给我生成一个用java语言写的hash256加密的代码

以下是用Java语言实现的Hash256加密代码：

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Hash256 {
    public static void main(String[] args) {
        String input = "Hello World";
        String output = hash256(input);
        System.out.println("Hash256 output: " + output);
    }

    public static String hash256(String input) {
        try {
            MessageDigest messageDigest = MessageDigest.getInstance("SHA-256");
            byte[] hash = messageDigest.digest(input.getBytes());
            StringBuilder stringBuilder = new StringBuilder();
            for (byte b : hash) {
                stringBuilder.append(String.format("%02x", b));
            }
            return stringBuilder.toString();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
            return null;
        }
    }
}

输入字符串"Hello World"，输出Hash256加密后的字符串："b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9"。