/**
* 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
* @return
*/
public static String trimHtml2Txt(String html, String[] filterTags){
    html = html.replaceAll("\\[\\s\\S]*?(?i)", "");//去掉head
    html = html.replaceAll("\\", "");//去掉注释
    html = html.replaceAll("\\", "");
    html = html.replaceAll("\\]*>[\\s\\S]*?(?i)", "");//去掉样式
    html = html.replaceAll("\\]*>[\\s\\S]*?(?i)", "");//去掉js
    html = html.replaceAll("\\]+>[\\s\\S]*?]+>(?i)", "");//去掉word标签
    html = html.replaceAll("\\[\\s\\S]*?(?i)", "");
    html = html.replaceAll("\\]*>|]*>||(?i)", "");
    html = html.replaceAll("\\\r\n|\n|\r", " ");//去掉换行
    html = html.replaceAll("\\]*>(?i)", "\n\r");
    List tags = new ArrayList();
    List s_tags = new ArrayList();
    List 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("");//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("\\
(?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();
}