步骤：
- 导入maven依赖
<!--微信支付-->
<dependency>
<groupId>com.github.wxpay</groupId>
<artifactId>wxpay-sdk</artifactId>
<version>0.0.3</version>
</dependency>
- 微信支付参数配置
import com.github.wxpay.sdk.WXPayConfig; import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream; /**
* 微信支付配置(单例)
*/
public class WXConfigUtil implements WXPayConfig { private byte[] certData;
private static WXConfigUtil INSTANCE; public static final String APP_ID = "*****";//应用AppID
public static final String KEY = "******";//商户密钥
public static final String MCH_ID = "******";//商户号 public WXConfigUtil() throws Exception {
String certPath = WXConfigUtil.class.getClassLoader().getResource("").getPath();//从微信商户平台下载的安全证书存放的路径
File file = new File(certPath+ "apiclient_cert.p12");
InputStream certStream = new FileInputStream(file);
this.certData = new byte[(int) file.length()];
certStream.read(this.certData);
certStream.close();
} //双重检查加锁
public static WXConfigUtil getInstance() throws Exception {
if (INSTANCE == null) {
synchronized (WXConfigUtil.class) {
if (INSTANCE == null) {
INSTANCE = new WXConfigUtil();
}
}
}
return INSTANCE;
} @Override
public String getAppID() {
return APP_ID;
} //parnerid，商户号
@Override
public String getMchID() {
return MCH_ID;
} @Override
public String getKey() {
return KEY;
} @Override
public InputStream getCertStream() {
ByteArrayInputStream certBis = new ByteArrayInputStream(this.certData);
return certBis;
} @Override
public int getHttpConnectTimeoutMs() {
return 8000;
} @Override
public int getHttpReadTimeoutMs() {
return 10000;
}
}
- 业务层统一下单以及异步通知后的XML数据处理
import com.aone.app.common.wx.WXConfigUtil;
import com.aone.app.common.wx.WxCfg;
import com.aone.app.service.PayService;
import com.aone.app.service.WXAppPayService;
import com.github.wxpay.sdk.WXPay;
import com.github.wxpay.sdk.WXPayUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils; import java.util.HashMap;
import java.util.Map; @Service
public class WXAppPayServiceImpl implements WXAppPayService { private static final Logger logger = LoggerFactory.getLogger("WXAppPayServiceImpl");
@Autowired
private WxCfg wxCfg;
/**
* 调用官方SDK 获取预支付订单等参数
* @param type
* @param out_trade_no
* @param money
* @return
* @throws Exception
*/
@Override
public Map<String, String> dounifiedOrder(String type,String out_trade_no,String money) throws Exception {
Map<String, String> returnMap = new HashMap<>(); //支付参数
WXConfigUtil config = new WXConfigUtil();
WXPay wxpay = new WXPay(config);
//请求参数封装
Map<String, String> data = new HashMap<>();
data.put("appid", config.getAppID());
data.put("mch_id", config.getMchID());
data.put("nonce_str", WXPayUtil.generateNonceStr());
data.put("body", "订单支付");
data.put("out_trade_no", out_trade_no);
data.put("total_fee", "1");
data.put("spbill_create_ip", wxCfg.getIp()); //自己的服务器IP地址
data.put("notify_url", wxCfg.getAppNotifyUrl());//异步通知地址（请注意必须是外网）
data.put("trade_type", wxCfg.getAppType());//交易类型
data.put("attach", type);//附加数据，在查询API和支付通知中原样返回，该字段主要用于商户携带订单的自定义数据
String s = WXPayUtil.generateSignature(data, config.getKey()); //签名
data.put("sign", s);//签名 try {
//使用官方API请求预付订单
Map<String, String> response = wxpay.unifiedOrder(data);
System.out.println(response);
String returnCode = response.get("return_code"); //获取返回码
//若返回码为SUCCESS，则会返回一个result_code,再对该result_code进行判断
if (returnCode.equals("SUCCESS")) {
//主要返回以下5个参数(必须按照顺序，否则APP报错：-1)
String resultCode = response.get("result_code");
returnMap.put("appid", response.get("appid"));
returnMap.put("noncestr", response.get("nonce_str"));
if ("SUCCESS".equals(resultCode)) {//resultCode 为SUCCESS，才会返回prepay_id和trade_type
returnMap.put("package","Sign=WXPay");
returnMap.put("partnerid", response.get("mch_id"));
returnMap.put("prepayid", response.get("prepay_id"));
returnMap.put("timestamp", String.valueOf(System.currentTimeMillis() / 1000));//单位为秒 String sign = WXPayUtil.generateSignature(returnMap, config.getKey());// 二次签名
returnMap.put("sign",sign); //签名
returnMap.put("trade_type", response.get("trade_type"));//获取预支付交易回话标志
return returnMap;
} else {
//此时返回没有预付订单的数据
return returnMap;
}
} else {
return returnMap;
}
} catch (Exception e) {
System.out.println(e);
//系统等其他错误的时候
}
return returnMap;
} /**
*
* @param notifyData 异步通知后的XML数据
* @return
*/
@Override
public String payBack(String notifyData) {
WXConfigUtil config = null;
try {
config = new WXConfigUtil();
} catch (Exception e) {
e.printStackTrace();
}
WXPay wxpay = new WXPay(config);
String xmlBack = "";
Map<String, String> notifyMap = null;
try {
notifyMap = WXPayUtil.xmlToMap(notifyData); // 调用官方SDK转换成map类型数据
if (wxpay.isPayResultNotifySignatureValid(notifyMap)) {//验证签名是否有效，有效则进一步处理 String return_code = notifyMap.get("return_code");//状态
String out_trade_no = notifyMap.get("out_trade_no");//商户订单号
if (return_code.equals("SUCCESS")) {
if (out_trade_no != null) {
// 注意特殊情况：订单已经退款，但收到了支付结果成功的通知，不应把商户的订单状态从退款改成支付成功
// 注意特殊情况：微信服务端同样的通知可能会多次发送给商户系统，所以数据持久化之前需要检查是否已经处理过了，处理了直接返回成功标志
//业务数据持久化
System.err.println("支付成功"+"\n");
String attach = notifyMap.get("attach");//附加数据，用于区分是那张表订单
System.out.print("附加数据类型为：{}"+attach+"\n");
if(StringUtils.isEmpty(attach)){
logger.info("附加数据类型为：{}", attach);
}else{
//@TODO 预支付下单后回调的逻辑 }
logger.info("微信手机支付回调成功订单号:{}", out_trade_no);
xmlBack = "<xml>" + "<return_code><![CDATA[SUCCESS]]></return_code>" + "<return_msg><![CDATA[OK]]></return_msg>" + "</xml> ";
} else {
logger.info("微信手机支付回调失败订单号:{}", out_trade_no);
xmlBack = "<xml>" + "<return_code><![CDATA[FAIL]]></return_code>" + "<return_msg><![CDATA[报文为空]]></return_msg>" + "</xml> ";
}
}
return xmlBack;
} else {
// 签名错误，如果数据里没有sign字段，也认为是签名错误
//失败的数据要不要存储？
logger.error("手机支付回调通知签名错误");
xmlBack = "<xml>" + "<return_code><![CDATA[FAIL]]></return_code>" + "<return_msg><![CDATA[报文为空]]></return_msg>" + "</xml> ";
return xmlBack;
}
} catch (Exception e) {
logger.error("手机支付回调通知失败", e);
xmlBack = "<xml>" + "<return_code><![CDATA[FAIL]]></return_code>" + "<return_msg><![CDATA[报文为空]]></return_msg>" + "</xml> ";
}
return xmlBack;
}
}
- WXCfg中配置的是微信支付的回调地址以及交易类型
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component; /**
* 微信参数配置中心
*/
@Component
public class WxCfg { @Value("${wx.appType}")
private String appType;//App支付交易类型
@Value("${wx.appNotifyUrl}")
private String appNotifyUrl;//App回调地址
@Value("${wx.h5Type}")
private String h5Type;//H5支付交易类型
@Value("${wx.h5NotifyUrl}")
private String h5NotifyUrl;//H5回调地址
@Value("${wx.ip}")
private String ip;//服务器ip
@Value("${wx.redirect_url}")
private String redirect_url;//跳转地址 public String getAppNotifyUrl() {
return appNotifyUrl;
} public void setAppNotifyUrl(String appNotifyUrl) {
this.appNotifyUrl = appNotifyUrl;
} public String getH5NotifyUrl() {
return h5NotifyUrl;
} public void setH5NotifyUrl(String h5NotifyUrl) {
this.h5NotifyUrl = h5NotifyUrl;
} public String getAppType() {
return appType;
} public void setAppType(String appType) {
this.appType = appType;
} public String getH5Type() {
return h5Type;
} public void setH5Type(String h5Type) {
this.h5Type = h5Type;
} public String getIp() {
return ip;
} public void setIp(String ip) {
this.ip = ip;
} public String getRedirect_url() {
return redirect_url;
} public void setRedirect_url(String redirect_url) {
this.redirect_url = redirect_url;
}
}
- 控制层下单接口以及回调接口
import com.aone.app.service.WXAppPayService;
import io.swagger.annotations.Api;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.*; import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map; @RestController
@RequestMapping("pay")
@Api("App支付")
public class PayAppController { @Autowired
private WXAppPayService wxAppPayService; /**
*
* App支付统一下单
* @param out_trade_no 订单号
* @param total_fee 支付金额
* @param type 0:预约订单1:专家保证金2：即时咨询订单
* @return
* @throws Exception
*/
@PostMapping("order")
public Map<String, String> order(@RequestParam(value = "type") String type,@RequestParam(value = "out_trade_no") String out_trade_no,@RequestParam(value = "total_fee") String total_fee)throws Exception{
return wxAppPayService.dounifiedOrder(type,out_trade_no,total_fee);
} /**
* 微信支付异步结果通知
*/
@RequestMapping(value = "wxPayNotify", method = {RequestMethod.GET, RequestMethod.POST})
public String wxPayNotify(HttpServletRequest request, HttpServletResponse response) {
System.out.print("微信回调开始"+"\n");
String resXml = "";
try {
InputStream inputStream = request.getInputStream();
//将InputStream转换成xmlString
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
StringBuilder sb = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
} catch (IOException e) {
System.out.println(e.getMessage());
} finally {
try {
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
resXml = sb.toString();
String result = wxAppPayService.payBack(resXml);
System.out.print("微信回调结束"+"\n");
return result;
} catch (Exception e) {
System.out.println("微信手机支付失败:" + e.getMessage());
String result = "<xml>" + "<return_code><![CDATA[FAIL]]></return_code>" + "<return_msg><![CDATA[报文为空]]></return_msg>" + "</xml> ";
return result;
}
} }
- 下单封装的Map中封装参数服务器IP写死可能会报错，提供获取服务器IP工具类
import javax.servlet.http.HttpServletRequest; /**
* 获取服务器IP工具类
*/
public class IpAddr { public static String getIpAddr(HttpServletRequest request) {
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();
}
return ip;
} }
主要用于安卓APP微信支付，IOS微信支付可能是需要交钱，太贵了，所以IOS的微信支付提供外链接使用H5进行支付。