②准备好11个参数JSAPI支付方式
1 配置微信平台
①配置微信公众平台
登录微信公众平台=》公众号设置=》功能设置=》网页授权域名
②配置微信商家平台
①先去官方下载SDK，并导进项目中
2 后台代码的实现
JSAPI官方文档：
https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=9_1
①先去官方下载SDK，并导进项目中
地址：
https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=11_1
②准备好11个参数
appid：商家平台ID。在微信的平台上有
body：商品描述。
mch_id：商户ID。在微信的平台上有
nonce_str：随机字符串，UUID就好了。
openid：用户标识。因为这边是用户已经登录成功了。所以在session中就能拿到。
out_trade_no：商户订单号
spbill_create_ip：终端IP。这个可以从请求头中拿到
total_fee：支付金额。单位是分。
trade_type：交易类型。这里我填JSAPI
notify_url：通知地址。就是用户支付成功之后，微信访问你的哪个接口，跟你传递支付成功的相关信息。sign：签名。这个签名它是由上面的10个参数计算得出的。
③源码
sendPay类：
import java.io.IOException;
import java.io.InputStream;
import java.math.BigDecimal;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.http.auth.AUTH;
import org.hamcrest.core.Is;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import com.jc.util.wxPay.WXPayUtil;
import com.sun.xml.internal.fastinfoset.Encoder;
import controller.AuthUtil;
import net.sf.json.JSONObject;
@Controller
@RequestMapping("/pay")
public class sendPay {
/**
* @Description 微信浏览器内微信支付/公众号支付(JSAPI)
* @param request
* @param code
* @return Map
*/
@RequestMapping(value = "orders")
public @ResponseBody Map orders(HttpServletRequest request, HttpServletResponse response) {
try {
String openId = "用户的openid";
// 拼接统一下单地址参数
Map paraMap = new HashMap();
// 获取请求ip地址
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();
}
if (ip.indexOf(",") != -1) {
String[] ips = ip.split(",");
ip = ips[0].trim();
}
paraMap.put("appid", AuthUtil.APPID); // 商家平台ID
paraMap.put("body", "纯情小店铺-薯条"); // 商家名称-销售商品类目、String(128)
paraMap.put("mch_id", AuthUtil.MCHID); // 商户ID
paraMap.put("nonce_str", WXPayUtil.generateNonceStr()); // UUID
paraMap.put("openid", openId);
paraMap.put("out_trade_no", UUID.randomUUID().toString().replaceAll("-", ""));// 订单号,每次都不同
paraMap.put("spbill_create_ip", ip);
paraMap.put("total_fee", "1"); // 支付金额，单位分
paraMap.put("trade_type", "JSAPI"); // 支付类型
paraMap.put("notify_url", "用户支付完成后，你想微信调你的哪个接口");// 此路径是微信服务器调用支付结果通知路径随意写
String sign = WXPayUtil.generateSignature(paraMap, AuthUtil.PATERNERKEY);
paraMap.put("sign", sign);
String xml = WXPayUtil.mapToXml(paraMap);// 将所有参数(map)转xml格式
// 统一下单 https://api.mch.weixin.qq.com/pay/unifiedorder
String unifiedorder_url = "https://api.mch.weixin.qq.com/pay/unifiedorder";
System.out.println("xml为：" + xml);
// String xmlStr = HttpRequest.sendPost(unifiedorder_url,
// xml);//发送post请求"统一下单接口"返回预支付id:prepay_id
String xmlStr = HttpRequest.httpsRequest(unifiedorder_url, "POST", xml);
System.out.println("xmlStr为：" + xmlStr);
// 以下内容是返回前端页面的json数据
String prepay_id = "";// 预支付id
if (xmlStr.indexOf("SUCCESS") != -1) {
Map map = WXPayUtil.xmlToMap(xmlStr);
prepay_id = (String) map.get("prepay_id");
}
Map payMap = new HashMap();
payMap.put("appId", AuthUtil.APPID);
payMap.put("timeStamp", WXPayUtil.getCurrentTimestamp() + "");
payMap.put("nonceStr", WXPayUtil.generateNonceStr());
payMap.put("signType", "MD5");
payMap.put("package", "prepay_id=" + prepay_id);
String paySign = WXPayUtil.generateSignature(payMap, AuthUtil.PATERNERKEY);
payMap.put("paySign", paySign);
//将这个6个参数传给前端
return payMap;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* @Title: callBack
* @Description: 支付完成的回调函数
* @param:
* @return:
*/
@RequestMapping("/notify")
public String callBack(HttpServletRequest request, HttpServletResponse response) {
// System.out.println("微信支付成功,微信发送的callback信息,请注意修改订单信息");
InputStream is = null;
try {
is = request.getInputStream();// 获取请求的流信息(这里是微信发的xml格式所有只能使用流来读)
String xml = WXPayUtil.InputStream2String(is);
Map notifyMap = WXPayUtil.xmlToMap(xml);// 将微信发的xml转map
System.out.println("微信返回给回调函数的信息为："+xml);
if (notifyMap.get("result_code").equals("SUCCESS")) {
String ordersSn = notifyMap.get("out_trade_no");// 商户订单号
String amountpaid = notifyMap.get("total_fee");// 实际支付的订单金额:单位 分
BigDecimal amountPay = (new BigDecimal(amountpaid).pide(new BigDecimal("100"))).setScale(2);// 将分转换成元-实际支付金额:元
/*
* 以下是自己的业务处理------仅做参考 更新order对应字段/已支付金额/状态码
*/
System.out.println("===notify===回调方法已经被调！！！");
}
// 告诉微信服务器收到信息了，不要在调用回调action了========这里很重要回复微信服务器信息用流发送一个xml即可
response.getWriter().write(" HttpRequest类：
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;
import javax.net.ssl.HttpsURLConnection;
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;
System.out.println(urlNameString);
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> 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(), "UTF-8"));
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;
}
/**
* post请求并得到返回结果
*
* @param requestUrl
* @param requestMethod
* @param output
* @return
*/
public static String httpsRequest(String requestUrl, String requestMethod, String output) {
try {
URL url = new URL(requestUrl);
HttpsURLConnection connection = (HttpsURLConnection) url.openConnection();
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setUseCaches(false);
connection.setRequestMethod(requestMethod);
if (null != output) {
OutputStream outputStream = connection.getOutputStream();
outputStream.write(output.getBytes("UTF-8"));
outputStream.close();
}
// 从输入流读取返回内容
InputStream inputStream = connection.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);
}
bufferedReader.close();
inputStreamReader.close();
inputStream.close();
inputStream = null;
connection.disconnect();
return buffer.toString();
} catch (Exception ex) {
ex.printStackTrace();
}
return "";
}
} AuthUtil类
import java.io.IOException;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import net.sf.json.JSONObject;
public class AuthUtil {
public static final String APPID = "平台ID";
public static final String APPSECRET = "平台密钥";
public static final String MCHID = "商家ID";
public static final String PATERNERKEY = "商家密钥";
public static JSONObject doGetJson(String url) throws ClientProtocolException, IOException {
JSONObject jsonObject = null;
// 首先初始化HttpClient对象
DefaultHttpClient client = new DefaultHttpClient();
// 通过get方式进行提交
HttpGet httpGet = new HttpGet(url);
// 通过HTTPclient的execute方法进行发送请求
HttpResponse response = client.execute(httpGet);
// 从response里面拿自己想要的结果
HttpEntity entity = response.getEntity();
if (entity != null) {
String result = EntityUtils.toString(entity, "UTF-8");
jsonObject = jsonObject.fromObject(result);
}
// 把链接释放掉
httpGet.releaseConnection();
return jsonObject;
}
}2.3 前端的实现
这是只用一个jsp页面来做测试
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
微信支付JSP
虽然第一次看官方文档很乱，信息量很多，但仔细总结一下，其实就下面这点流程而已。
再记录点，以防有用：
url urlencode
public static String inputStream2String(InputStream inStream, String encoding){
String result = null;
ByteArrayOutputStream outStream = null;
try {
if(inStream != null){
outStream = new ByteArrayOutputStream();
byte[] tempBytes = new byte[1024];
int count = 0;
while((count = inStream.read(tempBytes)) != -1){
outStream.write(tempBytes, 0, count);
}
tempBytes = null;
outStream.flush();
result = new String(outStream.toByteArray(), encoding);
outStream.close();
}
} catch (Exception e) {
result = null;
}
return result;
}转载：
https://blog.csdn.net/daotiao0199/article/details/85284038
https://blog.csdn.net/javaYouCome/article/details/79473743
页面更新：2024-03-11
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