正则只保留括号里的内容

场景：公司框架有一个前台导出功能，实际上是把HTML结构通过正则去掉一些没用的样式，然后由统一的工具导出。

但是不支持列表为下拉的样式，比如这种：

观察了工具：是这样的

<%@page contentType="text/html;charset=GB2312"%>
<%@ page import="java.util.regex.*" %>
<jsp:useBean id="xml" scope="session" class="com.nstc.exportkit.excel.ExportExcel"/><%String name=(String)request.getParameter("fileName");String fileName=name + ".xls";if(name!=null&&!"".equals(name)){fileName=java.net.URLEncoder.encode(name+".xls", "utf-8");}System.out.println("导出文件名称："+fileName);response.reset();response.setContentType( "application/vnd.ms-excel;charset=GB2312");response.setHeader("Content-disposition","attachment; filename=\"" + fileName + "\"");String table = request.getParameter("_ExcelText_");//bos.write(table);//bos.close();if(table.indexOf("</THEAD>")>0 ){String regex ="(<THEAD.*?>)";String regex1 ="(</THEAD>)|(<TBODY.*?>)";Pattern p1 = Pattern.compile(regex1,Pattern.CASE_INSENSITIVE);Matcher m1 = p1.matcher(table);String res1= m1.replaceAll("");Pattern p = Pattern.compile(regex,Pattern.CASE_INSENSITIVE);Matcher m = p.matcher(res1);String res= m.replaceAll("<TBODY>");String regex2 = "<BR>";Pattern p2 = Pattern.compile(regex2,Pattern.CASE_INSENSITIVE);Matcher m2 = p2.matcher(res);String res2 = m2.replaceAll("");String regex3 = "<INPUT.*?>";Pattern p3 = Pattern.compile(regex3,Pattern.CASE_INSENSITIVE);Matcher m3 = p3.matcher(res2);String res3 = m3.replaceAll("");String regex4 = "<SCRIPT LANGUAGE=.*?</SCRIPT>";Pattern p4 = Pattern.compile(regex4,Pattern.CASE_INSENSITIVE);Matcher m4 = p4.matcher(res3);String res4 = m4.replaceAll("");String regex5 = "<TABLE.*?>";Pattern p5 = Pattern.compile(regex5,Pattern.CASE_INSENSITIVE);Matcher m5 = p5.matcher(res4);String res5 = m5.replaceAll("<TABLE>");/*int i = res5.indexOf("<TR style=\"DISPLAY: none\"");String res14 = "";if(i>0){res14 = res5.substring(0, i);res14 += "</TBODY></TABLE>";}else{res14 = res5;}*/String regex14 = "<TR[^>]*?style=\"DISPLAY: none\"[\\s\\S]*?>[\\s\\S]*?</TR>";Pattern p14 = Pattern.compile(regex14,Pattern.CASE_INSENSITIVE);Matcher m14 = p14.matcher(res5);String res14 = m14.replaceAll("");String regex13 = "<TD[^>]*?style=\"DISPLAY: none\"[\\s\\S]*?>[\\s\\S]*?</TD>";Pattern p13 = Pattern.compile(regex13,Pattern.CASE_INSENSITIVE);Matcher m13 = p13.matcher(res14);String res13 = m13.replaceAll("");String regex7 = "<TR.*?>";Pattern p7 = Pattern.compile(regex7,Pattern.CASE_INSENSITIVE);Matcher m7 = p7.matcher(res13);String res7 = m7.replaceAll("<TR>");String regex8 = "<SPAN.*?>";Pattern p8 = Pattern.compile(regex8,Pattern.CASE_INSENSITIVE);Matcher m8 = p8.matcher(res7);String res8 = m8.replaceAll("");String regex9 = "</SPAN>";Pattern p9 = Pattern.compile(regex9,Pattern.CASE_INSENSITIVE);Matcher m9 = p9.matcher(res8);String res9 = m9.replaceAll("");String regex10 = "<LABEL.*?>";Pattern p10 = Pattern.compile(regex10,Pattern.CASE_INSENSITIVE);Matcher m10 = p10.matcher(res9);String res10 = m10.replaceAll("");String regex11 = "</LABEL>";Pattern p11 = Pattern.compile(regex11,Pattern.CASE_INSENSITIVE);Matcher m11 = p11.matcher(res10);String res11 = m11.replaceAll("");/*String regex12 = "(?i)<select.*?>.*?<option.*?selected=\"selected\".*?>(.*?)</option>.*?</select>";Pattern p12 = Pattern.compile(regex12,Pattern.CASE_INSENSITIVE);Matcher m12 = p12.matcher(res11);String res12 = m12.replaceAll("$1");*/System.out.println(res11);xml.export(res11,response.getOutputStream());} else {String regex2 = "<BR>";Pattern p2 = Pattern.compile(regex2,Pattern.CASE_INSENSITIVE);Matcher m2 = p2.matcher(table);String res2 = m2.replaceAll("");String regex3 ="(<FONT.*?>)";Pattern p3 = Pattern.compile(regex3,Pattern.CASE_INSENSITIVE);Matcher m3 = p3.matcher(res2);String res3= m3.replaceAll("");String regex4 ="(</FONT>)";Pattern p4 = Pattern.compile(regex4,Pattern.CASE_INSENSITIVE);Matcher m4 = p4.matcher(res3);String res4= m4.replaceAll("");String regex5 = "<INPUT.*?>";Pattern p5 = Pattern.compile(regex5,Pattern.CASE_INSENSITIVE);Matcher m5 = p5.matcher(res4);String res5 = m5.replaceAll("");String regex6 = "<SCRIPT LANGUAGE=(.|\n|\r)*?</SCRIPT>";Pattern p6 = Pattern.compile(regex6,Pattern.CASE_INSENSITIVE);Matcher m6 = p6.matcher(res5);String res6 = m6.replaceAll("");String regex7 = "<TD[^>]*?style=\"DISPLAY: none\"[\\s\\S]*?>[\\s\\S]*?</TD>";Pattern p7 = Pattern.compile(regex7,Pattern.CASE_INSENSITIVE);Matcher m7 = p7.matcher(res6);String res7 = m7.replaceAll("");String regex14 = "<TR[^>]*?style=\"DISPLAY: none\"[\\s\\S]*?>[\\s\\S]*?</TR>";Pattern p14 = Pattern.compile(regex14,Pattern.CASE_INSENSITIVE);Matcher m14 = p14.matcher(res7);String res14 = m14.replaceAll("");String regex9 = "<tr.*?>";Pattern p9 = Pattern.compile(regex9,Pattern.CASE_INSENSITIVE);Matcher m9 = p9.matcher(res14);String res9 = m9.replaceAll("<TR>");System.out.println(res9);String regex12 = "(?i)<select.*?>.*?<option.*?selected=\"selected\".*?>(.*?)</option>.*?</select>";Pattern p12 = Pattern.compile(regex12,Pattern.CASE_INSENSITIVE);Matcher m12 = p12.matcher(res9);String res12 = m12.replaceAll("$1");xml.export(res12,response.getOutputStream());}%>

只需要加上获取option里面数据的正则就可以了。注意使用非贪婪匹配和$1占位符

        String str = "<LABEL>是否需清理</LABEL></TH><TH colSpan=\"1\" rowSpan=\"1\" class=\"table_bg text-center\"  style=\"word-break: keep-all; width: 149px; height: 30px;\"><LABEL>反馈结果</LABEL></TH><TH colSpan=\"1\" rowSpan=\"1\" class=\"table_bg text-center\"  style=\"word-break: keep-all; width: 150px; height: 30px;\"><LABEL>不处理原因</LABEL></TH><TH colSpan=\"1\" rowSpan=\"1\" class=\"table_bg text-center\"  style=\"word-break: keep-all; width: 90px; height: 30px;\"><LABEL>反馈日期</LABEL></TH></TR></THEAD><TBODY><TR><TD colSpan=\"1\"rowSpan=\"1\" class=\"\" align=\"center\" valign=\"middle\"  style=\"vertical-align:middle;padding:0 5px 0 5px;\"></TD><TD colSpan=\"1\" rowSpan=\"1\" class=\"\" align=\"left\" valign=\"middle\"  style=\"vertical-align:middle;padding:0 5px 0 5px;\">01001003_01</TD><TD colSpan=\"1\" rowSpan=\"1\" class=\"\" align=\"left\" valign=\"middle\"  style=\"vertical-align:middle;padding:0 5px 0 5px;\">3333333310000</TD><TD colSpan=\"1\" rowSpan=\"1\" class=\"\" align=\"left\" valign=\"middle\"  style=\"vertical-align:middle;padding:0 5px 0 5px;\">四川电力公司</TD><TD colSpan=\"1\" rowSpan=\"1\" class=\"\" align=\"left\" valign=\"middle\"  style=\"vertical-align:middle;padding:0 5px 0 5px;\"></TD><TD colSpan=\"1\" rowSpan=\"1\" class=\"\" align=\"left\" valign=\"middle\"  style=\"vertical-align:middle;padding:0 5px 0 5px;\">旧单位21</TD><TD colSpan=\"1\" rowSpan=\"1\" class=\"\" align=\"left\" valign=\"middle\"  style=\"vertical-align:middle;padding:0 5px 0 5px;\">中国工商银行</TD><TD colSpan=\"1\" rowSpan=\"1\" class=\"\" align=\"left\" valign=\"middle\"  style=\"vertical-align:middle;padding:0 5px 0 5px;\">基本账户</TD><TD colSpan=\"1\" rowSpan=\"1\" class=\"\" align=\"left\" valign=\"middle\"  style=\"vertical-align:middle;padding:0 5px 0 5px;\">一般户</TD><TD colSpan=\"1\" rowSpan=\"1\" class=\"\"align=\"left\" valign=\"middle\"  style=\"vertical-align:middle;padding:0 5px 0 5px;\">非直联</TD><TD colSpan=\"1\" rowSpan=\"1\"class=\"\" align=\"left\" valign=\"middle\"  style=\"vertical-align:middle;padding:0 5px 0 5px;\">正常</TD><TD colSpan=\"1\" rowSpan=\"1\" class=\"\" align=\"left\" valign=\"middle\"  style=\"vertical-align:middle;padding:0 5px 0 5px;\">999.99</TD><TD colSpan=\"1\" rowSpan=\"1\" class=\"\" align=\"left\" valign=\"middle\"  style=\"vertical-align:middle;padding:0 5px 0 5px;\">2020-03-04</TD><TD colSpan=\"1\" rowSpan=\"1\" class=\"\" align=\"left\" valign=\"middle\"  style=\"vertical-align:middle;padding:0 5px 0 5px;\">";//list.set(i,line.replaceAll("\\sextends\\s+\\w+(?=(\\s+implements\\s+\\w+)?\\s?\\{)",""));String reg = "<select.*?>.*?<option.*?selected=\"selected\".*?>(.*?)</option>.*?</select>";System.out.println(str.replaceAll(reg,"$1"));

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