package util; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Random; import tea.service.SMS; /** * @author zcq * @version 创建时间:2015-5-5 上午11:39:21 * 根据随机数和时间戳生成唯一id */ public class RandTimeUid { public static String getUid(){ StringBuffer sb = new StringBuffer(); long id=(long)((Math.random()*9+1)*100000); String num = String.format("%06d", id); sb.append(num); SimpleDateFormat df = new SimpleDateFormat("yyMMddHHmm"); sb.append(df.format(new Date())); Random random = new Random(); sb.append(random.nextInt(100)+10); return sb.toString(); } public static String getKey(String uid){ String key = SMS.md5(uid); return key; } public static String getCharAndNumr(int length) { String val = ""; Random random = new Random(); for(int i = 0; i < length; i++) { String charOrNum = random.nextInt(2) % 2 == 0 ? "char" : "num"; // 输出字母还是数字 if("char".equalsIgnoreCase(charOrNum)) // 字符串 { int choice = random.nextInt(2) % 2 == 0 ? 65 : 97; //取得大写字母还是小写字母 val += (char) (choice + random.nextInt(26)); } else if("num".equalsIgnoreCase(charOrNum)) // 数字 { val += String.valueOf(random.nextInt(10)); } } return val; } public static void main(String[] args) { /*String uid = RandTimeUid.getUid(); System.out.println(uid);*/ String secret = getCharAndNumr(32); System.out.println(secret); } }
java生成client_id和生成随机数字和字母组合client_secret
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转载自zihai367.iteye.com/blog/2220066
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