微信支付 JAVA实现
微信支付接口文档2.7里的demo实在是看不下去了，错误百出，到网上搜了半天，全部都是把官方文档下下来让你下载，还扣你积分，操蛋。。。
微信支付JAVA 接口
首先下载官方demo，虽然很多有问题，但是很多工具类是可以用的
附上地址：https://mp.weixin.qq.com/paymch/readtemplate?t=mp/business/course2_tmpl（别上人家那下还费积分）
1.请求前的拼包
// api支付拼包------------------------------------------------------------------------------
RequestHandler reqHandler = new RequestHandler(request, response);
// TenpayHttpClient httpClient = new TenpayHttpClient();
// TreeMap outParams = new TreeMap();
// 初始化
reqHandler.init();
reqHandler.init(APP_ID,APP_SECRET, APP_KEY,PARTNER_KEY);
// 当前时间 yyyyMMddHHmmss
String currTime = TenpayUtil.getCurrTime();
// 8位日期
String strTime = currTime.substring(8, currTime.length());
// 四位随机数
String strRandom = TenpayUtil.buildRandom(4) + "";
// 10位序列号,可以自行调整。
String strReq = strTime + strRandom;
// 订单号，此处用时间加随机数生成，商户根据自己情况调整，只要保持全局唯一就行
String out_trade_no = strReq;
// 设置package订单参数
SortedMap packageParams = new TreeMap();
packageParams.put("bank_type", "WX"); // 支付类型
packageParams.put("body", "商品名称"); // 商品描述
packageParams.put("fee_type", "1"); // 银行币种
packageParams.put("input_charset", "UTF-8"); // 字符集
packageParams.put("notify_url", "通知地址,接收交易结果，并进行业务处理,例如:http://abc.com/buy/buy.do"); // 通知地址
packageParams.put("out_trade_no", out_trade_no); // 商户订单号
packageParams.put("partner", PARTNER_ID); // 设置商户号
packageParams.put("total_fee", "交易金额"); // 商品总金额,以分为单位
packageParams.put("spbill_create_ip", request.getRemoteAddr()); // 订单生成的机器IP，指用户浏览器端IP
// 获取package包
String packageValue = reqHandler.genPackage(packageParams);
String noncestr = Sha1Util.getNonceStr();
String timestamp = Sha1Util.getTimeStamp();
// 设置支付参数
SortedMap signParams = new TreeMap();
signParams.put("appid", appid);
signParams.put("noncestr", noncestr);
signParams.put("package", packageValue);
signParams.put("timestamp", timestamp);
signParams.put("appkey", appkey);
// 生成支付签名，要采用URLENCODER的原始值进行SHA1算法！
String sign = Sha1Util.createSHA1Sign(signParams);
// 增加非参与签名的额外参数
signParams.put("paySign", sign);
signParams.put("signType", "SHA1");
// ------------------------------------微信js
// api支付拼包结束------------------------------------
// --------------------------------本地系统生成订单-------------------------------------
//
// --------------------------------生成完成---------------------------------------------
request.setAttribute("appid", appid);
request.setAttribute("timestamp", timestamp);
request.setAttribute("noncestr", noncestr);
request.setAttribute("package", packageValue);
request.setAttribute("paysign", sign);
request.setAttribute("czje", czje);
英文全大写带下划线的，各位申请微信支付的时候都会给你的。
注意：微信demo里面RequestHandler 在设置商户key和appkey有点问题，ResponseHandler连postData都没获取到，下面把我修正后的贴出来做参考(注：其它java类没什么问题)
RequestHandler:
package com.zk.common.wxpay;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.SortedMap;
import java.util.TreeMap;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.zk.common.wxpay.util.MD5Util;
import com.zk.common.wxpay.util.TenpayUtil;
/*
'微信支付服务器签名支付请求请求类
'============================================================================
'api说明：
'init(app_id, app_secret, partner_key, app_key);
'初始化函数，默认给一些参数赋值，如cmdno,date等。
'setKey(key_)'设置商户密钥
'getLasterrCode(),获取最后错误号
'GetToken();获取Token
'getTokenReal();Token过期后实时获取Token
'createMd5Sign(signParams);生成Md5签名
'genPackage(packageParams);获取package包
'createSHA1Sign(signParams);创建签名SHA1
'sendPrepay(packageParams);提交预支付
'getDebugInfo(),获取debug信息
'============================================================================
'*/
public class RequestHandler {
/** Token获取网关地址地址 */
private String tokenUrl;
/** 预支付网关url地址 */
private String gateUrl;
/** 查询支付通知网关URL */
private String notifyUrl;
/** 商户参数 */
private String appid;
private String appkey;
private String partnerkey;
private String appsecret;
private String key;
/** 请求的参数 */
private SortedMap parameters;
/** Token */
private String Token;
private String charset;
/** debug信息 */
private String debugInfo;
private String last_errcode;
private HttpServletRequest request;
private HttpServletResponse response;
/**
* 初始构造函数。
*
* @return
*/
public RequestHandler(HttpServletRequest request,
HttpServletResponse response) {
this.last_errcode = "0";
this.request = request;
this.response = response;
this.charset = "GBK";
this.parameters = new TreeMap();
// 验证notify支付订单网关
notifyUrl = "https://gw.tenpay.com/gateway/simpleverifynotifyid.xml";
}
/**
* 初始化函数。
*/
public void init(String app_id, String app_secret, String app_key,
String partner_key) {
this.last_errcode = "0";
this.Token = "token_";
this.debugInfo = "";
this.appkey = app_key;
this.appid = app_id;
this.partnerkey = partner_key;
this.key = partner_key;//原demo没有，手动加上
this.appsecret = app_secret;
}
public void init() {
}
/**
* 获取最后错误号
*/
public String getLasterrCode() {
return last_errcode;
}
/**
*获取入口地址,不包含参数值
*/
public String getGateUrl() {
return gateUrl;
}
/**
* 获取参数值
*
* @param parameter
* 参数名称
* @return String
*/
public String getParameter(String parameter) {
String s = (String) this.parameters.get(parameter);
return (null == s) ? "" : s;
}
//设置密钥
public void setKey(String key) {
this.partnerkey = key;
}
//设置微信密钥
public void setAppKey(String key){
this.appkey = key;
}
// 特殊字符处理
public String UrlEncode(String src) throws UnsupportedEncodingException {
return URLEncoder.encode(src, this.charset).replace("+", "%20");
}
// 获取package的签名包
public String genPackage(SortedMap packageParams)
throws UnsupportedEncodingException {
String sign = createSign(packageParams);
StringBuffer sb = new StringBuffer();
Set es = packageParams.entrySet();
Iterator it = es.iterator();
while (it.hasNext()) {
Map.Entry entry = (Map.Entry) it.next();
String k = (String) entry.getKey();
String v = (String) entry.getValue();
sb.append(k + "=" + UrlEncode(v) + "&");
}
// 去掉最后一个&
String packageValue = sb.append("sign=" + sign).toString();
System.out.println("packageValue=" + packageValue);
return packageValue;
}
/**
* 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。
*/
public String createSign(SortedMap packageParams) {
StringBuffer sb = new StringBuffer();
Set es = packageParams.entrySet();
Iterator it = es.iterator();
while (it.hasNext()) {
Map.Entry entry = (Map.Entry) it.next();
String k = (String) entry.getKey();
String v = (String) entry.getValue();
if (null != v && !"".equals(v) && !"sign".equals(k)
&& !"key".equals(k)) {
sb.append(k + "=" + v + "&");
}
}
sb.append("key=" + this.getKey());
System.out.println("md5 sb:" + sb);
String sign = MD5Util.MD5Encode(sb.toString(), this.charset)
.toUpperCase();
return sign;
}
/**
* 创建package签名
*/
public boolean createMd5Sign(String signParams) {
StringBuffer sb = new StringBuffer();
Set es = this.parameters.entrySet();
Iterator it = es.iterator();
while (it.hasNext()) {
Map.Entry entry = (Map.Entry) it.next();
String k = (String) entry.getKey();
String v = (String) entry.getValue();
if (!"sign".equals(k) && null != v && !"".equals(v)) {
sb.append(k + "=" + v + "&");
}
}
// 算出摘要
String enc = TenpayUtil.getCharacterEncoding(this.request,
this.response);
String sign = MD5Util.MD5Encode(sb.toString(), enc).toLowerCase();
String tenpaySign = this.getParameter("sign").toLowerCase();
// debug信息
this.setDebugInfo(sb.toString() + " => sign:" + sign + " tenpaySign:"
+ tenpaySign);
return tenpaySign.equals(sign);
}
//输出XML
public String parseXML() {
StringBuffer sb = new StringBuffer();
sb.append("");
Set es = this.parameters.entrySet();
Iterator it = es.iterator();
while(it.hasNext()) {
Map.Entry entry = (Map.Entry)it.next();
String k = (String)entry.getKey();
String v = (String)entry.getValue();
if(null != v && !"".equals(v) && !"appkey".equals(k)) {
sb.append("<" + k +">" + getParameter(k) + "\n");
}
}
sb.append(" ");
return sb.toString();
}
/**
* 设置debug信息
*/
protected void setDebugInfo(String debugInfo) {
this.debugInfo = debugInfo;
}
public void setPartnerkey(String partnerkey) {
this.partnerkey = partnerkey;
}
public String getDebugInfo() {
return debugInfo;
}
public String getKey() {
return key;
}
}
ResponseHandler:
package com.zk.common.wxpay;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.io.Reader;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.SortedMap;
import java.util.TreeMap;
import com.zk.common.Parameters;
import com.zk.common.wxpay.util.Sha1Util;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.jdom.JDOMException;
import com.sun.org.apache.xalan.internal.xsltc.runtime.Hashtable;
import com.zk.common.wxpay.util.MD5Util;
import com.zk.common.wxpay.util.TenpayUtil;
import com.zk.common.wxpay.util.XMLUtil;
/**
* 微信支付服务器签名支付请求应答类 api说明： getKey()/setKey(),获取/设置密钥
* getParameter()/setParameter(),获取/设置参数值 getAllParameters(),获取所有参数
* isTenpaySign(),是否财付通签名,true:是 false:否 getDebugInfo(),获取debug信息
*/
public class ResponseHandler {
private static final String appkey = APP_KEY;
/** 密钥 */
private String key;
/** 应答的参数 */
private SortedMap parameters;
/** debug信息 */
private String debugInfo;
private HttpServletRequest request;
private HttpServletResponse response;
private String uriEncoding;
private Hashtable xmlMap;
private SortedMap smap;
public SortedMap getSmap() {
return smap;
}
private String k;
/**
* 构造函数
*
* @param request
* @param response
*/
public ResponseHandler(HttpServletRequest request,
HttpServletResponse response) {
this.request = request;
this.response = response;
this.smap = new TreeMap();
this.key = "";
this.parameters = new TreeMap();
this.debugInfo = "";
this.uriEncoding = "";
Map m = this.request.getParameterMap();
Iterator it = m.keySet().iterator();
while (it.hasNext()) {
String k = (String) it.next();
String v = ((String[]) m.get(k))[0];
this.setParameter(k, v);
}
BufferedReader reader =null;
try{
reader = new BufferedReader(new InputStreamReader(request.getInputStream()));
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line);
}
Document doc = DocumentHelper.parseText(sb.toString());
Element root = doc.getRootElement();
for (Iterator iterator = root.elementIterator(); iterator.hasNext();) {
Element e = (Element) iterator.next();
smap.put(e.getName(), e.getText());
}
}catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
}
/**
* 获取密钥
*/
public String getKey() {
return key;
}
/**
* 设置密钥
*/
public void setKey(String key) {
this.key = key;
}
/**
* 获取参数值
*
* @param parameter
* 参数名称
* @return String
*/
public String getParameter(String parameter) {
String s = (String) this.parameters.get(parameter);
return (null == s) ? "" : s;
}
/**
* 设置参数值
*
* @param parameter
* 参数名称
* @param parameterValue
* 参数值
*/
public void setParameter(String parameter, String parameterValue) {
String v = "";
if (null != parameterValue) {
v = parameterValue.trim();
}
this.parameters.put(parameter, v);
}
/**
* 返回所有的参数
*
* @return SortedMap
*/
public SortedMap getAllParameters() {
return this.parameters;
}
public void doParse(String xmlContent) throws JDOMException, IOException {
this.parameters.clear();
// 解析xml,得到map
Map m = XMLUtil.doXMLParse(xmlContent);
// 设置参数
Iterator it = m.keySet().iterator();
while (it.hasNext()) {
String k = (String) it.next();
String v = (String) m.get(k);
this.setParameter(k, v);
}
}
/**
* 是否财付通签名,规则是:按参数名称a-z排序,遇到空值的参数不参加签名。
*
* @return boolean
*/
public boolean isValidSign() {
StringBuffer sb = new StringBuffer();
Set es = this.parameters.entrySet();
Iterator it = es.iterator();
while (it.hasNext()) {
Map.Entry entry = (Map.Entry) it.next();
String k = (String) entry.getKey();
String v = (String) entry.getValue();
if (!"sign".equals(k) && null != v && !"".equals(v)) {
sb.append(k + "=" + v + "&");
}
}
sb.append("key=" + this.getKey());
// 算出摘要
String enc = TenpayUtil.getCharacterEncoding(this.request,
this.response);
String sign = MD5Util.MD5Encode(sb.toString(), enc).toLowerCase();
String ValidSign = this.getParameter("sign").toLowerCase();
// debug信息
this.setDebugInfo(sb.toString() + " => sign:" + sign + " ValidSign:"
+ ValidSign);
System.out.println("财付通签名："+this.getDebugInfo());
return ValidSign.equals(sign);
}
/**
* 判断微信签名
*/
public boolean isWXsign() {
StringBuffer sb = new StringBuffer();
String keys = "";
SortedMap signParams = new TreeMap();
Set es = this.smap.entrySet();
Iterator it = es.iterator();
while (it.hasNext()) {
Map.Entry entry = (Map.Entry) it.next();
String k = (String) entry.getKey();
String v = (String) entry.getValue();
if (k != "SignMethod" && k != "AppSignature") {
signParams.put(k.toLowerCase(), v);
}
}
signParams.put("appkey", this.appkey);
Set set = signParams.entrySet();
Iterator pit = set.iterator();
while (pit.hasNext()) {
Map.Entry entry = (Map.Entry) pit.next();
String k = (String) entry.getKey();
String v = (String) entry.getValue();
if (sb.length() == 0) {
sb.append(k + "=" + v);
} else {
sb.append("&" + k + "=" + v);
}
}
String sign = Sha1Util.getSha1(sb.toString()).toString().toLowerCase();
this.setDebugInfo(sb.toString() + " => SHA1 sign:" + sign);
return sign.equals(this.smap.get("AppSignature"));
}
// 判断微信维权签名
public boolean isWXsignfeedback() {
StringBuffer sb = new StringBuffer();
Hashtable signMap = new Hashtable();
Set es = this.parameters.entrySet();
Iterator it = es.iterator();
while (it.hasNext()) {
Map.Entry entry = (Map.Entry) it.next();
String k = (String) entry.getKey();
String v = (String) entry.getValue();
if (k != "SignMethod" && k != "AppSignature") {
sb.append(k + "=" + v + "&");
}
}
signMap.put("appkey", this.appkey);
// ArrayList akeys = new ArrayList();
// akeys.Sort();
while (it.hasNext()) {
String v = k;
if (sb.length() == 0) {
sb.append(k + "=" + v);
} else {
sb.append("&" + k + "=" + v);
}
}
String sign = Sha1Util.getSha1(sb.toString()).toString().toLowerCase();
this.setDebugInfo(sb.toString() + " => SHA1 sign:" + sign);
return sign.equals(this.smap.get("AppSignature"));
}
/**
* 返回处理结果给财付通服务器。
*
* @param msg
* Success or fail
* @throws IOException
*/
public void sendToCFT(String msg) throws IOException {
String strHtml = msg;
PrintWriter out = this.getHttpServletResponse().getWriter();
out.println(strHtml);
out.flush();
out.close();
}
/**
* 获取uri编码
*
* @return String
*/
public String getUriEncoding() {
return uriEncoding;
}
/**
* 设置uri编码
*
* @param uriEncoding
* @throws UnsupportedEncodingException
*/
public void setUriEncoding(String uriEncoding)
throws UnsupportedEncodingException {
if (!"".equals(uriEncoding.trim())) {
this.uriEncoding = uriEncoding;
// 编码转换
String enc = TenpayUtil.getCharacterEncoding(request, response);
Iterator it = this.parameters.keySet().iterator();
while (it.hasNext()) {
String k = (String) it.next();
String v = this.getParameter(k);
v = new String(v.getBytes(uriEncoding.trim()), enc);
this.setParameter(k, v);
}
}
}
/**
* 获取debug信息
*/
public String getDebugInfo() {
return debugInfo;
}
/**
* 设置debug信息
*/
protected void setDebugInfo(String debugInfo) {
this.debugInfo = debugInfo;
}
protected HttpServletRequest getHttpServletRequest() {
return this.request;
}
protected HttpServletResponse getHttpServletResponse() {
return this.response;
}
}
2.Jsapi调用
在第一步中已拼好包放入request中了，第二部js调用微信api，看代码：
点击支付按钮，调用callpay 即可。
3.微信支付后的通知接口
支付成功了，微信根据你提供的notify_url，来通知你支付成功与否，虽然js里知道了结果，但这里需要正式通知，并处理业务，下面是我的代码片段：
System.out.println("-----------------微信支付来消息啦--------------------------");
ResponseHandler resHandler = new ResponseHandler(request,response);
resHandler.setKey(PARTNER_KEY);
if (resHandler.isValidSign() == true) {
if (resHandler.isWXsign() == true) {
// 商户订单号
String out_trade_no = resHandler
.getParameter("out_trade_no");
// 财付通订单号
String transaction_id = resHandler
.getParameter("transaction_id");
// 金额,以分为单位
String total_fee = resHandler.getParameter("total_fee");
// 如果有使用折扣券，discount有值，total_fee+discount=原请求的total_fee
String discount = resHandler.getParameter("discount");
// 支付结果
String trade_state = resHandler
.getParameter("trade_state");
System.out.println("支付的订单号：" + out_trade_no);
// 判断签名及结果
if ("0".equals(trade_state)) {
System.out.println("哈哈，微信支付成功了");
// ------------------------------
// 即时到账处理业务开始
// ------------------------------
// 处理数据库逻辑
// 注意交易单不要重复处理
// 注意判断返回金额
// ------------------------------
// 即时到账处理业务完毕
// ------------------------------
System.out.println("success 后台通知成功");
// 给财付通系统发送成功信息，财付通系统收到此结果后不再进行后续通知
resHandler.sendToCFT("success");
} else {// sha1签名失败
System.out.println("fail -SHA1 failed");
resHandler.sendToCFT("fail");
}
} else {// MD5签名失败
System.out.println("fail -Md5 failed");
}
}
到这里OK了，支付接口完成了。
别忘了，还有维权接口，维权接口很简单，接收维权的数据，然后通过api告知微信处理结果就ok了。
看完了记得顶一下哦。。。