java获取jvm内存信息 java获取jvm运行信息 java获取jvm运行信息
- 1、创建需要使用的工具类
- 2、创建一个 jvm信息对象类
- 3、使用
1、创建需要使用的工具类
文件名 ByteConverter.java 用于将字节数值转为 MB数值
import java.math.BigDecimal;
import java.math.RoundingMode;/*** <h2>字节数值转换</h2>* <p>** </p>** @author * @since **/
public class ByteConverter {/*** 将字节数量转换为MB** @param bytes 字节数量* @return 对应的MB*/public static BigDecimal bytesToMB(double bytes) {BigDecimal bytesConver = BigDecimal.valueOf(bytes);// 字节数量转换MB = 字节数 / (1024 * 1024)BigDecimal conditions = BigDecimal.valueOf(1048576L);return bytesConver.divide(conditions, 2, RoundingMode.HALF_UP);}}
2、创建一个 jvm信息对象类
import java.math.BigDecimal;
import java.math.RoundingMode;
import cn.hutool.core.lang.Singleton;/*** <h2>JVM运行信息</h2>* <p>** </p>** @author * @since **/
public class JvmInfo {/*** 单例模式，使用 hutool工具，也可以自己实现，也可以直接不用单例模式 直接new*/private static JvmInfo info = Singleton.get(JvmInfo.class);/*** JVM已用内存*/private BigDecimal usedMemory;/*** JVM最大可用内存*/private BigDecimal maxMemory;/*** JVM剩余内存*/private BigDecimal freeMemory;/*** jdk安装路径*/private String jdkHome;/*** jdk版本*/private String jdkVersion;/*** JVM内存使用率*/private BigDecimal usage;private JvmInfo(){}public static JvmInfo getInstans() {Runtime runtime = Runtime.getRuntime();info.setUsedMemory(ByteConverter.bytesToMB(runtime.totalMemory() - runtime.freeMemory()));info.setMaxMemory(ByteConverter.bytesToMB(Runtime.getRuntime().maxMemory()));info.setFreeMemory(ByteConverter.bytesToMB(Runtime.getRuntime().freeMemory()));info.setUsage(info.getUsedMemory().divide(info.getMaxMemory(), 2, RoundingMode.HALF_UP).multiply(new BigDecimal("100")));info.setJdkVersion(System.getProperty("java.version"));info.setJdkHome(System.getProperty("java.home"));return info;}public String getJdkVersion() {return jdkVersion;}public void setJdkVersion(String jdkVersion) {this.jdkVersion = jdkVersion;}public BigDecimal getUsage() {return usage;}public void setUsage(BigDecimal usage) {this.usage = usage;}public BigDecimal getUsedMemory() {return usedMemory;}public void setUsedMemory(BigDecimal usedMemory) {this.usedMemory = usedMemory;}public BigDecimal getMaxMemory() {return maxMemory;}public void setMaxMemory(BigDecimal maxMemory) {this.maxMemory = maxMemory;}public BigDecimal getFreeMemory() {return freeMemory;}public void setFreeMemory(BigDecimal freeMemory) {this.freeMemory = freeMemory;}public String getJdkHome() {return jdkHome;}public void setJdkHome(String jdkHome) {this.jdkHome = jdkHome;}
}
3、使用
public static void main(String[] args) {System.out.printf("JVM运行信息：%s", JvmInfo.getInstans());}
)
