SHA1解密

public static boolean decryptSha1(String src,byte[] desc) // 如果这里传入的是byte[] 转换后的字符串，则再转为字符串比较后，会匹配不成功
{
// MessageDigest sha1 = MessageDigest.getInstance("sha-1");
try
{
java.security.MessageDigest algb=java.security.MessageDigest.getInstance("sha-1");
algb.update(src.getBytes());
if (algb.isEqual(desc,algb.digest()))
{
System.out.println("信息检查正常");
return true;
}
else
{
System.out.println("摘要不相同");
}
}
catch (java.security.NoSuchAlgorithmException ex) {
System.out.println("非法摘要算法");
}
return false;
}