返回保存结果

Question

在这段代码中，我对如何返回保存结果感到困惑。我尝试return saveVector;并返回baseDirectory;，但显然我无法将矢量转换为字符串。我是一个编码菜鸟，所以任何帮助都会受到赞赏，我希望你能将这些已经存在的代码分解成碎片。

public String add(String category, Question q) {
    // Get the vector of questions from a category file
    Vector<Question> Q = new Vector<Question>();
    // Add the question object to the vector
    Q.add(q);
    // Save the vector back to the category file
    ObjectOutputStream saveVector = new ObjectOutputStream(new FileOutputStream(baseDirectory));
    // Return the result of the save operation
    return saveVector;
}

Answer 1

public String add(String category, Question q) {
    // Get the vector of questions from a category file
    Vector<Question> Q = new Vector<Question>();
    // Add the question object to the vector
    Q.add(q);
    // Save the vector back to the category file
    ByteArrayOutputStream saveVector = new ByteArrayOutputStream(new FileOutputStream(baseDirectory));
    // Return the result of the save operation
    return new String(saveVector.toByteArray());
}

使用ByteArrayOutputStream代替，并从ByteArrayOutputStream的ByteArray创建一个新的字符串。