如何在Java中转义“\”字符

As we all know,we can use

众所周知,我们可以使用

string aa=@"E:\dev_workspace1\AccessCore\WebRoot\DataFile"

in c# in order not to double the '\'.

在c#中为了不加倍'\'。

But how to do in java?

但是在java中该怎么办?

5 个解决方案

#1

Unfortunately, there is no full-string escape operator in Java. You need to write the code as:

不幸的是,Java中没有全字符串转义运算符。您需要将代码编写为:

String aa = "E:\\dev_workspace1\\AccessCore\\WebRoot\\DataFile";

#2

There is no whole string escape operator but, if it's for file access, you can use a forward slash:

没有完整的字符串转义运算符,但是,如果它是用于文件访问,则可以使用正斜杠:

String aa="E:/dev_workspace1/AccessCore/WebRoot/DataFile";

Windows allows both forward and backward slashes as a path separator. It won't work if you pass the path to an external program that mangles with it and fails, but that's pretty rare.

Windows允许向前和向后斜杠作为路径分隔符。如果你将路径传递给一个随之破坏并失败的外部程序,它将无法工作,但这种情况非常罕见。

#3

Might not be a direct answer to your question, but I feel this should be pointed out:

可能不是你问题的直接答案,但我觉得应该指出:

There's a system-dependent default name-separator character.

有一个依赖于系统的默认名称分隔符。

#4

The really system-independent way is to do this:

真正与系统无关的方法是这样做:

String aa = "E:/dev_workspace1/AccessCore/WebRoot/DataFile";
String output = aa.replace('/', File.separatorChar);

It will give you "E:\dev_workspace1\AccessCore\WebRoot\DataFile" on Windows and "E:/dev_workspace1/AccessCore/WebRoot/DataFile" just about everywhere else.

它将在Windows上提供“E:\ dev_workspace1 \ AccessCore \ WebRoot \ DataFile”,并在其他任何地方提供“E:/ dev_workspace1 / AccessCore / WebRoot / DataFile”。

#5

If you write a path, you should use the '/' as path-separator under Java. The '/' is the official path-separator under Java and will be converted to the appropriate separator for the platform (\ under windows, / under unix). The rest of the string is unchanged if passed to the system, so the '\' also works under windows. But the correct way to represent this path is "E:/dev_workspace1/AccessCore/WebRoot/DataFile".

如果编写路径,则应在Java下使用“/”作为路径分隔符。 '/'是Java下的官方路径分隔符,将被转换为平台的适当分隔符(\ windows下的\,unix下的/)。如果传递给系统,字符串的其余部分将保持不变,因此'\'也可以在Windows下工作。但表示此路径的正确方法是“E:/ dev_workspace1 / AccessCore / WebRoot / DataFile”。

If you want to represent a '\' in a Java-String you have to escape it with another one: "This String contains a \".

如果要在Java-String中表示'\',则必须使用另一个转义它:“此字符串包含\”。

#1