Sigar获取系统信息

  直接看代码：

[java] view plaincopy

1. import java.io.IOException;    
2. import java.io.PrintWriter;    
3.     
4. import javax.servlet.ServletException;    
5. import javax.servlet.http.HttpServlet;    
6. import javax.servlet.http.HttpServletRequest;    
7. import javax.servlet.http.HttpServletResponse;    
8.     
9. import org.hyperic.sigar.Cpu;    
10. import org.hyperic.sigar.CpuPerc;    
11. import org.hyperic.sigar.Mem;    
12. import org.hyperic.sigar.Sigar;    
13. import org.hyperic.sigar.Swap;    
14.     
15. public class SigarServlet extends HttpServlet {    
16.     
17.     public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {    
18.             
19.         try {    
20.             Sigar sigar = new Sigar();    
21.             CpuPerc perc = sigar.getCpuPerc();    
22.             Mem mem = sigar.getMem();    
23.             Swap swap = sigar.getSwap();    
24.                 
25.             int cpuUsage = (int)perc.getCombined();    
26.             int memFree = (int)(mem.getFree()/(1024l*1024l));    
27.             int memTotal = (int)(mem.getTotal()/(1024l*1024l));    
28.                 
29.             int pageFileFree = (int)(swap.getPageOut()/(1024l*1024l));    
30.             int pageFileTotal = (int)(swap.getPageIn()/(1024l*1024l));    
31.             int swapFree = (int)(swap.getFree()/(1024l*1024l));    
32.             int swapTotal = (int)(swap.getTotal()/(1024l*1024l));    
33.                 
34.                 
35.             response.setContentType("text/html;charset=GB2312");    
36.             PrintWriter out = response.getWriter();    
37.     
38.             Cpu cpu = sigar.getCpu();    
39.                 
40.             out.println("CPU Usage："+perc.getCombined());    
41.             out.println("<br/>");    
42.             out.println("Memory Free："+memFree);    
43.             out.println("<br/>");    
44.             out.println("Memory Total："+memTotal);    
45.             out.println("<br/>");    
46.             out.println("Swap Free："+swapFree);    
47.             out.println("<br/>");    
48.             out.println("Swap Total："+swapTotal);    
49.             out.println("<br/>");    
50.             out.println("Page Free："+pageFileFree);    
51.             out.println("<br/>");    
52.             out.println("Page Total："+pageFileTotal);    
53.     
54.             out.close();    
55.     
56.         } catch (Exception e) {    
57.                 
58.         }    
59.     }    
60.     
61. }    

配置：

[html] view plaincopy

1. <?xml version="1.0" encoding="UTF-8"?>    
2. <web-app id="WebApp_ID" version="2.4" xmlns="http://java./xml/ns/j2ee" xmlns:xsi="http://www./2001/XMLSchema-instance" xsi:schemaLocation="http://java./xml/ns/j2ee http://java./xml/ns/j2ee/web-app_2_4.xsd">    
3.     <display-name>sigar</display-name>    
4.     <servlet>    
5.        <servlet-name>sigarServlet</servlet-name>    
6.        <servlet-class>sigar.SigarServlet</servlet-class>    
7.     </servlet>    
8.         
9.     <servlet-mapping>    
10.         <servlet-name>sigarServlet</servlet-name>    
11.         <url-pattern>/sigar</url-pattern>    
12.     </servlet-mapping>    
13.         
14.     <welcome-file-list>    
15.         <welcome-file>index.html</welcome-file>    
16.         <welcome-file>index.htm</welcome-file>    
17.         <welcome-file>index.jsp</welcome-file>    
18.         <welcome-file>default.html</welcome-file>    
19.         <welcome-file>default.htm</welcome-file>    
20.         <welcome-file>default.jsp</welcome-file>    
21.     </welcome-file-list>    
22. </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