[英]BufferedReader then write to txt file?
是否可以使用BufferedReader从文本文件中读取,然后在缓冲读取器读取时,同时它还使用PrintWriter将读取的行存储到另一个txt文件中?
If you use Java 7 and want to copy one file directly into another, it is as simple as: 如果您使用Java 7并希望将一个文件直接复制到另一个文件中,则它非常简单:
final Path src = Paths.get(...);
final Path dst = Paths.get(...);
Files.copy(src, dst);
If you want to read line by line and write again, grab src
and dst
the same way as above, then do: 如果你想逐行阅读并再次写,请以与上面相同的方式获取src
和dst
,然后执行:
final BufferedReader reader;
final BufferedWriter writer;
String line;
try (
reader = Files.newBufferedReader(src, StandardCharsets.UTF_8);
writer = Files.newBufferedWriter(dst, StandardCharsets.UTF_8);
) {
while ((line = reader.readLine()) != null) {
doSomethingWith(line);
writer.write(line);
// must do this: .readLine() will have stripped line endings
writer.newLine();
}
}
To directly answer your question: 直接回答你的问题:
you can, and you can also use BufferedWriter to do so. 你可以,你也可以使用BufferedWriter这样做。
BufferedReader br = new BufferedReader(new FileReader(new File("Filepath")));
BufferedWriter bw = new BufferedWriter(new FileWriter(new File("Filepath")));
String l;
while((l=br.readLine())!=null){
... do stuff ...
bw.write("what you did");
}
bw.close();
Yes. 是。 Open the BufferedReader
, and then create a PrintWriter
. 打开BufferedReader
,然后创建PrintWriter
。 You can read from the stream as you write to the writer. 您可以在写入编写器时从流中读取。
If you just need to copy without inspecting the data, then it's a one liner: 如果您只需要在不检查数据的情况下进行复制,那么它就是一个内容:
IOUtils.copy(reader, printWriter); IOUtils.copy(reader,printWriter);
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