如何定义字符串数组java的特殊字符 [英] How to define special characters in string array java

问题描述

我需要定义包含以下所有特殊字符数组。

I need to define an array containing below all special characters..

+ - && || ! ( ) { } [ ] ^ " ~ * ? : \

我用这

List<String> specialCharactersInSolr = Arrays.asList(new String[] {
                "+", "-", "&&", "||", "!", "(", ")", "{", "}", "[", "]", "^",
                "~", "*", "?", ":", });

据接受所有的字符除了和\\

It is accepting all the character except " and \

请帮忙如何界定这两个为好。

Please help how to define these two as well.

推荐答案

\\ 和是特殊字符String类

\ and " are special characters in String class

• 是开始或结束字符串


• \\ 用于创建如新行的某些字符 \\ n \\ r 设置页 \\ t 或你的情况，以逃避特殊字符，如 \\ 和

• " is start or end of String
• \ is used to create some characters like new lines \n \r tab\t or to escape special characters like in your case \ and "

因此​​，为了使他们的文字，你将不得不逃离他们\\\\和\\

So to make them literals you will have to escape them with "\\" and "\""

其他的想法是使用字符[] 而不是的String [] 所以你不会有逃避和你的角色可以写成'或'\\\\'（因为 需要逃避 - 它应该写成'\\'' - \\ 还特别在这里，也将需要转义生产它的字面）。

Other idea is to use Character[] instead of String[] so you wont have to escape " and yours characters can be written as '"' or '\\' (because ' require escaping - it should be written as '\'' - \ is also special here and will also require escaping to produce its literal).

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