he632099003 2016-03-11 12:58 采纳率: 0%
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已结题

http status 500报错，急求解答！

运行项目时候报错如下
HTTP Status 500 -

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: Unable to compile class for JSP:

An error occurred at line: 7 in the generated java file
The type sun.management.ManagementFactory is not visible

An error occurred at line: 48 in the jsp file: /admin/index/sysPro.jsp
ManagementFactory cannot be resolved
45:


46: 鎬诲唴瀛�/鍓╀綑鍐呭瓨锛�
47:
48: <% OperatingSystemMXBean osmb = (OperatingSystemMXBean) ManagementFactory.getOperatingSystemMXBean();%>
49: <%=osmb.getTotalPhysicalMemorySize() / 1024/1024 %>MB  /  <%=osmb.getFreePhysicalMemorySize() / 1024/1024 %>MB
50:
51:

Stacktrace:
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:92)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:330)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:423)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:308)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:286)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:273)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:566)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.struts2.dispatcher.ActionContextCleanUp.doFilter(ActionContextCleanUp.java:99)
org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:413)

note The full stack trace of the root cause is available in the Apache Tomcat/6.0.13 logs.

Apache Tomcat/6.0.13

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9条回答 默认 最新

  • he632099003 2016-03-11 13:10
    关注

    代码如下
    <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
    <%@ page import="sun.management.ManagementFactory" %>
    <%@ page import="com.sun.management.OperatingSystemMXBean" %>
    <%
    String path = request.getContextPath();
    %>

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">






        <link rel="stylesheet" type="text/css" href="<%=path %>/css/base.css" />
</head>

<body leftmargin="2" topmargin="9" background='<%=path %>/images/allbg.gif'>
    <table width="98%" align="center" border="0" cellpadding="4" cellspacing="1" bgcolor="#CBD8AC" style="margin-bottom:8px">
      <tr bgcolor="#EEF4EA">
        <td colspan="2" background="<%=path %>/images/wbg.gif" class='title'><span>系统基本信息</span></td>
      </tr>
      <tr bgcolor="#FFFFFF">
        <td width="25%" bgcolor="#FFFFFF" align="right">操作系统版本：</td>
        <td width="75%" bgcolor="#FFFFFF"><%=System.getProperty("os.name") %>&nbsp;&nbsp;<%=System.getProperty("os.version") %></td>
      </tr>
      <tr bgcolor="#FFFFFF">
        <td width="25%" bgcolor="#FFFFFF" align="right">操作系统类型：</td>
        <td><%=System.getProperty("os.arch") %><!-- x32,x86 --></td>
      </tr>
      <tr bgcolor="#FFFFFF">
        <td width="25%" bgcolor="#FFFFFF" align="right">用户,目录,临时目录：</td>
        <td><%=application.getRealPath("/")%></td>
      </tr>
      <tr bgcolor="#FFFFFF">
        <td width="25%" bgcolor="#FFFFFF" align="right">JDK版本：</td>
        <td><%=System.getProperty("java.version") %></td>
      </tr>
      <tr bgcolor="#FFFFFF">
        <td width="25%" bgcolor="#FFFFFF" align="right">JKD安装目录：</td>
        <td><%=System.getProperty("java.home") %></td>
      </tr>
      <tr bgcolor="#FFFFFF">
        <td width="25%" bgcolor="#FFFFFF" align="right">总内存/剩余内存：</td>
        <td>
            <% OperatingSystemMXBean osmb = (OperatingSystemMXBean) ManagementFactory.getOperatingSystemMXBean();%>
            <b><%=osmb.getTotalPhysicalMemorySize() / 1024/1024 %></b>MB&nbsp;&nbsp;/&nbsp;&nbsp;<b><%=osmb.getFreePhysicalMemorySize() / 1024/1024 %></b>MB
        </td>
      </tr>
    </table>
</body>

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