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大体思路如下，想要获取启动时处理器数量、jvm 相关信息，操作系统信息、运行机器信息

运行机器信息

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;import java.lang.invoke.MethodHandles;/*** 机器工具类*/
public abstract class ServerUtils {private static final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());/*** 获取可用处理器数量** @return*/public static int getAvailableProcessors() {return Runtime.getRuntime().availableProcessors();}public static void printAvailableProcessors() {logger.info("processors={}", Runtime.getRuntime().availableProcessors());}
}

系统信息

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;import java.lang.invoke.MethodHandles;/*** 系统信息工具类** @author Rike* @date 2023/6/28*/
public abstract class SystemUtils {private static final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());public static String getOsName() {return System.getProperty("os.name");}public static void printOsName() {logger.info("os.name={}", System.getProperty("os.name"));}public static boolean isWindows() {return getOsName().startsWith("Windows");}public static boolean isLinux() {return getOsName().startsWith("Linux");}public static boolean isWindows(String osName) {return osName.startsWith("Windows");}public static boolean isLinux(String osName) {return osName.startsWith("Linux");}
}

通过 System.getProperty() 实现。

jvm 信息

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;import java.lang.invoke.MethodHandles;
import java.lang.management.ManagementFactory;
import java.lang.management.RuntimeMXBean;/*** jvm 信息工具类*/
public abstract class JvmUtils {private static final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());/*** 打印 jvm 信息*/public static void printJvmInfo() {RuntimeMXBean runtimeMXBean = ManagementFactory.getRuntimeMXBean();logger.info("jvm name={}", runtimeMXBean.getName());logger.info("class={}", runtimeMXBean.getClass());logger.info("java.class.path={}", runtimeMXBean.getClassPath());logger.info("java.library.path={}", runtimeMXBean.getLibraryPath());logger.info("bootClassPath={}", runtimeMXBean.getBootClassPath());logger.info("java.vm.vendor={}", runtimeMXBean.getVmVendor());logger.info("java.vm.name={}", runtimeMXBean.getVmName());logger.info("java.vm.version={}", runtimeMXBean.getVmVersion());logger.info("java.vm.specification.name={}", runtimeMXBean.getSpecName());logger.info("java.vm.specification.vendor={}", runtimeMXBean.getSpecVendor());logger.info("java.vm.specification.version={}", runtimeMXBean.getSpecVersion());logger.info("java.version={}", System.getProperty("java.version"));logger.info("java.runtime.version={}", System.getProperty("java.runtime.version"));logger.info("java.class.version={}", System.getProperty("java.class.version"));logger.info("inputArguments={}", runtimeMXBean.getInputArguments());logger.info("managementSpecVersion={}", runtimeMXBean.getManagementSpecVersion());logger.info("startTime={}", runtimeMXBean.getStartTime());logger.info("uptime={}", runtimeMXBean.getUptime());/*logger.info("+++++++++++++++++++++++++++++++++++++++");runtimeMXBean.getSystemProperties().entrySet().parallelStream().forEach(entry -> {System.out.println(entry.getKey() + "=" + entry.getValue());});logger.info("+++++++++++++++++++++++++++++++++++++++");*/}
}

通过 ManagementFactory 获取 RuntimeMXBean 对象获取相关信息。

spring 环境信息

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.core.env.ConfigurableEnvironment;
import org.springframework.core.env.EnumerablePropertySource;
import org.springframework.core.env.PropertySource;
import org.springframework.stereotype.Component;import java.lang.invoke.MethodHandles;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;/*** spring Environment 信息获取工具类*/
@Component
public class SpringEnvironmentUtils implements ApplicationContextAware {private static final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());private static ConfigurableEnvironment environment = null;@Overridepublic void setApplicationContext(ApplicationContext applicationContext) throws BeansException {environment = (ConfigurableEnvironment) applicationContext.getBean(ConfigurableApplicationContext.ENVIRONMENT_BEAN_NAME);}public static void printPropertyValue(String property) {logger.info("[{}]={}", property, environment.getProperty(property));}public static String getPropertyValue(String property) {return environment.getProperty(property);}/*** 打印所有的 Environment 信息*/public static void printAllEnvironmentInfo() {// printSystemEnvironment();// printSystemProperties();printPropertySources();printProfiles();}public static void printSystemEnvironment() {logger.info("+++++++++++++++++++++++++++++++++++++++");logger.info("print system environment begin");logger.info("+++++++++++++++++++++++++++++++++++++++");environment.getSystemEnvironment().entrySet().parallelStream().forEach(entry -> {// System.out.println(entry.getKey() + "=" + entry.getValue());logger.info("{}={}", entry.getKey(), entry.getValue());});logger.info("+++++++++++++++++++++++++++++++++++++++");logger.info("print system environment end");logger.info("+++++++++++++++++++++++++++++++++++++++");Map<String, String> map = System.getenv();map.entrySet().stream().forEach(entry -> {// System.out.println(entry.getKey() + "=" + entry.getValue());logger.info("{}={}", entry.getKey(), entry.getValue());});}public static void printSystemProperties() {logger.info("+++++++++++++++++++++++++++++++++++++++");logger.info("print system properties begin");logger.info("+++++++++++++++++++++++++++++++++++++++");environment.getSystemProperties().entrySet().parallelStream().forEach(entry -> {// System.out.println(entry.getKey() + "=" + entry.getValue());logger.info("{}={}", entry.getKey(), entry.getValue());});logger.info("+++++++++++++++++++++++++++++++++++++++");logger.info("print system properties end");logger.info("+++++++++++++++++++++++++++++++++++++++");}public static void printPropertySources() {logger.info("+++++++++++++++++++++++++++++++++++++++");logger.info("print property sources begin");logger.info("+++++++++++++++++++++++++++++++++++++++");// 筛选继承 EnumerablePropertySource 的类和实现 Map 的类List<PropertySource<?>> list = environment.getPropertySources().stream().filter(ps -> (ps instanceof EnumerablePropertySource && ps.getSource() instanceof Map)).collect(Collectors.toList());list.stream().forEach(ps -> {String name = ps.getName();logger.info("[{}] include property and value begin", name);Map source = (Map) ps.getSource();StringBuffer stringBuffer = new StringBuffer();int size = source.entrySet().size();// 记录当前下标int index = -1;for (Object entry : source.entrySet()) {index++;Map.Entry temp = (Map.Entry) entry;// System.out.println(temp.getKey() + "="+ temp.getValue());// logger.info("{}={}", temp.getKey(), temp.getValue());// 将参数进行拼接方便日志打印stringBuffer.append(temp.getKey()).append("=").append(temp.getValue());/*** 换行符打印的情况** 总数量大于1** 下标小于总数减1**/if (size > 1 && index < size -1) {stringBuffer.append("\n");}}// 拼接的字符串不为空时打印if (stringBuffer.length() > 0) {logger.info("{}", stringBuffer);}logger.info("[{}] include property and value end", name);});logger.info("+++++++++++++++++++++++++++++++++++++++");logger.info("print property sources end");logger.info("+++++++++++++++++++++++++++++++++++++++");}public static void printProfiles() {logger.info("+++++++++++++++++++++++++++++++++++++++");logger.info("print profiles begin");logger.info("+++++++++++++++++++++++++++++++++++++++");String[] defaultProfiles = environment.getDefaultProfiles();logger.info("defaultProfiles={}", defaultProfiles);String[] activeProfiles = environment.getActiveProfiles();logger.info("activeProfiles={}", activeProfiles);logger.info("+++++++++++++++++++++++++++++++++++++++");logger.info("print profiles end");logger.info("+++++++++++++++++++++++++++++++++++++++");}
}

借助于 ApplicationContext 获取 ConfigurableEnvironment 对象，进而获取 System.getProperty() 和 System.getenv() 相关信息。

整合

import org.springframework.beans.factory.InitializingBean;
import org.springframework.core.Ordered;
import org.springframework.stereotype.Component;/*** 启动信息*/
@Component
public class StartInfo implements InitializingBean, Ordered {@Overridepublic void afterPropertiesSet() throws Exception {SpringEnvironmentUtils.printPropertyValue("spring.cloud.nacos.server-addr");ServerUtils.printAvailableProcessors();SystemUtils.printOsName();JvmUtils.printJvmInfo();SpringEnvironmentUtils.printAllEnvironmentInfo();}@Overridepublic int getOrder() {return LOWEST_PRECEDENCE;}
}

创建一个类实现 InitializingBean 接口，添加 @Component 注解，在 spring ioc 容器启动时执行其中的逻辑，对代码无侵入性，无需修改其他代码即可实现最终的功能。

参考链接

https://blog.csdn.net/qq742143797/article/details/113553660