Java：使用NIO2写文件时如何追加文件内容呢？

Question

通过以下方式可以写文件

List<String> list = new ArrayList<String>();
list.add("第一行");
list.add("第二行");
list.add("第三行");
 
Path path = Paths.get("E:" + File.separator + "demo.txt");
Files.write(path, list, Charset.forName("UTF-8"));   

但如果想每次执行都追加内容该怎么办呢？

Answer 1

First of all, it is better to write the code above like this (see):

Path path = Paths.get("E:", "demo.txt");
Files.write(path, list, StandardCharsets.UTF_8);

As for appending, just use the APPEND option of StandardOpenOption:

Files.write(path, list, StandardCharsets.UTF_8, StandardOpenOption.APPEND);