RequestHandler requestHandler = new RequestHandler(super.getRequest(),super.getResponse())
//获取token //两小时内有效，两小时后重新获取
Token = requestHandler.GetToken()
//更新token 到应用中
requestHandler.getTokenReal()
System.out.println("微信支付获取token=======================:" +Token)
//requestHandler 初始化
requestHandler.init()
requestHandler.init(appid,appsecret, appkey,partnerkey, key)
// --------------------------------本地系统生成订单-------------------------------------
// 设置package订单参数
SortedMap<String, String>packageParams = new TreeMap<String, String>()
packageParams.put("bank_type", "WX")// 支付类型
packageParams.put("body", "xxxx")// 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", "http://xxxx.com/xxxx/wxcallback")// 通知地址 这里的通知地址使用外网地址测试，注意80端口是否打开。
packageParams.put("out_trade_no", no)// 商户订单号
packageParams.put("partner", partenerid)// 设置商户号
packageParams.put("spbill_create_ip", super.getRequest().getRemoteHost())// 订单生成的机器IP，指用户浏览器端IP
packageParams.put("total_fee", String.valueOf(rstotal))// 商品总金额,以分为单位
// 设置支付参数
SortedMap<String, String>signParams = new TreeMap<String, String>()
signParams.put("appid", appid)
signParams.put("noncestr", noncestr)
signParams.put("traceid", PropertiesUtils.getOrderNO())
signParams.put("timestamp", timestamp)
signParams.put("package", packageValue)
signParams.put("appkey", this.appkey)
// 生成支付签名，要采用URLENCODER的原始值进行SHA1算法！
String sign =""
try {
sign = Sha1Util.createSHA1Sign(signParams)
} catch (Exception e) {
e.printStackTrace()
}
// 增加非参与签名的额外参数
signParams.put("sign_method", "sha1")
signParams.put("app_signature", sign)
// api支付拼包结束------------------------------------
//获取prepayid
String prepayid = requestHandler.sendPrepay(signParams)
System.out.println("prepayid :" + prepayid)
// --------------------------------生成完成---------------------------------------------
//生成预付快订单完成，返回给android,ios 掉起微信所需要的参数。
SortedMap<String, String>payParams = new TreeMap<String, String>()
payParams.put("appid", appid)
payParams.put("noncestr", noncestr)
payParams.put("package", "Sign=WXPay")
payParams.put("partnerid", partenerid)
payParams.put("prepayid", prepayid)
payParams.put("appkey", this.appkey)
//这里除1000 是因为参数长度限制。
int time = (int) (System.currentTimeMillis() / 1000)
payParams.put("timestamp",String.valueOf(time))
System.out.println("timestamp:" + time)
//签名
String paysign =""
try {
paysign = Sha1Util.createSHA1Sign(payParams)
} catch (Exception e) {
e.printStackTrace()
}
payParams.put("sign", paysign)
//拼json 数据返回给客户端
BasicDBObject backObject = new BasicDBObject()
backObject.put("appid", appid)
backObject.put("noncestr", payParams.get("noncestr"))
backObject.put("package", "Sign=WXPay")
backObject.put("partnerid", payParams.get("partnerid"))
backObject.put("prepayid", payParams.get("prepayid"))
backObject.put("appkey", this.appkey)
backObject.put("timestamp",payParams.get("timestamp"))
backObject.put("sign",payParams.get("sign"))
String backstr = dataObject.toString()
System.out.println("backstr:" + backstr)
return backstr
====================到此为止，预付款订单已生成，并且已返回客户端====================
//坐等微信服务器通知，通知的地址就是生成预付款订单的notify_url
ResponseHandler resHandler = new ResponseHandler(request, response)
resHandler.setKey(partnerkey)
//创建请求对象
//RequestHandler queryReq = new RequestHandler(request, response)
//queryReq.init()
if (resHandler.isTenpaySign() == true) {
//商户订单号
String out_trade_no = resHandler.getParameter("out_trade_no")
System.out.println("out_trade_no:" + out_trade_no)
//财付通订单号
String transaction_id = resHandler.getParameter("transaction_id")
System.out.println("transaction_id:" + 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")
//判断签名及结果
if ("0".equals(trade_state)) {
//------------------------------
//即时到账处理业务开始
//------------------------------
System.out.println("----------------业务逻辑执行-----------------")
//——请根据您的业务逻辑来编写程序（以上代码仅作参考）——
System.out.println("----------------业务逻辑执行完毕-----------------")
System.out.println("success")// 请不要修改或删除
System.out.println("即时到账支付成功")
//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")
//给微信服务器返回success 否则30分钟通知8次
return "success"
}else{
System.out.println("通知签名验证失败")
resHandler.sendToCFT("fail")
response.setCharacterEncoding("utf-8")
}
}else {
System.out.println("fail -Md5 failed")
如下：public static String do_post(String url, List<NameValuePair> name_value_pair) throws IOException {
String body = "{}"
DefaultHttpClient httpclient = new DefaultHttpClient()
try {
HttpPost httpost = new HttpPost(url)
httpost.setEntity(new UrlEncodedFormEntity(name_value_pair, StandardCharsets.UTF_8))
HttpResponse response = httpclient.execute(httpost)
HttpEntity entity = response.getEntity()
body = EntityUtils.toString(entity)
} finally {
httpclient.getConnectionManager().shutdown()
}
return body
}
public static String do_get(String url) throws ClientProtocolException, IOException {
String body = "{}"
DefaultHttpClient httpclient = new DefaultHttpClient()
try {
HttpGet httpget = new HttpGet(url)
HttpResponse response = httpclient.execute(httpget)
HttpEntity entity = response.getEntity()
body = EntityUtils.toString(entity)
} finally {
httpclient.getConnectionManager().shutdown()
}
return body
}
说明：
本次的教程主要是对微信公众平台开发者模式的讲解，网络上很多类似文章，但很多都让初学微信开发的人一头雾水，所以总结自己的微信开发经验，将微信开发的整个过程系统的列出，并对主要代码进行讲解分析，让初学者尽快上手。
在阅读本文之前，应对微信公众平台的官方开发文档有所了解，知道接收和发送的都是xml格式的数据。另外，在做内容回复时用到了图灵机器人的api接口，这是一个自然语言解析的开放平台，可以帮我们解决整个微信开发过程中最困难的问题，此处不多讲，下面会有其详细的调用方式。
1.1 在登录微信官方平台之后，开启开发者模式，此时需要我们填写url和token，所谓url就是我们自己服务器的接口，用WechatServlet.java来实现，相关解释已经在注释中说明，代码如下：
[java] view plain copy
package demo.servlet
import java.io.BufferedReader
import java.io.IOException
import java.io.InputStream
import java.io.InputStreamReader
import java.io.OutputStream
import javax.servlet.ServletException
import javax.servlet.http.HttpServlet
import javax.servlet.http.HttpServletRequest
import javax.servlet.http.HttpServletResponse
import demo.process.WechatProcess
/**
* 微信服务端收发消息接口
*
* @author pamchen-1
*
*/
public class WechatServlet extends HttpServlet {
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request
* the request send by the client to the server
* @param response
* the response send by the server to the client
* @throws ServletException
* if an error occurred
* @throws IOException
* if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("UTF-8")
response.setCharacterEncoding("UTF-8")
/** 读取接收到的xml消息 */
StringBuffer sb = new StringBuffer()
InputStream is = request.getInputStream()
InputStreamReader isr = new InputStreamReader(is, "UTF-8")
BufferedReader br = new BufferedReader(isr)
String s = ""
while ((s = br.readLine()) != null) {
sb.append(s)
}
String xml = sb.toString() //次即为接收到微信端发送过来的xml数据
String result = ""
/** 判断是否是微信接入激活验证，只有首次接入验证时才会收到echostr参数，此时需要把它直接返回 */
String echostr = request.getParameter("echostr")
if (echostr != null && echostr.length() > 1) {
result = echostr
} else {
//正常的微信处理流程
result = new WechatProcess().processWechatMag(xml)
}
try {
OutputStream os = response.getOutputStream()
os.write(result.getBytes("UTF-8"))
os.flush()
os.close()
} catch (Exception e) {
e.printStackTrace()
}
}
/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to
* post.
*
* @param request
* the request send by the client to the server
* @param response
* the response send by the server to the client
* @throws ServletException
* if an error occurred
* @throws IOException
* if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response)
}
}
1.2 相应的web.xml配置信息如下，在生成WechatServlet.java的同时，可自动生成web.xml中的配置。前面所提到的url处可以填写例如：http//服务器地址/项目名/wechat.do
[html] view plain copy
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<servlet>
<description>This is the description of my J2EE component</description>
<display-name>This is the display name of my J2EE component</display-name>
<servlet-name>WechatServlet</servlet-name>
<servlet-class>demo.servlet.WechatServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>WechatServlet</servlet-name>
<url-pattern>/wechat.do</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
1.3 通过以上代码，我们已经实现了微信公众平台开发的框架，即开通开发者模式并成功接入、接收消息和发送消息这三个步骤。
下面就讲解其核心部分——解析接收到的xml数据，并以文本类消息为例，通过图灵机器人api接口实现智能回复。
2.1 首先看一下整体流程处理代码，包括：xml数据处理、调用图灵api、封装返回的xml数据。
[java] view plain copy
package demo.process
import java.util.Date
import demo.entity.ReceiveXmlEntity
/**
* 微信xml消息处理流程逻辑类
* @author pamchen-1
*
*/
public class WechatProcess {
/**
* 解析处理xml、获取智能回复结果（通过图灵机器人api接口）
* @param xml 接收到的微信数据
* @return 最终的解析结果（xml格式数据）
*/
public String processWechatMag(String xml){
/** 解析xml数据 */
ReceiveXmlEntity xmlEntity = new ReceiveXmlProcess().getMsgEntity(xml)
/** 以文本消息为例，调用图灵机器人api接口，获取回复内容 */
String result = ""
if("text".endsWith(xmlEntity.getMsgType())){
result = new TulingApiProcess().getTulingResult(xmlEntity.getContent())
}
/** 此时，如果用户输入的是“你好”，在经过上面的过程之后，result为“你也好”类似的内容
* 因为最终回复给微信的也是xml格式的数据，所有需要将其封装为文本类型返回消息
* */
result = new FormatXmlProcess().formatXmlAnswer(xmlEntity.getFromUserName(), xmlEntity.getToUserName(), result)
return result
}
}
2.2 解析接收到的xml数据，此处有两个类，ReceiveXmlEntity.java和ReceiveXmlProcess.java，通过反射的机制动态调用实体类中的set方法，可以避免很多重复的判断，提高代码效率，代码如下：
[java] view plain copy
package demo.entity
/**
* 接收到的微信xml实体类
* @author pamchen-1
*
*/
public class ReceiveXmlEntity {
private String ToUserName=""
private String FromUserName=""
private String CreateTime=""
private String MsgType=""
private String MsgId=""
private String Event=""
private String EventKey=""
private String Ticket=""
private String Latitude=""
private String Longitude=""
private String Precision=""
private String PicUrl=""
private String MediaId=""
private String Title=""
private String Description=""
private String Url=""
private String Location_X=""
private String Location_Y=""
private String Scale=""
private String Label=""
private String Content=""
private String Format=""
private String Recognition=""
public String getRecognition() {
return Recognition
}
public void setRecognition(String recognition) {
Recognition = recognition
}
public String getFormat() {
return Format
}
public void setFormat(String format) {
Format = format
}
public String getContent() {
return Content
}
public void setContent(String content) {
Content = content
}
public String getLocation_X() {
return Location_X
}
public void setLocation_X(String locationX) {
Location_X = locationX
}
public String getLocation_Y() {
return Location_Y
}
public void setLocation_Y(String locationY) {
Location_Y = locationY
}
public String getScale() {
return Scale
}
public void setScale(String scale) {
Scale = scale
}
public String getLabel() {
return Label
}
public void setLabel(String label) {
Label = label
}
public String getTitle() {
return Title
}
public void setTitle(String title) {
Title = title
}
public String getDescription() {
return Description
}
public void setDescription(String description) {
Description = description
}
public String getUrl() {
return Url
}
public void setUrl(String url) {
Url = url
}
public String getPicUrl() {
return PicUrl
}
public void setPicUrl(String picUrl) {
PicUrl = picUrl
}
public String getMediaId() {
return MediaId
}
public void setMediaId(String mediaId) {
MediaId = mediaId
}
public String getEventKey() {
return EventKey
}
public void setEventKey(String eventKey) {
EventKey = eventKey
}
public String getTicket() {
return Ticket
}
public void setTicket(String ticket) {
Ticket = ticket
}
public String getLatitude() {
return Latitude
}
public void setLatitude(String latitude) {
Latitude = latitude
}
public String getLongitude() {
return Longitude
}
public void setLongitude(String longitude) {
Longitude = longitude
}
public String getPrecision() {
return Precision
}
public void setPrecision(String precision) {
Precision = precision
}
public String getEvent() {
return Event
}
public void setEvent(String event) {
Event = event
}
public String getMsgId() {
return MsgId
}
public void setMsgId(String msgId) {
MsgId = msgId
}
public String getToUserName() {
return ToUserName
}
public void setToUserName(String toUserName) {
