Java，删除字符串对象中的反斜杠
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Java, Removing backslash in string object
提问by Kotibab
I have a URL like this: http:\/\/www.example.com\/examplein a string object.
我有一个这样的 URL：http:\/\/www.example.com\/example在一个字符串对象中。
Can somebody tell me, how to remove the backslashes?
有人可以告诉我，如何删除反斜杠？
I am programming for an blackberry system.
我正在为黑莓系统编程。
回答by Kevin Gaudin
See String.replace(CharSequence, CharSequence)
见String.replace(CharSequence, CharSequence)
String myUrl = "http:\/\/www.example.com\/example";
myUrl = myUrl.replace("\","");
回答by Stephen C
@Kevin's answer contains a fatal problem. The String.replace(char, char)replaces occurrences of one character with another character. It does not remove characters.
@Kevin 的回答包含一个致命的问题。在String.replace(char, char)用其他字符替换一个字符的出现。它不会删除字符。
Also ''is not valid Java because there is no such thing as an empty character.
还''没有有效的Java因为有一个空字符没有这样的事情。
Here are some solutions that should actually work (and compile!):
以下是一些应该实际工作（并编译！）的解决方案：
String myUrl = "http:\/\/www.example.com\/example";
fixedUrl = myUrl.replace("\", "");
This simply removes every backslash without considering the context.
这只是在不考虑上下文的情况下删除了每个反斜杠。
fixedUrl = myUrl.replace("\/", "/");
This replaces escaped forward slashes with plain forward slashes.
这用普通的正斜杠替换了转义的正斜杠。
fixedUrl = myUrl.replaceAll("\\(.)", "\1");
This "de-escapes" anyescape sequences in the String, correctly handling escaped backslashes, and not removing a trailing backslash. This version uses a group to capture the character after the backslash, and then refers to it in the replacement string.
这会“取消转义”字符串中的任何转义序列，正确处理转义的反斜杠，而不是删除尾随的反斜杠。此版本使用一组捕获反斜杠后的字符，然后在替换字符串中引用它。
Note that in the final case we are using the replaceAllmethod that does regex match / replace, rather than literal String match / replace. Therefore, we need to escape the backslash in the first argument twice; once because a backslash must be escaped in a String literal, and once because a backslash must be escaped in a regex if you want it to stand for a literal backslash character.
请注意，在最后一种情况下，我们使用的replaceAll是正则表达式匹配/替换的方法，而不是文字字符串匹配/替换。因此，我们需要对第一个参数中的反斜杠进行两次转义；一次是因为反斜杠必须在字符串文字中转义，一次是因为反斜杠必须在正则表达式中转义，如果您希望它代表文字反斜杠字符。
I am programming for an blackberry system, in case that is of any relevance.
我正在为黑莓系统编程，以防万一。
It is. Blackberry is a J2ME platform, and the J2ME version of String(see javadoc) onlysupports String.replace(char, char), which (as we noted above) cannot remove characters. On a J2ME platform you need to load the Stringinto a StringBuffer, and use a loop and StringBuffer.delete(...)or StringBuffer.replace(...).
它是。Blackberry 是一个 J2ME 平台，J2ME 版本String（见javadoc）只支持String.replace(char, char)，它（正如我们上面提到的）不能删除字符。在 J2ME 平台上，您需要将 加载String到 a 中StringBuffer，并使用循环 andStringBuffer.delete(...)或StringBuffer.replace(...)。
(It is stuff like this that makes Android easier to use ...)
（正是这样的东西让 Android 更易于使用......）
回答by Luis Enrique Díaz
Try this:
试试这个：
return myUrl.replaceAll("\\(.)", "\/");
回答by Jyotman Singh
Only this works for me -
只有这对我有用-
String url = "http:\/\/imgd2.aeplcdn.com\/310x174\/cw\/cars\/ford\/ford-figo-aspire.jpg";
for(int i = 0; i < url.length(); i++)
if(url.charAt(i) == '\')
url = url.substring(0, i) + url.substring(i + 1, url.length());
