微信支付接口对接文档

建立子包demo,demo里面创建controller包、domain包、service包

目录结构：

controller包中创建Pay_controller

package com.ccunix.ihousekeeping.demo.controller;

import java.io.IOException;

import java.util.HashMap;

import java.util.Iterator;

import java.util.Map;

import java.util.Set;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.ResponseBody;

import com.ccunix.ihousekeeping.base.controller.BaseMultiController;

import com.ccunix.ihousekeeping.demo.domain.WxOa;

import com.ccunix.ihousekeeping.demo.service.UUID_Tools;

import com.ccunix.ihousekeeping.demo.service.WxSignUtil;

/**

* @ClassName: Pay_Controller

* @author xyp

* @date 2019年8月12日上午9:57:46

@Controller

@RequestMapping("Pay_Controller")

public class Pay_Controller extends BaseMultiController {

WxSignUtil wxSignUtil = new WxSignUtil();

// 微信预下单交易

@ResponseBody

@RequestMapping("/yuxiadan")

public Map yuxiadan() throws Exception {

WxOa wxOa = new WxOa();

// 应用ID

wxOa.setAppid("xxxxxxxxxxxxxx");

// 商户号

wxOa.setMch_id("xxxxxxxx");

// 随机字符串不长于32位

wxOa.setNonce_str(UUID_Tools.getUUID());

// 商品描述

wxOa.setBody("phone");

// 商户订单号

wxOa.setOut_trade_no("12345");

// 订单总金额，单位为分

wxOa.setTotal_fee(10);

// 终端IP

wxOa.setSpbill_create_ip("127.0.0.1");

// 通知地址

wxOa.setNotify_url(wxSignUtil.unifiedorderUrl);

// 交易类型 APP

wxOa.setTrade_type("NATIVE");

// 将数据放入map中

Map map = wxSignUtil.WxMd5Sign(wxOa, "9dffe0f7a65bb1976d4b33d7a8b1f7ac");

//转换为set集合

Set<Map.Entry<Integer, String>> entries = map.entrySet();

//迭代器进行遍历

Iterator<Map.Entry<Integer, String>> iteratorMap = entries.iterator();

while (iteratorMap.hasNext()) {

Map.Entry<Integer, String> next = iteratorMap.next();

System.err.println(next);

}

return map;

}

domain包中创建bean类：

WxOa类：

package com.ccunix.ihousekeeping.demo.domain;

import java.io.Serializable;

import java.util.Date;

//微信预下单参数

public class WxOa implements Serializable {

// 应用ID

private String appid;

// 商户号

private String mch_id;

// 设备号

private String device_info;

// 随机字符串不长于32位

private String nonce_str;

// 商品描述

private String body;

// 附加数据

private String attach;

// 商户订单号

private String out_trade_no;

// 订单总金额，单位为分

private int total_fee;

// 终端IP

private String spbill_create_ip;

// 交易起始时间

private Date time_start;

// 交易结束时间

private Date time_expire;

// 通知地址

private String notify_url;

// 交易类型 APP

private String trade_type;

// openid

private String openid;

//code_url

private String code_url;

public String getCode_url() {

return code_url;

}

public void setCode_url(String code_url) {

this.code_url = code_url;

}

public String getAppid() {

return appid;

}

public void setAppid(String appid) {

this.appid = appid;

}

public String getMch_id() {

return mch_id;

}

public void setMch_id(String mch_id) {

this.mch_id = mch_id;

}

public String getDevice_info() {

return device_info;

}

public void setDevice_info(String device_info) {

this.device_info = device_info;

}

public String getNonce_str() {

return nonce_str;

}

public void setNonce_str(String nonce_str) {

this.nonce_str = nonce_str;

}

public String getBody() {

return body;

}

public void setBody(String body) {

this.body = body;

}

public String getAttach() {

return attach;

}

public void setAttach(String attach) {

this.attach = attach;

}

public String getOut_trade_no() {

return out_trade_no;

}

public void setOut_trade_no(String out_trade_no) {

this.out_trade_no = out_trade_no;

}

public int getTotal_fee() {

return total_fee;

}

public void setTotal_fee(int total_fee) {

this.total_fee = total_fee;

}

public String getSpbill_create_ip() {

return spbill_create_ip;

}

public void setSpbill_create_ip(String spbill_create_ip) {

this.spbill_create_ip = spbill_create_ip;

}

public Date getTime_start() {

return time_start;

}

public void setTime_start(Date time_start) {

this.time_start = time_start;

}

public Date getTime_expire() {

return time_expire;

}

public void setTime_expire(Date time_expire) {

this.time_expire = time_expire;

}

public String getNotify_url() {

return notify_url;

}

public void setNotify_url(String notify_url) {

this.notify_url = notify_url;

}

public String getTrade_type() {

return trade_type;

}

public void setTrade_type(String trade_type) {

this.trade_type = trade_type;

}

public String getOpenid() {

return openid;

}

public void setOpenid(String openid) {

this.openid = openid;

}

WxPayOa类：

package com.ccunix.ihousekeeping.demo.domain;

import java.io.Serializable;

public class WxPayOa implements Serializable {

// 应用ID

private String appid;

// 随机字符串

private String noncestr;

// 扩展字段

private String packageace;

// 商户号

private String partnerid;

// 预支付交易会话ID

private String prepayid;

// 时间戳

private String timestamp;

public String getAppid() {

return appid;

}

public void setAppid(String appid) {

this.appid = appid;

}

public String getNoncestr() {

return noncestr;

}

public void setNoncestr(String noncestr) {

this.noncestr = noncestr;

}

public String getPackageace() {

return packageace;

}

public void setPackageace(String packageace) {

this.packageace = packageace;

}

public String getPartnerid() {

return partnerid;

}

public void setPartnerid(String partnerid) {

this.partnerid = partnerid;

}

public String getPrepayid() {

return prepayid;

}

public void setPrepayid(String prepayid) {

this.prepayid = prepayid;

}

public String getTimestamp() {

return timestamp;

}

public void setTimestamp(String timestamp) {

this.timestamp = timestamp;

}

service包中为工具类，其中重要的为WxSignUtil类

WxSignUtil类：

package com.ccunix.ihousekeeping.demo.service;

import java.io.BufferedInputStream;

import java.io.ByteArrayOutputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.IOException;

import java.io.InputStream;

import java.security.KeyStore;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import javax.crypto.spec.SecretKeySpec;

import javax.net.ssl.SSLContext;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.httpclient.HttpClient;

import org.apache.commons.httpclient.HttpStatus;

import org.apache.commons.httpclient.methods.PostMethod;

import org.apache.http.HttpEntity;

import org.apache.http.HttpResponse;

import org.apache.http.client.config.RequestConfig;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.conn.ssl.SSLConnectionSocketFactory;

import org.apache.http.conn.ssl.SSLContexts;

import org.apache.http.entity.StringEntity;

import org.apache.http.impl.client.CloseableHttpClient;

import org.apache.http.impl.client.HttpClients;

import org.apache.http.util.EntityUtils;

import org.dom4j.Document;

import org.dom4j.DocumentException;

import org.dom4j.DocumentHelper;

import org.dom4j.Element;

import com.alibaba.fastjson.JSONObject;

import com.ccunix.ihousekeeping.demo.domain.WxOa;

import com.ccunix.ihousekeeping.demo.domain.WxPayOa;

//微信签名

public class WxSignUtil {

// 微信预下单请求地址

public static final String unifiedorderUrl = "https://api.mch.weixin.qq.com/pay/unifiedorder";

// 微信申请退款请求地址

public static final String callbackamounturl = "https://api.mch.weixin.qq.com/secapi/pay/refund";

// 微信小程序统一下单地址

public static final String smallprogramorderurl = "https://api.mch.weixin.qq.com/pay/unifiedorder";

// 微信App支付预下单接口

public static Map WxMd5Sign(WxOa wxOa, String key) throws Exception {

String stringA = "appid=" + wxOa.getAppid() + "&attach=" + wxOa.getAttach() + "&body=" + wxOa.getBody()

+ "&mch_id=" + wxOa.getMch_id() + "&nonce_str=" + wxOa.getNonce_str() + "&notify_url="

+ wxOa.getNotify_url() + "&out_trade_no=" + wxOa.getOut_trade_no() + "&spbill_create_ip="

+ wxOa.getSpbill_create_ip() + "&total_fee=" + wxOa.getTotal_fee() + "&trade_type="

+ wxOa.getTrade_type();

String stringSignTemp = stringA + "&key=" + key;

String stringSignTemp1 = new String(stringSignTemp.getBytes("iso8859-1"));

// String stringSignTemp1=new String(stringSignTemp.getBytes("utf-8"));

String sign = LogisticsInfoMD5.encode(stringSignTemp1).toUpperCase();

String par = "<xml>" + "<appid>" + wxOa.getAppid() + "</appid>" + "<attach>" + wxOa.getAttach() + "</attach>"

+ "<body><![CDATA[" + wxOa.getBody() + "]]></body>" + "<mch_id>" + wxOa.getMch_id() + "</mch_id>"

+ "<nonce_str>" + wxOa.getNonce_str() + "</nonce_str>" + "<notify_url>" + wxOa.getNotify_url()

+ "</notify_url>" + "<out_trade_no>" + wxOa.getOut_trade_no() + "</out_trade_no>" + "<spbill_create_ip>"

+ wxOa.getSpbill_create_ip() + "</spbill_create_ip>" + "<total_fee>" + wxOa.getTotal_fee()

+ "</total_fee>" + "<trade_type>" + wxOa.getTrade_type() + "</trade_type>" + "<sign>" + sign + "</sign>"

+ "</xml> ";

String ret = WxSignUtil.post(unifiedorderUrl, par);

System.out.println(ret);

Map<String, String> map = readStringXmlOut(ret);

return map;

}

// 调起支付加签

public static String WxPrePaySign(WxPayOa wxPayOa, String key) throws Exception {

// //应用ID

// String appid="";

// //随机字符串

// String noncestr="";

// //扩展字段

// String packageace="";

// //商户号

// String partnerid="";

// //预支付交易会话ID

// String prepayid="";

// //时间戳

// String timestamp="";

String stringA = "appid=" + wxPayOa.getAppid() + "&noncestr=" + wxPayOa.getNoncestr() + "&package="

+ wxPayOa.getPackageace() + "&partnerid=" + wxPayOa.getPartnerid() + "&prepayid="

+ wxPayOa.getPrepayid() + "&timestamp=" + wxPayOa.getTimestamp();

String stringSignTemp = stringA + "&key=" + key;

String stringSignTemp1 = new String(stringSignTemp.getBytes("iso8859-1"));

// String stringSignTemp1=new String(stringSignTemp.getBytes("utf-8"));

String sign = LogisticsInfoMD5.encode(stringSignTemp1).toUpperCase();

return sign;

}

/**

* 发送xml数据请求到server端

* @param url

* xml请求数据地址

* @param xmlString

* 发送的xml数据流

* @return null发送失败，否则返回响应内容

public static String post(String url, String xmlFileName) {

// 关闭

System.setProperty("org.apache.commons.logging.Log", "org.apache.commons.logging.impl.SimpleLog");

System.setProperty("org.apache.commons.logging.simplelog.showdatetime", "true");

System.setProperty("org.apache.commons.logging.simplelog.log.org.apache.commons.httpclient", "stdout");

// 创建httpclient工具对象

HttpClient client = new HttpClient();

// 创建post请求方法

PostMethod myPost = new PostMethod(url);

// 设置请求超时时间

client.setConnectionTimeout(300 * 1000);

String responseString = null;

try {

// 设置请求头部类型

myPost.setRequestHeader("Content-Type", "text/xml");

myPost.setRequestHeader("charset", "iso8859-1");

// myPost.setRequestHeader("charset","utf-8");

// 设置请求体，即xml文本内容，注：这里写了两种方式，一种是直接获取xml内容字符串，一种是读取xml文件以流的形式

myPost.setRequestBody(xmlFileName);

// InputStream body=this.getClass().getResourceAsStream("/"+xmlFileName);

// myPost.setRequestBody(body);

// myPost.setRequestEntity(new

// StringRequestEntity(xmlString,"text/xml","utf-8"));

int statusCode = client.executeMethod(myPost);

if (statusCode == HttpStatus.SC_OK) {

BufferedInputStream bis = new BufferedInputStream(myPost.getResponseBodyAsStream());

byte[] bytes = new byte[1024];

ByteArrayOutputStream bos = new ByteArrayOutputStream();

int count = 0;

while ((count = bis.read(bytes)) != -1) {

bos.write(bytes, 0, count);

}

byte[] strByte = bos.toByteArray();

responseString = new String(strByte, 0, strByte.length, "utf-8");

// System.out.println(responseString);

bos.close();

bis.close();

}

} catch (Exception e) {

e.printStackTrace();

}

myPost.releaseConnection();

return responseString;

}

/**

* @description 将xml字符串转换成map

* @param xml

* @return Map

public static Map<String, String> readStringXmlOut(String xml) {

Map<String, String> map = new HashMap<String, String>();

Document doc = null;

try {

doc = DocumentHelper.parseText(xml); // 将字符串转为XML

Element rootElt = doc.getRootElement(); // 获取根节点

@SuppressWarnings("unchecked")

List<Element> list = rootElt.elements();// 获取根节点下所有节点

for (Element element : list) { // 遍历节点

map.put(element.getName(), element.getText()); // 节点的name为map的key，text为map的value

}

} catch (DocumentException e) {

e.printStackTrace();

} catch (Exception e) {

e.printStackTrace();

}

return map;

}

// 支付回调验证签名

public static boolean wxPayChack(Map map, String key) throws Exception {

String stringA = "appid=" + map.get("appid") + "&attach=" + map.get("attach") + "&bank_type="

+ map.get("bank_type") + "&cash_fee=" + map.get("cash_fee") + "" + "&fee_type=" + map.get("fee_type")

+ "&is_subscribe=" + map.get("is_subscribe") + "&mch_id=" + map.get("mch_id") + "&nonce_str="

+ map.get("nonce_str") + "&openid=" + map.get("openid") + "&out_trade_no=" + map.get("out_trade_no")

+ "&result_code=" + map.get("result_code") + "&return_code=" + map.get("return_code") + "&time_end="

+ map.get("time_end") + "&total_fee=" + map.get("total_fee") + "&trade_type=" + map.get("trade_type")

+ "&transaction_id=" + map.get("transaction_id");

String stringSignTemp = stringA + "&key=" + key;

String stringSignTemp1 = new String(stringSignTemp.getBytes("iso8859-1"));

String sign = LogisticsInfoMD5.encode(stringSignTemp1).toUpperCase();

String retSign = (String) map.get("sign");

if (retSign.equals(sign)) {

return true;

}

return false;

}

// 接收微信回调request 获取xml参数信息

public static Map<String, String> inputStream2String(HttpServletRequest request) throws Exception {

InputStream is = request.getInputStream();

String xml = WxSignUtil.inputStream2String(is, "utf-8");

return WxSignUtil.readStringXmlOut(xml);

}

/**

* InputStream流转换成String字符串

* @param inStream

* InputStream流

* @param encoding

* 编码格式

* @return String字符串

public static String inputStream2String(InputStream inStream, String encoding) {

String result = null;

try {

if (inStream != null) {

ByteArrayOutputStream outStream = new ByteArrayOutputStream();

byte[] tempBytes = new byte[1000];

int count = -1;

while ((count = inStream.read(tempBytes, 0, 1000)) != -1) {

outStream.write(tempBytes, 0, count);

}

tempBytes = null;

outStream.flush();

result = new String(outStream.toByteArray(), encoding);

}

} catch (Exception e) {

result = null;

}

return result;

}

// 获取用户的openid

public static String getUserOpenId(Map<String, String> map) {

String param = "appid=" + map.get("openappid") + "&secret=" + map.get("opensecret") + "&code=" + map.get("code")

+ "&grant_type=authorization_code";

String ret = HttpUtil.doGet(map.get("openidurl"), param);

JSONObject jon = JSONObject.parseObject(ret);

String openId = jon.getString("openid");

return openId;

}

// 微信公众号预下单

public static Map WxH5Md5Sign(Map map, String key) throws Exception {

// //公众账号ID

// String appid="";

// //商品描述

// String body="";

// //商户号

// String mch_id="";

// //随机字符串

// String nonce_str="";

// //通知地址

// String notify_url="";

// //用户标识

// String openid="";

// //商户订单号

// String out_trade_no="";

// //终端IP

// String spbill_create_ip="";

// //订单总金额

// int total_fee=0;

// //交易类型

// String trade_type="";

String stringA = "appid=" + map.get("openappid") + "&body=" + map.get("body") + "&mch_id="

+ map.get("openmchid") + "&nonce_str=" + map.get("nonce_str") + "&notify_url="

+ map.get("opencallbackurl") + "&openid=" + map.get("openid") + "&out_trade_no="

+ map.get("out_trade_no") + "&spbill_create_ip=127.0.0.1&total_fee=" + map.get("total_fee")

+ "&trade_type=JSAPI";

String stringSignTemp = stringA + "&key=" + key;

// String stringSignTemp1=new String(stringSignTemp.getBytes("iso8859-1"));

String stringSignTemp1 = new String(stringSignTemp.getBytes("utf-8"));

String sign = LogisticsInfoMD5.encode(stringSignTemp1).toUpperCase();

String par = "<xml>" + "<appid><![CDATA[" + map.get("openappid") + "]]></appid>" + "<mch_id><![CDATA["

+ map.get("openmchid") + "]]></mch_id>" + "<openid><![CDATA[" + map.get("openid") + "]]></openid>"

+ "<body><![CDATA[" + map.get("body") + "]]></body>" + "<nonce_str><![CDATA[" + map.get("nonce_str")

+ "]]></nonce_str>" + "<notify_url><![CDATA[" + map.get("opencallbackurl") + "]]></notify_url>"

+ "<out_trade_no><![CDATA[" + map.get("out_trade_no") + "]]></out_trade_no>"

+ "<spbill_create_ip><![CDATA[127.0.0.1]]></spbill_create_ip>" + "<total_fee><![CDATA["

+ map.get("total_fee") + "]]></total_fee>" + "<trade_type><![CDATA[JSAPI]]></trade_type>" + "<sign>"

+ sign + "</sign>" + "</xml>";

// B8971A5E8220F8B9A1C314FDDA7440C4

String ret = WxSignUtil.post("https://api.mch.weixin.qq.com/pay/unifiedorder", par);

Map<String, String> mapret = readStringXmlOut(ret);

return mapret;

}

// 公众号预下单回调验证签名

public static boolean orderPayCallbackChack(Map map, String key) throws Exception {

String stringA = "appid=" + map.get("appid") + "&bank_type=" + map.get("bank_type") + "&cash_fee="

+ map.get("cash_fee") + "&fee_type=" + map.get("fee_type") + "&is_subscribe=" + map.get("is_subscribe")

+ "&mch_id=" + map.get("mch_id") + "&nonce_str=" + map.get("nonce_str") + "&openid=" + map.get("openid")

+ "&out_trade_no=" + map.get("out_trade_no") + "&result_code=" + map.get("result_code")

+ "&return_code=" + map.get("return_code") + "&time_end=" + map.get("time_end") + "&total_fee="

+ map.get("total_fee") + "&trade_type=" + map.get("trade_type") + "&transaction_id="

+ map.get("transaction_id");

String stringSignTemp = stringA + "&key=" + key;

String stringSignTemp1 = new String(stringSignTemp.getBytes("utf-8"));

String sign = LogisticsInfoMD5.encode(stringSignTemp1).toUpperCase();

String retsign = map.get("sign") + "";

if (sign.equals(retsign)) {

return true;

}

return false;

}

// 公众号调起支付签名

public static String openSignPayMd5(Map map, String key) throws Exception {

// 公众号id

String appId = "";

// 时间戳

String timeStamp = "";

// 随机字符串

String nonceStr = "";

// 订单详情扩展字符串

String packageout = "";

// 签名方式

String signType = "";

// String

// stringA="appid=wx8731a2e298f48739&nonceStr=123456&package=123456&signType=MD5&timeStamp=123456";

String stringA = "appId=" + map.get("appId") + "&nonceStr=" + map.get("nonceStr") + "&package="

+ map.get("package") + "&signType=" + map.get("signType") + "&timeStamp=" + map.get("timeStamp");

String stringSignTemp = stringA + "&key=" + key;

// String stringSignTemp1=new String(stringSignTemp.getBytes("iso8859-1"));

String stringSignTemp1 = new String(stringSignTemp.getBytes("utf-8"));

String sign = LogisticsInfoMD5.encode(stringSignTemp1).toUpperCase();

return sign;

}

// 微信支付商户退款

public static Map wxPayMachBackToUser(Map map, String key) throws Exception {

// //公众账号ID

// String appid="";

// //商户号

// String mch_id="";

// //随机字符串

// String nonce_str="";

// //微信订单号流水号

// String transaction_id="";

//// //商户订单号

//// String out_trade_no="";

// //商户退款单号

// String out_refund_no="";

// //订单金额订单总金额，单位为分，只能为整数

// String total_fee="";

// //退款金额

// String refund_fee="";

// 退款结果通知url

// String notify_url="";

String stringA = "appid=" + map.get("appid") + "&mch_id=" + map.get("mch_id") + "&nonce_str="

+ map.get("nonce_str") + "&notify_url=" + map.get("notify_url") + "&out_refund_no="

+ map.get("out_refund_no") + "&refund_fee=" + map.get("refund_fee") + "&total_fee="

+ map.get("total_fee") + "&transaction_id=" + map.get("transaction_id");

String stringSignTemp = stringA + "&key=" + key;

// String stringSignTemp1=new String(stringSignTemp.getBytes("iso8859-1"));

String stringSignTemp1 = new String(stringSignTemp.getBytes("utf-8"));

String sign = LogisticsInfoMD5.encode(stringSignTemp1).toUpperCase();

String par = "<xml>" + " <appid><![CDATA[" + map.get("appid") + "]]></appid>" + " <mch_id><![CDATA["

+ map.get("mch_id") + "]]></mch_id>" + " <nonce_str><![CDATA[" + map.get("nonce_str")

+ "]]></nonce_str>" + " <notify_url><![CDATA[" + map.get("notify_url") + "]]></notify_url>"

+ " <out_refund_no><![CDATA[" + map.get("out_refund_no") + "]]></out_refund_no>"

+ " <refund_fee><![CDATA[" + map.get("refund_fee") + "]]></refund_fee>" + " <total_fee><![CDATA["

+ map.get("total_fee") + "]]></total_fee>" + " <transaction_id><![CDATA[" + map.get("transaction_id")

+ "]]></transaction_id>" + " <sign>" + sign + "</sign>" + "</xml>";

// String ret=WxSignUtil.post("https://api.mch.weixin.qq.com/secapi/pay/refund",

// par);

String ret = WxSignUtil.postData("https://api.mch.weixin.qq.com/secapi/pay/refund", par, map.get("mch_id") + "",

map.get("keyPath") + "");

Map<String, String> mapret = readStringXmlOut(ret);

return mapret;

}

// 解密微信退款加密字段

public static Map desDecodeWxPayCallBack(Map<String, String> map, String key) throws Exception {

// 对商户key做md5，得到32位小写key*

// String mdkey=LogisticsInfoMD5.encode(key).toLowerCase();

SecretKeySpec mdkey = new SecretKeySpec(LogisticsInfoMD5.encode(key).toLowerCase().getBytes(), "AES");

// 微信订单号

String transaction_id = map.get("transaction_id");

if (transaction_id != null) {

// 对加密串A做base64解码，得到加密串B

transaction_id = new String(Base64Util.decode(transaction_id));

transaction_id = AESUtil.decryptData(transaction_id, mdkey);

map.put(transaction_id, transaction_id);

}

return map;

}

private static int socketTimeout = 10000;// 连接超时时间，默认10秒

private static int connectTimeout = 30000;// 传输超时时间，默认30秒

private static RequestConfig requestConfig;// 请求器的配置

private static CloseableHttpClient httpClient;// HTTP请求器

/**

* 通过Https往API post xml数据

* @param url

* API地址

* @param xmlObj

* 要提交的XML数据对象

* @param mchId

* 商户ID

* @param certPath

* 证书位置

* @return

public static String postData(String url, String xmlObj, String mchId, String certPath) {

// 加载证书

try {

initCert(mchId, certPath);

} catch (Exception e) {

e.printStackTrace();

}

String result = null;

HttpPost httpPost = new HttpPost(url);

// 得指明使用UTF-8编码，否则到API服务器XML的中文不能被成功识别

StringEntity postEntity = new StringEntity(xmlObj, "UTF-8");

httpPost.addHeader("Content-Type", "text/xml");

httpPost.setEntity(postEntity);

// 根据默认超时限制初始化requestConfig

requestConfig = RequestConfig.custom().setSocketTimeout(socketTimeout).setConnectTimeout(connectTimeout)

.build();

// 设置请求器的配置

httpPost.setConfig(requestConfig);

try {

HttpResponse response = null;

try {

response = httpClient.execute(httpPost);

} catch (IOException e) {

e.printStackTrace();

}

HttpEntity entity = response.getEntity();

try {

result = EntityUtils.toString(entity, "UTF-8");

} catch (IOException e) {

e.printStackTrace();

}

} finally {

httpPost.abort();

}

return result;

}

/**

* 加载证书

* @param mchId

* 商户ID

* @param certPath

* 证书位置

* @throws Exception

private static void initCert(String mchId, String certPath) throws Exception {

// 证书密码，默认为商户ID

String key = mchId;

// 证书的路径

String path = certPath;

// 指定读取证书格式为PKCS12

KeyStore keyStore = KeyStore.getInstance("PKCS12");

// 读取本机存放的PKCS12证书文件

FileInputStream instream = new FileInputStream(new File(path));

try {

// 指定PKCS12的密码(商户ID)

keyStore.load(instream, key.toCharArray());

} finally {

instream.close();

}

SSLContext sslcontext = SSLContexts.custom().loadKeyMaterial(keyStore, key.toCharArray()).build();

SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslcontext, new String[] { "TLSv1" }, null,

SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);

httpClient = HttpClients.custom().setSSLSocketFactory(sslsf).build();

}

// 微信小程序統一下單

public static Map WxSmallProgramMd5Sign(Map map, String key) throws Exception {

String stringA = "appid=" + map.get("appid") + "&attach=" + map.get("attach") + "&body=" + map.get("body")

+ "&mch_id=" + map.get("mch_id") + "&nonce_str=" + map.get("nonce_str") + "&notify_url="

+ map.get("notify_url") + "&openid=" + map.get("openid") + "&out_trade_no=" + map.get("out_trade_no")

+ "&spbill_create_ip=" + map.get("spbill_create_ip") + "&total_fee=" + map.get("total_fee")

+ "&trade_type=" + map.get("trade_type");

String stringSignTemp = stringA + "&key=" + key;

String stringSignTemp1 = new String(stringSignTemp.getBytes("iso8859-1"));

// String stringSignTemp1=new String(stringSignTemp.getBytes("utf-8"));

String sign = LogisticsInfoMD5.encode(stringSignTemp1).toUpperCase();

String par = "<xml>" + "<appid>" + map.get("appid") + "</appid>" + "<attach>" + map.get("attach") + "</attach>"

+ "<body>" + map.get("body") + "</body>" + "<mch_id>" + map.get("mch_id") + "</mch_id>" + "<nonce_str>"

+ map.get("nonce_str") + "</nonce_str>" + "<notify_url>" + map.get("notify_url") + "</notify_url>"

+ "<openid>" + map.get("openid") + "</openid>" + "<out_trade_no>" + map.get("out_trade_no")

+ "</out_trade_no>" + "<spbill_create_ip>" + map.get("spbill_create_ip") + "</spbill_create_ip>"

+ "<total_fee>" + map.get("total_fee") + "</total_fee>" + "<trade_type>" + "JSAPI" + "</trade_type>"

+ "<sign>" + sign + "</sign>" + "</xml>";

String ret = WxSignUtil.post(smallprogramorderurl, par);

Map<String, String> retmap = readStringXmlOut(ret);

return retmap;

}

// 微信小程序调起支付签名

public static Map wxSmallProgramPaySign(Map map, String key) throws Exception {

String stringA = "appId=" + map.get("appid") + "&nonceStr=" + map.get("nonceStr") + "&package=prepay_id="

+ map.get("prepay_id") + "&signType=MD5&timeStamp=" + map.get("timeStamp");

String stringSignTemp = stringA + "&key=" + key;

String stringSignTemp1 = new String(stringSignTemp.getBytes("iso8859-1"));

// String stringSignTemp1=new String(stringSignTemp.getBytes("utf-8"));

String sign = LogisticsInfoMD5.encode(stringSignTemp1).toUpperCase();

Map retmap = new HashMap();

retmap.put("time", map.get("timeStamp"));

retmap.put("package", "prepay_id=" + map.get("prepay_id"));

retmap.put("paySign", sign);

retmap.put("signType", "MD5");

retmap.put("nonceStr", map.get("nonceStr"));

return retmap;

}

// 微信小程序获得openid

public static String wxSmallProgramGetOpenId(Map map, String secret) throws Exception {

String getUrl = "https://api.weixin.qq.com/sns/jscode2session";

String param = "appid=" + map.get("appid") + "&secret=" + secret + "&js_code=" + map.get("code")

+ "&grant_type=authorization_code";

String ret = HttpUtil.doGet(getUrl, param);

// {"session_key":"vz5yE67kF3p8CKpTtLgobw==","openid":"oMEFK5M53RmMPTow1_GoBRKkrOI4"}

JSONObject json = JSONObject.parseObject(ret);

String openid = json.getString("openid");

String session_key = json.getString("session_key");

return openid + "," + session_key;

}

// 查询微信订单

public static void queryOrderPayInfo() throws Exception {

String stringA = "appid=wx608bbf2ae0956623&mch_id=1512285851&nonce_str=456168546545&out_trade_no=0a3f639a3f174529a7ca236632f36d4d&key=9dffe0f7a65bb1976d4b33d7a8b1f7ac";

String stringSignTemp = stringA;

String stringSignTemp1 = new String(stringSignTemp.getBytes("utf-8"));

String sign = LogisticsInfoMD5.encode(stringSignTemp1).toUpperCase();

String par = "<xml>" + "<appid><![CDATA[wx608bbf2ae0956623]]></appid>"

+ "<mch_id><![CDATA[1512285851]]></mch_id>" + "<nonce_str><![CDATA[456168546545]]></nonce_str>"

+ "<out_trade_no><![CDATA[0a3f639a3f174529a7ca236632f36d4d]]></out_trade_no>" + "<sign>" + sign

+ "</sign>" + "</xml>";

String ret = WxSignUtil.post("https://api.mch.weixin.qq.com/pay/orderquery", par);

Map<String, String> mapret = readStringXmlOut(ret);

System.out.println(mapret);

}

pom.xml:

<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">

<groupId>isweb</groupId>

<artifactId>ccunix.is</artifactId>

<version>0.0.1-SNAPSHOT</version>

<srping.version>4.0.2.RELEASE</srping.version>

<mybatis.version>3.2.8</mybatis.version>

<slf4j.version>1.7.12</slf4j.version>

<log4j.version>1.2.17</log4j.version>

</properties>

<groupId>junit</groupId>

<artifactId>junit</artifactId>

</dependency>

<groupId>javax</groupId>

<artifactId>javaee-api</artifactId>

<scope>provided</scope>

</dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-test</artifactId>

<version>${srping.version}</version>

</dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-core</artifactId>

<version>${srping.version}</version>

</dependency>

<groupId>com.google.zxing</groupId>

<artifactId>javase</artifactId>

</dependency>

<groupId>org.apache.httpcomponents</groupId>

<artifactId>httpclient</artifactId>

</dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-oxm</artifactId>

<version>${srping.version}</version>

</dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-tx</artifactId>

<version>${srping.version}</version>

</dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-jdbc</artifactId>

<version>${srping.version}</version>

</dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-aop</artifactId>

<version>${srping.version}</version>

</dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-context</artifactId>

<version>${srping.version}</version>

</dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-context-support</artifactId>

<version>${srping.version}</version>

</dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-expression</artifactId>

<version>${srping.version}</version>

</dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-orm</artifactId>

<version>${srping.version}</version>

</dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-web</artifactId>

<version>${srping.version}</version>

</dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-webmvc</artifactId>

<version>${srping.version}</version>

</dependency>

<groupId>org.mybatis</groupId>

<artifactId>mybatis</artifactId>

<version>${mybatis.version}</version>

</dependency>

<groupId>org.mybatis</groupId>

<artifactId>mybatis-spring</artifactId>

</dependency>

<groupId>mysql</groupId>

<artifactId>mysql-connector-java</artifactId>

</dependency>

<groupId>commons-dbcp</groupId>

<artifactId>commons-dbcp</artifactId>

</dependency>

</dependency>

<groupId>com.belerweb</groupId>

<artifactId>pinyin4j</artifactId>

</dependency>

<version>${log4j.version}</version>

</dependency>

<version>${slf4j.version}</version>

</dependency>

<version>${slf4j.version}</version>

</dependency>

<groupId>com.alibaba</groupId>

<artifactId>fastjson</artifactId>

</dependency>

<groupId>org.codehaus.jackson</groupId>

<artifactId>jackson-mapper-asl</artifactId>

</dependency>

<groupId>com.fasterxml.jackson.core</groupId>

<artifactId>jackson-databind</artifactId>

</dependency>

<groupId>commons-fileupload</groupId>

<artifactId>commons-fileupload</artifactId>

</dependency>

<groupId>commons-io</groupId>

<artifactId>commons-io</artifactId>

</dependency>

<groupId>commons-codec</groupId>

<artifactId>commons-codec</artifactId>

</dependency>

<groupId>org.aspectj</groupId>

<artifactId>aspectjweaver</artifactId>

</dependency>

<groupId>org.springframework.data</groupId>

<artifactId>spring-data-redis</artifactId>

<version>1.0.2.RELEASE</version>

</dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-test</artifactId>

<version>3.1.2.RELEASE</version>

</dependency>

<groupId>redis.clients</groupId>

<artifactId>jedis</artifactId>

</dependency>

<groupId>org.eclipse.paho</groupId>

<artifactId>org.eclipse.paho.client.mqttv3</artifactId>

</dependency>

<groupId>commons-codec</groupId>

<artifactId>commons-codec</artifactId>

</dependency>

</dependency>

<groupId>org.apache.httpcomponents</groupId>

<artifactId>httpclient</artifactId>

</dependency>

<groupId>org.apache.poi</groupId>

</dependency>

<groupId>org.apache.poi</groupId>

<artifactId>poi-ooxml</artifactId>

</dependency>

<groupId>org.hibernate</groupId>

<artifactId>hibernate-validator</artifactId>

<version>5.3.0.Alpha1</version>

</dependency>

</dependency>

</dependency>

<groupId>org.bouncycastle</groupId>

<artifactId>bcprov-jdk15on</artifactId>

</dependency>

<groupId>commons-codec</groupId>

<artifactId>commons-codec</artifactId>

</dependency>

</dependency>

<groupId>com.baidu.aip</groupId>

</dependency>

</dependencies>

<build>

<groupId>org.apache.maven.plugins</groupId>

<artifactId>maven-compiler-plugin</artifactId>

</configuration>

</plugin>

<groupId>org.apache.maven.plugins</groupId>

<artifactId>maven-war-plugin</artifactId>

</plugin>

</plugins>

<finalName>maven_project</finalName>

</build>

</project>

点击支付页面：demo.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"

pageEncoding="UTF-8"%>

<%@include file="/WEB-INF/html/base/baseurl.jsp"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<title>Insert title here</title>

</head>

<body>

src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>

$(document).ready(function() {

$("#yuzhifu").click(function() {

alert(6)

//js方法的调用

yuzhifu();

});

function yuzhifu() {

//通过Ajax调用

$.ajax({

url : getRootPath() + "/Pay_Controller/yuxiadan.action",

data : null,

success : info

});

}

function info(data) {

var d = $(data);

//页面跳转，并将code_url传到另一个页面中

location.href = getRootPath()

+ "/BaseMultiController/toPage.action?page=main/demo/qrcode&param="

+ d[0].code_url;

}

</script>

</body>

</html>

生成二维码页面：qrcode.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"

pageEncoding="UTF-8"%>

<%@include file="/WEB-INF/html/base/baseurl.jsp"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<head>

<title>Javascript 二维码生成库：QRCode</title>

out.print("<input type="hidden" id="hidden" value="");%><%=request.getAttribute("param") %><% out.print(""");

content="width=device-width,initial-scale=1,user-scalable=no" />

src="http://cdn.staticfile.org/jquery/2.1.1/jquery.min.js"></script>

src="http://static.runoob.com/assets/qrcode/qrcode.min.js"></script>

</head>

<body>

<!-- <input id="text" type="text" value="http://www.runoob.com"

style=" 80%" /> -->

<br />

var qrcode = new QRCode(document.getElementById("qrcode"), {

width : 300,

height : 300

});

function makeCode() {

var elText = document.getElementById("hidden");

if (!elText.value) {

alert("Input a text");

elText.focus();

return;

}

qrcode.makeCode(elText.value);

}

makeCode();

$("#text").on("blur", function() {

makeCode();

}).on("keydown", function(e) {

if (e.keyCode == 13) {

makeCode();

}

});

</script>

</body>

</html>

注意：appid需要跟商户号绑定