微信H5支付开发(maven仓库版）

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官方文档：https://pay.weixin.qq.com/wiki/doc/api/H5.php?chapter=15_1

开发之前确认开通了H5支付功能

一、安装微信sdk

二、创建config类

package com.xiuchefang.config;import com.github.wxpay.sdk.WXPayConfig;import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;/**
* Created by 15117 on 2018/11/27.
*/
public class XCFWXPayConfig implements WXPayConfig { private byte[] certData; public XCFWXPayConfig() throws Exception {
String certPath = "***";
File file = new File(certPath);
InputStream stream = new FileInputStream(file);
this.certData = new byte[(int)file.length()];
stream.read(this.certData);
stream.close();
} @Override
public String getAppID() {
return "***";
} @Override
public String getMchID() {
return "***";
} @Override
public String getKey() {
return "***";
} @Override
public InputStream getCertStream() {
return new ByteArrayInputStream(this.certData);
} @Override
public int getHttpConnectTimeoutMs() {
return 8000;
} @Override
public int getHttpReadTimeoutMs() {
return 10000;
}
}

三、调用微信支付接口下单

用户ip获取

（1）微信用户ip获取指引：https://pay.weixin.qq.com/wiki/doc/api/H5.php?chapter=15_5

（2）代码获取ip指引：https://www.cnblogs.com/SongG-blogs/p/9083512.html

*注意抽象方法作用域

支付签名错误排产方法

1、确认公众号的appSecret和商户号的API密钥没有搞混。

2、重置商户API密钥（注意项目中记得更新api密钥）

3、确认公众号授权的域名和目录是正确的

针对redirect_url处理

前台进行页面跳转

支付成功之后处理，微信请求notify_url

@Override
public synchronized void payNotify(HttpServletRequest request, HttpServletResponse response) { System.out.println("微信支付回调");
try {
String resXml = "";
XCFWXPayConfig xcfwxPayConfig = new XCFWXPayConfig();
WXPay wxPay = new WXPay(xcfwxPayConfig); InputStream inStream = request.getInputStream();
ByteArrayOutputStream outSteam = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int len = 0;
while ((len = inStream.read(buffer)) != -1) {
outSteam.write(buffer, 0, len);
}
outSteam.close();
inStream.close();
String result = new String(outSteam.toByteArray(), "utf-8");// 获取微信调用我们notify_url的返回信息
Map<String, String> map = WXPayUtil.xmlToMap(result); if (wxPay.isPayResultNotifySignatureValid(map)) {
System.out.println("微信支付-签名验证成功");
resXml = "<xml>" + "<return_code><![CDATA[SUCCESS]]></return_code>"
+ "<return_msg><![CDATA[OK]]></return_msg>" + "</xml> ";
//业务处理开始 //业务处理结束
}
BufferedOutputStream out = new BufferedOutputStream(response.getOutputStream());
out.write(resXml.getBytes());
out.flush();
out.close();
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}