使用单个反斜杠替换双反斜杠 [英] Replacing double backslashes with single backslash

问题描述

我有一个字符串\\\\<，它属于UTF-8字符集。我无法将其解码为unicode，因为存在双反斜杠。如何从\\\\<获取\\\<？我使用的是java。

I have a string "\\u003c", which belongs to UTF-8 charset. I am unable to decode it to unicode because of the presence of double backslashes. How do i get "\u003c" from "\\u003c"? I am using java.

我尝试过，

myString.replace("\\\\", "\\");

但无法达到我想要的效果。

but could not achieve what i wanted.

这是我的代码，

String myString = FileUtils.readFileToString(file);
String a = myString.replace("\\\\", "\\");
byte[] utf8 = a.getBytes();

// Convert from UTF-8 to Unicode
a = new String(utf8, "UTF-8");
System.out.println("Converted string is:"+a);

，文件内容为

\\\<

\u003c

推荐答案

寻找您的问题的解决方案（因为您有一个接受的答案），但我仍然会添加我的答案作为声明的问题的可能的解决方案：

Not sure if you're still looking for a solution to your problem (since you have an accepted answer) but I will still add my answer as a possible solution to the stated problem:

String str = "\\u003c";
Matcher m = Pattern.compile("(?i)\\\\u([\\da-f]{4})").matcher(str);
if (m.find()) {
    String a = String.valueOf((char) Integer.parseInt(m.group(1), 16));
    System.out.printf("Unicode String is: [%s]%n", a);
}

OUTPUT：

OUTPUT:

Unicode String is: [<]

这里是上述代码的在线演示

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