Class ToolRandoms

common/src/main/java/pro/tools/data/text/ToolRandoms.java:12–207

随机数类 @author SeanDragon

 * @author SeanDragon
 */
public final class ToolRandoms {
    private ToolRandoms() {
        throw new UnsupportedOperationException("我是工具类，别初始化我。。。");
    }

    /**
     * 定义验证码字符.去除了O、I、l、、等容易混淆的字母
     */
    private static final char[] AUTH_CODE_ALL = {
            'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'J', 'K', 'M', 'N', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y',
            'a', 'c', 'd', 'e', 'f', 'g', 'h', 'k', 'm', 'n', 'p', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y',
            '3', '4', '5', '7', '8'};

    /**
     * 定义验证码数字
     */
    private static final char[] AUTH_CODE_NUMBER = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9'};

    private static final int AUTH_CODE_ALL_LENGTH = AUTH_CODE_ALL.length;
    private static final int AUTH_CODE_NUMBER_LENGTH = AUTH_CODE_NUMBER.length;
    private static final SecureRandom RANDOM = new SecureRandom();

    private final static char[] DIGITS = {    //32位
            '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'
    }, digits_$ = {//64位
            '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',
            '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', '_', '_'
    };

    /**
     * 生成验证码
     */
    public static char getAuthCodeAllChar() {
        return AUTH_CODE_ALL[getNumberRandom(0, AUTH_CODE_ALL_LENGTH)];
    }

    /**
     * 生成验证码，纯数字
     */
    public static String getAuthCodeNumber(int length) {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < length; i++) {
            sb.append(AUTH_CODE_NUMBER[getNumberRandom(0, AUTH_CODE_NUMBER_LENGTH)]);
        }