Class UUIDUtil

src/main/java/cms/utils/UUIDUtil.java:12–174

UUID工具 @author Gao

 *
 */
public class UUIDUtil {

	public static String getUUID22() {   
		UUID uuid = UUID.randomUUID();  
	    StringBuilder sb = new StringBuilder();  
	    sb.append(digits(uuid.getMostSignificantBits() >> 32, 8));  
	    sb.append(digits(uuid.getMostSignificantBits() >> 16, 4));  
	    sb.append(digits(uuid.getMostSignificantBits(), 4));  
	    sb.append(digits(uuid.getLeastSignificantBits() >> 48, 4));  
	    sb.append(digits(uuid.getLeastSignificantBits(), 12));  
	    return sb.toString(); 
    }  
    
    public static String getUUID32() {   
		String uuid = UUID.randomUUID().toString();
		uuid = uuid.replaceAll("-","");//删除横杆
        return uuid;
    }  
    
    
    
   
	final static char[] digits = { '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' };

	final static Map<Character, Integer> digitMap = new HashMap<Character, Integer>();

	static {
		for (int i = 0; i < digits.length; i++) {
			digitMap.put(digits[i], (int) i);
		}
	}

	/**
	 * 支持的最大进制数
	 */
	private static final int MAX_RADIX = digits.length;

	/**
	 * 支持的最小进制数
	 */
	private static final int MIN_RADIX = 2;
	
	
	private static String digits(long val, int digits) {  
	    long hi = 1L << (digits * 4);  
	    return toHex(hi | (val & (hi - 1)), MAX_RADIX)  
	            .substring(1);  
	} 

	/**
	 * 将长整型数值转换为指定的进制数（最大支持62进制，字母数字已经用尽）
	 * 
	 * @param i