微信APP支付-Java后台实现
来源:互联网 发布:linux 电池驱动 编辑:程序博客网 时间:2024/05/16 16:22
1 注册微信开放者平台
开发者平台地址:https://open.weixin.qq.com/
2 成为开发者
3 上传APP
4 开通微信支付功能
5 设置商户号信息
APP 支付能力开通后,微信会给你一个商户号,用户和密码等信息。需要验证商户信息,还需要设置一个加密的密钥字段,这里就不一一细说了。
6 开发接口
微信APP支付接口,是很好调试的,(不像微信公众平台,需要80端口),可以直接在本地就可以进行调试。 具体业务就不细说,直接看代码就懂了。
1 基础信息配置
package com.qx.client.common.pay.weichart.config;import java.util.Properties;import com.tom.util.properties.PropertiesUtil;import com.tom.util.system.RSystemConfig;public class WeiChartConfig { /** * 预支付请求地址 */ public static final String PrepayUrl = "https://api.mch.weixin.qq.com/pay/unifiedorder"; /** * 查询订单地址 */ public static final String OrderUrl = "https://api.mch.weixin.qq.com/pay/orderquery"; /** * 关闭订单地址 */ public static final String CloseOrderUrl = "https://api.mch.weixin.qq.com/pay/closeorder"; /** * 申请退款地址 */ public static final String RefundUrl = "https://api.mch.weixin.qq.com/secapi/pay/refund"; /** * 查询退款地址 */ public static final String RefundQueryUrl = "https://api.mch.weixin.qq.com/pay/refundquery"; /** * 下载账单地址 */ public static final String DownloadBillUrl = "https://api.mch.weixin.qq.com/pay/downloadbill"; /** * 商户APPID */ public static final String AppId = "wxabcdefghjjsdfsd"; /** * 商户账户 获取支付能力后,从邮件中得到 */ public static final String MchId = "13000000000001"; /** * 商户秘钥 32位,在微信商户平台中设置 */ public static final String AppSercret = "qx12345645778679789"; /** * 服务器异步通知页面路径 */ public static String notify_url = getProperties().getProperty("notify_url"); /** * 页面跳转同步通知页面路径 */ public static String return_url = getProperties().getProperty("return_url"); /** * 退款通知地址 */ public static String refund_notify_url = getProperties().getProperty("refund_notify_url"); /** * 退款需要证书文件,证书文件的地址 */ public static String refund_file_path = getProperties().getProperty("refund_file_path"); /** * 商品名称 */ public static String subject = getProperties().getProperty("subject"); /** * 商品描述 */ public static String body = getProperties().getProperty("body"); private static Properties properties; public static synchronized Properties getProperties(){ if(properties == null){ String path = System.getenv(RSystemConfig.KEY_WEB_HOME_CONF) + "/weichart.properties"; properties = PropertiesUtil.getInstance().getProperties(path); } return properties; }}
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2 http /https请求的工具类
其中有需要证书的,也有不需要证书的。
证书是在需要退款接口的时候需要使用,直接把证书放在服务器上,然后传路径
package com.qx.client.common.pay.weichart.util.httpClient;import java.io.BufferedReader;import java.io.File;import java.io.FileInputStream;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStreamWriter;import java.net.MalformedURLException;import java.net.URL;import java.net.URLConnection;import java.security.KeyStore;import java.util.Map;import javax.net.ssl.SSLContext;import org.apache.commons.httpclient.HttpClient;import org.apache.commons.httpclient.methods.PostMethod;import org.apache.commons.httpclient.methods.StringRequestEntity;import org.apache.commons.httpclient.params.HttpMethodParams;import org.apache.http.HttpEntity;import org.apache.http.client.methods.CloseableHttpResponse;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;public class HttpClientUtil{ public static String post(String url, Map<String, String> headMap, Map<String, String> params){ try{ HttpClient httpclient = new HttpClient(); httpclient.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET, "UTF-8"); PostMethod httpPost = new PostMethod(url); if(null != headMap){ for(String key : headMap.keySet()){ httpPost.setRequestHeader(key, headMap.get(key)); } } if(null != params){ for(String pkey : params.keySet()){ httpPost.addParameter(pkey, params.get(pkey)); } } httpclient.executeMethod(httpPost); BufferedReader reader = new BufferedReader(new InputStreamReader(httpPost.getResponseBodyAsStream())); StringBuffer stringBuffer = new StringBuffer(); String str = ""; while((str = reader.readLine()) != null){ stringBuffer.append(str); } reader.close(); return stringBuffer.toString(); }catch(Exception e){ e.printStackTrace(); } return null; } public static String postHttplient(String url, String xmlInfo){ try{ HttpClient httpclient = new HttpClient(); httpclient.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET, "UTF-8"); PostMethod httpPost = new PostMethod(url); httpPost.setRequestEntity(new StringRequestEntity(xmlInfo)); httpclient.executeMethod(httpPost); BufferedReader reader = new BufferedReader(new InputStreamReader(httpPost.getResponseBodyAsStream())); StringBuffer stringBuffer = new StringBuffer(); String str = ""; while((str = reader.readLine()) != null){ stringBuffer.append(str); } reader.close(); return stringBuffer.toString(); }catch(Exception e){ e.printStackTrace(); } return null; } /** * 需要加密执行的 * @param url * @param xmlInfo * @return * @throws Exception */ public static String postHttplientNeedSSL(String url, String xmlInfo, String cretPath, String mrchId) throws Exception{ //选择初始化密钥文件格式 KeyStore keyStore = KeyStore.getInstance("PKCS12"); //得到密钥文件流 FileInputStream instream = new FileInputStream(new File(cretPath)); try{ //用商户的ID 来解读文件 keyStore.load(instream, mrchId.toCharArray()); }finally{ instream.close(); } //用商户的ID 来加载 SSLContext sslcontext = SSLContexts.custom().loadKeyMaterial(keyStore, mrchId.toCharArray()).build(); // Allow TLSv1 protocol only SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslcontext, new String[] { "TLSv1" }, null, SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER); //用最新的httpclient 加载密钥 CloseableHttpClient httpclient = HttpClients.custom().setSSLSocketFactory(sslsf).build(); StringBuffer ret = new StringBuffer(); try{ HttpPost httpPost = new HttpPost(url); httpPost.setEntity(new StringEntity(xmlInfo)); CloseableHttpResponse response = httpclient.execute(httpPost); try{ HttpEntity entity = response.getEntity(); if(entity != null){ BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(entity.getContent())); String text; while((text = bufferedReader.readLine()) != null){ ret.append(text); } } EntityUtils.consume(entity); }finally{ response.close(); } }finally{ httpclient.close(); } return ret.toString(); } public static String postHtpps(String urlStr, String xmlInfo){ try{ URL url = new URL(urlStr); URLConnection con = url.openConnection(); con.setDoOutput(true); con.setRequestProperty("Pragma:", "no-cache"); con.setRequestProperty("Cache-Control", "no-cache"); con.setRequestProperty("Content-Type", "text/xml;charset=utf-8"); OutputStreamWriter out = new OutputStreamWriter(con.getOutputStream(), "utf-8"); out.write(xmlInfo); out.flush(); out.close(); BufferedReader br = new BufferedReader(new InputStreamReader(con.getInputStream())); StringBuffer lines = new StringBuffer(); String line = ""; for(line = br.readLine(); line != null; line = br.readLine()){ lines.append(line); } return lines.toString(); }catch(MalformedURLException e){ e.printStackTrace(); }catch(IOException e){ e.printStackTrace(); } return null; }}
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4 调用API接口
其中包含 XML生成,和解析XML,请求参数字典排序,拼接密钥,MD5加密
package com.qx.client.common.pay.weichart.util;import java.net.InetAddress;import java.net.UnknownHostException;import java.util.Arrays;import java.util.Date;import java.util.HashMap;import java.util.Map;import java.util.Random;import java.util.Set;import org.mobj.com.encoding.RMd5;import org.mobj.com.xml.FXmlDocument;import org.mobj.com.xml.FXmlNode;import org.mobj.com.xml.FXmlNodes;import com.qx.client.common.pay.weichart.config.WeiChartConfig;import com.qx.client.common.pay.weichart.util.httpClient.HttpClientUtil;public class WeiChartUtil{ /** * 返回状态码 */ public static final String ReturnCode = "return_code"; /** * 返回信息 */ public static final String ReturnMsg = "return_msg"; /** * 业务结果 */ public static final String ResultCode = "result_code"; /** * 预支付交易会话标识 */ public static final String PrepayId = "prepay_id"; /** * 得到微信预付单的返回ID * @param orderId 商户自己的订单号 * @param totalFee 总金额 (分) * @return */ public static Map<String, String> getPreyId(String orderId, String totalFee){ Map<String, String> reqMap = new HashMap<String, String>(); reqMap.put("appid", WeiChartConfig.AppId); reqMap.put("mch_id", WeiChartConfig.MchId); reqMap.put("nonce_str", getRandomString()); reqMap.put("body", WeiChartConfig.body); //reqMap.put("detail", WeiChartConfig.subject); //非必填 //reqMap.put("attach", "附加数据"); //非必填 reqMap.put("out_trade_no", orderId); //商户系统内部的订单号, reqMap.put("total_fee", totalFee); //订单总金额,单位为分 reqMap.put("spbill_create_ip", getHostIp()); //用户端实际ip // reqMap.put("time_start", "172.16.40.18"); //交易起始时间 非必填 // reqMap.put("time_expire", "172.16.40.18"); //交易结束时间 非必填 // reqMap.put("goods_tag", "172.16.40.18"); //商品标记 非必填 reqMap.put("notify_url", WeiChartConfig.notify_url); //通知地址 reqMap.put("trade_type", "APP"); //交易类型 //reqMap.put("limit_pay", "no_credit"); //指定支付方式,no_credit 指定不能使用信用卡支 非必填 reqMap.put("sign", getSign(reqMap)); String reqStr = creatXml(reqMap); String retStr = HttpClientUtil.postHttplient(WeiChartConfig.PrepayUrl, reqStr); return getInfoByXml(retStr); } /** * 关闭订单 * @param orderId 商户自己的订单号 * @return */ public static Map<String, String> closeOrder(String orderId){ Map<String, String> reqMap = new HashMap<String, String>(); reqMap.put("appid", WeiChartConfig.AppId); reqMap.put("mch_id", WeiChartConfig.MchId); reqMap.put("nonce_str", getRandomString()); reqMap.put("out_trade_no", orderId); //商户系统内部的订单号, reqMap.put("sign", getSign(reqMap)); String reqStr = creatXml(reqMap); String retStr = HttpClientUtil.postHttplient(WeiChartConfig.CloseOrderUrl, reqStr); return getInfoByXml(retStr); } /** * 查询订单 * @param orderId 商户自己的订单号 * @return */ public static String getOrder(String orderId){ Map<String, String> reqMap = new HashMap<String, String>(); reqMap.put("appid", WeiChartConfig.AppId); reqMap.put("mch_id", WeiChartConfig.MchId); reqMap.put("nonce_str", getRandomString()); reqMap.put("out_trade_no", orderId); //商户系统内部的订单号, reqMap.put("sign", getSign(reqMap)); String reqStr = creatXml(reqMap); String retStr = HttpClientUtil.postHttplient(WeiChartConfig.OrderUrl, reqStr); return retStr; } /** * 退款 * @param orderId 商户订单号 * @param refundId 退款单号 * @param totralFee 总金额(分) * @param refundFee 退款金额(分) * @param opUserId 操作员ID * @return */ public static Map<String, String> refundWei(String orderId,String refundId,String totralFee,String refundFee,String opUserId){ Map<String, String> reqMap = new HashMap<String, String>(); reqMap.put("appid", WeiChartConfig.AppId); reqMap.put("mch_id", WeiChartConfig.MchId); reqMap.put("nonce_str", getRandomString()); reqMap.put("out_trade_no", orderId); //商户系统内部的订单号, reqMap.put("out_refund_no", refundId); //商户退款单号 reqMap.put("total_fee", totralFee); //总金额 reqMap.put("refund_fee", refundFee); //退款金额 reqMap.put("op_user_id", opUserId); //操作员 reqMap.put("sign", getSign(reqMap)); String reqStr = creatXml(reqMap); String retStr = ""; try{ retStr = HttpClientUtil.postHttplientNeedSSL(WeiChartConfig.RefundUrl, reqStr, WeiChartConfig.refund_file_path, WeiChartConfig.MchId); }catch(Exception e){ e.printStackTrace(); return null; } return getInfoByXml(retStr); } /** * 退款查询 * @param refundId 退款单号 * @return */ public static Map<String, String> getRefundWeiInfo(String refundId){ Map<String, String> reqMap = new HashMap<String, String>(); reqMap.put("appid", WeiChartConfig.AppId); reqMap.put("mch_id", WeiChartConfig.MchId); reqMap.put("nonce_str", getRandomString()); reqMap.put("out_refund_no", refundId); //商户退款单号 reqMap.put("sign", getSign(reqMap)); String reqStr = creatXml(reqMap); String retStr = HttpClientUtil.postHttplient(WeiChartConfig.RefundQueryUrl, reqStr); return getInfoByXml(retStr); } /** * 传入map 生成头为XML的xml字符串,例:<xml><key>123</key></xml> * @param reqMap * @return */ public static String creatXml(Map<String, String> reqMap){ Set<String> set = reqMap.keySet(); FXmlNode rootXml = new FXmlNode(); rootXml.setName("xml"); for(String key : set){ rootXml.createNode(key, reqMap.get(key)); } return rootXml.xml().toString(); } /** * 得到加密值 * @param map * @return */ public static String getSign(Map<String, String> map){ String[] keys = map.keySet().toArray(new String[0]); Arrays.sort(keys); StringBuffer reqStr = new StringBuffer(); for(String key : keys){ String v = map.get(key); if(v != null && !v.equals("")){ reqStr.append(key).append("=").append(v).append("&"); } } reqStr.append("key").append("=").append(WeiChartConfig.AppSercret); //MD5加密 return RMd5.encode(reqStr.toString()).toUpperCase(); } /** * 得到10 位的时间戳 * 如果在JAVA上转换为时间要在后面补上三个0 * @return */ public static String getTenTimes(){ String t = new Date().getTime()+""; t = t.substring(0, t.length()-3); return t; } /** * 得到随机字符串 * @param length * @return */ public static String getRandomString(){ int length = 32; String str = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"; Random random = new Random(); StringBuffer sb = new StringBuffer(); for(int i = 0; i < length; ++i){ int number = random.nextInt(62);//[0,62) sb.append(str.charAt(number)); } return sb.toString(); } /** * 得到本地机器的IP * @return */ private static String getHostIp(){ String ip = ""; try{ ip = InetAddress.getLocalHost().getHostAddress(); }catch(UnknownHostException e){ e.printStackTrace(); } return ip; } /** * 将XML转换为Map 验证加密算法 然后返回 * @param xml * @return */ public static Map<String, String> getInfoByXml(String xml){ try{ FXmlDocument xdoc = new FXmlDocument(); FXmlNode nodeRoot = xdoc.formatStringToXml(xml); FXmlNodes allNodes = nodeRoot.allNodes(); Map<String, String> map = new HashMap<String, String>(); for(FXmlNode fXmlNode : allNodes){ map.put(fXmlNode.name(), fXmlNode.text()); } //对返回结果做校验.去除sign 字段再去加密 String retSign = map.get("sign"); map.remove("sign"); String rightSing = getSign(map); if(rightSing.equals(retSign)){ return map; } }catch(Exception e){ return null; } return null; } /** * 将金额转换成分 * @param fee 元格式的 * @return 分 */ public static String changeToFen(Double fee){ String priceStr = ""; if(fee != null){ int p = (int)(fee * 100); //价格变为分 priceStr = Integer.toString(p); } return priceStr; }}
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在微信支付的调试过程中,发现了一个困扰了很长时间的BUG,或者说是一个问题。
就是微信请求预支付的时候如果传了中文,就是body中给的是中文,就会报body不是UTF-8格式。如果强行对字段进行编码,又会报 加密错误。
但是这不是最主要的让人困扰的地方,最让我烦恼的是,我用本地的JDK调试的时候,它是OK 的。 但是用TOMCAT 部署的时候 却一直都不行
在网上有很多的说法,有的说,对body 进行编码转换UTF-8,有的说对整个请求的XML,进行编码。
还有的说编码格式用统一的。iso900…等等,巴拉巴拉的。。
反正我都不行。
最后在大神的帮助下,慢慢梳理,对发送请求的post方法上面想办法。
然后就是下面的 这句关键
public static String postHtpps(String urlStr, String xmlInfo){ try{ URL url = new URL(urlStr); URLConnection con = url.openConnection(); con.setDoOutput(true); con.setRequestProperty("Pragma:", "no-cache"); con.setRequestProperty("Cache-Control", "no-cache"); con.setRequestProperty("Content-Type", "text/xml;charset=utf-8"); //在输入流里面进行转码,是最重要的 OutputStreamWriter out = new OutputStreamWriter(con.getOutputStream(), "utf-8"); out.write(xmlInfo); out.flush(); out.close(); BufferedReader br = new BufferedReader(new InputStreamReader(con.getInputStream())); StringBuffer lines = new StringBuffer(); String line = ""; for(line = br.readLine(); line != null; line = br.readLine()){ lines.append(line); } return lines.toString(); }catch(MalformedURLException e){ e.printStackTrace(); }catch(IOException e){ e.printStackTrace(); } return null; }}
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