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package com.app.common.utils;

import java.security.MessageDigest;

/**
 * MD5
 * @Description: TODO
 * @author lq.
 * @date 2020年1月6日 下午4:56:46 
 * @ClassName: MD5Utils
 *
 */
public class MD5Utils {
	
	private static final char HEX_DIGITS[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };  
	
	private static String toHexString(byte[] b) {  
        StringBuilder sb = new StringBuilder(b.length * 2);  
        for (int i = 0; i < b.length; i++) {  
            sb.append(HEX_DIGITS[(b[i] & 0xf0) >>> 4]);  
            sb.append(HEX_DIGITS[b[i] & 0x0f]);  
        }  
        return sb.toString();  
    }  
      
    public static String Bit32(String SourceString) throws Exception {  
        MessageDigest digest = MessageDigest.getInstance("MD5");
        digest.update(SourceString.getBytes());  
        byte messageDigest[] = digest.digest();  
        return toHexString(messageDigest);  
    }
    
    public static String Bit16(String SourceString) throws Exception {  
        return Bit32(SourceString).substring(8, 24);  
    }
}