如何将POST请求参数解析成长尾关键词？

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javapackage com.yxcps.logs.logger;import java.io.IOException;import java.io.InputStream;import java.io.PrintWriter;import java.net.URLDecoder;import java.util.Date;import java.util.HashMap;import java.util.Map;

gistfile1.txt

package com.yxcps.logs.logger; import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.net.URLDecoder; import java.util.Date; import java.util.HashMap; import java.util.Map; import java.util.StringTokenizer; import javax.servlet.log.yxcps.cn/__log.action?_=09090909090 * */ public class AjaxLogger { private static final Logger loggerPerHour = Loggers.getLogger("per.hour"); private static final Logger loggerDailyLog = Loggers.getLogger("daily.log"); private static final Logger debugLog = Loggers.getLogger(LogsFilter.class.getName()); private Gson gson = new Gson(); public void recordAjaxLog(HttpServletRequest request, HttpServletResponse response) { recordAjaxLog(request); outHtml(response); } private void recordAjaxLog(HttpServletRequest request) { if (request.getMethod().toUpperCase().equals("POST")) { try { Map document = new HashMap (); InputStream input = request.getInputStream(); String str = IOUtils.toString(input); StringTokenizer st = new StringTokenizer(str, "&"); while (st.hasMoreElements()) { String[] s = st.nextToken().split("="); if (s.length == 1) { document.put(s[0], ""); } else if (s.length == 2) { String name = s[0]; String value = s[1]; value = URLDecoder.decode(value, "UTF-8"); document.put(name, value); } else { // System.out.println(Arrays.asList(s)); } } document.put("ip", RequestHelper.getIpAddr(request)); String write_time = DateFormatUtils.format(new Date(), "yyyyMMddHHmmss"); document.put("m1", "" + Long.parseLong(write_time)); String json = gson.toJson(document); loggerPerHour.info(json); document.put("M17", ""); document.put("M4", ""); json = gson.toJson(document); loggerDailyLog.info(json); } catch (Exception e) { debugLog.info(e.getMessage(), e); } } } private void outHtml(HttpServletResponse response){ try { response.setHeader("Pragma", "No-cache"); response.setHeader("Cache-Control", "no-cache"); response.setDateHeader("Expires", 0L); PrintWriter out = response.getWriter(); out.write("{}"); out.flush(); out.close(); } catch (IOException e) { } } }