Java使用UTF-8读取和写入文件到文件

Question

我正在创建一个类似日语字典的程序,所以我需要将日文单词对象存储在一个文件中.我目前正在尝试创建一个无线编码的dat文件,但我一直在获取FileNotFound Exceptions.我的主要目标是能够将我自定义创建的单词对象存储在一个文件中,该文件可以存储和读取包含日文文本和值数组的对象.所以如果你知道无论如何要解决这个问题,我将非常感激!

这是我的试用课来测试它:

  public class JavaApplication1 {

/**
 * @param args the command line arguments
 */
Scanner scan = new Scanner(System.in);
//File file = new File("test.dat");
public static void main(String[] args) throws FileNotFoundException, IOException,    ClassNotFoundException {
    // TODO code application logic here
    JavaApplication1 ja = new JavaApplication1();
    ja.start();
}
public void start() throws FileNotFoundException, IOException, ClassNotFoundException{

    System.out.println("Enter Kanji");
    String Kanji = scan.next();
    System.out.println("Enter Romanji");
    String Romanji = scan.next();
    System.out.println("How common is it");
    int common = scan.nextInt();
    System.out.println("How many types of word is it?");
    int loop = scan.nextInt();
    //List<int> typeOfWord = new ArrayList<int>();
    ArrayList type = new ArrayList();
    for(int i = 0; i<loop;i++){
        System.out.println("What type of word");
        type.add(scan.nextInt());
    }
    System.out.println("What type of adjective");
    int adjective = scan.nextInt();
    System.out.println("What type of verb");
    int verb = scan.nextInt();
    System.out.println("How many radicals");
    int loop2 = scan.nextInt();
     ArrayList radical = new ArrayList();
    for(int i = 0; i<loop2;i++){
        System.out.println("radical");
        radical.add(scan.nextInt());
    }
    Word word = new Word(Kanji,Romanji,common,type,adjective,verb,radical);
    store(word);
    //store(word);
    read();

}
public void store(Word word) throws FileNotFoundException, IOException{
    File file = new File("test.dat","UTF-8");
    FileOutputStream outFileStream = new FileOutputStream(file);
    ObjectOutputStream oos = new ObjectOutputStream(outFileStream);
    oos.writeObject(word);
    oos.close();
}
public void read() throws FileNotFoundException, IOException, ClassNotFoundException{
    File file = new File("test.dat");
    FileInputStream filein = new FileInputStream(file);
    ObjectInputStream ois = new ObjectInputStream(filein);
    Word word = (Word)ois.readObject();
    ois.close();
    word.getKanaKanji();
}
}

这是我用来获取我的Word对象的值的类,这是我的单词类:

  public Word(){

}
public Word(String kanaKanji, String romanji, int commonType, ArrayList wordTypeList,
        int adjectiveType, int verbType, ArrayList radicalList){
    this.wordTypeList = wordTypeList;
    this.radicalList = radicalList;
    this.adjectiveType = adjectiveType;
    this.commonType = commonType;
    this.verbType = verbType;
    this.kanaKanji = kanaKanji;
    this.romanji = romanji;

}
//slew of get methods
public String getKanaKanji(){
 return kanaKanji;   
}
public String getRomanji(){
    return romanji;
}
public StringBuilder getDefinition(){
    int size = definitionList.size();
    StringBuilder definitions = new StringBuilder();
    for(int i = 0; i <definitionList.size();i++){
        definitions.append((i+1)+"."+definitionList.indexOf(i) +"\n");
    }
    return definitions;
}
}

从这两个类我想要存储和读取文件中创建的单词对象,但我无法找出最方便的方法.

Answer 1

File file = new File("test.dat","UTF-8");

应该只是

File file = new File("test.dat");

该文件是二进制文件(Java对象).内部字符串将保留为Unicode - 没有问题.

new File(("test.dat","UTF-8");实际上是new File("test.dat/UTF-8")并期待一个目录test.dat.因此FileNotFound.见文件.