package com.dy.common.util;
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import lombok.Data;
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import java.net.UnknownHostException;
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import java.text.DecimalFormat;
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import java.util.Properties;
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/**
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* @Author: liurunyu
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* @Date: 2024/8/2 13:52
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* @Description
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*/
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public class SysJvmUtil {
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/**
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Java虚拟机信息
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*/
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public static JvmInfoVo info() throws UnknownHostException {
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JvmInfoVo vo = new JvmInfoVo() ;
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Properties props = System.getProperties();
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vo.setTotal(toMbytes(Runtime.getRuntime().totalMemory()));
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vo.setMax(toMbytes(Runtime.getRuntime().maxMemory()));
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vo.setFree(toMbytes(Runtime.getRuntime().freeMemory()));
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vo.setVersion(props.getProperty("java.version"));
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vo.setHome(props.getProperty("java.home"));
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return vo ;
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}
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private static double toMbytes(double value){
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return value/1000000.0 ;
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}
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@Data
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public static class JvmInfoVo {
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/**
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当前JVM占用的内存总数(M)
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*/
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public double total;
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/**
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JVM最大可用内存总数(M)
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*/
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public double max;
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/**
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JVM空闲内存(M)
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*/
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public double free;
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/**
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JDK版本
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*/
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public String version;
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/**
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JDK路径
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*/
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public String home;
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public String toString(){
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DecimalFormat df = new DecimalFormat("#.####"); // 设定格式
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StringBuilder sb = new StringBuilder() ;
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sb.append(" JVM信息：\n");
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sb.append(" JVM最大可用内存总数(M)：" + df.format(max) + "\n");
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sb.append(" JVM占用的内存数(M)：" + df.format(total) + "\n");
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sb.append(" JVM空闲内存数(M)：" + df.format(free) + "\n");
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sb.append(" JDK版本：" + version + "\n");
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sb.append(" JDK路径：" + home + "\n");
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return sb.toString() ;
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}
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}
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}
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