Java新字符替换旧字符

Question

Java中如何用输入的新的字符串替换一个旧的字符串，将改变后的文本保存到一个新的文件中。

Answer 1

参考下

        String oldStr = "test";
        Scanner scanner = new Scanner(System.in);
        oldStr = scanner.nextLine();
        File file = new File("D:/tmp", "word.txt"); 
        try {
            if (!file.exists()) {                
                file.createNewFile();
            }
            FileOutputStream output = new FileOutputStream(file);
            output.write(oldStr.getBytes());            
            output.close();
        } catch (IOException e) {
            e.printStackTrace();
        }