寫作和閱讀文件中的Java提供了意想不到的效果

Question

請我有下面的代碼

public String encrypt(String fileToEncrypt) throws Exception{ 
    _cipher.init(Cipher.ENCRYPT_MODE, _keyPair.getPublic()); 
    File inputfile = new File(fileToEncrypt); 
    File outputfile = new File("C:/SECUREFILE".concat("/").concat(FilenameUtils.getName(fileToEncrypt))); 
    FileInputStream inputstream = new FileInputStream(inputfile); 
    FileOutputStream outputStream = new FileOutputStream(outputfile, false); 
    CipherOutputStream cos = new CipherOutputStream(outputStream, _cipher); 
    IOUtils.copy(inputstream, cos); 
    IOUtils.closeQuietly(inputstream); 
    IOUtils.closeQuietly(cos); 
    return outputfile.getPath(); 
} 

的問題是，寫入到磁盤生成的文件始終是0KB一個問題。請問我做錯了什麼

Answer 1

使用IOUtils.closeQuietly（inputstream）和IOUtils.closeQuietly（cos）;關閉流，它應該工作 下面這段代碼對我的作品

public static void main(String[] args) throws Exception { 

    encrypt(new Scanner(System.in).next()); 
} 
public static String encrypt(String fileToEncrypt) throws Exception{ 
    KeyGenerator kgen = KeyGenerator.getInstance("AES"); 
    kgen.init(128); 
    SecretKey _keyPair = kgen.generateKey(); 

    Cipher _cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); 
    _cipher.init(Cipher.ENCRYPT_MODE, _keyPair); 

    File inputfile = new File(fileToEncrypt); 
    File outputfile = new File("D:/SECUREFILE".concat("/").concat(FilenameUtils.getName(fileToEncrypt))); 
    FileInputStream inputstream = new FileInputStream(inputfile); 
    FileOutputStream outputStream = new FileOutputStream(outputfile, false); 
    CipherOutputStream cos = new CipherOutputStream(outputStream, _cipher); 
    IOUtils.copy(inputstream, cos); 
    IOUtils.closeQuietly(inputstream); 
    IOUtils.closeQuietly(cos); 
    return outputfile.getPath(); 
} 

輸入文件內容：dfsdafdsfasdfsadfs

輸出文件的內容：-X‰8q'4ÆZ€'®‡tÈérë/ ű¤®v'rË