如何将文件中的文本“\n”解读为换行符?

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英文:

How to read “\n” text in file as a newline?

问题


这一行用于测试。
测试测试测试。


以下是我在Java中读取这行内容的方式:

```java
import java.util.List;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.io.IOException;

class Main {
  public static void main(String[] args) {
    List<String> list = null;
    try {
      list = Files.readAllLines(Paths.get("文本文件路径"));
    } catch (IOException e) {
      e.printStackTrace();
    }
    String[] Array = list.toArray(new String[list.size()]);
  }
}

当我使用System.out.print(Array[0]);进行输出时,我得到以下结果:这一行用于测试。\n测试测试测试。

我希望结果如下所示:

这一行用于测试。
测试测试测试。

<details>
<summary>英文:</summary>

My text file contains this 1 line

```This line is used for testing.\nTesting testing testing.```

And this is how I read that line in Java

import java.util.List;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.io.IOException;

class Main {
public static void main(String[] args) {
List<String> list = null;
try {
list = Files.readAllLines(Paths.get("path to txt file"));
} catch (IOException e) {
e.printStackTrace();
}
String[] Array = list.toArray(new String[list.size()]);
}
}

And when I print it out with System.out.print(Array[0]); I get this as a result: ```This line is used for testing.\nTesting testing testing.```

I want the result to be like this:

```This line is used for testing.```

```Testing testing testing.```





</details>


# 答案1
**得分**: 1

如果您想要这样的行为,最好的方法是在您的代码中实现它:

```java
list = Files.readAllLines(Paths.get(""))
                    .stream()
                    .flatMap(line -> Arrays.stream(line.split("\\n")))
                    .collect(Collectors.toList());

这段代码会读取文件,就像您之前所做的一样,并将\n解释为新的换行符。这是我找到的唯一方法。

英文:

If you want such behavior, the best way is to implement this in your code:

list = Files.readAllLines(Paths.get(&quot;&quot;))
                    .stream()
                    .flatMap(line -&gt; Arrays.stream(line.split(&quot;\\\\n&quot;)))
                    .collect(Collectors.toList());

This read the files, like you did, plus it interprets the \n to give you new Lines every time.

That's the only way I've found

答案2

得分: 0

Sure, here is the translation of the provided text:

在文本文件中键入\n并不会产生换行,而是会产生单独的字符\n。如果您想要添加换行,并使您的程序打印出带有该换行的文本,您需要实际插入换行(即按下回车键)。

如果您希望使您的程序能够理解转义字符(将\n处理为换行符),您需要自己添加该逻辑。最简单的方法是遍历每个字符,如果一个字符是\,则根据下一个字符进行处理。在您的情况下,一旦您看到\后跟着n,请删除这两个字符并在其位置插入换行。

英文:

Typing \n in a text file doesn't give you a newline, it gives you the individual characters \ and n. If you want to add a newline and have your program print out the text with that newline, you'll have to actually insert a newline (ie. press enter).

If you want to make your program be able to understand escaped characters (process \n as a newline), you'd have to add that logic yourself. The simplest way would be to iterate over each character and if a character is \, process according to the next character. In your case, once you see \ followed by n, delete those two characters and insert a newline in their place.

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  • 本文由 发表于 2020年7月31日 00:20:10
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