cache_jvm.jsp
资源名称:JSP-OA.rar [点击查看]
上传用户:jhtang88
上传日期:2014-01-27
资源大小:28528k
文件大小:5k
源码类别:
Jsp/Servlet
开发平台:
Java
- <%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*" errorPage="" %>
- <%@ page import="java.util.*,
- java.text.*"
- %>
- <jsp:useBean id="StrUtil" scope="page" class="cn.js.fan.util.StrUtil"/>
- <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
- <html>
- <head>
- <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
- <link href="../common.css" rel="stylesheet" type="text/css">
- <link href="default.css" rel="stylesheet" type="text/css">
- <title>查看java虚拟机内存</title>
- </head>
- <body>
- <table cellSpacing="0" cellPadding="0" width="100%">
- <tbody>
- <tr>
- <td align="left" class="head">系统信息</td>
- </tr>
- </tbody>
- </table>
- <jsp:useBean id="privilege" scope="page" class="cn.js.fan.module.pvg.Privilege"/>
- <%
- if (!privilege.isUserPrivValid(request, "forum.plugin"))
- {
- out.print(cn.js.fan.web.SkinUtil.makeErrMsg(request, cn.js.fan.web.SkinUtil.LoadString(request, "pvg_invalid")));
- return;
- }
- %>
- <br>
- <TABLE
- style="BORDER-RIGHT: #a6a398 1px solid; BORDER-TOP: #a6a398 1px solid; BORDER-LEFT: #a6a398 1px solid; BORDER-BOTTOM: #a6a398 1px solid"
- cellSpacing=0 cellPadding=3 width="95%" align=center>
- <!-- Table Head Start-->
- <TBODY>
- <TR>
- <TD width="70%" align="left" noWrap class=thead style="PADDING-LEFT: 10px"><font size="-1"><b>Java VM (Java虚拟机)内存</b></font> </TD>
- </TR>
- <TR class=row style="BACKGROUND-COLOR: #fafafa">
- <TD height="175" align="center" style="PADDING-LEFT: 10px"><p>
- <p>
- <%!
- static final DecimalFormat mbFormat = new DecimalFormat("#0.00");
- static final DecimalFormat percentFormat = new DecimalFormat("#0.0");
- static final int NUM_BLOCKS = 50;
- %>
- <%
- String op = request.getParameter("op");
- if (op==null)
- op = "";
- // The java runtime
- Runtime runtime = Runtime.getRuntime();
- if (op.equals("gc")) {
- runtime.gc();
- out.println("<p><font size=-1 color=red> 垃圾已收集</font></p>");
- }
- double freeMemory = (double)runtime.freeMemory()/(1024*1024);
- double totalMemory = (double)runtime.totalMemory()/(1024*1024);
- double maxMemory = Runtime.getRuntime().maxMemory()/(1024*1024);
- double usedMemory = totalMemory - freeMemory;
- double percentFree = ((double)freeMemory/(double)totalMemory)*100.0;
- int free = 100-(int)Math.round(percentFree);
- %>
- <ul><table width="277" border=0>
- <tr>
- <td width="135"><font size="-1">已用内存:</font></td>
- <td width="132"><font size="-1"><%= mbFormat.format(usedMemory) %> MB</font></td>
- </tr>
- <tr>
- <td><font size="-1">内存总量:</font></td>
- <td><font size="-1"><%= mbFormat.format(totalMemory) %> MB</font></td>
- </tr>
- <tr>
- <td><font size="-1">最大内存</font></td>
- <td><font size="-1"><%= mbFormat.format(maxMemory) %> MB</font></td>
- </tr>
- <tr>
- <td><font size="-1">处理器数</font></td>
- <td><font size="-1"><%=runtime.availableProcessors()%> 个</font></td>
- </tr>
- </table>
- <br>
- <table border=0>
- <td><table bgcolor="#000000" cellpadding="1" cellspacing="0" border="0" width="200" align=left>
- <td><table bgcolor="#000000" cellpadding="1" cellspacing="1" border="0" width="100%">
- <% for (int i=0; i<NUM_BLOCKS; i++) {
- if ((i*(100/NUM_BLOCKS)) < free) {
- %>
- <td bgcolor="#00ff00" width="<%= (100/NUM_BLOCKS) %>%"><img src="images/blank.gif" width="1" height="15" border="0"></td>
- <% } else { %>
- <td bgcolor="#006600" width="<%= (100/NUM_BLOCKS) %>%"><img src="images/blank.gif" width="1" height="15" border="0"></td>
- <% }
- }
- %>
- </table></td>
- </table></td>
- <td><font size="-1"> <b><%= percentFormat.format(percentFree) %>% 空闲</b> </font> </td>
- </table>
- <br>
- <table width="200" border="0" cellspacing="0" cellpadding="0">
- <tr>
- <td align="center">>> <font size="-1"><a href="cache_jvm.jsp?op=gc">垃圾收集</a></font> <font size="-1"><a href="cache_jvm.jsp">刷新</a></font> <<</td>
- </tr>
- <tr>
- <td height="48" align="center"><font size="-1">注意垃圾收集器是低线程级的,不能被强制执行</font></td>
- </tr>
- </table>
- </ul>
- <% // Destroy the runtime reference
- runtime = null;
- %>
- </TD>
- </TR>
- <!-- Table Body End -->
- <!-- Table Foot -->
- <TR>
- <TD class=tfoot align=right><DIV align=right> </DIV></TD>
- </TR>
- <!-- Table Foot -->
- </TBODY>
- </TABLE>
- <p>
- </body>
- </html>