/**
* 把html内容转为文本
*
* @param html 需要处理的html文本
* @param filterTags 需要保留的html标签样式
*/
public static String trimHtml2Txt(String html, String[] filterTags) {
html = html.replaceAll(" ", "");
html = html.replaceAll("\\<head>[\\s\\S]*?</head>(?i)", "");// 去掉head
html = html.replaceAll("\\<!--[\\s\\S]*?-->", "");// 去掉注释
html = html.replaceAll("\\<![\\s\\S]*?>", "");
html = html.replaceAll("\\<style[^>]*>[\\s\\S]*?</style>(?i)", "");// 去掉样式
html = html.replaceAll("\\<script[^>]*>[\\s\\S]*?</script>(?i)", "");// 去掉js
html = html.replaceAll("\\<w:[^>]+>[\\s\\S]*?</w:[^>]+>(?i)", "");// 去掉word标签
html = html.replaceAll("\\<xml>[\\s\\S]*?</xml>(?i)", "");
html = html.replaceAll("\\<html[^>]*>|<body[^>]*>|</html>|</body>(?i)", "");
html = html.replaceAll("\\\r\n|\n|\r", " ");// 去掉换行
html = html.replaceAll("\\<br[^>]*>(?i)", "\n\r");
List<String> tags = new ArrayList<String>();
List<String> s_tags = new ArrayList<String>();
List<String> halfTag = Arrays.asList(new String[] { "img", "table", "thead", "th", "tr", "td" });//
if (filterTags != null && filterTags.length > 0) {
for (String tag : filterTags) {
tags.add("<" + tag + (halfTag.contains(tag) ? "" : ">"));// 开始标签
if (!"img".equals(tag))
tags.add("</" + tag + ">");// 结束标签
s_tags.add("#REPLACETAG" + tag + (halfTag.contains(tag) ? "" : "REPLACETAG#"));// 尽量替换为复杂一点的标记,以免与显示文本混合,如：文本中包含#td、#table等
if (!"img".equals(tag))
s_tags.add("#REPLACETAG/" + tag + "REPLACETAG#");
}
}
html = StringUtils.replaceEach(html, tags.toArray(new String[tags.size()]),
s_tags.toArray(new String[s_tags.size()]));
html = html.replaceAll("\\</p>(?i)", "\n\r");
html = html.replaceAll("\\<[^>]+>", "");
html = StringUtils.replaceEach(html, s_tags.toArray(new String[s_tags.size()]),
tags.toArray(new String[tags.size()]));
html = html.replaceAll("\\ ", " ");
return html.trim();
}
非原创，仅用作学习使用。