从java中的字符串中除去几个特定的​​HTML标记 [英] Removing Html tags except few specific ones from String in java

问题描述

我的输入是纯文本字符串，并且要求删除除以下特定标记之外的所有html标记：

My input is plain text string and requirement is to remove all html tags except few specific tags like:

<p>
<li>
<u>
<li>

如果这些特定标签的属性像 class 或 id ，我想删除这些属性。

If these specific tags have attributes like class or id, I want to remove these attributes.

几个例子：

A few examples:

<a href = "#">Link</a>            ->   Link

<p>paragraph</p>                  ->   <p>paragraph</p>

<p class="class1">paragraph</p>   ->   <p>paragraph</p>

我已经通过这个从字符串中删除HTML标记，但它不能完全回答我的问题。

I have gone through this Remove HTML tags from a String but it does not answer my question completely.

可以吗是由一组正则表达式的处理或我可以使用一些库吗？

Can it be handled by a set of regex's or could I make use of some library?

推荐答案

我试过JSoup和它似乎能够处理所有这些案件。以下是示例代码。

I tried JSoup and It seems to be able to handle all such cases. Here is example code.

 public String clean(String unsafe){
        Whitelist whitelist = Whitelist.none();
        whitelist.addTags(new String[]{"p","br","ul"});

        String safe = Jsoup.clean(unsafe, whitelist);
        return StringEscapeUtils.unescapeXml(safe);
 }

对于输入字符串

String unsafe = "<p class='p1'>paragraph</p>< this is not html > <a link='#'>Link</a> <![CDATA[<sender>John Smith</sender>]]>";

我得到以下几乎所需的输出。

I get following output which is pretty much I require.

<p>paragraph</p>< this is not html > Link <sender>John Smith</sender>

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