MD5加密方法java代码

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
/**
 * MD5加密
 */
public class MD5Utils {
    /**
     * md5加密
     * @param str 要加密的字符串
     * @return    加密后的字符串
     */
    public static String code(String str){
        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.update(str.getBytes());
            byte[]byteDigest = md.digest();
            int i;
            StringBuffer buffer = new StringBuffer("");
            for (int offset = 0; offset < byteDigest.length; offset++){
                i = byteDigest[offset];
                if(i < 0){
                    i += 256;
                }
                if(i < 16) {
                    buffer.append("0");
                }
                    buffer.append(Integer.toHexString(i));
            }
            //32位加密
            return buffer.toString();
            //16位加密
            //return buffer.toString().substring(8, 24);
        }catch (NoSuchAlgorithmException e){
            e.printStackTrace();
            return null;
        }
    }
}

来源：CSDN

作者：爱编程的小哥哥

链接：https://blog.csdn.net/JIANtype/article/details/103858259