如何设置一个等于“htp：// website htp：// website”的java字符串变量 [英] How to set a java string variable equal to "htp://website htp://website "

问题描述

所以我有一个很大的网站列表，我想把它们全部放在一个String变量中。我知道我无法单独访问所有链接并逃脱//，但是有超过几百个链接。有没有办法进行块逃逸，所以块之间的所有内容都被转义了？这是我想要在变量中保存的示例。

so I have a large list of websites and I want to put them all in a String variable. I know I can not individually go to all of the links and escape the //, but is there is over a few hundred links. Is there a way to do a "block escape", so everything in between the "block" is escaped? This is an example of what I want to save in the variable.

String links="http://website http://website http://website http://website http://website http://website"

也可以有人想到我可能遇到的任何其他问题这样做？

Also can anyone think of any other problems I might run into while doing this?

我做了htp而不是http，因为我不允许根据堆栈溢出发布超链接，因为我不在那个级别：p

I made it htp instead of http because I am not allowed to post "hyperlinks" according to stack overflow as I am not at that level :p

非常感谢

编辑：我正在编写一个程序因为我有大约50页的单词文档电子邮件和其他文字。我想过滤掉电子邮件。我编写程序来做这个非常简单，不是我只需要计算将页面存储在一个字符串变量中，程序将在其中运行。

I am making a program because I have about 50 pages of a word document that is filled with both emails and other text. I want to filter out just the emails. I wrote the program to do this which was very simple, not I just need to figure away to store the pages in a string variable in which the program will be run on.

推荐答案

你的问题写得不好。请改进它。在目前的格式中，它将被关闭为太模糊。

Your question is not well-written. Improve it, please. In its current format it will be closed as "too vague".

您想要过滤电子邮件或网站吗？您的示例是关于网站，您发送有关电子邮件的文本。虽然我不知道，但我决定尝试帮助你，我决定两者兼顾。

Do you want to filter e-mails or websites? Your example is about websites, you text about e-mails. As I don't know and I decided to try to help you anyway, I decided to do both.

以下是代码：

private static final Pattern EMAIL_REGEX =
        Pattern.compile("[A-Za-z0-9](:?(:?[_\\.\\-]?[a-zA-Z0-9]+)*)@(:?[A-Za-z0-9]+)(:?(:?[\\.\\-]?[a-zA-Z0-9]+)*)\\.(:?[A-Za-z]{2,})");

private static final Pattern WEBSITE_REGEX =
        Pattern.compile("http(:?s?)://[_#\\.\\-/\\?&=a-zA-Z0-9]*");

public static String readFileAsString(String fileName) throws IOException {
    File f = new File(fileName);
    byte[] b = new byte[(int) f.length()];
    InputStream is = null;
    try {
        is = new FileInputStream(f);
        is.read(b);
        return new String(b, "UTF-8");
    } finally {
        if (is != null) is.close();
    }
}

public static List<String> filterEmails(String everything) {
    List<String> list = new ArrayList<String>(8192);
    Matcher m = EMAIL_REGEX.matcher(everything);
    while (m.find()) {
        list.add(m.group());
    }
    return list;
}

public static List<String> filterWebsites(String everything) {
    List<String> list = new ArrayList<String>(8192);
    Matcher m = WEBSITE_REGEX.matcher(everything);
    while (m.find()) {
        list.add(m.group());
    }
    return list;
}

为了确保它有效，首先让我们测试filterEmails和filterWebsites方法：

To ensure that it works, first lets test the filterEmails and filterWebsites method:

public static void main(String[] args) {
    System.out.println(filterEmails("Orange, pizza whatever else [e-mail] a lot of text here. Blahblah blah with Luke Skywalker ([e-mail]) hfkjdsh fhdsjf jdhf Paulo <[e-mail]>"));
    System.out.println(filterWebsites("Orange, pizza whatever else [e-mail] a lot of text here. Blahblah blah with Luke Skywalker (http://luke.starwars.com/force) hfkjdsh fhdsjf jdhf Paulo <https://darth.vader/blackside?sith=true&midclorians> And the http://www.somewhere.com as x."));
}

输出：

[[e-mail], [e-mail], [e-mail]]
[http://luke.starwars.com/force, https://darth.vader/blackside?sith=true&midclorians, http://www.somewhere.com]

测试readFileAsString方法：

To test the readFileAsString method:

public static void main(String[] args) {
    System.out.println(readFileAsString("C:\\The_Path_To_Your_File\\SomeFile.txt"));
}

如果该文件存在，将打印其内容。

If that file exists, its content will be printed.

如果您不喜欢它返回 List< String> 而不是 String 项目除以空格，这很容易解决：

If you don't like the fact that it returns List<String> instead of a String with items divided by spaces, this is simple to solve:

public static String collapse(List<String> list) {
    StringBuilder sb = new StringBuilder(50 * list.size());
    for (String s : list) {
        sb.append(" ").append(s);
    }
    sb.delete(0, 1);
    return sb.toString();
}

坚持所有：

String fileName = ...;
String webSites = collapse(filterWebsites(readFileAsString(fileName)));
String emails = collapse(filterEmails(readFileAsString(fileName)));

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