书单推荐：成为Java顶级程序员架构师 ，这20来本(高薪)必看点击获取
一：准备工作
1：先去微信公众平台注册一个公众号，选择服务号
2：去微信商户平台注册一个商户号，用于收款
3：在商户号中配置对应的公众号的APPID
4：支付结果异步通知（需要重点注意）
注意：请先详细查看官方文档按步骤开发，一切以官方文档为主 微信Navicat支付官方文档
5：测试的时候一定要使用内网穿透软件，否则回调时会报错
二：开发代码
WeChatPayConfig：
public class WeChatPayConfig {
//公众号APPID
private String APPID = "";
//商户号KEY
private String KEY = "";
//商户号ID
private String MCHID = "";
//支付完成后微信回调地址，需要外网能访问要是域名，不能是127.0.0.1跟localhost
private String NOTIFY_URL = "";
}
WeChatPayServcie：
public interface WeChatPayServcie {
//微信支付下单
public Map<String,String> getWxpayUrl(Map<String, String> sourceMap);
//订单查询
public String orderQuery(String out_trade_no);
}
@Service
public class WeChatPayServiceImpl implements WeChatPayServcie {
/**
* 微信支付请求
* @param sourceMap
* @return
*/
public Map<String,String> getWxpayUrl(Map<String, String> sourceMap) {
SortedMap<String, Object> signParams = new TreeMap<String, Object>();
String nonce_str = UUID.randomUUID().toString().trim().replaceAll("-", "");
signParams.put("appid", PayConfig.APPID);
signParams.put("mch_id",PayConfig.MCHID);
signParams.put("nonce_str",sourceMap.get("nonce_str"));
signParams.put("product_id",sourceMap.get("prod_id"));
signParams.put("body",sourceMap.get("body"));
signParams.put("out_trade_no",sourceMap.get("out_trade_no"));
signParams.put("total_fee",sourceMap.get("total_fee"));
signParams.put("spbill_create_ip", WxUtil.getIp());
signParams.put("notify_url",PayConfig.NOTYFLY_URL);
signParams.put("trade_type","NATIVE");
String sign = WxUtil.createSign(signParams,PayConfig.KEY);
signParams.put("sign",sign);
String xmlPackage = WxUtil.parseMapXML(signParams);
Map<String, Object> resultMap = new HashMap();
try {
String result = HttpUtil.post("https://api.mch.weixin.qq.com/pay/unifiedorder",xmlPackage);
resultMap = WxUtil.parseXmlMap(result);
} catch (Exception e) {
e.printStackTrace();
}
String returnCode = (String) resultMap.get("return_code");
String returnMsg = (String) resultMap.get("return_msg");
if (returnCode.equalsIgnoreCase("FAIL")) {
throw new RuntimeException(returnMsg);
}
String result_code = (String) resultMap.get("result_code");
if (result_code.equalsIgnoreCase("FAIL")) {
throw new RuntimeException(resultMap.get("err_code_des"));
}
String code_url = (String) resultMap.get("code_url");
Map<String,String> map = new HashMap<>();
map.put("code_url",code_url);
map.put("out_trade_no",sourceMap.get("out_trade_no"));
return map;
}
/**
* 微信支付订单查询
* @param out_trade_no
* @return
*/
public String orderQuery(String out_trade_no) {
String nonce_str = UUID.randomUUID().toString().trim().replaceAll("-", "");
SortedMap<String, Object> signParams = new TreeMap<>();
signParams.put("appid", payConfig.getWeChatPorpetties().getAppId());
signParams.put("mch_id",payConfig.getWeChatPorpetties().getMchId());
signParams.put("out_trade_no",out_trade_no);
signParams.put("nonce_str",nonce_str);
String sign = WxUtil.createSign(signParams,payConfig.getWeChatPorpetties().getApiKey());
signParams.put("sign",sign);
String xmlPackage = WxUtil.parseMapXML(signParams);
Map<String, Object> resultMap = new HashMap();
try {
String result = HttpUtil.post("https://api.mch.weixin.qq.com/pay/orderquery",xmlPackage);
resultMap = WxUtil.parseXmlMap(result);
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException("渠道网络异常");
}
String returnCode = (String) resultMap.get("return_code");
String returnMsg = (String) resultMap.get("return_msg");
if (returnCode.equalsIgnoreCase(PayContants.FAIL)) {
throw new RuntimeException(returnMsg);
}
String result_code = (String) resultMap.get("result_code");
if (result_code.equalsIgnoreCase(PayContants.FAIL)) {
throw new RuntimeException(resultMap.get("err_code_des"));
}
String trade_state = (String) resultMap.get("trade_state");
return trade_state;
}
}
WeChatPayController：
/**
* 微信支付接口
*/
@Controller
public class WxPayController {
@Autowired
WeChatPayServcie weChatPayServcie;
/**
* 微信支付下单
* payID可以不用传自己生成32位以内的随机数就好，要保证不重复
* totalFee金额一定要做判断，判断这笔支付金额与数据库是否一致
*/
@RequestMapping("pay")
@ResponseBody
public Map<String ,String> toWxpay(HttpServletRequest httpRequest,String payId, String totalFee, String body){
System.out.println("开始微信支付...");
Map<String, String> map = new HashMap<>();
String nonce_str = UUID.randomUUID().toString().trim().replaceAll("-", "");
//生成一笔支付记录
//拼接支付参数
Map<String, String> paramMap = new HashMap<>();
paramMap.put("nonce_str", nonce_str);
paramMap.put("prod_id", payId);
paramMap.put("body", body);
paramMap.put("total_fee", totalFee);
paramMap.put("out_trade_no", payId);
//发送支付请求并获取返回参数与二维码，用于支付与调用查询接口
Map<String, String> returnMap = weChatPayServcie.getWxpayUrl(paramMap);
httpRequest.setAttribute("out_trade_no", payId);
httpRequest.setAttribute("total_fee", totalFee);
//code_url就是二维码URL，可以把这个URL放到草料二维码中生成微信二维码
httpRequest.setAttribute("code_url", returnMap.get("code_url"));
map.put("out_trade_no", payId);
map.put("total_fee", String.valueOf(bigDecimal));
map.put("code_url", returnMap.get("code_url"));
return map;
}
/**
* 查询微信订单
* ot_trade_no是支付
*/
@RequestMapping("query")
@ResponseBody
public Root<String> orderQuery(String out_trade_no){
return weixinPayServcie.orderQuery(queryCallbackForm.getOut_trade_no());
}
/**
* 微信支付回调，这个地址就是Config中的NOTYFLY_URL
*/
@RequestMapping("callback")
public void notify_url(HttpServletRequest request, HttpServletResponse response) throws DocumentException, ServletException, IOException,Throwable {
System.out.print("微信支付回调获取数据开始...");
String inputLine;
String notityXml = "";
try {
while ((inputLine = request.getReader().readLine()) != null) {
notityXml += inputLine;
}
request.getReader().close();
} catch (Exception e) {
WxUtil.sendXmlMessage(request,response, PayContants.FAIL);
throw new RuntimeException("回调数据xml获取失败！");
}
if(StringUtils.isEmpty(notityXml)){
WxUtil.sendXmlMessage(request,response, PayContants.FAIL);
throw new RuntimeException("回调数据xml为空！");
}
Map<String ,Object> resultMap = XMLParse.parseXmlMap(notityXml);
String returnCode = (String) resultMap.get("return_code");
String returnMsg = (String) resultMap.get("return_msg");
if (returnCode.equalsIgnoreCase(PayContants.FAIL)) {
WxUtil.sendXmlMessage(request,response, PayContants.FAIL);
throw new RuntimeException(returnMsg);
}
String resultCode = (String) resultMap.get("result_code");
if (resultCode.equalsIgnoreCase(PayContants.FAIL)) {
WxUtil.sendXmlMessage(request,response, PayContants.FAIL);
throw new RuntimeException(resultMap.get("err_code_des"));
}
SortedMap<String ,Object> paramMap = new TreeMap<>();
paramMap.put("appid",resultMap.get("appid"));
paramMap.put("mch_id",resultMap.get("mch_id"));
paramMap.put("nonce_str",resultMap.get("nonce_str"));
paramMap.put("body",resultMap.get("body"));
paramMap.put("openid", resultMap.get("openid"));
paramMap.put("is_subscribe",resultMap.get("is_subscribe"));
paramMap.put("trade_type",resultMap.get("trade_type"));
paramMap.put("bank_type",resultMap.get("bank_type"));
paramMap.put("total_fee",resultMap.get("total_fee"));
paramMap.put("fee_type",resultMap.get("fee_type"));
paramMap.put("cash_fee",resultMap.get("cash_fee"));
paramMap.put("transaction_id",resultMap.get("transaction_id"));
paramMap.put("out_trade_no",resultMap.get("out_trade_no"));
paramMap.put("time_end",resultMap.get("time_end"));
paramMap.put("return_code",resultMap.get("return_code"));
paramMap.put("return_msg",resultMap.get("return_msg"));
paramMap.put("result_code",resultMap.get("result_code"));
String out_trade_no = (String) resultMap.get("out_trade_no");
String sign = SignUtil.createSign(paramMap,WxPayConfig.KEY);
String mySign =(String) resultMap.get("sign");
//回调一定要验证签名以防数据被篡改
if(sign.equals(mySign)){
System.out.println("回调签名验证成功！");
//修改业务逻辑，将那笔支付状态改为已支付
}
WxUtil.sendXmlMessage(request,response, PayContants.SUCCESS);
}else{
WxUtil.sendXmlMessage(request,response, PayContants.FAIL);
throw new RuntimeException("签名不一致！");
}
}
}
WxUtil：
package com.ys.commons.utils.pay;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.InetAddress;
import java.net.UnknownHostException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
//微信工具类
public class WxUtil {
//获取当前IP
public static String getIp() {
try {
String spbill_create_ip = InetAddress.getLocalHost().getHostAddress();
return spbill_create_ip;
} catch (UnknownHostException var2) {
var2.printStackTrace();
return "获取IP失败...";
}
}
//输出xml格式
public static void sendXmlMessage(HttpServletRequest request, HttpServletResponse response, String content) {
try {
String contentXml = "<xml><return_code><![CDATA[" + content + "]]></return_code></xml>";
OutputStream os = response.getOutputStream();
BufferedWriter resBr = new BufferedWriter(new OutputStreamWriter(os));
resBr.write(contentXml);
resBr.flush();
resBr.close();
} catch (IOException var6) {
var6.printStackTrace();
}
}
//生成sign签名
public static String createSign(SortedMap<String, Object> packageParams, String KEY) {
StringBuffer sb = new StringBuffer();
Set<Entry<String, Object>> es = packageParams.entrySet();
Iterator it = es.iterator();
while(it.hasNext()) {
Entry<String, Object> entry = (Entry)it.next();
String k = (String)entry.getKey();
String v = (String)entry.getValue();
if(null != v && !"".equals(v) && !"sign".equals(k) && !"key".equals(k)) {
sb.append(k + "=" + v + "&");
}
}
sb.append("key=" + KEY);
String sign = MD5Util.MD5Encode(sb.toString(), "UTF-8").toUpperCase();
return sign;
}
//将map转为xml
public static String parseMapXML(SortedMap<String, Object> map) {
String xmlResult = "";
StringBuffer sb = new StringBuffer();
sb.append("<xml>");
Iterator var3 = map.keySet().iterator();
while(var3.hasNext()) {
String key = (String)var3.next();
String value = "<![CDATA[" + map.get(key) + "]]>";
sb.append("<" + key + ">" + value + "</" + key + ">");
System.out.println();
}
sb.append("</xml>");
xmlResult = sb.toString();
return xmlResult;
}
//将xml转为map
public static Map<String, Object> parseXmlMap(String xml) throws DocumentException {
Document document = DocumentHelper.parseText(xml);
Element root = document.getRootElement();
List<Element> elementList = root.elements();
Map<String, Object> map = new HashMap();
Iterator var5 = elementList.iterator();
while(var5.hasNext()) {
Element e = (Element)var5.next();
map.put(e.getName(), e.getText());
}
return map;
}
}
发送请求需要推荐一个非常好用的工具，里面各种常用的工具都封装好了hutool，如果想直接复制代码使用也需要引入此工具的maven库
注意：此工具只支持JDK 1.7以上至此代码已经完成，有意见建议的都可以留言，后续会更新最完整最新版的PayPal支付，同时有需要的也可以看看博主的支付宝PC支付
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持谷谷点程序。
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