JAVA中MD5加密（MD5工具类）

Bertha 。 2022-05-27 06:29 337阅读 0赞

**工具类如下：**

import java.security.MessageDigest;
    
    /** * @Author:Starry * @Description: * @Date:Created in 9:46 2018/4/13 * Modified By: */ public class MD5Utils {
    
        private static final String hexDigIts[] = {
      "0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f"};
    
        /** * MD5加密 * @param origin 字符 * @param charsetname 编码 * @return */ public static String MD5Encode(String origin, String charsetname){
            String resultString = null;
            try{
                resultString = new String(origin);
                MessageDigest md = MessageDigest.getInstance("MD5");
                if(null == charsetname || "".equals(charsetname)){
                    resultString = byteArrayToHexString(md.digest(resultString.getBytes()));
                }else{
                    resultString = byteArrayToHexString(md.digest(resultString.getBytes(charsetname)));
                }
            }catch (Exception e){
            }
            return resultString;
        }
    
    
        public static String byteArrayToHexString(byte b[]){
            StringBuffer resultSb = new StringBuffer();
            for(int i = 0; i < b.length; i++){
                resultSb.append(byteToHexString(b[i]));
            }
            return resultSb.toString();
        }
    
        public static String byteToHexString(byte b){
            int n = b;
            if(n < 0){
                n += 256;
            }
            int d1 = n / 16;
            int d2 = n % 16;
            return hexDigIts[d1] + hexDigIts[d2];
        }
    
    }

结果如下：

String password = "starry12345";
    String password2 = MD5Utils.MD5Encode(password,"utf8");

![70][]

[70]: /images/20220527/684452bd1e214f9da2de3676ee4c3061.png