从字符串中删除某些字符 [英] Removing certain characters from a string

问题描述

我正在考虑使用 String.replaceAll（）删除字符串中的某些字符。目前还不清楚哪些字符会被删除（即我要删除哪些字符），但我认为任何字符都有效（如 [a-zA-Z] 等等 $％！等等。）

I am thinking about using String.replaceAll() to remove certain characters in my string. It is unclear which characters are going to be removed (i.e. which characters I want to remove), but I would assume that any character is valid (like [a-zA-Z] and things like $%!, etc).

我遇到了http://www.java-tips.org/java-se- tips / java.lang / strip-certain-characters-from-a-string.html 但肯定有一种比迭代每个字符更好的方法......

I came across http://www.java-tips.org/java-se-tips/java.lang/strip-certain-characters-from-a-string.html but surely there is a better way than iterating over each character...

对此有何想法？

谢谢

示例：

为了澄清，我将有不同长度的字符串。我想从中删除字符，确切的在运行时确定，然后返回结果字符串。

Just to clarify, I will have strings of varying lengths. I want to strip characters from it, the exact ones to be determined at runtime, and return the resulting string.

采用上面的段落并允许我删除 ，。，我会返回字符串：

Taking the paragraph above and allowing me to strip out the ",.", I would return the string:

只是为了澄清我的意愿有
不同长度的字符串我想从中删除
字符确切的那些字符到
在运行时确定并返回
结果字符串

Just to clarify I will have strings of varying lengths I want to strip characters from it the exact ones to be determined at runtime and return the resulting string

顺便说一句，我知道replaceAll（）使用正则表达式，所以如果我想删除字符$，。，我也需要逃避它们，对吗？

As an aside, I know that replaceAll() uses regular expressions, so if I wanted to strip out the characters "$,.", I would need to escape them too, right?

推荐答案

我想，以下代码可以帮到你。

I guess, the below code will help you.

    String input = "Just to clarify, I will have strings of varying "
      + "lengths. I want to strip characters from it, the exact "
      + "ones to be determined at runtime, and return the "
      + "resulting string.";
    String regx = ",.";
    char[] ca = regx.toCharArray();
    for (char c : ca) {
        input = input.replace(""+c, "");
    }
    System.out.println(input);

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