未报告的异常 java.lang.Exception [重复]

未报告的异常 java.lang.Exception ：必须捕获或声明为抛出。 为什么会出现这个问题呢？有什么简单的方法可以帮助解决这个问题吗？

我在我的java中应用这个代码..

public byte[] encrypt(String message) throws Exception {
    MessageDigest md = MessageDigest.getInstance("md5");
    byte[] digestOfPassword = md.digest("ABCDEABCDE"
                    .getBytes("utf-8"));
    byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);
    for (int j = 0, k = 16; j < 8;) {
            keyBytes[k++] = keyBytes[j++];
    }

    SecretKey key = new SecretKeySpec(keyBytes, "DESede");
    IvParameterSpec iv = new IvParameterSpec(new byte[8]);
    Cipher cipher = Cipher.getInstance("DESede/CBC/PKCS5Padding");
    cipher.init(Cipher.ENCRYPT_MODE, key, iv);

    byte[] plainTextBytes = message.getBytes("utf-8");
    byte[] cipherText = cipher.doFinal(plainTextBytes);
    // String encodedCipherText = new sun.misc.BASE64Encoder()
    // .encode(cipherText);

    return cipherText;
}

public String decrypt(byte[] message) throws Exception {
    MessageDigest md = MessageDigest.getInstance("md5");
    byte[] digestOfPassword = md.digest("ABCDEABCDE"
                    .getBytes("utf-8"));
    byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);
    for (int j = 0, k = 16; j < 8;) {
            keyBytes[k++] = keyBytes[j++];
    }

    SecretKey key = new SecretKeySpec(keyBytes, "DESede");
    IvParameterSpec iv = new IvParameterSpec(new byte[8]);
    Cipher decipher = Cipher.getInstance("DESede/CBC/PKCS5Padding");
    decipher.init(Cipher.DECRYPT_MODE, key, iv);

    byte[] plainText = decipher.doFinal(message);

    return new String(plainText, "UTF-8");
}

错误显示在下面的部分中

byte[] pass = encrypt(password);
String pw = new String(pass);

任何想法？ 我使用 java netbeans 来做我的项目..

Your encrypt()方法抛出一个Exception。这意味着当你调用这个方法时，你应该显式地抛出这个Exception或使用处理它try-catch block.

对于您的情况，对于这个特定的代码：

byte[] pass = encrypt(password);
String pw = new String(pass);

您应该将其包含在：

try{
 byte[] pass = encrypt(password);
 String pw = new String(pass);
}catch(Exception exe){
 //Your error handling code
}

或声明此代码包含在的方法throws Exception.

• 如果您不熟悉异常处理，请考虑阅读以下内容：课程：Java 教程中的异常 http://docs.oracle.com/javase/tutorial/essential/exceptions/index.html

• 另外，这是另一本有趣的读物“异常传播指南（Java）” https://stackoverflow.com/questions/3551221/guidelines-on-exception-propagation-in-java