字符串生成器工具类(待完善)

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import java.text.SimpleDateFormat;import java.util.Date;import java.util.Random;/** * @文件名：GeneratorUtils.java * @作用： * @作者：张剑 * @创建时间：2014-2-12 */public class ZJ_GeneratorUtils {private static int i = 0;public static String idGenerator() {String str = new SimpleDateFormat("yyyyMMddhhmmssSSS").format(new Date());str = Long.toString(Long.valueOf(str), 36);i = i < 35 ? ++i : 0;str += Long.toString(i, 36);return str;}// length表示生成字符串的长度public static String getRandomString(int length) {String base = "abcdefghijklmnopqrstuvwxyz0123456789";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();}// length表示生成字符串的长度public static String getRandomNumString(int length) {String base = "0123456789";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();}// length表示生成数字的位数public static Long getRandomNum(int length) {return (long) (Math.pow(10, length - 1) + 9 * Math.random() * Math.pow(10, length - 1));}public static void main(String[] args) {for (int i = 0; i < 100; i++) {System.out.println(getRandomNum(6));// System.out.println(idGenerator());}}}
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