1.maven引入codec和commons依赖:

       
      
       commons-codec
        
      
       commons-codec
        
      
       1.9
      
     
       
      
       org.apache.commons
        
      
       commons-lang3
        
      
       3.4
      
     

2.util新建secrity包放入Digests.java、Encodes.java和Exceptions.java工具类

3.ValidateUtil:

public class ValidateUtil {    public static final String HASH_ALGORITHM = "SHA-1";    public static final int HASH_INTERATIONS = 1024;    public static final int SALT_SIZE = 8;    /**     * @param plainPassword     * @return password 加密密码(生成安全的密码，生成随机的16位salt并经过1024次 sha-1 hash)     */    public static String entryptPassword(String plainPassword) {        byte[] salt = Digests.generateSalt(SALT_SIZE);        byte[] hashPassword = Digests.sha1(plainPassword.getBytes(), salt, HASH_INTERATIONS);        return Encodes.encodeHex(salt) + Encodes.encodeHex(hashPassword);    }    /**     * @param plainPassword     * @param password     * @return boolean 解密判断密码是否正确     */    public static boolean validatePassword(String plainPassword, String password) {        byte[] salt = Encodes.decodeHex(password.substring(0, 16));        byte[] hashPassword = Digests.sha1(plainPassword.getBytes(), salt, HASH_INTERATIONS);        return password.equals(Encodes.encodeHex(salt) + Encodes.encodeHex(hashPassword));    }}