一段 .net 代码 我想用java

public static string SHA256(string inString)
{
string str;
try
{
byte[] bytes = Encoding.UTF8.GetBytes(inString);
byte[] inArray = new SHA256Managed().ComputeHash(bytes);
str = Convert.ToBase64String(inArray, 0, inArray.Length);
}
catch (Exception)
{
throw;
}
return str;
}

http://blog.csdn.net/zhang_chuancun/article/details/4926789