APP微信支付（java后台_统一下单和回调）

微信支付Java后台

1.微信配置信息 global.properties



2.方法wxpay用于生成预支付订单信息
        方法notifyWeiXinPay用于微信支付成功后的回调, 注意: 在手机端使用微信支付成功后，微信服务器会根据提供的回调地址进行回调, parameterMap.put("notify_url", wxnotify); (见下面代码) 

        在局域网是无法进行回调的，必须将你的服务端放在公网上进行测试， 回调函数会被多次调用，如果第一次成功后，你可以将业务数据状态标志为已处理, 对于相同订单的其它回调就不需要再次处理了;package com.main.controller;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.math.BigDecimal;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.SortedMap;
import java.util.TreeMap;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.jdom.JDOMException;
import org.springframework.http.MediaType;
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.main.model.WeiXinPrePay;
import com.main.util.ConfigManager;
import com.main.util.DateUtil;
import com.main.util.GeneralConstant;
import com.main.util.PayCommonUtil;
import com.main.util.Result;
import com.main.util.StringUtil;

@Controller
@RequestMapping("/pay")
public class PayController {

String randomString = PayCommonUtil.getRandomString(32);
//支付成功后的回调函数
public static String wxnotify = "http://com.zhuohuicalss/pay/notifyWeiXinPay";

public PayController() {
System.out.println("MainController构造函数");
}

/**
* @param totalAmount 支付金额
* @param description 描述
* @param request
* @return
*/
@RequestMapping(value = "/wxpay", produces = MediaType.APPLICATION_JSON_VALUE)
@ResponseBody
public Result wxpay(HttpServletRequest request) {
Result result = new Result();
Long userId = new Long(1);//baseController.getUserId();

BigDecimal totalAmount = new BigDecimal(request.getParameter("totalPrice"));
String trade_no = "";
String description="";
try {
trade_no = new String(request.getParameter("orderNum").getBytes("ISO-8859-1"),"UTF-8");
description = request.getParameter("description");
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
String openId = "";

Map<String, String> map = weixinPrePay(trade_no,totalAmount,description,openId,request);
SortedMap<String, Object> finalpackage = new TreeMap<String, Object>();
//应用ID
finalpackage.put("appid", ConfigManager.getInstance().getConfigItem("WXAppID")/*PayCommonUtil.APPID*/);
//商户号
finalpackage.put("partnerid", ConfigManager.getInstance().getConfigItem("MCH_ID"));
Long time = (System.currentTimeMillis() / 1000);
//时间戳
finalpackage.put("timestamp", time.toString());
//随机字符串
finalpackage.put("noncestr", map.get("nonce_str"));
//预支付交易会话ID
finalpackage.put("prepayid", map.get("prepay_id"));
//扩展字段
finalpackage.put("package", "Sign=WXPay");

WeiXinPrePay prePay = new WeiXinPrePay();
prePay.setAppId(ConfigManager.getInstance().getConfigItem("WXAppID"));
prePay.setMchId(ConfigManager.getInstance().getConfigItem("MCH_ID"));
prePay.setTimeStamp(time.toString());
prePay.setNonceStr(map.get("nonce_str"));
prePay.setPrepayId(map.get("prepay_id"));
prePay.setSignType("MD5");
prePay.setPaySign(sign);
result.setData(prePay);
result.setStateCode(GeneralConstant.SUCCESS);
result.setDesc("微信支付加载成功");

return result;
}

/**
* 统一下单
* 应用场景：商户系统先调用该接口在微信支付服务后台生成预支付交易单，返回正确的预支付交易回话标识后再在APP里面调起支付。
* @param trade_no
* @param totalAmount
* @param description
* @param openid
* @param sym
* @param request
* @return
*/
@SuppressWarnings("unchecked")
public Map<String, String> weixinPrePay(String trade_no,BigDecimal totalAmount,
String description, String openid, HttpServletRequest request) {
SortedMap<String, Object> parameterMap = new TreeMap<String, Object>();
parameterMap.put("appid", ConfigManager.getInstance().getConfigItem("WXAppID")); //应用appid
parameterMap.put("mch_id", ConfigManager.getInstance().getConfigItem("MCH_ID")/*PayCommonUtil.MCH_ID*/); //商户号
//parameterMap.put("device_info", "WEB");
parameterMap.put("nonce_str", randomString);
parameterMap.put("body", description);
parameterMap.put("out_trade_no", trade_no);
parameterMap.put("fee_type", "CNY");
System.out.println("jiner");
BigDecimal total = totalAmount.multiply(new BigDecimal(100)); //接口中参数支付金额单位为【分】，参数值不能带小数，所以乘以100
java.text.DecimalFormat df=new java.text.DecimalFormat("0");
parameterMap.put("total_fee", df.format(total));
System.out.println("jiner2");
parameterMap.put("spbill_create_ip", PayCommonUtil.getRemoteHost(request));
parameterMap.put("notify_url", wxnotify);
parameterMap.put("trade_type", "APP");//"JSAPI"
//trade_type为JSAPI是 openid为必填项
//parameterMap.put("openid", openid);
System.out.println("");
String sign = PayCommonUtil.createSign("UTF-8", parameterMap);
System.out.println("jiner2");
parameterMap.put("sign", sign);
String requestXML = PayCommonUtil.getRequestXml(parameterMap);
System.out.println(requestXML);
String result = PayCommonUtil.httpsRequest(
"https://api.mch.weixin.qq.com/pay/unifiedorder", "POST",
requestXML);
System.out.println(result);
Map<String, String> map = null;
try {
map = PayCommonUtil.doXMLParse(result);
} catch (JDOMException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return map;
}

/**
* 此函数会被执行多次，如果支付状态已经修改为已支付，则下次再调的时候判断是否已经支付，如果已经支付了，则什么也执行
* @param request
* @param response
* @return
* @throws IOException
* @throws JDOMException
*/
@RequestMapping(value = "notifyWeiXinPay", produces = MediaType.APPLICATION_JSON_VALUE)
// @RequestDescription("支付回调地址")
@ResponseBody
public String notifyWeiXinPay(HttpServletRequest request, HttpServletResponse response) throws IOException, JDOMException {
System.out.println("微信支付回调");
InputStream inStream = request.getInputStream();
ByteArrayOutputStream outSteam = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int len = 0;
while ((len = inStream.read(buffer)) != -1) {
outSteam.write(buffer, 0, len);
}
String resultxml = new String(outSteam.toByteArray(), "utf-8");
Map<String, String> params = PayCommonUtil.doXMLParse(resultxml);
outSteam.close();
inStream.close();

Map<String,String> return_data = new HashMap<String,String>();
if (!PayCommonUtil.isTenpaySign(params)) {
// 支付失败
return_data.put("return_code", "FAIL");
return_data.put("return_msg", "return_code不正确");
return StringUtil.GetMapToXML(return_data);
} else {
System.out.println("===============付款成功==============");
// ------------------------------
// 处理业务开始
// ------------------------------
// 此处处理订单状态，结合自己的订单数据完成订单状态的更新
// ------------------------------

String total_fee = params.get("total_fee");
double v = Double.valueOf(total_fee) / 100;
String out_trade_no = String.valueOf(Long.parseLong(params.get("out_trade_no").split("O")[0]));
Date accountTime = DateUtil.stringtoDate(params.get("time_end"), "yyyyMMddHHmmss");
String ordertime = DateUtil.dateToString(new Date(), "yyyy-MM-dd HH:mm:ss");
String totalAmount = String.valueOf(v);
String appId = params.get("appid");
String tradeNo = params.get("transaction_id");

return_data.put("return_code", "SUCCESS");
return_data.put("return_msg", "OK");
return StringUtil.GetMapToXML(return_data);
}
}

}
3.用到的一些工具类import java.io.InputStream;
import java.util.*;

/**
* 读取配置文件的类 单例类
* @author Administrator
*
*/
public class ConfigManager {
// 属性文件命名
private Properties m_props = null;
private static Map<String,String> configMap;
private static ConfigManager m_instance = null;
private static Properties props = null;
private ConfigManager() {
m_props = new Properties();
configMap = new HashMap<String,String>();
try {
props = System.getProperties(); //获取系统属性
m_props.load(getInputStream());
getSysConfigMsg();

} catch (Exception e) {
e.printStackTrace();
}
}
public synchronized static ConfigManager getInstance() {
if(m_instance == null){
m_instance = new ConfigManager();
}
return m_instance;
}

public InputStream getInputStream() {
InputStream is = null;
try {
is = getClass().getClassLoader().getResourceAsStream("global.properties");
} catch (Exception e) {
e.printStackTrace();
}
return is;
}

public Map<String,String> getSysConfigMsg(){
Set<Object> keyset = m_props.keySet();
Iterator<Object> it = keyset.iterator();
while(it.hasNext()){
String nextkey = it.next().toString();
configMap.put(nextkey,getConfigItem(nextkey));
}
return configMap;
}

public String getConfigItem(String name) {
String val = m_props.getProperty(name).trim();
if("fileSavePath".equals(name)){
if(props.getProperty("os.name").startsWith("Windows")){
val = val.split("#")[0].toString().trim();
}else{
val = val.split("#")[1].toString().trim();
}
}

return val;

}
public Map<String,String> getConfigMap(){
return configMap;
}

}

import java.text.DateFormat;
import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.regex.Pattern;

public class DateUtil {

// 格式：年－月－日 小时：分钟：秒
public static final String FORMAT_ONE = "yyyy-MM-dd HH:mm:ss";

// 格式：年－月－日 小时：分钟
public static final String FORMAT_TWO = "yyyy-MM-dd HH:mm";

// 格式：年月日 小时分钟秒
public static final String FORMAT_THREE = "yyyyMMdd-HHmmss";

// 格式：年月日
public static final String FORMAT_FOUR = "yyyyMMdd";

// 格式：年－月－日
public static final String LONG_DATE_FORMAT = "yyyy-MM-dd";

// 格式：月－日
public static final String SHORT_DATE_FORMAT = "MM-dd";

// 格式：小时：分钟：秒
public static final String LONG_TIME_FORMAT = "HH:mm:ss";

//格式：年-月
public static final String MONTG_DATE_FORMAT = "yyyy-MM";

// 年的加减
public static final int SUB_YEAR = Calendar.YEAR;

// 月加减
public static final int SUB_MONTH = Calendar.MONTH;

// 天的加减
public static final int SUB_DAY = Calendar.DATE;

// 小时的加减
public static final int SUB_HOUR = Calendar.HOUR;

// 分钟的加减
public static final int SUB_MINUTE = Calendar.MINUTE;

// 秒的加减
public static final int SUB_SECOND = Calendar.SECOND;

static final String dayNames[] = { "星期日", "星期一", "星期二", "星期三", "星期四",
"星期五", "星期六" };

public DateUtil() {
}

/**
* 把符合日期格式的字符串转换为日期类型
*/
public static Date stringtoDate(String dateStr, String format) {
Date d = null;
SimpleDateFormat formater = new SimpleDateFormat(format);
try {
formater.setLenient(false);
d = formater.parse(dateStr);
} catch (Exception e) {
// log.error(e);
d = null;
}
return d;
}

/**
* 把符合日期格式的字符串转换为日期类型
*/
public static Date stringtoDate(String dateStr, String format,
ParsePosition pos) {
Date d = null;
SimpleDateFormat formater = new SimpleDateFormat(format);
try {
formater.setLenient(false);
d = formater.parse(dateStr, pos);
} catch (Exception e) {
d = null;
}
return d;
}

/**
* 把日期转换为字符串
*/
public static String dateToString(Date date, String format) {
String result = "";
SimpleDateFormat formater = new SimpleDateFormat(format);
try {
result = formater.format(date);
} catch (Exception e) {
// log.error(e);
}
return result;
}

/**
* 获取当前时间的指定格式
*/
public static String getCurrDate(String format) {
return dateToString(new Date(), format);
}

/**
*
* @Title:        dateSub
* @Date          2014-1-9 上午10:44:02
* @Description:  得到指定日期前(后)的日期
* @param:        @param dateKind  例：Calendar.DAY_OF_MONTH
* @param:        @param dateStr  指定日期
* @param:        @param amount   增加(减去)的时间量
* @param:        @return
* @return:       String
* @throws
* @author        mtf
*/
public static String dateSub(int dateKind, String dateStr, int amount) {
Date date = stringtoDate(dateStr, MONTG_DATE_FORMAT);
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(dateKind, amount);
return dateToString(calendar.getTime(), FORMAT_ONE);
}

/**
* 昨日日期
* @return
*/
public static String yearthDate(String dateStr){
Date date = stringtoDate(dateStr, LONG_DATE_FORMAT);//取时间
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(calendar.DATE,-1);//把日期往后增加一天.整数往后推,负数往前移动
//date=calendar.getTime();   //这个时间就是日期往后推一天的结果
return dateToString(calendar.getTime(), LONG_DATE_FORMAT);
}

/**
* 两个日期相减
* @return 相减得到的秒数
*/
public static long timeSub(String firstTime, String secTime) {
long first = stringtoDate(firstTime, FORMAT_ONE).getTime();
long second = stringtoDate(secTime, FORMAT_ONE).getTime();
return (second - first) / 1000;
}
/**
* 两个日期相减
* 参数地DATE
* second 两个日期相差的秒
* @return 相减得到的秒数
* 后面时间减去前面时间  再减去 相差秒数    如果大于0 返回 FASLE
*/
public static boolean timeSub(Date firstTime, Date secTime,long  secs) {
long first = firstTime.getTime();
long second = secTime.getTime();
// 判断两个时间 是否间隔那么长 secs。
return (second - first - secs) > 0 ? false:true;
}
/**
* 两个日期相减
* 参数地DATE
* @return 相减得到的秒数
* 后面时间减去前面时间  如果大于0 返回 false
*/
public static boolean timeSub(Date firstTime, Date secTime) {
long first = firstTime.getTime();
long second = secTime.getTime();
return (second - first)>0?false:true;
}
/**
* 获得某月的天数
*/
public static int getDaysOfMonth(String year, String month) {
int days = 0;
if (month.equals("1") || month.equals("3") || month.equals("5")
|| month.equals("7") || month.equals("8") || month.equals("10")
|| month.equals("12")) {
days = 31;
} else if (month.equals("4") || month.equals("6") || month.equals("9")
|| month.equals("11")) {
days = 30;
} else {
if ((Integer.parseInt(year) % 4 == 0 && Integer.parseInt(year) % 100 != 0)
|| Integer.parseInt(year) % 400 == 0) {
days = 29;
} else {
days = 28;
}
}

return days;
}

/**
* 获取某年某月的天数
*/
public static int getDaysOfMonth(int year, int month) {
Calendar calendar = Calendar.getInstance();
calendar.set(year, month - 1, 1);
return calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
}

/**
* 获得当前日期
*/
public static int getToday() {
Calendar calendar = Calendar.getInstance();
return calendar.get(Calendar.DATE);
}

/**
* 获得当前月份
*/
public static int getToMonth() {
Calendar calendar = Calendar.getInstance();
return calendar.get(Calendar.MONTH) + 1;
}

/**
* 获得当前年份
*/
public static int getToYear() {
Calendar calendar = Calendar.getInstance();
return calendar.get(Calendar.YEAR);
}

/**
* 返回日期的天
*/
public static int getDay(Date date) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
return calendar.get(Calendar.DATE);
}

/**
* 返回日期的年
*/
public static int getYear(Date date) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
return calendar.get(Calendar.YEAR);
}

/**
* 返回日期的月份，1-12
*/
public static int getMonth(Date date) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
return calendar.get(Calendar.MONTH) + 1;
}

/**
* 计算两个日期相差的天数，如果date2 > date1 返回正数，否则返回负数
*/
public static long dayDiff(Date date1, Date date2) {
return (date2.getTime() - date1.getTime()) / 86400000;
}

/**
* 比较两个日期的年差
*/
public static int yearDiff(String before, String after) {
Date beforeDay = stringtoDate(before, LONG_DATE_FORMAT);
Date afterDay = stringtoDate(after, LONG_DATE_FORMAT);
return getYear(afterDay) - getYear(beforeDay);
}

/**
* 比较指定日期与当前日期的差
*/
public static int yearDiffCurr(String after) {
Date beforeDay = new Date();
Date afterDay = stringtoDate(after, LONG_DATE_FORMAT);
return getYear(beforeDay) - getYear(afterDay);
}

/**
* 获取每月的第一周
*/
public static int getFirstWeekdayOfMonth(int year, int month) {
Calendar c = Calendar.getInstance();
c.setFirstDayOfWeek(Calendar.SATURDAY); // 星期天为第一天
c.set(year, month - 1, 1);
return c.get(Calendar.DAY_OF_WEEK);
}

/**
* 获取每月的最后一周
*/
public static int getLastWeekdayOfMonth(int year, int month) {
Calendar c = Calendar.getInstance();
c.setFirstDayOfWeek(Calendar.SATURDAY); // 星期天为第一天
c.set(year, month - 1, getDaysOfMonth(year, month));
return c.get(Calendar.DAY_OF_WEEK);
}

/**
* 获得当前日期字符串，格式"yyyy-MM-dd HH:mm:ss"
*
* @return
*/
public static String getNow() {
Calendar today = Calendar.getInstance();
return dateToString(today.getTime(), FORMAT_ONE);
}

/**
* 判断日期是否有效,包括闰年的情况
*
* @param date
*          YYYY-mm-dd
* @return
*/
public static boolean isDate(String date) {
StringBuffer reg = new StringBuffer(
"^((\\d{2}(([02468][048])|([13579][26]))-?((((0?");
reg.append("[13578])|(1[02]))-?((0?[1-9])|([1-2][0-9])|(3[01])))");
reg.append("|(((0?[469])|(11))-?((0?[1-9])|([1-2][0-9])|(30)))|");
reg.append("(0?2-?((0?[1-9])|([1-2][0-9])))))|(\\d{2}(([02468][12");
reg.append("35679])|([13579][01345789]))-?((((0?[13578])|(1[02]))");
reg.append("-?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))");
reg.append("-?((0?[1-9])|([1-2][0-9])|(30)))|(0?2-?((0?[");
reg.append("1-9])|(1[0-9])|(2[0-8]))))))");
Pattern p = Pattern.compile(reg.toString());
return p.matcher(date).matches();
}

/*****
* 时间 增加、减少 n个小时以后时间
* @param date
*          YYYY-mm-dd HH:mm:ss
* @param num>0  小时
* @param type  增加和减少标志
* **/
public static Date adjustDateByHour(Date d ,Integer num, int  type) {
Calendar Cal= Calendar.getInstance();
DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Cal.setTime(d);
if(type==0){
Cal.add(Calendar.MINUTE,-num);
// System.out.println("date:"+df.format(Cal.getTime()));

}else
{
Cal.add(Calendar.MINUTE,num);
//System.out.println("date:"+df.format(Cal.getTime()));
}
return Cal.getTime();
}
/*****
* 时间 增加、减少 n个分钟以后时间
* @param date
*          YYYY-mm-dd HH:mm:ss
* @param num>0  分钟
* @param type  增加和减少标志
* **/
public static Date adjustDateByMinutes(Date d ,Integer num, int  type) {
Calendar Cal= Calendar.getInstance();
DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Cal.setTime(d);
if(type==0){
Cal.add(Calendar.MINUTE,-num);
//  System.out.println("date:"+df.format(Cal.getTime()));

}else
{
Cal.add(Calendar.MINUTE,num);
//   System.out.println("date:"+df.format(Cal.getTime()));
}
return Cal.getTime();
}

public static void main(String[] args){
//    	String dateStr = DateUtil.yearthDate("2017-05-30");
//    	System.out.println(dateStr);
//    	long min = DateUtil.timeSub("2017-04-12 00:00:00", "2017-04-13 00:00:00")/60;
//    	System.out.println(min);
String settlementDate = DateUtil.dateToString(new Date(), "yyyy-MM-dd");
long day = DateUtil.dayDiff(DateUtil.stringtoDate("2017-06-22", "yyyy-MM-dd"),DateUtil.stringtoDate(settlementDate, "yyyy-MM-dd"));
if(day >= 0){
System.out.println(day);
}

String goodsArriveTime = "2017-04-02 17:00-18:00";
int space_index = goodsArriveTime.indexOf(" ");
String arrive_date = goodsArriveTime.substring(0, space_index);
String arrive_time = goodsArriveTime.substring(space_index+1, goodsArriveTime.length());

System.out.println(arrive_date);
System.out.println(arrive_time);
String arrive_start_time = arrive_time.substring(0, 2);
String arrive_end_time = arrive_time.substring(6,8);

System.out.println(arrive_start_time);
System.out.println(arrive_end_time);

String Time = DateUtil.getCurrDate("HH");
System.out.println(Time);

String Time2 = DateUtil.getCurrDate("mm");
System.out.println(Time2);
}

}

import java.security.MessageDigest;

public class MD5Util {
private static String byteArrayToHexString(byte b[]) {
StringBuffer resultSb = new StringBuffer();
for (int i = 0; i < b.length; i++)
resultSb.append(byteToHexString(b[i]));

return resultSb.toString();
}

private static String byteToHexString(byte b) {
int n = b;
if (n < 0)
n += 256;
int d1 = n / 16;
int d2 = n % 16;
return hexDigits[d1] + hexDigits[d2];
}

public static String MD5Encode(String origin, String charsetname) {
String resultString = null;
try {
resultString = new String(origin);
MessageDigest md = MessageDigest.getInstance("MD5");
if (charsetname == null || "".equals(charsetname))
resultString = byteArrayToHexString(md.digest(resultString
.getBytes()));
else
resultString = byteArrayToHexString(md.digest(resultString
.getBytes(charsetname)));
} catch (Exception exception) {
}
return resultString;
}

private static final String hexDigits[] = { "0", "1", "2", "3", "4", "5",
"6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };

}

import org.apache.http.Consts;
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.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.ssl.SSLContexts;
import org.apache.http.util.EntityUtils;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder;

import javax.net.ssl.SSLContext;
import javax.servlet.http.HttpServletRequest;
import java.io.*;
import java.net.ConnectException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.security.KeyStore;
import java.util.*;

public class PayCommonUtil {
//微信参数配置
public static String API_KEY = ConfigManager.getInstance().getConfigItem("API_KEY");

//随机字符串生成
public static String getRandomString(int length) { //length表示生成字符串的长度
String base = "abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
Random random = new Random();
StringBuffer sb = new StringBuffer();
for (int i = 0; i < length; i++) {
int number = random.nextInt(base.length());
sb.append(base.charAt(number));
}
return sb.toString();
}

//请求xml组装
public static String getRequestXml(SortedMap<String,Object> parameters){
StringBuffer sb = new StringBuffer();
sb.append("<xml>");
Set es = parameters.entrySet();
Iterator it = es.iterator();
while(it.hasNext()) {
Map.Entry entry = (Map.Entry)it.next();
String key = (String)entry.getKey();
String value = (String)entry.getValue();
if ("attach".equalsIgnoreCase(key)||"body".equalsIgnoreCase(key)||"sign".equalsIgnoreCase(key)) {
sb.append("<"+key+">"+"<![CDATA["+value+"]]></"+key+">");
}else {
sb.append("<"+key+">"+value+"</"+key+">");
}
}
sb.append("</xml>");
return sb.toString();
}

//生成签名
public static String createSign(String characterEncoding,SortedMap<String,Object> parameters){
StringBuffer sb = new StringBuffer();
Set es = parameters.entrySet();
Iterator it = es.iterator();
while(it.hasNext()) {
Map.Entry entry = (Map.Entry)it.next();
String k = (String)entry.getKey();
Object v = entry.getValue();
if(null != v && !"".equals(v)
&& !"sign".equals(k) && !"key".equals(k)) {
sb.append(k + "=" + v + "&");
}
}
sb.append("key=" + API_KEY);
System.out.println(sb.toString());
String sign = MD5Util.MD5Encode(sb.toString(), characterEncoding).toUpperCase();
return sign;
}

/**
* 验证回调签名
* @return
*/
public static boolean isTenpaySign(Map<String, String> map) {
String characterEncoding="utf-8";
String charset = "utf-8";
String signFromAPIResponse = map.get("sign");
if (signFromAPIResponse == null || signFromAPIResponse.equals("")) {
System.out.println("API返回的数据签名数据不存在，有可能被第三方篡改!!!");
return false;
}
System.out.println("服务器回包里面的签名是:" + signFromAPIResponse);
//过滤空 设置 TreeMap
SortedMap<String,String> packageParams = new TreeMap();

for (String parameter : map.keySet()) {
String parameterValue = map.get(parameter);
String v = "";
if (null != parameterValue) {
v = parameterValue.trim();
}
packageParams.put(parameter, v);
}

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(!"sign".equals(k) && null != v && !"".equals(v)) {
sb.append(k + "=" + v + "&");
}
}
sb.append("key=" + API_KEY);

//将API返回的数据根据用签名算法进行计算新的签名，用来跟API返回的签名进行比较
//算出签名
String resultSign = "";
String tobesign = sb.toString();

if (null == charset || "".equals(charset)) {
resultSign = MD5Util.MD5Encode(tobesign, characterEncoding).toUpperCase();
}else{
try{
resultSign = MD5Util.MD5Encode(tobesign, characterEncoding).toUpperCase();
}catch (Exception e) {
resultSign = MD5Util.MD5Encode(tobesign, characterEncoding).toUpperCase();
}
}

String tenpaySign = ((String)packageParams.get("sign")).toUpperCase();
return tenpaySign.equals(resultSign);
}

//请求方法
public static String httpsRequest(String requestUrl, String requestMethod, String outputStr) {
try {

URL url = new URL(requestUrl);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();

conn.setDoOutput(true);
conn.setDoInput(true);
conn.setUseCaches(false);
// 设置请求方式（GET/POST）
conn.setRequestMethod(requestMethod);
conn.setRequestProperty("content-type", "application/x-www-form-urlencoded");
// 当outputStr不为null时向输出流写数据
if (null != outputStr) {
OutputStream outputStream = conn.getOutputStream();
// 注意编码格式
outputStream.write(outputStr.getBytes("UTF-8"));
outputStream.close();
}
// 从输入流读取返回内容
InputStream inputStream = conn.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);
}
// 释放资源
bufferedReader.close();
inputStreamReader.close();
inputStream.close();
inputStream = null;
conn.disconnect();
return buffer.toString();
} catch (ConnectException ce) {
System.out.println("连接超时：{}"+ ce);
} catch (Exception e) {
System.out.println("https请求异常：{}"+ e);
}
return null;
}

//退款的请求方法
public static String httpsRequest2(String requestUrl, String requestMethod, String outputStr) throws Exception {
KeyStore keyStore  = KeyStore.getInstance("PKCS12");
StringBuilder res = new StringBuilder("");
FileInputStream instream = new FileInputStream(new File("/home/apiclient_cert.p12"));
try {
keyStore.load(instream, "".toCharArray());
} finally {
instream.close();
}

// Trust own CA and all self-signed certs
SSLContext sslcontext = SSLContexts.custom()
.loadKeyMaterial(keyStore, "1313329201".toCharArray())
.build();
// Allow TLSv1 protocol only
SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(
sslcontext,
new String[] { "TLSv1" },
null,
SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
CloseableHttpClient httpclient = HttpClients.custom()
.setSSLSocketFactory(sslsf)
.build();
try {

HttpPost httpost = new HttpPost("https://api.mch.weixin.qq.com/secapi/pay/refund");
httpost.addHeader("Connection", "keep-alive");
httpost.addHeader("Accept", "*/*");
httpost.addHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
httpost.addHeader("Host", "api.mch.weixin.qq.com");
httpost.addHeader("X-Requested-With", "XMLHttpRequest");
httpost.addHeader("Cache-Control", "max-age=0");
httpost.addHeader("User-Agent", "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0) ");
StringEntity entity2 = new StringEntity(outputStr , Consts.UTF_8);
httpost.setEntity(entity2);
System.out.println("executing request" + httpost.getRequestLine());

CloseableHttpResponse response = httpclient.execute(httpost);

try {
HttpEntity entity = response.getEntity();

System.out.println("----------------------------------------");
System.out.println(response.getStatusLine());
if (entity != null) {
System.out.println("Response content length: " + entity.getContentLength());
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(entity.getContent()));
String text = "";
res.append(text);
while ((text = bufferedReader.readLine()) != null) {
res.append(text);
System.out.println(text);
}

}
EntityUtils.consume(entity);
} finally {
response.close();
}
} finally {
httpclient.close();
}
return  res.toString();
}

//xml解析
public static Map doXMLParse(String strxml) throws JDOMException, IOException {
strxml = strxml.replaceFirst("encoding=\".*\"", "encoding=\"UTF-8\"");

if(null == strxml || "".equals(strxml)) {
return null;
}

Map m = new HashMap();

InputStream in = new ByteArrayInputStream(strxml.getBytes("UTF-8"));
SAXBuilder builder = new SAXBuilder();
Document doc = builder.build(in);
Element root = doc.getRootElement();
List list = root.getChildren();
Iterator it = list.iterator();
while(it.hasNext()) {
Element e = (Element) it.next();
String k = e.getName();
String v = "";
List children = e.getChildren();
if(children.isEmpty()) {
v = e.getTextNormalize();
} else {
v = getChildrenText(children);
}

m.put(k, v);
}

//关闭流
in.close();

return m;
}

public static String getChildrenText(List children) {
StringBuffer sb = new StringBuffer();
if(!children.isEmpty()) {
Iterator it = children.iterator();
while(it.hasNext()) {
Element e = (Element) it.next();
String name = e.getName();
String value = e.getTextNormalize();
List list = e.getChildren();
sb.append("<" + name + ">");
if(!list.isEmpty()) {
sb.append(getChildrenText(list));
}
sb.append(value);
sb.append("</" + name + ">");
}
}

return sb.toString();
}

public static String getRemoteHost(HttpServletRequest request){
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();
}
return ip.equals("0:0:0:0:0:0:0:1")?"127.0.0.1":ip;
}
}

package com.lemonjr.api.utils;

import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class StringUtil {

/**
* 数值类型前面补零（共13位）
* @param num
* @return
*/
public static String supplementZeroGenerateThirteen(int num){
String str = String.format("%013d", num);

return str;
}

/**
* 数值类型前面补零（共16位）
* @param num
* @return
*/
public static String supplementZeroGenerateSixteen(int num){
String str = String.format("%016d", num);

return str;
}
/**
* 数值类型前面补零（共3位）
* @param num
* @return
*/
public static String supplementZeroGenerateThree(int num){
String str = String.format("%03d", num);

return str;
}

/**
* 判断字符串是不是double型
* @param str
* @return
*/
public static boolean isNumeric(String str){
Pattern pattern = Pattern.compile("[0-9]+[.]{0,1}[0-9]*[dD]{0,1}");
Matcher isNum = pattern.matcher(str);
if( !isNum.matches() ){
return false;
}
return true;
}

public static String trim(String str, boolean nullFlag){
String tempStr = null;

if (str != null)
{
tempStr = str.trim();
}

if (nullFlag)
{
if ("".equals(tempStr) || "null".equals(tempStr))
{
tempStr = null;
}
}
else
{
if (tempStr == null)
{
tempStr = "";
}
}

return tempStr;
}
public static String replace(String strSource, String strFrom, String strTo) {
if(strSource==null){
return null;
}
int i = 0;
if ((i = strSource.indexOf(strFrom, i)) >= 0) {
char[] cSrc = strSource.toCharArray();
char[] cTo = strTo.toCharArray();
int len = strFrom.length();
StringBuffer buf = new StringBuffer(cSrc.length);
buf.append(cSrc, 0, i).append(cTo);
i += len;
int j = i;
while ((i = strSource.indexOf(strFrom, i)) > 0) {
buf.append(cSrc, j, i - j).append(cTo);
i += len;
j = i;
}
buf.append(cSrc, j, cSrc.length - j);
return buf.toString();
}
return strSource;
}

public static String deal(String str) {
str = replace(str, "\\", "\\\\");
str = replace(str, "'", "\\'");
str = replace(str, "\r", "\\r");
str = replace(str, "\n", "\\n");
str = replace(str, "\"", "\\\"");
return str;
}

public static String GetMapToXML(Map<String,String> param){
StringBuffer sb = new StringBuffer();
sb.append("<xml>");
for (Map.Entry<String,String> entry : param.entrySet()) {
sb.append("<"+ entry.getKey() +">");
sb.append(entry.getValue());
sb.append("</"+ entry.getKey() +">");
}
sb.append("</xml>");
return sb.toString();
}

public static void main(String[] args){
//String a = StringUtil.supplementZeroGenerateThirteen(1000);
double a = 32.;
System.out.println(StringUtil.isNumeric("32."));
System.out.println(a);
}

}

4.用到的jar包<!--微信 -->
<dependency>
<groupId>com.github.liyiorg</groupId>
<artifactId>weixin-popular</artifactId>
<version>2.8.5</version>
</dependency>
<!--httpclient-->
<dependency>
<groupId>commons-httpclient</groupId>
<artifactId>commons-httpclient</artifactId>
<version>3.1</version>
</dependency>
<dependency>
<groupId>org.jdom</groupId>
<artifactId>jdom2</artifactId>
<version>2.0.6</version>
</dependency>以上是所有代码。不明白的留言！