查看内存堆栈
这个页面放在tomcat/webapps/ROOT/下可以查看内存堆栈，对于分析定位性能问题，很有效果
<%@ page contentType="text/html;charset=UTF-8" language="java" pageEncoding="UTF-8"%><%@ page import="java.util.Set"%><%@ page import="java.util.Map"%><%@ page import="java.util.Iterator"%><%if("127.0.0.1".equals(request.getRemoteHost())){Map<Thread,StackTraceElement[]> threads = Thread.getAllStackTraces();Set keys = threads.keySet();Iterator iter = keys.iterator();while (iter.hasNext()){Thread t = (Thread)iter.next();%>=======================================================================ID: <%=t.getId()%>State: <%=t.getState()%><%= "\n"%><%StackTraceElement[] trace = threads.get(t);for(int i = 0 ;i < trace.length;i++){%><%= trace[i].toString()%><%= "\n"%><%}}}%>