md5加盐加密

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package org.security;   import org.apache.commons.codec.digest.DigestUtils;   import java.util.UUID;   /**  * @author 50649  */ public class SecurityUtil {     /**      * 加盐加密      *      * @param password      * @return      */     public static String encrypt(String password) {         // 每次生成内容不同的，但长度固定 32 位的盐值         String salt = UUID.randomUUID().toString().replace("-", "");         // 最终密码=md5(盐值+原始密码)         String finalPassword = DigestUtils.md5Hex((salt + password).getBytes());         return salt + finalPassword;     }       /**      * 密码验证      *      * @param password      待验证密码      * @param finalPassword 最终正确的密码（数据库中加盐的密码）      * @return      */     public static boolean decrypt(String password, String finalPassword) {         // 非空效验         if (null == password || null == finalPassword) {             return false;         }         if (finalPassword.length() != 64) {             // 最终密码不正确             return false;         }         // 盐值         String salt = finalPassword.substring(0, 32);         // 使用盐值+待确认的密码生成一个最终密码         String securityPassword = DigestUtils.md5Hex((salt + password).getBytes());         System.out.println("securityPassword=="+securityPassword);         // 使用盐值+最终的密码和数据库的真实密码进行对比         return (salt + securityPassword).equals(finalPassword);     }       public static void main(String[] args) {         String password = "123";   //        System.out.println(SecurityUtil.encrypt(password)); // 4d94e438ab74495a8bb2fea0bf96887d9222409880242be59dbda7265d64418b //        System.out.println(SecurityUtil.encrypt(password)); // 942890192ad04369a1667b2b0308a2640d052e9b17d422ec8e7925e81af95470 //        System.out.println(SecurityUtil.encrypt(password)); // b8fdcdbc855a41afa7d0135304bd826e025f7d140c66342f69833578d2d64776           System.out.println(SecurityUtil.decrypt(password, "4d94e438ab74495a8bb2fea0bf96887d9222409880242be59dbda7265d64418b"));         System.out.println(SecurityUtil.decrypt(password, "942890192ad04369a1667b2b0308a2640d052e9b17d422ec8e7925e81af95470"));         System.out.println(SecurityUtil.decrypt(password, "b8fdcdbc855a41afa7d0135304bd826e025f7d140c66342f69833578d2d64776"));       }   }