从文本中删除除 <br> 之外的所有 HTML 标签？

Question

大家好，我有一个java字符串，我想删除除新行标签之外的所有html标签<br>，</br>并将文本保留在标签内（如果有文本）。2-解析文本结果后相互连接，如： text1andtext2 ，文本之间没有空格分隔，我也想这样做。

这就是我正在做的：

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:

期望的输出：

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

你可以这样做：

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>  

但我希望你知道克苏鲁在召唤你。不要使用正则表达式解析 HTML / XML！