大家好，又见面了，我是你们的朋友全栈君。

1 原生的

package com.pibigstar.common.utils;

import java.security.MessageDigest;

/** * MD5加密工具类 * @author pibigstar * */
public class MyMD5Util { 
   
	//盐，用于混交md5
	private static final String slat = "&%5123***&&%%$$#@";
	public static String encrypt(String dataStr) { 
   
		try { 
   
			dataStr = dataStr + slat;
			MessageDigest m = MessageDigest.getInstance("MD5");
			m.update(dataStr.getBytes("UTF8"));
			byte s[] = m.digest();
			String result = "";
			for (int i = 0; i < s.length; i++) { 
   
				result += Integer.toHexString((0x000000FF & s[i]) | 0xFFFFFF00).substring(6);
			}
			return result;
		} catch (Exception e) { 
   
			e.printStackTrace();
		}

		return "";
	}

}

2 使用Spring中的工具类

package com.pibigstar.common.utils;

import org.springframework.util.DigestUtils;

import com.pibigstar.common.Constant;

/** * MD5工具类 * @author pibigstar * */
public class MD5Util { 
   
	//盐，用于混交md5
	private static final String slat = "&%5123***&&%%$$#@";
	/** * 生成md5 * @param seckillId * @return */
	public static String getMD5(String str) { 
   
		String base = str +"/"+slat;
		String md5 = DigestUtils.md5DigestAsHex(base.getBytes());
		return md5;
	}

}