Sigar linux系统中 java编程简单实用例子

1.下载Sigar (主要是要获取sigar.jar 和so文件)
wget http://downloads.sourceforge.net/project/sigar/sigar/1.6/hyperic-sigar-1.6.4-src.tar.gz
wget http://downloads.sourceforge.net/project/sigar/sigar/1.6/hyperic-sigar-1.6.4-src.tar.gz
tar zxf hyperic-sigar-1.6.4-src.tar.gz
cd hyperic-sigar-1.6.4-src
cd src
cd bindings
cd java
ant （没有ant时候，先安装ant）

2.拷贝出需要的jar包（sigar.jar）和so文件（libsigar-amd64-linux.so，libsigar-x86-linux.so）

so文件在bindings/Java/sigar-bin/lib中，把libsigar-amd64-linux.so文件放入/usr/lib64/中，需要sudo chmod 744 或 chmod 777 -R 修改libsigar-amd64-linux.so文件权限。(根据自己电脑是32/64位选择)

将jar包导入java工程，这个jar包也在bindings/Java/sigar-bin/lib中。

也可以maven导入：

<dependency>
    <groupId>org.fusesourcegroupId>
    <artifactId>sigarartifactId>
    <version>1.6.4version>
dependency>

gradle导入：

//https://mvnrepository.com/artifact/org.fusesource/sigar
compile group: 'org.fusesource', name: 'sigar', version: '1.6.4'

3.在java项目中创建工具类(类中用的import有的你可能没有，自己下载或是找其他替换就好)
只获取cpu和内存信息，其他类似，可以自己扩展。

import java.util.Map;

import com.alibaba.fastjson.JSON;
import com.google.api.client.util.Maps;
import org.hyperic.sigar.CpuInfo;
import org.hyperic.sigar.CpuPerc;
import org.hyperic.sigar.Mem;
import org.hyperic.sigar.Sigar;
import org.hyperic.sigar.SigarException;
import org.hyperic.sigar.Swap;

/**
 *  
Description：
 *  
Copyright：Copyright (c) 2016
 *  
Company：//////
 *  
Email：///////
 *  
 *  @author weijian
 *  @date 16-10-25:下午2:04
 *  
 */
public class SigarUtils {
    private static Sigar sigar;
    public static Sigar getInstance() {
        if (null == sigar) {
            sigar = new Sigar();
        }
        return sigar;
    }
    /**
     * 获取cpu信息返回json
     *
     * @return String
     * @throws SigarException
     */
    public static String getCpuInfosListMap() throws SigarException {
        Map retMap = Maps.newHashMap();
        CpuInfo[] cpuInfos = getInstance().getCpuInfoList();
        CpuPerc[] cpuPercs = getInstance().getCpuPercList();
        int count = cpuInfos.length;
        for (int i = 0; i < count; i++) {
            Map cpuMap = Maps.newHashMap();
            cpuMap.put("amounts", cpuInfos[i].getMhz());//总量Mhz
            cpuMap.put("Vendor", cpuInfos[i].getVendor());//供应商
            cpuMap.put("model", cpuInfos[i].getModel());//类型
            cpuMap.put("cacheSize", cpuInfos[i].getCacheSize());//缓冲存储器数量
            cpuMap.put("user", cpuPercs[i].getUser());//用户使用率
            cpuMap.put("sys", cpuPercs[i].getSys());//系统使用率
            cpuMap.put("wait", cpuPercs[i].getWait());//当前等待率
            cpuMap.put("nice", cpuPercs[i].getNice());//错误率
            cpuMap.put("idle", cpuPercs[i].getIdle());//空闲率
            cpuMap.put("combined", cpuPercs[i].getCombined());//总使用率
            retMap.put("cpu"+ i, cpuMap);
        }
        return JSON.toJSONString(retMap);
    }
    /**
     * 获取内存信息返回json
     *
     * @return
     * @throws SigarException
     */
    public static String getMemoryInfosMap() throws SigarException {
        Map retmap = Maps.newHashMap();
        Mem mem = getInstance().getMem();
        Swap swap = getInstance().getSwap();
        retmap.put("Total", mem.getTotal() / 1024L + "K");
        retmap.put("Used", mem.getUsed() / 1024L + "K");
        retmap.put("Free", mem.getFree() / 1024L + "K");
        retmap.put("swapTotal", swap.getTotal() / 1024L + "K");
        retmap.put("swapUsed", swap.getUsed() / 1024L + "K");
        retmap.put("swapFree", swap.getFree() / 1024L + "K");
        return JSON.toJSONString(retmap);
    }
    public static void main(String[] args){
        try {
            System.out.println(SigarUtils.getCpuInfosListMap());
            System.out.println(SigarUtils.getMemoryInfosMap());
        }  catch (SigarException e) {
        }
    }
}

运行结果：(json格式，可自己修改)

{  
   "cpu2":{  
      "wait":0,
      "cacheSize":6144,
      "amounts":3700,
      "idle":0.2916666666666667,
      "model":"Core(TM) i5-4590 CPU @ 3.30GHz",
      "Vendor":"Intel",
      "combined":0.7083333333333333,
      "sys":0.16666666666666666,
      "user":0.5416666666666666,
      "nice":0
   },
   "cpu3":{  
      "wait":0,
      "cacheSize":6144,
      "amounts":3700,
      "idle":0.6326530612244898,
      "model":"Core(TM) i5-4590 CPU @ 3.30GHz",
      "Vendor":"Intel",
      "combined":0.36734693877551017,
      "sys":0.08163265306122448,
      "user":0.2857142857142857,
      "nice":0
   },
   "cpu0":{  
      "wait":0,
      "cacheSize":6144,
      "amounts":3700,
      "idle":0.6458333333333334,
      "model":"Core(TM) i5-4590 CPU @ 3.30GHz",
      "Vendor":"Intel",
      "combined":0.3541666666666667,
      "sys":0.0625,
      "user":0.2916666666666667,
      "nice":0
   },
   "cpu1":{  
      "wait":0,
      "cacheSize":6144,
      "amounts":3700,
      "idle":0.52,
      "model":"Core(TM) i5-4590 CPU @ 3.30GHz",
      "Vendor":"Intel",
      "combined":0.48000000000000004,
      "sys":0.08,
      "user":0.4,
      "nice":0
   }
}
{  
   "swapFree":"6711980K",
   "Used":"7766396K",
   "swapUsed":"1554768K",
   "Total":"8055600K",
   "swapTotal":"8266748K",
   "Free":"289204K"
}