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			package com.dy.common.util;

			import lombok.Data;

			import java.net.UnknownHostException;
			import java.text.DecimalFormat;
			import java.util.Properties;

			/**
			* @Author: liurunyu
			* @Date: 2024/8/2 13:52
			* @Description
			*/
			public class SysJvmUtil {

			/**
			Java虚拟机信息
			*/
			public static JvmInfoVo info() throws UnknownHostException {
			JvmInfoVo vo = new JvmInfoVo() ;
			Properties props = System.getProperties();
			vo.setTotal(toMbytes(Runtime.getRuntime().totalMemory()));
			vo.setMax(toMbytes(Runtime.getRuntime().maxMemory()));
			vo.setFree(toMbytes(Runtime.getRuntime().freeMemory()));
			vo.setVersion(props.getProperty("java.version"));
			vo.setHome(props.getProperty("java.home"));
			return vo ;
			}

			private static double toMbytes(double value){
			return value/1000000.0 ;
			}

			@Data
			public static class JvmInfoVo {
			/**
			当前JVM占用的内存总数(M)
			*/
			public double total;

			/**
			JVM最大可用内存总数(M)
			*/
			public double max;

			/**
			JVM空闲内存(M)
			*/
			public double free;

			/**
			JDK版本
			*/
			public String version;

			/**
			JDK路径
			*/
			public String home;


			public String toString(){
			DecimalFormat df = new DecimalFormat("#.####"); // 设定格式
			StringBuilder sb = new StringBuilder() ;
			sb.append(" JVM信息：\n");
			sb.append(" JVM最大可用内存总数(M)：" + df.format(max) + "\n");
			sb.append(" JVM占用的内存数(M)：" + df.format(total) + "\n");
			sb.append(" JVM空闲内存数(M)：" + df.format(free) + "\n");
			sb.append(" JDK版本：" + version + "\n");
			sb.append(" JDK路径：" + home + "\n");

			return sb.toString() ;
			}
			}



			}