从文本中删除除<br>以外的所有HTML标记？

Question

嗨全部 我有一个java字符串，我想要 1-删除所有的html标签，除了新的行标签<br>和</br>从它，并保留文本内的标签，如果有一个文本。 2-解析后的文本结果彼此连接如：text1andtext2，文本之间没有空格分隔，我也想这样做。

这里是我在做什么：

String html = "<div dir=\"ltr\">hello my friend<span>ECHO</span><br>how are you ?<br><br><div class=\"gmail_quote\">On Mon, Feb 14, 2011 at 10:45 AM, My Friend <span dir=\"ltr\">&lt;<a href=\"mailto:notifications@mydomain.com\">notifications@mydomain.com</a>&gt;</span> wrote:<br> " 
      + "<blockquote class=\"gmail_quote\" style=\"margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;\"> "; 
    String parsedText = html.replaceAll("\\<.*?\\>", ""); 
    System.out.println(parsedText); 

电流输出：

hello my friendECHOhow are you ?On Mon, Feb 14, 2011 at 10:45 AM, My Friend <notifications@mydomain.com> wrote: 

所需的输出：

hello my friend ECHO <br> how are you ? <br> <br> On Mon, Feb 14, 2011 at 10:45 AM, My Friend &`lt;notifications@mydomain.com&gt; wrote:` 

Answer 1

你可以这样说：

final String html = 
    "<div dir=\"ltr\">hello my friend<span>ECHO</span><br>how are you ?" + 
    "<br><br><div class=\"gmail_quote\">On Mon, Feb 14, 2011 at 10:45 AM," + 
    " My Friend <span dir=\"ltr\">&lt;<a href=\"mailto:notifications@mydo" + 
    "main.com\">notifications@mydomain.com</a>&gt;</span> wrote:<br><bloc" + 
    "kquote class=\"gmail_quote\" style=\"margin: 0pt 0pt 0pt 0.8ex; bord" + 
    "er-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;\"> "; 
final Pattern tagPattern = Pattern.compile("<([^\\s>/]+).*?>"); 
final Matcher matcher = tagPattern.matcher(html); 
final StringBuffer sb = new StringBuffer(html.length()); 
while(matcher.find()){ 
    matcher 
     .appendReplacement(sb, matcher.group(1).equalsIgnoreCase("br") 
      ? matcher.group() 
      : " "); 
} 
matcher.appendTail(sb); 

final String parsedText = sb.toString(); 
System.out.println(parsedText); 

输出：

hello my friendECHO<br>how are you ?<br><br>On Mon, Feb 14, 2011 at 10:45 AM, 
My Friend &lt;notifications@mydomain.com&gt; wrote:<br> 

但是我希望你们知道，Cthulhu is calling if you do 。不要用正则表达式解析HTML/XML！

Answer 2

我会

• 用换行符或其他特殊字符替换全部< br />。
• 删除所有标签。
• 替换为特殊字符< BR />

Answer 3

看这个问题

How do I preserve line breaks when using jsoup to convert html to plain text?