文件路径问题:/-> \ [英] File path issue with: / -> \

问题描述

            // Dividend Limit check or increase the Dividend
        if (dival == 10) {
            writer.println("Divident has reached it Limit !");
            i++;
            // update the file name
            String upath = "channel_" + i;
            System.out.println(path);
            // find channel_1 and replace with the updated path
            if (path.contains("channel_1")) {
                path = "D:/File Compression/Data/low_freq/low_freq/house_1/"
                        + upath + ".dat";
            } else {
                JOptionPane.showMessageDialog(null, "Invalid File Choosen");
                System.exit(0);
            }

            dival = 10;

        } else {
            dival = dival + 10;
            writer.println("Dividen:" + dival);
        }

这些行是递归方法.第一次给出正确的路径:

these lines are in a recursive method. first time it gives right path:

D:/File Compression/Data/low_freq/low_freq/house_1/channel_2.dat

但是在第二次调用时，它将正斜杠翻转为反斜杠:

But on the second call it flips the forward slash to back slash:

D:\File Compression\Data\low_freq\low_freq\house_1\channel_1.dat

如果我不使用该条件，它将很好地工作.

it works fine if I do not use the condition.

if(path.contains("channel_"))

推荐答案

\ 在Java中被称为转义序列，其用途广泛.

\ is called as Escape sequence in java which is used in various purposes .

在您的情况下，请使用File.separator

In your case use File.separator

String path = "D:"+File.separator+"File Compression"+File.separator+"Data"+File.separator+"low_freq"+File.separator+"low_freq"+File.separator+"house_1"+File.separator;

使用双斜杠 \\ ！这是一种特殊的逃生模式.像\ n或\ r.
转义序列，通常在Windows的文本文件中使用，特别是在记事本中.

Use double slash \\ ! It's a special escape pattern. Like \n or \r.
Escape sequence normally used in text files in Windows, specially in notepad.

下面列出了主要的Java转义序列.它们用于表示非图形字符以及诸如双引号，单引号和反斜杠之类的字符.如果要在字符串文字中表示双引号，则可以用\表示.如果要在字符文字中表示单引号，则可以用\'表示.

The primary Java escape sequences are listed below. They are used to represent non-graphical characters and also characters such as double quotes, single quotes, and backslashes. If you'd like to represent a double quote within a String literal, you can do so with \". If you'd like to represent a single quote within a character literal, you can do so with \'.

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