Java 对象序列化 java.io.UTFDataFormatException

Question

我有一个对象，我想序列化成字节码:

public class objektserial implements Serializable {

private static final long serialVersionUID = 1L;
private String msg ="";
private LinkedList<String> stringlist = new LinkedList<String>();

public objektserial(String nachricht) {
this.msg = nachricht;
this.stringlist = new LinkedList<String>();
}

public objektserial(){      
}

public String getMsg(){
return msg;
}

public void setList(LinkedList<String> list){
this.stringlist = list;
}
}  

我的想法:1.序列化2.加密字节码3.加密字节码4.反序列化

   // Serialization
objektserial os = new objektserial(textField.getText());
LinkedList<String> list = new LinkedList<String>();
for (int i = 0; i < 10; i++)
    list.add("String Nr. " + i);
os.setList(list);

try {
    FileOutputStream file = new FileOutputStream("objekt.objs");
    ObjectOutputStream o = new ObjectOutputStream(file);
    o.writeObject(os);
    o.close();
} catch (IOException ex) {
    System.err.println(e);
}

// Encrypt
try {
    BufferedReader in = new BufferedReader(new FileReader("objekt.objs"));
    String s = "";
    String text = "";
    while ((s = in.readLine()) != null) {
        text += s;
    }
    String passwordEnc = AESencrp.encrypt(text);
    String passwordDec = AESencrp.decrypt(passwordEnc);
    File file = new File("objekt.objs");
    FileWriter fw = new FileWriter(file, false);
    BufferedWriter writer = new BufferedWriter(fw);

    writer.write(passwordEnc);

    writer.close();

    System.out.println("Plain Text : " + text);
    System.out.println("Encrypted Text : " + passwordEnc);
    System.out.println("Decrypted Text : " + passwordDec);
    } catch (Exception eiasdasd) {
    }

// Decrypt
try {
        BufferedReader in = new BufferedReader(new FileReader("objekt.objs"));
    String s = "";
    String text = "";
    while ((s = in.readLine()) != null) {
        text += s;
    }
    String passwordDec = AESencrp.decrypt(text);
    File file = new File("objekt.objs");
    FileWriter fw = new FileWriter(file, false);
    BufferedWriter writer = new BufferedWriter(fw);

    writer.write(passwordDec);

    writer.close();

    System.out.println("Plain Text : " + text);
    System.out.println("Encrypted Text : " + text);
    System.out.println("Decrypted Text : " + passwordDec);
} catch (Exception eiasdasd) {
}

// Read&Dezerialize
try {
FileInputStream file = new FileInputStream("objekt.objs");
ObjectInputStream o = new ObjectInputStream(file);
objektserial obs = (objektserial) o.readObject();
o.close();
textField_1.setText(obs.getMsg());
} catch (IOException e) {
    System.err.println(e);
} catch (ClassNotFoundException e) {
    System.err.println(e);
}

这很好用，但是如果我的序列化对象太大(超过一行，如果我用 Notepad++ 打开字节码文件)，我会得到一个 "java.io.UTFDataFormatException"。

当我尝试反序列化并再次读取解密的文件时，我得到了 java.io.UTFDataFormatException...

我该怎么做才能解决这个问题？

Answer 1

您正在使用 ObjectStream.writeObject() 编写。您需要使用 ObjectInputStream.readObject() 进行读取。

序列化对象不是线条。它们也不是字符数据，这排除了读者。