package com.nanjing.water.common.util;
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import java.util.Random;
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/**
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* 随机验证码 工具类
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*/
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public final class RandVerifyCode {
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public static final Integer USE_ZERO = 1;
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public static final Integer USE_O = 2;
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public static final Integer USE_ONE = 1;
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public static final Integer USE_I = 2;
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static char[] arrayCharCode = new char[] { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z' };
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static char[] arrayComplexCode = new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z' };
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private RandVerifyCode() {
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throw new IllegalStateException("Utility class");
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}
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/**
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* 生成随机数字
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* @param length 生成长度
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*/
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public static String numberCode(int length) {
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try {
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Thread.sleep(Long.valueOf("1"));
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} catch (Exception e) {
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e.getStackTrace();
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}
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Random random = new Random(CalendarUtil.nowTimestamp());
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StringBuilder sb = new StringBuilder();
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for (int i = 0; i < length; i++) {
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try {
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Thread.sleep(Long.valueOf("1"));
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} catch (Exception e) {}
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sb.append(random.nextInt(Integer.valueOf("10")));
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}
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return sb.toString();
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}
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/**
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* 生成随机字母与数字
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* @param length 生成长度
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*/
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public static String complexCode(int length) {
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return complexCode(length, 2, 2);
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}
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/**
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* 生成随机字母与数字
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* @param length 生成长度
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* @param zeroOrO 为避免视觉歧义,数字零“0”和字母欧“O”如何取舍。取数字零=1,取字母欧=2
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* @param oneOrI 为避免视觉歧义,数字一“1”和字母艾“I”如何取舍。取数字一=1,取字母艾=2
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*/
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public static String complexCode(int length, Integer zeroOrO, Integer oneOrI) {
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int n = arrayComplexCode.length;
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try {
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Thread.sleep(Long.valueOf("1"));
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} catch (Exception e) {
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e.getStackTrace();
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}
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Random random = new Random(CalendarUtil.nowTimestamp());
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StringBuilder sb = new StringBuilder();
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for (int i = 0; i < length; i++) {
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int rnd = random.nextInt(n);
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char code = arrayComplexCode[rnd];
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if('O'==code && USE_ZERO.equals(zeroOrO)) {
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code = '0';
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} else if('0'==code && USE_O.equals(zeroOrO)) {
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code = 'O';
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}
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if('I'==code && USE_ONE.equals(oneOrI)) {
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code = '1';
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} else if('1'==code && USE_I.equals(oneOrI)) {
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code = 'I';
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}
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sb.append(code);
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}
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return sb.toString();
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}
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/**
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* 生成随机纯字母随机数
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* @param length 生成长度
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*/
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public static String charCode(int length) {
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int n = arrayCharCode.length;
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try {
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Thread.sleep(Long.valueOf("1"));
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} catch (Exception e) {
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e.getStackTrace();
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}
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Random random = new Random(CalendarUtil.nowTimestamp());
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StringBuilder sb = new StringBuilder();
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for (int i = 0; i < length; i++) {
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int rnd = random.nextInt(n);
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sb.append(arrayCharCode[rnd]);
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}
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return sb.toString();
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}
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}
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