除了base 64编码位（你提到的是测试）外，你的代码还不错，输出可能没有意义的原因是你显示的是原始字节数组（对字节数组执行toString（）返回其内部Java引用，不是的字符串表示的内容）。这是一个清理过的版本，并输出“ kyle boon”作为解码后的字符串：
import java.security.MessageDigest;import java.util.Arrays;import javax.crypto.Cipher;import javax.crypto.SecretKey;import javax.crypto.spec.IvParameterSpec;import javax.crypto.spec.SecretKeySpec;public class TripleDESTest { public static void main(String[] args) throws Exception { String text = "kyle boon"; byte[] predtext = new TripleDESTest().encrypt(text); String depredtext = new TripleDESTest().decrypt(predtext); System.out.println(predtext); // this is a byte array, you'll just see a reference to an array System.out.println(depredtext); // This correctly shows "kyle boon" } public byte[] encrypt(String message) throws Exception { final MessageDigest md = MessageDigest.getInstance("md5"); final byte[] digestOfPassword = md.digest("HG58YZ3CR9" .getBytes("utf-8")); final byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24); for (int j = 0, k = 16; j < 8;) { keyBytes[k++] = keyBytes[j++]; } final SecretKey key = new SecretKeySpec(keyBytes, "DESede"); final IvParameterSpec iv = new IvParameterSpec(new byte[8]); final Cipher cipher = Cipher.getInstance("DESede/CBC/PKCS5Padding"); cipher.init(Cipher.ENCRYPT_MODE, key, iv); final byte[] plainTextBytes = message.getBytes("utf-8"); final byte[] cipherText = cipher.doFinal(plainTextBytes); // final String enpredCipherText = new sun.misc.base64Enprer() // .enpre(cipherText); return cipherText; } public String decrypt(byte[] message) throws Exception { final MessageDigest md = MessageDigest.getInstance("md5"); final byte[] digestOfPassword = md.digest("HG58YZ3CR9" .getBytes("utf-8")); final byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24); for (int j = 0, k = 16; j < 8;) { keyBytes[k++] = keyBytes[j++]; } final SecretKey key = new SecretKeySpec(keyBytes, "DESede"); final IvParameterSpec iv = new IvParameterSpec(new byte[8]); final Cipher decipher = Cipher.getInstance("DESede/CBC/PKCS5Padding"); decipher.init(Cipher.DECRYPT_MODE, key, iv); // final byte[] encData = new // sun.misc.base64Deprer().depreBuffer(message); final byte[] plainText = decipher.doFinal(message); return new String(plainText, "UTF-8"); }}
