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：

<!-- https://mvnrepository.com/artifact/org.fusesource/sigar --><dependency>    <groupId>org.fusesource</groupId>    <artifactId>sigar</artifactId>    <version>1.6.4</version></dependency>

gradle导入：

//https://mvnrepository.com/artifact/org.fusesource/sigarcompile 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;/** *  <p>Description：</p> *  <p>Copyright：Copyright (c) 2016</p> *  <p>Company：//////</p> *  <p>Email：///////</p> *   *  @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<String,Object> retMap = Maps.newHashMap();        CpuInfo[] cpuInfos = getInstance().getCpuInfoList();        CpuPerc[] cpuPercs = getInstance().getCpuPercList();        int count = cpuInfos.length;        for (int i = 0; i < count; i++) {            Map<String, Object> 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<String, Object> 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"}