Sigar获取系统信息

直接看代码：

    import java.io.IOException;  
    import java.io.PrintWriter;  
      
    import javax.servlet.ServletException;  
    import javax.servlet.http.HttpServlet;  
    import javax.servlet.http.HttpServletRequest;  
    import javax.servlet.http.HttpServletResponse;  
      
    import org.hyperic.sigar.Cpu;  
    import org.hyperic.sigar.CpuPerc;  
    import org.hyperic.sigar.Mem;  
    import org.hyperic.sigar.Sigar;  
    import org.hyperic.sigar.Swap;  
      
    public class SigarServlet extends HttpServlet {  
      
        public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {  
              
            try {  
                Sigar sigar = new Sigar();  
                CpuPerc perc = sigar.getCpuPerc();  
                Mem mem = sigar.getMem();  
                Swap swap = sigar.getSwap();  
                  
                int cpuUsage = (int)perc.getCombined();  
                int memFree = (int)(mem.getFree()/(1024l*1024l));  
                int memTotal = (int)(mem.getTotal()/(1024l*1024l));  
                  
                int pageFileFree = (int)(swap.getPageOut()/(1024l*1024l));  
                int pageFileTotal = (int)(swap.getPageIn()/(1024l*1024l));  
                int swapFree = (int)(swap.getFree()/(1024l*1024l));  
                int swapTotal = (int)(swap.getTotal()/(1024l*1024l));  
                  
                  
                response.setContentType("text/html;charset=GB2312");  
                PrintWriter out = response.getWriter();  
      
                Cpu cpu = sigar.getCpu();  
                  
                out.println("CPU Usage："+perc.getCombined());  
                out.println("<br/>");  
                out.println("Memory Free："+memFree);  
                out.println("<br/>");  
                out.println("Memory Total："+memTotal);  
                out.println("<br/>");  
                out.println("Swap Free："+swapFree);  
                out.println("<br/>");  
                out.println("Swap Total："+swapTotal);  
                out.println("<br/>");  
                out.println("Page Free："+pageFileFree);  
                out.println("<br/>");  
                out.println("Page Total："+pageFileTotal);  
      
                out.close();  
      
            } catch (Exception e) {  
                  
            }  
        }  
      
    }  

配置：

    <?xml version="1.0" encoding="UTF-8"?>  
    <web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">  
        <display-name>sigar</display-name>  
        <servlet>  
           <servlet-name>sigarServlet</servlet-name>  
           <servlet-class>sigar.SigarServlet</servlet-class>  
        </servlet>  
          
        <servlet-mapping>  
            <servlet-name>sigarServlet</servlet-name>  
            <url-pattern>/sigar</url-pattern>  
        </servlet-mapping>  
          
        <welcome-file-list>  
            <welcome-file>index.html</welcome-file>  
            <welcome-file>index.htm</welcome-file>  
            <welcome-file>index.jsp</welcome-file>  
            <welcome-file>default.html</welcome-file>  
            <welcome-file>default.htm</welcome-file>  
            <welcome-file>default.jsp</welcome-file>  
        </welcome-file-list>  
    </web-app>  

需要的jar：
.sigar_shellrc
pdh.dll
sigar-1.5.0.1.jar
sigar-x86-winnt.dll
sigar-x86-winnt.lib

测试结果：

访问http://127.0.0.1:8080/sigar/sigar

CPU Usage：0.22815533980582525
Memory Free：863
Memory Total：2046
Swap Free：2048
Swap Total：4330
Page Free：0
Page Total：0

测试系统：windows Vista

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