分享一个很有意思的环境探针

 
<%@ page contentType="text/html;charset=gb2312" %>
<%@ page import="java.util.*,java.io.*,javax.servlet.*,javax.servlet.http.*,java.lang.*" %>
<%
    long timePageStart = System.currentTimeMillis();
%>
<%
class EnvServlet
{
    public long timeUse=0;
    public Hashtable htParam=new Hashtable();
    private Hashtable htShowMsg=new Hashtable();
    public void setHashtable()
    {
        Properties me=System.getProperties();
        Enumeration em=me.propertyNames();
        while(em.hasMoreElements())
        {
            String strKey=(String)em.nextElement();
            String strValue=me.getProperty(strKey);
            htParam.put(strKey,strValue);
        }
    }    
    public void getHashtable(String strQuery)
    {
        Enumeration em=htParam.keys();
        while(em.hasMoreElements())
        {
            String strKey=(String)em.nextElement();
            String strValue=new String();
            if(strKey.indexOf(strQuery,0)>=0)
            {
                strValue=(String)htParam.get(strKey);
                htShowMsg.put(strKey,strValue);
            }
        }
    }
    public String queryHashtable(String strKey)
    {
        strKey=(String)htParam.get(strKey);
        return strKey;
    }
    public long test_int()
    {
        long timeStart = System.currentTimeMillis();
        int i=0;
        while(i<3000000)i++;
        long timeEnd = System.currentTimeMillis();
        long timeUse=timeEnd-timeStart;
        return timeUse;
    }
    public long test_sqrt()
    {
        long timeStart = System.currentTimeMillis();
        int i=0;
        double db=(double)new Random().nextInt(1000);
        while(i<200000){db=Math.sqrt(db);i++;}
        long timeEnd = System.currentTimeMillis();
        long timeUse=timeEnd-timeStart;
        return timeUse;
    }
}
%>
<%
    EnvServlet env=new EnvServlet();
    env.setHashtable();
    String action=new String(" ");
    String act=new String("action");
    if(request.getQueryString()!=null&&request.getQueryString().indexOf(act,0)>=0)action=request.getParameter(act);
%>
<html>
<head>
<title>JSP 探针</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<style>
A       { COLOR: #000000; TEXT-DECORATION: none}
A:hover { COLOR: #f58200}
body,td,span { font-size: 9pt}
.input  { BACKGROUND-COLOR: #ffffff;BORDER:#f58200 1px solid;FONT-SIZE: 9pt}
.backc  { BACKGROUND-COLOR: #f58200;BORDER:#f58200 1px solid;FONT-SIZE: 9pt;color:white}
.PicBar { background-color: #f58200; border: 1px solid #000000; height: 12px;}
.tableBorder {BORDER-RIGHT: #183789 1px solid; BORDER-TOP: #183789 1px solid; BORDER-LEFT: #183789 1px solid; BORDER-BOTTOM: #183789 1px solid; BACKGROUND-COLOR: #ffffff; WIDTH: 760;}
.divcenter {
    position:absolute;
    height:30px;
    z-index:1000;
    left: 101px;
    top: 993px;
}
</STYLE>
<script language="javascript">
function showsubmenu(sid)
{
whichEl = eval("submenu" + sid);
if (whichEl.style.display == "none")
{
eval("submenu" + sid + ".style.display="";");
eval("txt" + sid + ".innerHTML="<a href='#' title='关闭此项'><font face='Wingdings' color=#FFFFFF>x</font></a>";");
}
else
{
eval("submenu" + sid + ".style.display="none";");
eval("txt" + sid + ".innerHTML="<a href='#' title='打开此项'><font face='Wingdings' color=#FFFFFF>y</font></a>";");
}
}
</SCRIPT>
</head>
<body topmargin="0" leftmargin="0">
<CENTER>
  选项：<a href="#ServerInfo">服务器相关参数</a> | <a href="#JAVAInfo">JAVA相关参数</a> | <a href="#Paramter">参数查询</a>  | <a href="#ServerAbility">服务器运算能力</a> 
| <a href="#ISpeedTest">服务器连接速度</a> 
  | <a href="javascript:location.reload()">刷新</a><a name="ServerInfo"></a>
  <table border="0" cellpadding="0" cellspacing="1" class="tableBorder">
  <tr> 
    <td height="22" align="center" bgcolor="#f58200" onclick="showsubmenu(0)"><font color=#FFFFFF><strong>服务器相关参数</strong></font> 
      
<a href="#top" title="返回顶部"><font face='Webdings' color=#FFFFFF>5</font></a> <span id=txt0 name=txt0><a href='#' title='关闭此项'><font face='Wingdings' color=#FFFFFF>x</font></a></span> 
</td>
  </tr>
  <tr> 
    <td style="display" id='submenu0'><table border=0 width=100% cellspacing=1 cellpadding=3 bgcolor="#f58200">
          <tr bgcolor="#FFFFFF" height="22"> 
            <td width="130"> 服务器名</td>
            <td colspan="3" height="22"> <%= request.getServerName() %>(<%=request.getRemoteAddr()%>)</td>
          </tr>
          <tr bgcolor="#FFFFFF" height="22"> 
            <td> 服务器操作系统</td>
            <td colspan="3"> <%=env.queryHashtable("os.name")%> <%=env.queryHashtable("os.version")%> 
              <%=env.queryHashtable("sun.os.patch.level")%></td>
          </tr>
          <tr bgcolor="#FFFFFF" height="22"> 
            <td> 服务器操作系统类型</td>
            <td> <%=env.queryHashtable("os.arch")%></td>
            <td> 服务器操作系统模式</td>
            <td> <%=env.queryHashtable("sun.arch.data.model")%>位</td>
          </tr>     
          <tr bgcolor="#FFFFFF" height="22"> 
            <td> 服务器所在地区</td>
            <td> <%=env.queryHashtable("user.country")%></td>
            <td> 服务器语言</td>
            <td> <%=env.queryHashtable("user.language")%></td>
          </tr>
          <tr bgcolor="#FFFFFF" height="22"> 
            <td> 服务器时区</td>
            <td> <%=env.queryHashtable("user.timezone")%></td>
            <td> 服务器时间</td>
            <td> <%=new java.util.Date()%> </td>
          </tr>
          <tr bgcolor="#FFFFFF" height="22"> 
            <td> 服务器解译引擎</td>
            <td width="170"> <%= getServletContext().getServerInfo() %></td>
            <td width="130"> 服务器端口</td>
            <td width="170"> <%= request.getServerPort() %></td>
          </tr>
          <tr bgcolor="#FFFFFF" height="22"> 
            <td height="22"> 当前用户</td>
            <td height="22" colspan="3"> <%=env.queryHashtable("user.name")%></td>
          </tr>
          <tr bgcolor="#FFFFFF" height="22"> 
            <td> 用户目录</td>
            <td colspan="3"> <%=env.queryHashtable("user.dir")%></td>
          </tr>
          <tr bgcolor="#FFFFFF" height="22"> 
            <td align=left bgcolor="#FFFFFF"> 本文件实际路径</td>
            <td height="8" colspan="3" bgcolor="#FFFFFF"> <%=request.getRealPath(request.getServletPath())%></td>
          </tr>
        </table>
    </td>
  </tr>
</table>
  <a name="JAVAInfo" id="JAVAInfo"></a><br>
<table border="0" cellpadding="0" cellspacing="1" class="tableBorder">
  <tr> 
      <td height="22" align="center" bgcolor="#f58200" onclick="showsubmenu(1)"><font color=#FFFFFF><strong>JAVA相关参数</strong></font> 
        <a href="#top" title="返回顶部"><font face='Webdings' color=#FFFFFF>5</font></a> 
        <span id=txt1 name=txt1><a href='#' title='关闭此项'><font face='Wingdings' color=#FFFFFF>x</font></a></span> 
      </td>
  </tr>
  <tr> 
    <td style="display" id='submenu1'>
        <table border=0 width=100% cellspacing=1 cellpadding=3 bgcolor="#f58200">
          <tr bgcolor="#fcc79b" height="22"> 
            <td width="30%"> 名称</td>
            <td width="50%" height="22"> 英文名称</td>
            <td width="20%" height="22"> 版本</td>
          </tr>
          <tr bgcolor="#FFFFFF" height="22"> 
            <td width="30%"> JAVA运行环境名称</td>
            <td width="50%" height="22"> <%=env.queryHashtable("java.runtime.name")%></td>
            <td width="20%" height="22"> <%=env.queryHashtable("java.runtime.version")%></td>
          </tr>
          <tr bgcolor="#FFFFFF" height="22"> 
            <td width="30%"> JAVA运行环境说明书名称</td>
            <td width="50%" height="22"> <%=env.queryHashtable("java.specification.name")%></td>
            <td width="20%" height="22"> <%=env.queryHashtable("java.specification.version")%></td>
          </tr>
          <tr bgcolor="#FFFFFF" height="22"> 
            <td width="30%"> JAVA虚拟机名称</td>
            <td width="50%" height="22"> <%=env.queryHashtable("java.vm.name")%></td>
            <td width="20%" height="22"> <%=env.queryHashtable("java.vm.version")%></td>
          </tr>
          <tr bgcolor="#FFFFFF" height="22"> 
            <td width="30%"> JAVA虚拟机说明书名称</td>
            <td width="50%" height="22"> <%=env.queryHashtable("java.vm.specification.name")%></td>
            <td width="20%" height="22"> <%=env.queryHashtable("java.vm.specification.version")%></td>
          </tr>
          <%
              float fFreeMemory=(float)Runtime.getRuntime().freeMemory();
            float fTotalMemory=(float)Runtime.getRuntime().totalMemory();
            float fPercent=fFreeMemory/fTotalMemory*100;
          %>
          <tr bgcolor="#FFFFFF" height="22"> 
              <td height="22"> JAVA虚拟机剩余内存：</td>
            <td height="22" colspan="2"><img align=absmiddle class=PicBar width='<%=0.85*fPercent%>%'> <%=fFreeMemory/1024/1024%>M 
            </td>
          </tr>
          <tr bgcolor="#FFFFFF" height="22"> 
              <td height="22"> JAVA虚拟机分配内存</td>
            <td height="22" colspan="2"><img align=absmiddle class=PicBar width='85%'> <%=fTotalMemory/1024/1024%>M 
            </td>
          </tr>
        </table>
        <table border=0 width=100% cellspacing=1 cellpadding=3 bgcolor="#f58200">
          <tr bgcolor="#fcc79b" height="22"> 
            <td width="30%"> 参数名称</td>
            <td width="70%" height="22"> 参数路径</td>
          </tr>
          <tr bgcolor="#FFFFFF" height="22"> 
            <td width="30%"> java.class.path </td>
            <td width="70%" height="22"> <%=env.queryHashtable("java.class.path").replaceAll(env.queryHashtable("path.separator"),env.queryHashtable("path.separator")+"<br> ")%>        
            </td>
          </tr>
          <tr bgcolor="#FFFFFF" height="22"> 
            <td width="30%"> java.home</td>
            <td width="70%" height="22"> <%=env.queryHashtable("java.home")%></td>
          </tr>
          <tr bgcolor="#FFFFFF" height="22"> 
            <td width="30%"> java.endorsed.dirs</td>
            <td width="70%" height="22"> <%=env.queryHashtable("java.endorsed.dirs")%></td>
          </tr>
          <tr bgcolor="#FFFFFF" height="22"> 
            <td width="30%"> java.library.path</td>
            <td width="70%" height="22"> <%=env.queryHashtable("java.library.path").replaceAll(env.queryHashtable("path.separator"),env.queryHashtable("path.separator")+"<br> ")%>
            </td>
          </tr>
          <tr bgcolor="#FFFFFF" height="22"> 
            <td width="30%"> java.io.tmpdir</td>
            <td width="70%" height="22"> <%=env.queryHashtable("java.io.tmpdir")%></td>
          </tr>
        </table>
    </td>
  </tr>
</table>
  <a name="Paramter" id="Paramter"></a><br>
  <form action="?action=query" method="post" name="queryform">
  <table border="0" cellpadding="0" cellspacing="1" class="tableBorder">
    <tr> 
      <td height="22" align="center" bgcolor="#f58200" onclick="showsubmenu(2)"><font color=#FFFFFF><strong>参数查询</strong></font> 
        <a href="#top" title="返回顶部"><font face='Webdings' color=#FFFFFF>5</font></a> 
        <span id=txt2 name=txt2><a href='#' title='关闭此项'><font face='Wingdings' color=#FFFFFF>x</font></a></span> 
      </td>
    </tr>
    <tr> 
      <td style="display" id='submenu2'> 
          <table border=0 width=100% cellspacing=1 cellpadding=3 bgcolor="#f58200">
          <tr bgcolor="#fcc79b" height="22"> 
            <td> 请查询系统的参数信息(<a href="#" onClick="document.queryform.submit()">枚举所有参数信息</a>)</td>
          </tr>
          <tr bgcolor="#FFFFFF" height="22"> 
            <td align=center>
            <input type="text" name="query" class="input" size="70">  
            <input type="submit" value="提交" class="backc"> 
            <input type="reset" value="重置" class="backc">            </td>
          </tr>
        </table>
        <table border=0 width=100% cellspacing=1 cellpadding=3 bgcolor="#f58200">        
 <%
     if(action.equals("query"))
    {
        String query=request.getParameter("query");
        env.getHashtable(query);
        if(env.htShowMsg.size()>0)
            out.println("<tr bgcolor="#fcc79b" height="22">
<td> 参数名称</td>
<td> 参数信息</td>
</tr>");
        else
            out.println("<tr bgcolor="#fcc79b" height="22">
<td> <font color=red>出错信息：</font></td>
<td> <font color=red>没有找到你所查询的内容，请输入所要查询的参数，如果不确认，可以进行抽象查询，输入所包含字母。</font></td>
</tr>");
        Enumeration em=env.htShowMsg.keys();
        while(em.hasMoreElements())
           {
               String strParam=(String)em.nextElement();
            String strParamValue=(String)env.htShowMsg.get(strParam);
            if(strParam.indexOf(".path",0)>=0){strParamValue=strParamValue.replaceAll(env.queryHashtable("path.separator"),env.queryHashtable("path.separator")+"<br> ");}
               out.println ("<tr bgcolor="#FFFFFF" height="22"><td width="30%"> "+strParam+"</td><td width="70%"> "+strParamValue+"</td></tr>");
           }
    }
 %>
      </table>          
    </td>
    </tr>
  </table>
  </form>
  <a name="ServerAbility" id="ServerAbility"></a> 
  <table border="0" cellpadding="0" cellspacing="1" class="tableBorder">
    <tr> 
      <td height="22" align="center" bgcolor="#f58200" onclick="showsubmenu(3)"><font color=#FFFFFF><strong>服务器运算能力</strong></font> 
        <a href="#top" title="返回顶部"><font face='Webdings' color=#FFFFFF>5</font></a> 
        <span id=txt3 name=txt3><a href='#' title='关闭此项'><font face='Wingdings' color=#FFFFFF>x</font></a></span> 
      </td>
    </tr>
    <tr> 
      <td style="display" id='submenu3'> <table border=0 width=100% cellspacing=1 cellpadding=3 bgcolor="#f58200">
          <tr bgcolor="#fcc79b" height="22"> 
            <td colspan="3">  <font face='Webdings'>4</font> 让服务器执行300万次加法(<font color="#000000">整数运算</font>)和20万次开方(浮点运算)，记录其所使用的时间。 
            </td>
          </tr>
          <tr height="22"bgcolor="#FFFFFF" > 
            <td align=center bgcolor="#FFFFFF"><font color="#000000">可 供 参 考 的 
              服 务 器 列 表</font></td>
            <td align="center">整数运算</td>
            <td align="center">浮点运算</td>
          </tr>
          <tr bgcolor="#FFFFFF" height="22"> 
            <td align=left> 公司的电脑 (CPU:Celeron 1G  内存:256M)</td>
            <td align="center">60 毫秒</td>
            <td align="center">70 毫秒</td>
          </tr>
          <tr bgcolor="#FFFFFF" height="22"> 
            <td align=left> 家里的电脑 (CPU:Duron 1G  内存:384M) </td>
            <td align="center">20 毫秒</td>
            <td align="center">10 毫秒</td>
          </tr>
          <tr bgcolor="#FFFFFF" height="22"> 
            <td align=left> <a href="http://free3.e-168.cn/cnforum/jspenv.jsp" target="_blank">中国网聚服务器  
              (CPU:Intel Pentium III 1G 内存:768M)</a></td>
            <td align="center">20 毫秒</td>
            <td align="center">3 毫秒</td>
          </tr>
          <tr bgcolor="#FFFFFF" height="22"> 
            <td align=left> <a href="http://ibmclub.hust.edu.cn/myweb/ggyy/jspenv.jsp" target="_blank">IBM俱乐部  
              (CPU:IIntel(R) Celeron(R) CPU 1.70G 内存:256M)</a></td>
            <td align="center">3 毫秒 </td>
            <td align="center">7 毫秒</td>
          </tr>
          <tr bgcolor="#FFFFFF" height=25> 
            <td align=left> <font color=red>您正在使用的这台服务器</font>  <INPUT name="button2" type="button" class=backc onclick="javascript:location.reload()" value="重新测试"> 
            </td>
            <td align="center"><font color=red><%=env.test_int()%> 毫秒</font></td>
            <td align="center"><font color=red><%=env.test_sqrt()%> 毫秒</font></td>
          </tr>
        </table></td>
    </tr>
  </table>
  <a name="ISpeedTest" id="ISpeedTest"></a><br>
 <%
     if(action.equals("SpeedTest"))
    {
 %>
<div id="testspeed" align="center"> 
  <table width="200" border="0" cellspacing="0" cellpadding="0" class="divcenter">
    <tr> 
      <td height="30" align=center><p><font color="#000000"><span id=txt5>网速测试中，请稍候...</span></font></p></td>
    </tr>
  </table>
</div>
<%}%>

  <table border="0" cellpadding="0" cellspacing="1" bgcolor="#f58200" class="tableBorder">
  <tr> 
    <td height="25" align="center" bgcolor="#f58200" onclick="showsubmenu(4)"><font color="#FFFFFF"><strong>服务器连接速度</strong></font> 
      
<a href="#top" title="返回顶部"><font face='Webdings' color=#FFFFFF>5</font></a> <span id=txt4 name=txt4><a href='#' title='关闭此项'><font face='Wingdings' color=#FFFFFF>x</font></a></span> 

    </td>
  </tr>
  <tr> 
    <td bgcolor="#F8F9FC" style="display" id='submenu4'> <table width="100%" border="0" cellspacing=1 cellpadding=3 bgcolor="#f58200">
        <tr bgcolor="#FFFFFF"> 
          <td width="80">接入设备</td>
          <td width="420"> 连接速度(理想值)</td>
          <td width="100">下载速度(理想值)</td>
        </tr>
<tr bgcolor="#FFFFFF"> 
          <td>56k Modem</td>
          <td><img align=absmiddle class=PicBar width='1%'> 56 Kbps</td><td> 7.0 k/s</td>
        </tr>
        <tr bgcolor="#FFFFFF"> 
          <td>64k ISDN</td>
          <td><img align=absmiddle class=PicBar width='1%'> 64 Kbps</td><td> 8.0 k/s</td>
        </tr>
        <tr bgcolor="#FFFFFF"> 
          <td>512k ADSL</td>
          <td><img align=absmiddle class=PicBar width='5%'> 512 Kbps</td><td> 64.0 k/s</td>
        </tr>
        <tr bgcolor="#FFFFFF"> 
          <td height="19">1.5M Cable</td>
          <td><img align=absmiddle class=PicBar width='15%'> 1500 Kbps</td><td> 187.5 k/s</td>
        </tr>
        <tr bgcolor="#FFFFFF"> 
          <td>5M FTTP</td>
          <td><img align=absmiddle class=PicBar width='50%'> 5000 Kbps</td><td> 625.0 k/s</td>
        </tr>
        <tr bgcolor="#FFFFFF"> 
          <td>当前连接速度</td>
<%
if(action.equals("SpeedTest"))
{
        out.println("<script language='JavaScript'>var tSpeedStart=new Date();</script>")    ;
        out.println("<!--
");
        for(int i=0;i<1000;i++)
        {out.println("####################################################################################################");}
        out.println("-->
");
        out.println("<script language='JavaScript'>var tSpeedEnd=new Date();</script>
");
        out.println("<script language='JavaScript'>");
        out.println("var iSpeedTime=0;iSpeedTime=(tSpeedEnd - tSpeedStart) / 1000;");
        out.println("if(iSpeedTime>0) iKbps=Math.round(Math.round(100 * 8 / iSpeedTime * 10.5) / 10); else iKbps=10000 ;");
        out.println("var iShowPer=Math.round(iKbps / 100);");
        out.println("if(iShowPer<1) iShowPer=1;  else if(iShowPer>82)   iShowPer=82;");
        out.println("</script>
");
        out.println("<script language='JavaScript'>") ;
        out.println("document.write('<td><img align=absmiddle class=PicBar width="' + iShowPer + '%">' + iKbps + ' Kbps');");
        out.println("</script>
");
        out.println("</td><td> <a href='?action=SpeedTest' title=测试连接速度><u>");
        out.println("<script language='JavaScript'>");
        out.println("document.write(Math.round(iKbps/8*10)/10+ ' k/s');");
        out.println("</script>
") ;
        out.println("</u></a></td>");
%>
<script>
txt5.innerHTML="网速测试完毕!"
testspeed.style.visibility="hidden"
</script>
<%
}
else
{out.println("<td></td><td> <a href='?action=SpeedTest' title=测试连接速度><u>开始测试</u></a></td>");}
%>
        </tr>
      </table></td>
  </tr>
</table>
<%
    long timePageEnd = System.currentTimeMillis();
    long timePageUse=timePageEnd-timePageStart;
%>
</CENTER>
</body>
</html>

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原文地址：https://www.cnblogs.com/tk55/p/7134612.html