java项目运行时信息获取

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;

    @Override
    public 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 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> 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 {

    @Override
    public void afterPropertiesSet() throws Exception {
        SpringEnvironmentUtils.printPropertyValue("spring.cloud.nacos.server-addr");
        ServerUtils.printAvailableProcessors();
        SystemUtils.printOsName();
        JvmUtils.printJvmInfo();
        SpringEnvironmentUtils.printAllEnvironmentInfo();
    }

    @Override
    public 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