package com.dsh.app.util.pay.wechat;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import java.io.UnsupportedEncodingException;
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import java.net.URLEncoder;
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import java.util.*;
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/*
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'微信支付服务器签名支付请求请求类
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'============================================================================
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'api说明：
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'init(app_id, app_secret, partner_key, app_key);
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'初始化函数，默认给一些参数赋值，如cmdno,date等。
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'setKey(key_)'设置商户密钥
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'getLasterrCode(),获取最后错误号
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'GetToken();获取Token
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'getTokenReal();Token过期后实时获取Token
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'createMd5Sign(signParams);生成Md5签名
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'genPackage(packageParams);获取package包
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'createSHA1Sign(signParams);创建签名SHA1
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'sendPrepay(packageParams);提交预支付
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'getDebugInfo(),获取debug信息
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'============================================================================
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'*/
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public class RequestHandler {
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// /** Token获取网关地址地址 */
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// private String tokenUrl;
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// /** 预支付网关url地址 */
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// private String gateUrl;
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/** 查询支付通知网关URL */
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private String notifyUrl;
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/** 商户参数 */
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private String appid;
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private String appkey;
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private String partnerkey;
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private String appsecret;
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private String key;
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/** 请求的参数 */
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private SortedMap parameters;
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/** Token */
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private String Token;
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private String charset;
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/** debug信息 */
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private String debugInfo;
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private String last_errcode;
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private HttpServletRequest request;
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private HttpServletResponse response;
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/**
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* 初始构造函数。
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*
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* @return
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*/
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public RequestHandler(HttpServletRequest request,
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HttpServletResponse response) {
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this.last_errcode = "0";
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this.request = request;
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this.response = response;
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//this.charset = "GBK";
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this.charset = "UTF-8";
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this.parameters = new TreeMap();
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// 验证notify支付订单网关
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notifyUrl = "https://gw.tenpay.com/gateway/simpleverifynotifyid.xml";
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}
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/**
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* 初始化函数。
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*/
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public void init(String app_id, String app_secret, String partner_key) {
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this.last_errcode = "0";
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this.Token = "token_";
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this.debugInfo = "";
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this.appid = app_id;
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this.partnerkey = partner_key;
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this.appsecret = app_secret;
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this.key = partner_key;
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}
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public void init() {
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}
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/**
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* 获取最后错误号
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*/
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public String getLasterrCode() {
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return last_errcode;
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}
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// /**
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// *获取入口地址,不包含参数值
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// */
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// public String getGateUrl() {
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// return gateUrl;
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// }
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/**
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* 获取参数值
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*
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* @param parameter
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* 参数名称
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* @return String
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*/
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public String getParameter(String parameter) {
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String s = (String) this.parameters.get(parameter);
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return (null == s) ? "" : s;
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}
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//设置密钥
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public void setKey(String key) {
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this.partnerkey = key;
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}
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//设置微信密钥
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public void setAppKey(String key){
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this.appkey = key;
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}
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// 特殊字符处理
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public String UrlEncode(String src) throws UnsupportedEncodingException {
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return URLEncoder.encode(src, this.charset).replace("+", "%20");
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}
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// 获取package的签名包
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public String genPackage(SortedMap<String, String> packageParams)
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throws UnsupportedEncodingException {
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String sign = createSign(packageParams);
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StringBuffer sb = new StringBuffer();
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Set es = packageParams.entrySet();
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Iterator it = es.iterator();
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while (it.hasNext()) {
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Map.Entry entry = (Map.Entry) it.next();
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String k = (String) entry.getKey();
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String v = (String) entry.getValue();
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sb.append(k + "=" + UrlEncode(v) + "&");
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}
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// 去掉最后一个&
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String packageValue = sb.append("sign=" + sign).toString();
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// System.out.println("UrlEncode后 packageValue=" + packageValue);
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return packageValue;
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}
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/**
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* 创建md5摘要,规则是:按参数名称a-z排序,遇到空值的参数不参加签名。
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*/
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public String createSign(SortedMap<String, String> packageParams) {
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StringBuffer sb = new StringBuffer();
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Set es = packageParams.entrySet();
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Iterator it = es.iterator();
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while (it.hasNext()) {
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Map.Entry entry = (Map.Entry) it.next();
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String k = (String) entry.getKey();
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String v = (String) entry.getValue();
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if (null != v && !"".equals(v) && !"sign".equals(k)
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&& !"key".equals(k)) {
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sb.append(k + "=" + v + "&");
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}
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}
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sb.append("key=" + this.getKey());
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String sign = WXMD5Util.MD5Encode(sb.toString(), this.charset)
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.toUpperCase();
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return sign;
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}
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/**
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* 创建package签名
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*/
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public boolean createMd5Sign(String signParams) {
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StringBuffer sb = new StringBuffer();
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Set es = this.parameters.entrySet();
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Iterator it = es.iterator();
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while (it.hasNext()) {
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Map.Entry entry = (Map.Entry) it.next();
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String k = (String) entry.getKey();
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String v = (String) entry.getValue();
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if (!"sign".equals(k) && null != v && !"".equals(v)) {
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sb.append(k + "=" + v + "&");
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}
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}
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// 算出摘要
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String enc = getCharacterEncoding(this.request,
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this.response);
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String sign = WXMD5Util.MD5Encode(sb.toString(), enc).toLowerCase();
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String tenpaySign = this.getParameter("sign").toLowerCase();
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// debug信息
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this.setDebugInfo(sb.toString() + " => sign:" + sign + " tenpaySign:"
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+ tenpaySign);
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return tenpaySign.equals(sign);
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}
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//输出XML
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public String parseXML() {
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StringBuffer sb = new StringBuffer();
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sb.append("<xml>");
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Set es = this.parameters.entrySet();
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Iterator it = es.iterator();
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while(it.hasNext()) {
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Map.Entry entry = (Map.Entry)it.next();
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String k = (String)entry.getKey();
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String v = (String)entry.getValue();
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if(null != v && !"".equals(v) && !"appkey".equals(k)) {
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sb.append("<" + k +">" + getParameter(k) + "</" + k + ">\n");
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}
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}
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sb.append("</xml>");
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return sb.toString();
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}
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/**
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* 获取编码字符集
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* @param request
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* @param response
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* @return String
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*/
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public static String getCharacterEncoding(HttpServletRequest request,
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HttpServletResponse response) {
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if(null == request || null == response) {
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return "gbk";
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}
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String enc = request.getCharacterEncoding();
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if(null == enc || "".equals(enc)) {
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enc = response.getCharacterEncoding();
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}
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if(null == enc || "".equals(enc)) {
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enc = "gbk";
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}
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return enc;
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}
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/**
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* 设置debug信息
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*/
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protected void setDebugInfo(String debugInfo) {
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this.debugInfo = debugInfo;
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}
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public void setPartnerkey(String partnerkey) {
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this.partnerkey = partnerkey;
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}
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public String getDebugInfo() {
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return debugInfo;
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}
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public String getKey() {
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return key;
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}
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}
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