BossUtil - 生成随机字符串

public class BossUtil {
	private static Logger logger=Logger.getLogger(BossUtil.class);
	public static final int nPageSize = 10;
	
	public static final String allChar = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
    public static final String letterChar = "abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNOPQRSTUVWXYZ";
    public static final String numberChar = "023456789";

    /*
     * 获取随机字符串
     */
    public static String generateString(int length){  //参数为返回随机数的长度
		StringBuffer sb = new StringBuffer();
		Random random = new Random();
		for (int i = 0; i < length; i++) {
			sb.append(allChar.charAt(random.nextInt(allChar.length())));
		}
		return sb.toString();
    }
    
    public static String generateNumber(int length){  //参数为返回随机数的长度
		StringBuffer sb = new StringBuffer();
		Random random = new Random();
		for (int i = 0; i < length; i++) {
			sb.append(numberChar.charAt(random.nextInt(numberChar.length())));
		}
		return sb.toString();
    }
    
    
	public static void main(String[] args)
	{
		System.out.print(generateNumber(6));

	}

 。。