人不读书，则尘俗生其间，照镜则面目可憎，对人则语言无味。一一北宋·黄庭坚
首先是依赖
代码语言：javascript复制<!-- 获取系统信息 -->
<dependency>
<groupId>com.github.oshi</groupId>
<artifactId>oshi-core</artifactId>
<version>3.9.1</version>
</dependency>然后是工具类
代码语言：javascript复制package com.ruben.utils.server;
import oshi.SystemInfo;
import oshi.hardware.CentralProcessor;
import oshi.hardware.GlobalMemory;
import oshi.hardware.HardwareAbstractionLayer;
import oshi.software.os.FileSystem;
import oshi.software.os.OSFileStore;
import oshi.software.os.OperatingSystem;
import oshi.util.Util;
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
/**
* 服务器信息
*
* @author Administrator
*/
public class ServerOsInfo {
public static ServerInfo getInfo() {
ServerInfo info = new ServerInfo();
SystemInfo si = new SystemInfo();
HardwareAbstractionLayer hal = si.getHardware();
CentralProcessor processor = hal.getProcessor(); //获取cpu信息
info.setCpu(setCpuInfo(processor));
GlobalMemory memory = hal.getMemory(); //获取内存信息
info.setMem(setMemInfo(memory));
info.setSys(setSysInfo()); //服务器信息
info.setJvm(setJvmInfo()); //jvm信息
OperatingSystem op = si.getOperatingSystem();
info.setFile(setSysFiles(op)); //磁盘信息
info.setIp(getHostIp());
info.setHostname(getHostName());
return info;
}
/*
* cpu信息
*
* @param processor
*/
private static ServerInfo.Cpu setCpuInfo(CentralProcessor processor) { // CPU信息
long[] prevTicks = processor.getSystemCpuLoadTicks();
Util.sleep(1000);
long[] ticks = processor.getSystemCpuLoadTicks();
double nice = ticks[CentralProcessor.TickType.NICE.getIndex()] - prevTicks[CentralProcessor.TickType.NICE.getIndex()];
double irq = ticks[CentralProcessor.TickType.IRQ.getIndex()] - prevTicks[CentralProcessor.TickType.IRQ.getIndex()];
double softirq = ticks[CentralProcessor.TickType.SOFTIRQ.getIndex()] - prevTicks[CentralProcessor.TickType.SOFTIRQ.getIndex()];
double steal = ticks[CentralProcessor.TickType.STEAL.getIndex()] - prevTicks[CentralProcessor.TickType.STEAL.getIndex()];
/*
* CPU系统使用率
*/
double sys = ticks[CentralProcessor.TickType.SYSTEM.getIndex()] - prevTicks[CentralProcessor.TickType.SYSTEM.getIndex()];
/*
* CPU用户使用率
*/
double used = ticks[CentralProcessor.TickType.USER.getIndex()] - prevTicks[CentralProcessor.TickType.USER.getIndex()];
/*
* CPU当前等待率
*/
double iowait = ticks[CentralProcessor.TickType.IOWAIT.getIndex()] - prevTicks[CentralProcessor.TickType.IOWAIT.getIndex()];
/*
* CPU当前空闲率
*/
double free = ticks[CentralProcessor.TickType.IDLE.getIndex()] - prevTicks[CentralProcessor.TickType.IDLE.getIndex()];
/*
* CPU总的使用率
*/
double total = used nice sys free iowait irq softirq steal;
/*
* 核心数
*/
int cpuNum = processor.getLogicalProcessorCount();
/*
* CPU当前等待率
*/
ServerInfo.Cpu cpu = new ServerInfo.Cpu();
cpu.setCpucard(processor);//cpu信息
cpu.setNum(cpuNum);//cpu核心数
cpu.setUsed(round(mul((sys used) / total, 100), 2));//cpu 用户使用率;
cpu.setFree(round(mul(free / total, 100), 2));//cpu 空闲率
return cpu;
}
/**
* 内存信息
*/
private static ServerInfo.MemoryInfo setMemInfo(GlobalMemory memory) {
/*
* 内存总量
*/
double total = memory.getTotal();
/*
* 已用内存
*/
double used = memory.getTotal() - memory.getAvailable();
/*
* 剩余内存
*/
double free = memory.getAvailable();
ServerInfo.MemoryInfo mem = new ServerInfo.MemoryInfo();
mem.setTotal(div(total, (1024 * 1024 * 1024), 2));// 内存总大小
mem.setUsedMem(div(used, (1024 * 1024 * 1024), 2));// 已使用内存大小
mem.setFree(round(mul(free / total, 100), 2));// 剩余内存大小
mem.setUsed(round(mul(used / total, 100), 2));
return mem;
}
/*
* 服务器信息
*/
private static Properties setSysInfo() {
return System.getProperties();
}
/*
* Java虚拟机
*/
private static ServerInfo.Jvm setJvmInfo() {
ServerInfo.Jvm jvm = new ServerInfo.Jvm();
jvm.setTotal(div(Runtime.getRuntime().totalMemory(), 1024 * 1024, 2));
jvm.setMaxTotal(div(Runtime.getRuntime().maxMemory(), 1024 * 1024, 2));
jvm.setUsedMem(div((Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory()), 1024 * 1024, 2));
jvm.setUsed(round(mul((Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory()) * 1.0 / Runtime.getRuntime().totalMemory(), 100), 2));
return jvm;
}
/*
* 设置磁盘信息
*/
private static List<ServerInfo.FileItem> setSysFiles(OperatingSystem os) {
FileSystem fileSystem = os.getFileSystem();
OSFileStore[] fsArray = fileSystem.getFileStores();
List<ServerInfo.FileItem> list = new ArrayList<>();
for (OSFileStore fs : fsArray) {
long free = fs.getUsableSpace();
long total = fs.getTotalSpace();
long used = total - free;
ServerInfo.FileItem fileItem = new ServerInfo.FileItem();
fileItem.setPath(fs.getMount());
fileItem.setType(fs.getType());
fileItem.setName(fs.getName());
fileItem.setTotal(convertFileSize(total));
fileItem.setFree(convertFileSize(free));
fileItem.setUsed(convertFileSize(used));
fileItem.setRate(div(used, total, 4) * 100);
list.add(fileItem);
}
return list;
}
/*
* 字节转换
*
* @param size 字节大小
* @return 转换后值
*/
public static String convertFileSize(long size) {
long kb = 1024;
long mb = kb * 1024;
long gb = mb * 1024;
if (size >= gb) {
return String.format("%.1f GB", (float) size / gb);
} else if (size >= mb) {
float f = (float) size / mb;
return String.format(f > 100 ? "%.0f MB" : "%.1f MB", f);
} else if (size >= kb) {
float f = (float) size / kb;
return String.format(f > 100 ? "%.0f KB" : "%.1f KB", f);
} else {
return String.format("%d B", size);
}
}
/*
* 提供（相对）精确的除法运算。当发生除不尽的情况时，由scale参数指
* 定精度，以后的数字四舍五入。
*
* @param v1 被除数
* @param v2 除数
* @param scale 表示表示需要精确到小数点以后几位。
* @return 两个参数的商
*/
public static double div(double v1, double v2, int scale) {
return ((double) ((int) (v1 / v2 * Math.pow(10, scale)))) / Math.pow(10, scale);
}
/**
* 提供精确的小数位四舍五入处理。
*
* @param v 需要四舍五入的数字
* @param scale 小数点后保留几位
* @return 四舍五入后的结果
*/
public static double round(double v, int scale) {
if (scale < 0) {
throw new IllegalArgumentException(
"The scale must be a positive integer or zero");
}
BigDecimal b = new BigDecimal(Double.toString(v));
BigDecimal one = new BigDecimal("1");
return b.divide(one, scale, RoundingMode.HALF_UP).doubleValue();
}
/**
* 提供精确的乘法运算。
*
* @param v1 被乘数
* @param v2 乘数
* @return 两个参数的积
*/
public static double mul(double v1, double v2) {
BigDecimal b1 = new BigDecimal(Double.toString(v1));
BigDecimal b2 = new BigDecimal(Double.toString(v2));
return b1.multiply(b2).doubleValue();
}
public static String getHostIp() {
try {
return InetAddress.getLocalHost().getHostAddress();
} catch (UnknownHostException ignored) {
}
return "127.0.0.1";
}
public static String getHostName() {
try {
return InetAddress.getLocalHost().getHostName();
} catch (UnknownHostException ignored) {
}
return "未知";
}
public static void main(String[] args) {
System.out.println(div(19, 7, 4));
System.out.println(getInfo());
}
}运行main结果
