Java查询服务器(windows + linux)和系统各个指标数据 cpu、内存、硬盘、线程、请求错误数、平均响应时间、请求总数、jdbc活跃连接数、Session、被使用的jdbc数等（基于Dr

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.lang.management.ManagementFactory;
import java.lang.management.ThreadMXBean;
import java.math.BigDecimal;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Map;
import com.alibaba.druid.stat.DruidStatManagerFacade;
import com.alibaba.druid.support.http.stat.WebAppStatManager;

public class SystemMonitorHandler {

    @XxlJob(value = "systemIndexMonitor")
    public ReturnT<String> systemIndexMonitor(String params) throws IOException {
        //获取服务指标
        //获取系统服务器内存使用率
        OperatingSystemMXBean osmxb = (OperatingSystemMXBean) ManagementFactory.getOperatingSystemMXBean();
        long totalPhysicalMemorySize = osmxb.getTotalPhysicalMemorySize();
        long usedMemory = osmxb.getTotalPhysicalMemorySize() - osmxb.getFreePhysicalMemorySize();
        String memoryUsedRate = new DecimalFormat("#.##").format((double) usedMemory / (double) totalPhysicalMemorySize);
        //cpu使用率
        String osJson = JSON.toJSONString(osmxb);
        JSONObject jsonObject = JSON.parseObject(osJson);
        String systemCpuLoad = new DecimalFormat("#.##").format(jsonObject.getDouble("systemCpuLoad"));
        //线程活跃数
        ThreadMXBean thread = ManagementFactory.getThreadMXBean();
        int threadLiveSize = thread.getThreadCount();
        //请求错误数
        int requestErrorCount = 0;
        //平均响应数
        String requestAverageTime = "0.00";
        //请求总数
        int requestCount = 0;
        //jdbc活跃连接数
        int activeCount = 0;
        //Session数
        int httpSessionCount = 0;
        //被使用的jdbc数
        int physicalConnectCount = 0;
        try {
            List<Map<String, Object>> webAppStatData = WebAppStatManager.getInstance().getWebAppStatData();
            List<Map<String, Object>> uriStatData = WebAppStatManager.getInstance().getURIStatData();
            List<Map<String, Object>> dataSourceStatData = DruidStatManagerFacade.getInstance().getDataSourceStatDataList();
            if (!webAppStatData.isEmpty()) {
                requestCount = (int) webAppStatData.get(0).get("RequestCount");
                httpSessionCount= (int) webAppStatData.get(0).get("SessionCount");
            }
            if (!uriStatData.isEmpty()) {
                int requestTime = 0;
                for (Map<String, Object> uriStatDatum : uriStatData) {
                    requestErrorCount += (Integer) uriStatDatum.get("ErrorCount");
                    requestTime += (Integer) uriStatDatum.get("RequestTimeMillis");
                }
                requestAverageTime = new DecimalFormat("#.##").format(requestTime / requestCount);
            }
            if (!dataSourceStatData.isEmpty()) {
                activeCount = dataSourceStatData.get(0).get("ActiveCount") == null ? 0 : (int) dataSourceStatData.get(0).get("ActiveCount");
                physicalConnectCount = dataSourceStatData.get(0).get("PhysicalConnectCount") == null ? 0 : (int) dataSourceStatData.get(0).get("PhysicalConnectCount");
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        //磁盘信息
        //获取系统环境
        String osName = System.getProperty("os.name");
        if (osName.startsWith("Windows")) {
            osName = "windows";
            //设置保留位数
            DecimalFormat df=new DecimalFormat("0.00");
            //获取电脑所有磁盘信息
            File[] roots = File.listRoots();
            for (File file : roots) {
                long totalSpace = file.getTotalSpace();
                long freeSpace = file.getFreeSpace();
                long usedSpace = totalSpace - freeSpace;
                //转化占用磁盘大小
                float totalSpaceG = Float.parseFloat(df.format((float) totalSpace / 1024 / 1024 / 1024));
                float freeSpaceG = Float.parseFloat(df.format((float) freeSpace / 1024 / 1024 / 1024));
                float usedSpaceG = Float.parseFloat(df.format((float) usedSpace / 1024 / 1024 / 1024));
                log.info(file + " 容量 : " + totalSpaceG + "G, 可用 : " + freeSpaceG + "G, 已用 : " + usedSpaceG + "G");
            }
        } else {
            osName = "linux";
            try {
                Runtime rt = Runtime.getRuntime();
                Process p = rt.exec("df -hl");
                try (BufferedReader in = new BufferedReader(new InputStreamReader(p.getInputStream()))) {
                    String str;
                    int line = 0;
                    while ((str = in.readLine()) != null) {
                        line++;
                        if (line == 1) {
                            continue;
                        }
                        str = str.replaceAll("\\s+", " ");
                        String[] strArray = str.split(" ");
                        log.info("文件系统 " + strArray[0] + ", 容量 " + strArray[1] + ", 已用 " + strArray[2] + ", 可用 " + strArray[3] + ", 占比 " + strArray[4] + ", 挂载目录 " + strArray[5]);
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        log.info("当前服务运行系统为=>   " + osName);

        //3.将数据信息封装到SysMonitor对象并插入数据库
        log.info("memoryUsedRate:" + memoryUsedRate);
        log.info("requestCount:" + requestCount);
        log.info("activeCount:" + activeCount);
        log.info("physicalConnectCount:" + physicalConnectCount);
        log.info("cpuUsageSize:" + systemCpuLoad);
        log.info("threadLiveSize:" + threadLiveSize);
        log.info("requestErrorCount:" + requestErrorCount);
        log.info("httpSessionCount:" + httpSessionCount);
        log.info("requestAverageTime:" + requestAverageTime);
        return ReturnT.SUCCESS;
    }

  }