code只能使用一次，5分钟未被使用自动过期。
// 通过code换取网页授权access_token
String grant_type = "authorization_code";
//////////////// 1、向微信服务器 使用登录凭证 code 获取 session_key 和 openid ////////////////
//请求参数
String params = "appid=" + APPID + "&secret=" + AppSecret + "&js_code=" + code + "&grant_type=" + grant_type;
//发送请求
String sr = HttpRequest.sendGet("https://api.weixin.qq.com/sns/jscode2session", params);
//解析相应内容（转换成json对象）
JSONObject json = JSONObject.parseObject(sr);
//获取会话密钥（session_key）
String session_key = json.get("session_key").toString();
//用户的唯一标识（openid）
String openid = (String) json.get("openid");
String nonce_str = create_nonce_str();
String timestamp = create_timestamp();
// 获取prepayId
try {
String result = getPrepayId(request, tName, orderno, total_fee, openid);
Map<String, String> map = doXMLParse(result);
// 重新生成签名
parameters.put("appId", APPID);
parameters.put("timeStamp", timestamp);
parameters.put("nonceStr", nonce_str);
parameters.put("package", "prepay_id=" + map.get("prepay_id"));
parameters.put("signType", "MD5");
String sign = createSign("UTF-8", parameters);
parameters.put("prepay_id", "prepay_id=" + map.get("prepay_id"));
parameters.put("paySign", sign);
} catch (Exception e) {
e.printStackTrace();
}
return parameters;
}
Service层
public class PaymentService {
public static final String APPID = "****"; //服务号APPID
public static final String AppSecret = "****"; //服务号AppSecret
public static final String MCH_ID = "*****"; //支付商户号
public static final String API_KEY = "*******"; //API密钥
/**
* 发起https请求并获取结果
*
* @param requestUrl 请求地址
* @param requestMethod 请求方式（GET、POST）
* @param outputStr 提交的数据
* @return JSONObject(通过JSONObject.get ( key)的方式获取json对象的属性值)
*/
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 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.fromObject(buffer.toString());
} catch (ConnectException ce) {
System.err.println("Weixin server connection timed out.");
} catch (Exception e) {
System.err.println("https request error");
}
return jsonObject;
}
public static String getPrepayId(HttpServletRequest request, String name, String orderno, String total_fee, String openid) throws Exception {
SortedMap<Object, Object> parameters = new TreeMap<Object, Object>();
parameters.put("appid", APPID);
parameters.put("mch_id", MCH_ID);
parameters.put("nonce_str", CreateNoncestr());
parameters.put("body", name);
parameters.put("out_trade_no", orderno);// 订单号
parameters.put("total_fee", total_fee);// 支付金额单位：分
parameters.put("spbill_create_ip", getIp2(request));
parameters.put("notify_url", "支付成功回调地址");
parameters.put("trade_type", "JSAPI");
parameters.put("openid", openid);//openid :需填写
parameters.put("time_expire", "");// 交易结束时间,需要动态传入,格式为yyyyMMddHHmmss
String sign = createSign("UTF-8", parameters);
parameters.put("sign", sign);
String requestXML = getRequestXml(parameters);
//调用统一下单接口
String result = httpsRequest("https://api.mch.weixin.qq.com/pay/unifiedorder", "POST", requestXML);
System.out.println(result);
return result;
}
public static String getPrepayno(HttpServletRequest request, String partner_trade_no, String amount, String openid,
String check_name, String re_user_name, String desc) throws Exception {
SortedMap<Object, Object> parameters = new TreeMap<Object, Object>();
parameters.put("mch_appid", APPID);
parameters.put("mchid", MCH_ID);
parameters.put("nonce_str", CreateNoncestr());
parameters.put("partner_trade_no", partner_trade_no);// 订单号
parameters.put("amount", amount);// 支付金额单位：分
parameters.put("spbill_create_ip", getIp2(request));
parameters.put("notify_url", "支付成功回调地址");
parameters.put("trade_type", "JSAPI");
parameters.put("openid", openid);//openid :需填写
parameters.put("check_name", check_name);
parameters.put("re_user_name", re_user_name);
parameters.put("desc", desc);
parameters.put("time_expire", "");// 交易结束时间,需要动态传入,格式为yyyyMMddHHmmss
String sign = createSign("UTF-8", parameters);
parameters.put("sign", sign);
String requestXML = getRequestXml(parameters);
//调用统一下单接口
String result = httpsRequest("https://api.mch.weixin.qq.com/mmpaymkttransfers/promotion/transfers", "POST", requestXML);
System.out.println(result);
return result;
}
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;
}
public static String getIp2(HttpServletRequest request) {
String ip = request.getHeader("X-Forwarded-For");
if (!StringUtils.isEmpty(ip) && !"unKnown".equalsIgnoreCase(ip)) {
// 多次反向代理后会有多个ip值，第一个ip才是真实ip
int index = ip.indexOf(",");
if (index != -1) {
return ip.substring(0, index);
} else {
return ip;
}
}
ip = request.getHeader("X-Real-IP");
if (!StringUtils.isEmpty(ip) && !"unKnown".equalsIgnoreCase(ip)) {
return ip;
}
return request.getRemoteAddr();
}
@SuppressWarnings("rawtypes")
public static String createSign(String characterEncoding, 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=" + API_KEY);
String sign = MD5Encode(sb.toString(), characterEncoding).toUpperCase();
return sign;
}
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 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];
}
private static final String hexDigits[] = {"0", "1", "2", "3", "4", "5",
"6", "7", "8", "9", "a", "b", "c", "d", "e", "f"};
@SuppressWarnings("rawtypes")
public static String getRequestXml(SortedMap<Object, Object> parameters) {
StringBuffer sb = new StringBuffer();
sb.append("" );
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 + ">" + " + v + "]]> + k + ">");
} else {
sb.append("<" + k + ">" + v + " + k + ">");
}
}
sb.append("");
return sb.toString();
}
/**
* 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 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) {
System.out.println("连接超时");
} catch (Exception e) {
System.out.println("请求异常");
}
return null;
}
public static String create_nonce_str() {
return UUID.randomUUID().toString();
}
public static String create_timestamp() {
return Long.toString(System.currentTimeMillis() / 1000);
}
/**
* 解析xml
*/
public static Map doXMLParse(String strxml) throws Exception {
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 = getChildrenText(children);
}
m.put(k, v);
}
// 关闭流
in.close();
return m;
}
/**
* 获取子结点的xml
*/
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(getChildrenText(list));
}
sb.append(value);
sb.append(" + name + ">");
}
}
return sb.toString();
}
}
X509TrustManager类
package cn.shifen.utils;
import javax.net.ssl.X509TrustManager;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
public class MyX509TrustManager implements X509TrustManager {
public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
}
public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
}
public X509Certificate[] getAcceptedIssuers() {
return null;
}
}
HttpRequest类
package cn.shifen.utils;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;
public class HttpRequest {
/**
* 向指定URL发送GET方法的请求
*
* @param url 发送请求的URL
* @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
* @return URL 所代表远程资源的响应结果
*/
public static String sendGet(String url, String param) {
String result = "";
BufferedReader in = null;
try {
String urlNameString = url + "?" + param;
URL realUrl = new URL(urlNameString);
// 打开和URL之间的连接
URLConnection connection = realUrl.openConnection();
// 设置通用的请求属性
connection.setRequestProperty("accept", "*/*");
connection.setRequestProperty("connection", "Keep-Alive");
connection.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 建立实际的连接
connection.connect();
// 获取所有响应头字段
Map<String, List<String>> map = connection.getHeaderFields();
// 遍历所有的响应头字段
for (String key : map.keySet()) {
System.out.println(key + "--->" + map.get(key));
}
// 定义 BufferedReader输入流来读取URL的响应
in = new BufferedReader(new InputStreamReader(
connection.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
System.out.println("发送GET请求出现异常！" + e);
e.printStackTrace();
}
// 使用finally块来关闭输入流
finally {
try {
if (in != null) {
in.close();
}
} catch (Exception e2) {
e2.printStackTrace();
}
}
return result;
}
/**
* 向指定 URL 发送POST方法的请求
*
* @param url 发送请求的 URL
* @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
* @return 所代表远程资源的响应结果
*/
public static String sendPost(String url, String param) {
PrintWriter out = null;
BufferedReader in = null;
String result = "";
try {
URL realUrl = new URL(url);
// 打开和URL之间的连接
URLConnection conn = realUrl.openConnection();
// 设置通用的请求属性
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive");
conn.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 发送POST请求必须设置如下两行
conn.setDoOutput(true);
conn.setDoInput(true);
// 获取URLConnection对象对应的输出流
out = new PrintWriter(conn.getOutputStream());
// 发送请求参数
out.print(param);
// flush输出流的缓冲
out.flush();
// 定义BufferedReader输入流来读取URL的响应
in = new BufferedReader(
new InputStreamReader(conn.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
System.out.println("发送 POST 请求出现异常！" + e);
e.printStackTrace();
}
//使用finally块来关闭输出流、输入流
finally {
try {
if (out != null) {
out.close();
}
if (in != null) {
in.close();
}
} catch (IOException ex) {
ex.printStackTrace();
}
}
return result;
}
}
MD5Util类
package cn.shifen.utils;
import java.security.MessageDigest;
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"};
}
提现
官方文档地址
https://pay.weixin.qq.com/wiki/doc/api/tools/mch_pay.php?chapter=14_2
小程序提现需要下载证书
下载证书指南
https://kf.qq.com/faq/161222NneAJf161222U7fARv.html
控制层
//提现到零钱
//https://pay.weixin.qq.com/wiki/doc/api/tools/mch_pay.php?chapter=14_2
@RequestMapping("/transfer")
@ResponseBody
public SortedMap<Object, Object> transfer(HttpServletRequest request, HttpServletResponse response) {
String openid = request.getParameter("openid");
String amount = request.getParameter("amount");
String tk_order_id = CommonUtils.getId();//只要数字或字母的不重复32位即可，建议uuid去_
System.out.println(" == >> " + tk_order_id);
String partner_trade_no = tk_order_id; //商户订单号
String check_name = "NO_CHECK"; //校验用户姓名选项 (NO_CHECK：不校验真实姓名 FORCE_CHECK：强校验真实姓名)
String re_user_name = "xxx"; //收款用户姓名
String desc = "xxx"; //企业付款备注
SortedMap<Object, Object> parameters = new TreeMap<>();
try {
String result = getPrepayno(request, partner_trade_no, amount, openid, check_name, re_user_name, desc);
Map<String, String> map = doXMLParse(result);
parameters.put("appId", APPID);
parameters.put("package", "prepay_id=" + map.get("prepay_id"));
parameters.put("signType", "MD5");
parameters.put("prepay_id", "prepay_id=" + map.get("prepay_id"));
String sign = createSign("UTF-8", parameters);
parameters.put("paySign", sign);
} catch (Exception e) {
e.printStackTrace();
}
return parameters;
}
提现的service已经在支付的service里
请求参数，多看官方文档
