为什么Java将我的角色转换成奇怪的问号？

Question

让我解释一下。我有一个字符串是JoaquÃnTorresGarcÃa然后当我使用上面的代码解析它时，生成的txt文件具有Joa ????形式的相同名称Torres Garc ???? a。我正在使用以下代码将以这种方式组成的字符串写入文本文件：

java.util.Iterator<String> itr = set.iterator();
        int occur = 0;

        File w = new File("newnodes.txt");

                try (BufferedWriter wr = new BufferedWriter(new FileWriter(w))) {
                //String def = "nodedef>name VARCHAR,label VARCHAR";
                //wr.write(def);
                wr.newLine();
                    while (itr.hasNext()) {
                        occur++;
                        String str = (String.valueOf(occur))+","+ (itr.next());
                        wr.write(str);
                        wr.newLine();

                    }
                System.out.println("Node file Created");

Answer 1

使用UTF-8 Writer

File w = new File("newnodes.txt");
try (Writer out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(w), "UTF-8")))     {
//stuff here..