使用Sigar在不同操作系统遇到的坑

最近由于工作需要，需要监控服务器的内存和cpu的使用情况，使用Sigar来获取服务器的基础数据，下面是依赖的sigar包

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

@RequestMapping(value = "/sigar",method = RequestMethod.GET)public String siger() {SigerVO vo = new SigerVO();try{Sigar sigar = new Sigar();int ratioCPU = new BigDecimal(sigar.getCpuPerc().getCombined()).setScale(2,BigDecimal.ROUND_HALF_UP).multiply(new BigDecimal("100")).intValue();vo.setRatioCPU(ratioCPU);Mem mem = sigar.getMem();double totalMemory = new BigDecimal(mem.getTotal() / 1024.00 /1024.00 /1024.00).setScale(1, BigDecimal.ROUND_HALF_UP).doubleValue();vo.setTotalMemory(totalMemory);double useMemory = new BigDecimal(mem.getUsed() / 1024.00 /1024.00 /1024.00).setScale(1, BigDecimal.ROUND_HALF_UP).doubleValue();vo.setUseMemory(useMemory);double freeMemory = new BigDecimal(mem.getFree() / 1024.00 /1024.00 /1024.00).setScale(1, BigDecimal.ROUND_HALF_UP).doubleValue();vo.setFreeMemory(freeMemory);int ratioMemory = new BigDecimal(useMemory/totalMemory).setScale(2,BigDecimal.ROUND_HALF_UP).multiply(new BigDecimal("100")).intValue();vo.setRatioMemory(ratioMemory);}catch (SigarException ex){ex.printStackTrace();}logger.info("【内存与cpu】结果{}",vo.toString());return "success";}

public class SigerVO {/*** 当前时间(HH:mm:ss)*/private String nowTime;/*** cpu利用率*/private Integer ratioCPU;/*** 当前总内存(G)*/private double totalMemory;/*** 已使用内存(G)*/private double useMemory;/*** 剩余内存(G)*/private double freeMemory;/*** 内存使用率*/private Integer ratioMemory;public String getNowTime() {return nowTime;}public void setNowTime(String nowTime) {this.nowTime = nowTime;}public Integer getRatioCPU() {return ratioCPU;}public void setRatioCPU(Integer ratioCPU) {this.ratioCPU = ratioCPU;}public double getTotalMemory() {return totalMemory;}public void setTotalMemory(double totalMemory) {this.totalMemory = totalMemory;}public double getUseMemory() {return useMemory;}public void setUseMemory(double useMemory) {this.useMemory = useMemory;}public double getFreeMemory() {return freeMemory;}public void setFreeMemory(double freeMemory) {this.freeMemory = freeMemory;}public Integer getRatioMemory() {return ratioMemory;}public void setRatioMemory(Integer ratioMemory) {this.ratioMemory = ratioMemory;}@Overridepublic String toString() {return "SigerVO{" +"nowTime='" + nowTime + '\'' +", ratioCPU=" + ratioCPU +", totalMemory=" + totalMemory +", useMemory=" + useMemory +", freeMemory=" + freeMemory +", ratioMemory=" + ratioMemory +'}';}
}

在调用接口的时候突然报错了，

java.lang.UnsatisfiedLinkError: org.hyperic.sigar.Cpu.gather(Lorg/hyperic/sigar/Sigar;)Vat org.hyperic.sigar.Cpu.gather(Native Method)at org.hyperic.sigar.Cpu.fetch(Cpu.java:30)at org.hyperic.sigar.Sigar.getCpu(Sigar.java:320)at org.hyperic.sigar.Sigar.getCpuPerc(Sigar.java:341)at com.zhy.open.sigar.SigerDemo.siger(SigerDemo.java:32)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:498)at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)at javax.servlet.http.HttpServlet.service(HttpServlet.java:635)at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:108)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)at org.springframework.boot.web.support.ErrorPageFilter.doFilter(ErrorPageFilter.java:115)at org.springframework.boot.web.support.ErrorPageFilter.access$000(ErrorPageFilter.java:59)at org.springframework.boot.web.support.ErrorPageFilter$1.doFilterInternal(ErrorPageFilter.java:90)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)at org.springframework.boot.web.support.ErrorPageFilter.doFilter(ErrorPageFilter.java:108)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:496)at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803)at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:790)at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1468)at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)at java.lang.Thread.run(Thread.java:748)

之后各种找博客帖子，里面各种说法，经过实践，找到了问题的处理方法，

首先在不同的操作系统中需要不同的依赖文件

文件的下载地址可以去

sigar包的相关文件.zip

里面文件的目录是这样的

如果是windows系统，那么需要

sigar-amd64-winnt.dll(64位的)或者是sigar-x86-winnt.dll（32位系统的）

如果是linux系统，需要

libsigar-amd64-linux.so（64位系统的）或者libsigar-x86-linux.so（32位系统的）

放的路径就需要根据一个小小的程序来判断了

@RequestMapping(value = "/test",method = RequestMethod.GET)public String test(){String property = System.getProperty("java.library.path");logger.info("【java.library.path路径】{}",property);return property;}

在我linux系统输出的是：/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib

所以我们只需要放入其中一个文件夹里面就行，我这里放的是/usr/lib64目录下面，亲测正常使用，下面是查询出来的结果

【内存与cpu】结果SigerVO{nowTime='null', ratioCPU=2, totalMemory=1.8, useMemory=1.2, freeMemory=0.6, ratioMemory=67}

总结：sigar的依赖放置位置是根据 Sysytem.getProperty("java.library.path")获取的路径来确定的，有问题记录一下，激励自己，帮助他人，欢迎关注微信公总号"干活集市"，里面有海量整套视频教学的资源，总有一款适合你。

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