java监控linux服务器CPU,内存等信息

电玩女神 2022-06-12 06:55 317阅读 0赞

最近公司在做爬虫系统，我接到一个需求是获取服务器CPU,内存等信息。一开始我打算通过linux shell获取然后输出到文件，java读取文件获得。后来回想一切皆文件的linux应该本来就有记录在文件中，经过查找资料，找到了解决方法。  
资料参考：[http://www.jb51.net/article/75002.htm][http_www.jb51.net_article_75002.htm]

* 取得linux系统下的cpu、内存信息  
    *  
    * */  
    public  final  class LinuxSystemTool {   
    /** * get memory by used info * * @return int[] result * result.length==4;int[0]=MemTotal;int[1]=MemFree;int[2]=SwapTotal;int[3]=SwapFree; * @throws IOException * @throws InterruptedException */ 
    public  static  int [] getMemInfo() throws IOException, InterruptedException  
    {  
    File file = new File( "/proc/meminfo" );  
    BufferedReader br = new BufferedReader( new InputStreamReader(  
    new FileInputStream(file)));  
    int [] result = new  int [ 4 ];  
    String str = null ;  
    StringTokenizer token = null ;  
    while ((str = br.readLine()) != null )  
    {  
    token = new StringTokenizer(str);  
    if (!token.hasMoreTokens())  
    continue ;  
    
    str = token.nextToken();  
    if (!token.hasMoreTokens())  
    continue ;  
    
    if (str.equalsIgnoreCase( "MemTotal:" ))  
    result[0 ] = Integer.parseInt(token.nextToken());  
    else  if (str.equalsIgnoreCase( "MemFree:" ))  
    result[1 ] = Integer.parseInt(token.nextToken());  
    else  if (str.equalsIgnoreCase( "SwapTotal:" ))  
    result[2 ] = Integer.parseInt(token.nextToken());  
    else  if (str.equalsIgnoreCase( "SwapFree:" ))  
    result[3 ] = Integer.parseInt(token.nextToken());  
    }  
    
    return result;  
    }  
    
    /** * get memory by used info * * @return float efficiency * @throws IOException * @throws InterruptedException */ 
    public  static  float getCpuInfo() throws IOException, InterruptedException  
    {  
    File file = new File( "/proc/stat" );  
    BufferedReader br = new BufferedReader( new InputStreamReader(  
    new FileInputStream(file)));  
    StringTokenizer token = new StringTokenizer(br.readLine());  
    token.nextToken();  
    int user1 = Integer.parseInt(token.nextToken());  
    int nice1 = Integer.parseInt(token.nextToken());  
    int sys1 = Integer.parseInt(token.nextToken());  
    int idle1 = Integer.parseInt(token.nextToken());  
    
    Thread.sleep(1000 );  
    
    br = new BufferedReader(  
    new InputStreamReader( new FileInputStream(file)));  
    token = new StringTokenizer(br.readLine());  
    token.nextToken();  
    int user2 = Integer.parseInt(token.nextToken());  
    int nice2 = Integer.parseInt(token.nextToken());  
    int sys2 = Integer.parseInt(token.nextToken());  
    int idle2 = Integer.parseInt(token.nextToken());  
    
    return ( float )((user2 + sys2 + nice2) - (user1 + sys1 + nice1)) / ( float )((user2 + nice2 + sys2 + idle2) - (user1 + nice1 + sys1 + idle1));  
    }  
    }

同理：要获取LINUX的CPU温度（如果文件存在）：

InputStreamReader(new FileInputStream（new File("/proc/acpi/thermal_zone/THM/temperature")）

[http_www.jb51.net_article_75002.htm]: http://www.jb51.net/article/75002.htm