java oshi如何查看cpu信息

目录

oshi查看cpu信息

oshi可以跨平台查看服务器信息，其中cpu负载信息为当前占用cpu的时间。需要在一段时间内获取两次，然后相减得出这段时间内所占用的时间。这段时间除以总占用时间就是占用百分比。

pom引入依赖

<dependency>   <groupid>com.github.oshi</groupid>   <artifactid>oshi-core</artifactid>   <version>3.12.2</version></dependency>

测试类

package io.greatcolin.jvmmessage;import oshi.systeminfo;import oshi.hardware.centralprocessor;import oshi.hardware.globalmemory;import java.text.decimalformat;import java.util.properties;import java.util.concurrent.timeunit;/** * @author colin.cheng * @version v1.0 * @date created in 16:04 2019/8/16 */public class oshitest {    public static void main(string[] args) {        while (true){            try {                oshitest.printlncpuinfo();                oshitest.meminfo();                oshitest.getthread();                oshitest.tsysinfo();                oshitest.tjvminfo();                timeunit.conds.sleep(5);            }catch (exception e){                e.printstacktrace();            }        }    }    private static void printlncpuinfo() throws interruptedexception {        //system.out.println("----------------cpu信息----------------");        systeminfo systeminfo = new systeminfo();        centralprocessor processor = systeminfo.gethardware().getprocessor();        long[] prevticks = processor.getsystemcpuloadticks();        // 睡眠1s        timeunit.conds.sleep(1);        long[] ticks = processor.getsystemcpuloadticks();        long nice = ticks[centralprocessor.ticktype.nice.getindex()] - prevticks[centralprocessor.ticktype.nice.getindex()];        long irq = ticks[centralprocessor.ticktype.irq.getindex()] - prevticks[centralprocessor.ticktype.irq.getindex()];        long softirq = ticks[centralprocessor.ticktype.softirq.getindex()] - prevticks[centralprocessor.ticktype.softirq.getindex()];        long steal = ticks[centralprocessor.ticktype.steal.getindex()] - prevticks[centralprocessor.ticktype.steal.getindex()];        long csys = ticks[centralprocessor.ticktype.system.getindex()] - prevticks[centralprocessor.ticktype.system.getindex()];        long ur = ticks[centralprocessor.ticktype.ur.getindex()] - prevticks[centralprocessor.ticktype.ur.getindex()];        long iowait = ticks[centralprocessor.ticktype.iowait.getindex()] - prevticks[centralprocessor.ticktype.iowait.getindex()];        long idle = ticks[centralprocessor.ticktype.idle.getindex()] - prevticks[centralprocessor.ticktype.idle.getindex()];        long totalcpu = ur + nice + csys + idle + iowait + irq + softirq + steal;        system.out.println("----------------cpu信息----------------");        system.out.println("cpu核数:" + processor.getlogicalprocessorcount());        system.out.println("cpu系统使用率:" + new decimalformat("#.##%").format(csys * 1.0 / totalcpu));        system.out.println("cpu用户使用率:" + new decimalformat("#.##%").format(ur * 1.0 / totalcpu));        system.out.println("cpu当前等待率:" + new decimalformat("#.##%").format(iowait * 1.0 / totalcpu));        system.out.println("cpu当前使用率:" + new decimalformat("#.##%").format(1.0-(idle * 1.0 / totalcpu)));    }    public static void meminfo(){        system.out.println("----------------主机内存信息----------------");        systeminfo systeminfo = new systeminfo();        globalmemory memory = systeminfo.gethardware()thick是什么意思.getmemory();        //总内存        long totalbyte = memory.gettotal();        //剩余        long acaliablebyte = memory.getavailable();        system.out.println("总内存 = " + formatbyte(totalbyte));        system.out.println("使用" + formatbyte(totalbyte-acaliablebyte));        system.out.println("剩余内存 = " + formatbyte(acaliablebyte));        system.out.println("使用率：" + new decimalformat("#.##%").format((totalbyte-acaliablebyte)*1.0/totalbyte));    }    public static void tsysinfo(){        system.out.println("----------------操作系统信息----------------");        properties props = system.getproperties();        //系统名称        string osname = props.getproperty("os.name");        //架构名称        string osarch = props.getproperty("os.arch");        system.out.println("操作系统名 = " + osname);        system.out.println("系统架构 = " + osarch);    }    public static void tjvminfo(){        system.out.println("----------------jvm信息----------------");        properties props = system.getproperties();        runtime runtime = runtime.getruntime();        //jvm总内存        long jvmtotalmemorybyte = runtime.totalmemory();        //jvm最大可申请        long jvmmaxmorybyte = runtime.maxmemory();        //空闲空间        long freememorybyte = runtime.freememory();        //jdk版本        string jdkversion = props.getproperty("java.version");        //jdk路径        string jdkhome = props.getproperty("java.home");        system.out.println("jvm内存总量 = " + formatbyte(jvmtotalmemorybyte));        system.out.println("jvm已使用内存 = " + formatbyte(jvmtotalmemorybyte-freememorybyte));        system.out.println("jvm剩余内存 = " + formatbyte(freememorybyte));   简短笑话     system.out.println("jvm内存使用率 = " + new decimalformat("#.##%").format((jvmtotalmemorybyte-freememorybyte)*1.0/jvmtotalmemorybyte));        system.out.println("java版本 = " + jdkversion);        //system.out.println("jdkhome = " + jdkhome);    }    public static void getthread(){        system.out.println("----------------线程信息----------------");        threadgroup currentgroup =thread.currentthread().getthreadgroup();        while (currentgroup.getparent()!=null){          // 返回此线程组的父线程组          currentgroup=currentgroup.getparent();        }        //此线程组中活动线程的估计数        int nothreads = currentgroup.activecount();        thread[] lstthreads = new thread[nothreads];        //把对此线程组中的所有活动子组的引用复制到指定数组中。        currentgroup.enumerate(lstthreads);        for (thread thread : lstthreads) {          system.out.println("线程数量："+nothreads+" 线程id：" + thread.getid() + " 线程名称：" + thread.getname() + " 线程状态：" + thread.getstate());        }    }    public static string formatbyte(long bytenumber){        //换算单位        double format = 1024.0;        double kbnumber = bytenumber/format;        if(kbnumber<format){            return new decimalformat("#.##kb").format(kbnumber);        }        double mbnumber = kbnumber/format;        if(mbnumber<format){            return new decimalformat("#.##mb").format(mbn爱之罪umber);        }        double gbnumber = mbnumber/format;        if(gbnumber<format){            return new decimalformat("#.##gb").format(gbnumber);        }        double tbnumber = gbnumber/format;        return new decimalformat("#.##tb").format(tbnumber);    }}

输出结果

# 没添加slf4j的依赖，不影响
slf4j: failed to load class “org.slf4j.impl.staticloggerbinder”.
slf4j: defaulting to no-operation (nop) logger implementation
slf4j: e http://www.slf4j.org/codes.html#staticloggerbinder for further details.
—————-cpu信息—————-
cpu核数:4
cpu系统使用率:1.88%
cpu用户使用率:2.73%
cpu当前等待率:0%
cpu当前使用率:4.71%
—————-主机内存信息—————-
总内存 = 7.88gb
使用5.89gb
剩余内存 = 1.99gb
使用率：74.72%
—————-线程信息—————-
线程数量：5 线程id：2 线程名称：reference handler 线程状态：waiting
线程数量：5 线程id：3 线程名称：finalizer 线程状态：waiting
线程数量：5 线程id：4 线程名称：signal dispatcher 线程状态：runnable
线程数量：5 线程id：5 线程名称：attach listener 线程状态：runnable
线程数量：5 线程id：1 线程名称：main 线程状态：runnable
—————-操作系统信息————&拉莫斯女友#8212;-
操作系统名 = windows 7
系统架构 = amd64
—————-jvm信息—————-
jvm内存总量 = 123mb
jvm已使用内存 = 20.46mb
jvm剩余内存 = 102.54mb
jvm内存使用率 = 16.64%
java版本 = 1.8.0_65

oshi获取cpu/内存使用率前十的进程

cpu

@overridepublic void getfirstcpuud() {  operatingsystem windowsoperatingsystem = new windowsoperatingsystem();  list<osprocess> processlist = windowsoperatingsystem.getprocess(10, operatingsystem.processsort.cpu);  for (osprocess process : processlist) {    //进程名，进程id，进程cpu使用率    system.out.println(string.format("name:%s pid: %d cpu:%.3f",        process.getname(),process.getprocessid(),        process.getprocesscpuloadcumulative()));  }}

内存

public void getfirstmemud(){  operatingsystem windowsoperatingsystem = new windowsoperatingsystem();  list<osprocess> processlist = windowsoperatingsystem.getprocess(10, operatingsystem.processsort.memory);  for (osprocess process : processlist) {    //进程名，京城id，进程cpu使用率    system.out.println(string.format("name:%s pid: %d cpu:%.3f",        process.getname(),process.getprocessid(),        process.getprocesscpuloadcumulsuggest用法ative()));  }}

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