发生随机字符串

产生随机字符串

转自：

http://www.iteye.com/topic/477460

?

public class RandomFileName {/** * 产生一个随机的字符串 *  * @param 字符串长度 * @return */public static String getRandomString(int length) {String base = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";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();}public static void main(String[] args) {System.out.println(RandomFileName.getRandomString(5));}}

?或者

public class RandomFileName2 {/** * 产生一个随机的字符串 *  * @param 字符串长度 * @return */public static String getRandomString(int length) {Random random=new Random();StringBuffer sb=new StringBuffer();for(int i=0;i<length;i++){int number=random.nextInt(3);long result=0;switch(number){case 0:result = Math.round(Math.random()*25+65);sb.append(String.valueOf((char)result));break;case 1:result = Math.round(Math.random()*25+97);sb.append(String.valueOf((char)result));break;case 2:sb.append(String.valueOf(new Random().nextInt(10)));break;}}return sb.toString();}public static void main(String[] args) {System.out.println(RandomFileName2.getRandomString(10));}}