由于个人公众中竟然需要用到微信相关开发，故整理下，以便后期查阅。
个人开发过程中积累的工具类Utilities
package com.project.wx.util; import com.alibaba.fastjson.JSONArray; import com.alibaba.fastjson.JSONObject; import org.jsoup.Jsoup; import org.jsoup.nodes.Document; import org.springframework.http.HttpHeaders; import org.springframework.http.HttpStatus; import org.springframework.http.ResponseEntity; import javax.servlet.http.HttpServletRequest; import java.math.BigDecimal; import java.net.InetAddress; import java.net.URL; import java.net.UnknownHostException; import java.security.MessageDigest; import java.text.NumberFormat; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.*; import java.util.regex.Matcher; import java.util.regex.Pattern; /** * Created by zhu on 2017/4/19. */ public class Utilities { public static void main(String[] args) { String value="A、安全第一、预防为主、综合治理 B、安全生产人人有责 C、安全为了生产,生产必须安全 D、安全第一，预防为主 "; turnOptionsToJson(value); String[] arr1 = {"1", "2", "3", "4"}; String[] arr2 = {"1", "2", "5", "8"}; List<String> arr4 = getDelValue(arr1,arr2); for (String s : arr4) { System.out.println(s); } } public static ResponseEntity returnResponseEntity(String result){ return new ResponseEntity(result,Utilities.setAccessControl(), HttpStatus.OK); } public static Integer[] returnLengthArg(int length){ Integer [] arg=new Integer[length]; Random random=new Random(); Set<Integer> tempSet=new LinkedHashSet<>(); while (tempSet.size()<length){ int value=random.nextInt(length); tempSet.add(value); } Integer[] toArray = tempSet.toArray(arg); return toArray; } public static String filter(String str) { if(str.trim().isEmpty()){ return str; } String pattern="[\ud83c\udc00-\ud83c\udfff]|[\ud83d\udc00-\ud83d\udfff]|[\u2600-\u27ff]"; String reStr=""; Pattern emoji=Pattern.compile(pattern); Matcher emojiMatcher=emoji.matcher(str); str=emojiMatcher.replaceAll(reStr); return str; } public static long getCurrentTimeStamp(){ long time = System.currentTimeMillis(); return time; } public static long date2TimeStamp(String date){ try { SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); return sdf.parse(date).getTime(); } catch (Exception e) { e.printStackTrace(); } return 0; } public static boolean timeCompare(String beginTime,String endTime){ boolean isBefore=false; SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd hh:mm:ss"); try { Date bt = sdf.parse(beginTime); Date et=sdf.parse(endTime); if (bt.before(et)){ //表示bt小于et isBefore=true; } } catch (ParseException e) { e.printStackTrace(); } return isBefore; } public static String getTimeTransform(String time){ long create_time=date2TimeStamp(time); long currentTimeStamp=getCurrentTimeStamp(); //得到距离当前时间 long show_hour=(currentTimeStamp-create_time)/1000/60/60; String show_time=show_hour+"小时前"; if(show_hour==0){ show_time="刚刚"; } if(show_hour>=24&&show_hour<24*7){ //大于一天，小于一周 show_hour=show_hour/24; show_time=show_hour+"天前"; } if(show_hour>=24*7&&show_hour<24*30){ //大于一周，小于一月 show_hour=show_hour/24/7; show_time=show_hour+"周前"; } if(show_hour>=24*30&&show_hour<24*30*12){ //大于一月，小于一年 show_hour=show_hour/24/30; show_time=show_hour+"月前"; } if(show_hour>=24*30*12){ //大于一年 show_hour=show_hour/24/30/12; show_time=show_hour+"年前"; } return show_time; } public static String timeStamp2Date(String timestamp){ try { SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); Date date=new Date(Long.parseLong(timestamp)); return sdf.format(date); } catch (Exception e) { e.printStackTrace(); } return ""; } public static String getCurrentTime() { Date inputDate = new Date(); SimpleDateFormat outputFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); String datetime = outputFormat.format(inputDate); return datetime; } public static String checkNull(String input){ String result=""; if(input==null||input.trim().equals("")||input.trim().equalsIgnoreCase("null")){ result=""; }else { result=input.trim(); } return result; } public static boolean checkEmpty(String input){ if(input==null||input.trim().equals("")||input.trim().equalsIgnoreCase("null")){ return true; }else { return false; } } public static boolean isLogined(HttpServletRequest request){ boolean is_logined=false; if(request.getSession().getAttribute("manager")!=null){ is_logined=true; } return is_logined; } public static Document getDocument(String name){ Document document=null; String url="http://weixin.sogou.com/weixin?type=1&s_from=input&query="+name+"&ie=utf8&_sug_=n&_sug_type_="; try { document= Jsoup.parse(new URL(url),10000); } catch (Exception e) { e.printStackTrace(); } return document; } public static String getCurrentTimeSubOrAddHour(int hour) { SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); Calendar nowTime = Calendar.getInstance(); nowTime.add(Calendar.HOUR, hour); String datetime = sdf.format(nowTime.getTime()); return datetime; } public static int getDefaultValue(HttpServletRequest request, String paraName, int defaultValue){ int result; try { result=Integer.valueOf(request.getParameter(paraName)); } catch (NumberFormatException e) { result=defaultValue; } return result; } public static String getTimestamp() { Long timestamp = System.currentTimeMillis(); return timestamp.toString(); } /** * 加密算法 */ public static String encode( String str) { String ALGORITHM = "MD5"; char[] HEX_DIGITS = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'}; if (str == null) { return null; } try { MessageDigest messageDigest = MessageDigest.getInstance(ALGORITHM); messageDigest.update(str.getBytes("utf-8")); return getFormattedText(messageDigest.digest()); } catch (Exception e) { throw new RuntimeException(e); } } private static String getFormattedText(byte[] bytes) { int len = bytes.length; StringBuilder buf = new StringBuilder(len * 2); char[] HEX_DIGITS = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'}; // 把密文转换成十六进制的字符串形式 for (int j = 0; j < len; j++) { buf.append(HEX_DIGITS[(bytes[j] >> 4) & 0x0f]); buf.append(HEX_DIGITS[bytes[j] & 0x0f]); } return buf.toString(); } public static String transformID(int id){ String now_id=id+""; int ascValue=0; char[] charInt=now_id.toCharArray(); for(char num:charInt){ int asc=(int)num; ascValue=ascValue+asc; } String now_value=ascValue+random8()+ getTimestamp(); String md5= encode( now_value); return md5; } /** * 产生8位随机数 * @return */ public static String random8(){ int[] i=new int[8]; int count=0; String randomNum=""; while(count<8){ //抽取的数值小于char类型的“z”（122） int t=(int)(Math.random()*122); if((t>=0&t<=9)|(t>=65&t<=90)|(t>=97&t<=122)){ i[count]=t; count++; } }for(int k=0;k<8;k++){ if(i[k]>=0&i[k]<=9){ randomNum=randomNum+i[k]; } else{ randomNum=randomNum+(char)i[k]; } } return randomNum; } public static HttpHeaders setAccessControl(){ HttpHeaders httpHeaders=new HttpHeaders(); httpHeaders.set("Content-Type", "application/json;charset=UTF-8"); httpHeaders.set("Access-Control-Allow-Origin","*"); return httpHeaders; } public static String turnOptionsToJson(String value){ JSONArray dataArray=new JSONArray(); value=value.replace(" ","") .replace(" ","") .replace("\n","") .replace("\t",""); String [] data=value.split("[A|B|C|D|E|F|G|H|Ａ|Ｂ|Ｃ|Ｄ|Ｅ|Ｆ|Ｇ|Ｈ][、|.|．|)|）|:|：]"); for(int i=1;i<data.length;i++){ String item=data[i]; if(item.endsWith("(")||item.endsWith("（")){ item=item.substring(0,item.length()-1); } JSONObject object=new JSONObject(); object.put("num",changeNumToChar(i)); object.put("name",item); dataArray.add(object); } System.out.println(dataArray.toString()); return dataArray.toString(); } public static String changeNumToChar(int i){ switch (i){ case 1: return "A"; case 2: return "B"; case 3: return "C"; case 4: return "D"; case 5: return "E"; case 6: return "F"; case 7: return "G"; case 8: return "H"; default: return "A"; } } public static String getIpAddr(HttpServletRequest request){ String ipAddress = request.getHeader("x-forwarded-for"); if(ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) { ipAddress = request.getHeader("Proxy-Client-IP"); } if(ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) { ipAddress = request.getHeader("WL-Proxy-Client-IP"); } if(ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) { ipAddress = request.getRemoteAddr(); if(ipAddress.equals("127.0.0.1") || ipAddress.equals("0:0:0:0:0:0:0:1")){ //根据网卡取本机配置的IP InetAddress inet=null; try { inet = InetAddress.getLocalHost(); } catch (UnknownHostException e) { e.printStackTrace(); } ipAddress= inet.getHostAddress(); } } //对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割 if(ipAddress!=null && ipAddress.length()>15){ //"***.***.***.***".length() = 15 if(ipAddress.indexOf(",")>0){ ipAddress = ipAddress.substring(0,ipAddress.indexOf(",")); } } return ipAddress; } public static void getTimeSub(){ SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss"); format.setLenient(false); Date date1 = null; try { date1 = format.parse("2018-04-16 10:00:00"); } catch (ParseException e) { e.printStackTrace(); } Date date2 = new Date(); //计算差值，分钟数 long minutes=(date2.getTime()-date1.getTime())/(1000*60); System.out.println(minutes); //计算差值，天数 long days=(date2.getTime()-date1.getTime())/(1000*60*60*24); System.out.println(days); } public static void changeSecondToHHMMSS(){ String result=""; int max_hour=2; int second=3606; int hour=0; int minute=0; if(second>=max_hour*60*60){ result="02:00:00"; }else { if(second>=3600){ hour=second/3600; second=second%3600; if(second>=60){ minute=second/60; second=second%60; } } if(hour<10){ result="0"+hour; }else { result=hour+""; } if(minute<10){ result=result+":0"+minute; }else { result=result+":"+minute; } if(second<10){ result=result+":0"+second; }else { result=result+":"+second; } } System.out.println(result); } /** * 比较两个字符串的大小，按字母的ASCII码比较 * @param pre * @param next * @return * */ public static boolean isMoreThan(String pre, String next){ if(null == pre || null == next || "".equals(pre) || "".equals(next)){ System.out.println("字符串比较数据不能为空！"); return false; } char[] c_pre = pre.toCharArray(); char[] c_next = next.toCharArray(); int minSize = Math.min(c_pre.length, c_next.length); for (int i = 0; i < minSize; i++) { if((int)c_pre[i] > (int)c_next[i]){ return true; }else if((int)c_pre[i] < (int)c_next[i]){ return false; } } if(c_pre.length > c_next.length){ return true; } return false; } public static String deciMal(int top, int below) { double result = new BigDecimal((float)top / below).setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue(); //获取格式化对象 NumberFormat nt = NumberFormat.getPercentInstance(); //设置百分数精确度2即保留两位小数 nt.setMinimumFractionDigits(0); return nt.format(result); } public static Set<Integer> getRandomInt(int limit,int size){ Set<Integer> resultSet=new HashSet<>(); Random random = new Random(); while (resultSet.size()<size){ resultSet.add(random.nextInt(limit)); } /** * set直接转array * Integer [] arr=resultSet.toArray(new Integer[resultSet.size()]); */ /** * set遍历 * Iterator it = resultSet.iterator(); while(it.hasNext()){ System.out.println(it.next()); } */ return resultSet; } /** * 生成指定范围的随机数 */ public static void getLimitRandom() { int max=20; int min=10; Random random = new Random(); int s = random.nextInt(max)%(max-min+1) + min; System.out.println(s); } public static JSONArray treeMenuList(JSONArray menuList, int parentId) { JSONArray childMenu = new JSONArray(); for (Object object : menuList) { JSONObject jsonMenu = (JSONObject)object; int menuId = jsonMenu.getIntValue("thr_gz_id"); int pid = jsonMenu.getIntValue("thr_p_id"); if (parentId == pid) { JSONArray c_node = treeMenuList(menuList, menuId); jsonMenu.put("childNode", c_node); childMenu.add(jsonMenu); } } return childMenu; } //求两个数组的交集 public static String[] intersect(String[] arr1, String[] arr2) { Map<String, Boolean> map = new HashMap<>(); LinkedList<String> list = new LinkedList<String>(); for (String str : arr1) { if (!map.containsKey(str)) { map.put(str, Boolean.FALSE); } } for (String str : arr2) { if (map.containsKey(str)) { map.put(str, Boolean.TRUE); } } for (Map.Entry<String, Boolean> e : map.entrySet()) { if (e.getValue().equals(Boolean.TRUE)) { list.add(e.getKey()); } } String[] result = {}; return list.toArray(result); } //求两个数组的差集 public static String[] minus(String[] arr1, String[] arr2) { LinkedList<String> list = new LinkedList<String>(); LinkedList<String> history = new LinkedList<String>(); String[] longerArr = arr1; String[] shorterArr = arr2; //找出较长的数组来减较短的数组 if (arr1.length > arr2.length) { longerArr = arr2; shorterArr = arr1; } for (String str : longerArr) { if (!list.contains(str)) { list.add(str); } } for (String str : shorterArr) { if (list.contains(str)) { history.add(str); list.remove(str); } else { if (!history.contains(str)) { list.add(str); } } } String[] result = {}; return list.toArray(result); } //求两个数组的差集 public static List<String> getDelValue(String[] targetArray, String[] currentArray) { List<String> result = new ArrayList<>(); for (String t : targetArray) { boolean isOK=true; for (String c : currentArray) { if(t.equals(c)){ isOK=false; break; } } if(isOK){ result.add(t); } } return result; } }
接口返回值封装类Result
package com.ddyg.wx.domain; public class Result { private String message="操作成功"; private Object data; private int count; private boolean status=true; private int code=0; public Result(){ } public Result(Object data, int count){ this.data=data; this.count=count; } public Object getData() { return data; } public void setData(Object data) { this.data = data; } public String getMessage() { return message; } public void setMessage(String message) { this.message = message; } public int getCount() { return count; } public void setCount(int count) { this.count = count; } public boolean isStatus() { return status; } public void setStatus(boolean status) { this.status = status; } public int getCode() { return code; } public void setCode(int code) { this.code = code; } }
一、获取accesstoken（微信开发最基础要求，几乎所有接口都要用到这个参数）
请求链接：https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET
accesstoken每日获取总量有上限，所以这个accesstoken值应该存储起来，不能随意开火。个人一般把这个值存储在ServletContext（域）中，核心代码如下：
public static Result getAccessToken(HttpServletRequest request) { Result result = new Result(); try { //先看一眼全局变量里有没有 String token = (String) request.getServletContext().getAttribute("access_token"); String expiresString = (String) request.getServletContext().getAttribute("expires_time"); LocalDateTime nowTime = LocalDateTime.now(); LocalDateTime expiresTime; //如果全局变量里没有的话,要从新取 if (Utilities.checkNull(token).isEmpty()) { result = getNewWxToken(result, request); } else { //如果全局变量里面有的话,要判断过期了没 expiresTime = LocalDateTime.parse(expiresString, DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")); if (nowTime.isBefore(expiresTime)) { JSONObject resultJO = new JSONObject(); resultJO.put("access_token", token); resultJO.put("expires_time", expiresString); result.setData(resultJO); result.setMessage("请求成功,直接从全局变量里取的值,没有请求微信API"); } else { result = getNewWxToken(result, request,type); } } } catch (Exception e) { result.setMessage(e.getMessage()); result.setStatus(false); } return result; } private static Result getNewWxToken(Result result, HttpServletRequest request) { JSONObject jo = getWxTokenApi(); String token = jo.getString("access_token"); //获取成功了 if (!Utilities.checkNull(token).isEmpty()) { long expiresIn = jo.getLong("expires_in"); LocalDateTime expiresTime = LocalDateTime.now().plusSeconds(expiresIn - 60); String expiresTimeString = expiresTime.format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")); request.getServletContext().setAttribute("access_token"+type, token); request.getServletContext().setAttribute("expires_time"+type, expiresTimeString); JSONObject resultJO = new JSONObject(); resultJO.put("access_token", token); resultJO.put("expires_time", expiresTimeString); result.setData(resultJO); result.setMessage("请求成功,从微信API新请求了一个access_token"); } else { //获取没成功 String errmsg = jo.getString("errmsg"); //看上一步的网络请求成功了没 if (!Utilities.checkNull(errmsg).isEmpty()) { result.setStatus(false); result.setMessage("errcode:" + jo.get("errcode") + " errmsg:" + errmsg); } else { result.setStatus(false); result.setMessage("getWxTokenApi()接口返回数据为空,可能是向微信请求token时网络超时或请求次数达到上限"); } } return result; } private static JSONObject getWxTokenApi() { JSONObject jo = new JSONObject(); String appID = ""; String appSecret =""; String url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=" + appID + "&secret=" + appSecret; Document document= null; try { document = Jsoup.connect(url).ignoreContentType(true).get(); String data=document.select("body").text(); if (!Utilities.checkNull(data).isEmpty()) { jo = JSON.parseObject(data); } } catch (IOException e) { e.printStackTrace(); } return jo; }