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Java9中操作和查詢本地進(jìn)程信息的示例詳解

更新時(shí)間：2024年03月10日 11:34:04 作者：ljh_learn_from_base

這篇文章主要為大家詳細(xì)介紹了Java9中操作和查詢本地進(jìn)程信息的相關(guān)知識(shí),文中的示例代碼講解詳細(xì),感興趣的小伙伴可以跟隨小編一起學(xué)習(xí)一下

打開某個(gè)進(jìn)程并獲取進(jìn)程信息

    /**
     * 打開某個(gè)進(jìn)程并獲取進(jìn)程信息
     * @throws IOException
     */
    public static void startAndGetProcessInfo() throws IOException {
        //這里可以輸入命令 如cmd命令、打開軟件命令:這里以打開window系統(tǒng)的計(jì)算器為例
        //ProcessBuilder是jdk 1.5提供的
        ProcessBuilder pb = new ProcessBuilder("calc.exe");
        String na = "<not available>";
        //開啟計(jì)算器進(jìn)程
        Process p = pb.start();
        //p.info()是Java 9才有的
        ProcessHandle.Info info = p.info();
        System.out.printf("Process ID: %s%n", p.pid());
        System.out.printf("Command name: %s%n", info.command().orElse(na));
        System.out.printf("Command line: %s%n", info.commandLine().orElse(na));
        System.out.printf("Start time: %s%n",info.startInstant().map(i -> i.atZone(ZoneId.systemDefault()).toLocalDateTime().toString()).orElse(na));
        System.out.printf("Arguments: %s%n",info.arguments().map(a -> Stream.of(a).collect(Collectors.joining(" "))) .orElse(na));
        System.out.printf("User: %s%n", info.user().orElse(na));

        // 一般來說，對(duì)于計(jì)算器這樣的獨(dú)立進(jìn)程，不需要讀取其輸出或等待其終止
        // 但對(duì)于良好的編程習(xí)慣，特別是需要確保進(jìn)程資源被正確關(guān)閉時(shí)，可以考慮添加以下代碼
        // process.waitFor(); // 等待進(jìn)程執(zhí)行完畢
        // process.getInputStream().close();
        // process.getOutputStream().close();
        // process.getErrorStream().close();
    }

在Java 9中，ProcessHandle類提供了操作和查詢本地進(jìn)程中信息的能力

 public static void processHandleTest() {
        // 獲取當(dāng)前進(jìn)程的進(jìn)程ID（PID）
        long currentProcessId = ProcessHandle.current().pid();
        System.out.println("Current Process ID: " + currentProcessId);

        // 獲取當(dāng)前進(jìn)程的子進(jìn)程列表
        ProcessHandle.current().children().forEach(child -> {
            System.out.println("Child Process ID: " + child.pid() + ", Name: " + child.info().command().orElse("<unknown command>"));
        });

        // 獲取當(dāng)前進(jìn)程的父進(jìn)程
        Optional<ProcessHandle> parent = ProcessHandle.current().parent();
        if(parent.isPresent()){
            ProcessHandle processHandle = parent.get();
            System.out.println("Parent Process ID: " + processHandle.pid() + ", Name: " + processHandle.info().command().orElse("<unknown command>"));
        }

        //獲取資源管理器中的所有進(jìn)程并按照可執(zhí)行路徑名稱排序
        ProcessHandle.allProcesses()
                .sorted(Comparator.comparing(x->x.info().command().orElse("")))
                .forEach(processHandle -> System.out.println("processHandle Process ID: " + processHandle.pid() + ", Name: " + processHandle.info().command().orElse("<unknown command>")));
        //關(guān)閉某個(gè)軟件的所有進(jìn)程
       // ProcessHandle.allProcesses().filter(x->x.info().command().orElse("").equals("D:\\Program Files\\Google\\Chrome\\Application\\chrome.exe")).collect(Collectors.toList()).forEach(x->destroyProcessById(x.pid()));

        // 假設(shè)我們有一個(gè)目標(biāo)進(jìn)程的PID
       // long targetProcessId = 31384; // 請(qǐng)?zhí)鎿Q為實(shí)際的進(jìn)程ID
        // 嘗試獲取并銷毀目標(biāo)進(jìn)程
       // destroyProcessById(targetProcessId);
    }

銷毀進(jìn)程

/**
     * 銷毀進(jìn)程
     * @param targetProcessId
     */
    private static void destroyProcessById(long targetProcessId) {
        Optional<ProcessHandle> targetProcessOpt = ProcessHandle.of(targetProcessId);
        if (targetProcessOpt.isPresent()) {
            ProcessHandle targetProcess = targetProcessOpt.get();
            targetProcess.destroy(); // 發(fā)送SIGTERM信號(hào)
            targetProcess.onExit().thenRun(() -> {
                System.out.println("目標(biāo)進(jìn)程Id " + targetProcess.pid() + " 已經(jīng)被銷毀");
            });
        } else {
            System.out.println("沒有找到對(duì)應(yīng)的進(jìn)程Id " + targetProcessId);
        }
    }

完整代碼

import java.io.IOException;
import java.time.ZoneId;
import java.util.Comparator;
import java.util.List;
import java.util.Optional;
import java.util.stream.Collectors;
import java.util.stream.Stream;

public class ProcessHandleDemo {

    public static void main(String[] args) throws Exception {
        processHandleTest();
    }

    /**
     * 打開某個(gè)進(jìn)程并獲取進(jìn)程信息
     * @throws IOException
     */
    public static void startAndGetProcessInfo() throws IOException {
        //這里可以輸入命令 如cmd命令、打開軟件命令:這里以打開window系統(tǒng)的計(jì)算器為例
        //ProcessBuilder是jdk 1.5提供的
        ProcessBuilder pb = new ProcessBuilder("calc.exe");
        String na = "<not available>";
        //開啟計(jì)算器進(jìn)程
        Process p = pb.start();
        //p.info()是Java 9才有的
        ProcessHandle.Info info = p.info();
        System.out.printf("Process ID: %s%n", p.pid());
        System.out.printf("Command name: %s%n", info.command().orElse(na));
        System.out.printf("Command line: %s%n", info.commandLine().orElse(na));
        System.out.printf("Start time: %s%n",info.startInstant().map(i -> i.atZone(ZoneId.systemDefault()).toLocalDateTime().toString()).orElse(na));
        System.out.printf("Arguments: %s%n",info.arguments().map(a -> Stream.of(a).collect(Collectors.joining(" "))) .orElse(na));
        System.out.printf("User: %s%n", info.user().orElse(na));

        // 一般來說，對(duì)于計(jì)算器這樣的獨(dú)立進(jìn)程，不需要讀取其輸出或等待其終止
        // 但對(duì)于良好的編程習(xí)慣，特別是需要確保進(jìn)程資源被正確關(guān)閉時(shí)，可以考慮添加以下代碼
        // process.waitFor(); // 等待進(jìn)程執(zhí)行完畢
        // process.getInputStream().close();
        // process.getOutputStream().close();
        // process.getErrorStream().close();
    }

    /**
     * 在Java 9中，ProcessHandle類提供了操作和查詢本地進(jìn)程中信息的能力
     */
    public static void processHandleTest() {
        // 獲取當(dāng)前進(jìn)程的進(jìn)程ID（PID）
        long currentProcessId = ProcessHandle.current().pid();
        System.out.println("Current Process ID: " + currentProcessId);

        // 獲取當(dāng)前進(jìn)程的子進(jìn)程列表
        ProcessHandle.current().children().forEach(child -> {
            System.out.println("Child Process ID: " + child.pid() + ", Name: " + child.info().command().orElse("<unknown command>"));
        });

        // 獲取當(dāng)前進(jìn)程的父進(jìn)程
        Optional<ProcessHandle> parent = ProcessHandle.current().parent();
        if(parent.isPresent()){
            ProcessHandle processHandle = parent.get();
            System.out.println("Parent Process ID: " + processHandle.pid() + ", Name: " + processHandle.info().command().orElse("<unknown command>"));
        }

        //獲取資源管理器中的所有進(jìn)程并按照可執(zhí)行路徑名稱排序
        ProcessHandle.allProcesses()
                .sorted(Comparator.comparing(x->x.info().command().orElse("")))
                .forEach(processHandle -> System.out.println("processHandle Process ID: " + processHandle.pid() + ", Name: " + processHandle.info().command().orElse("<unknown command>")));
        //關(guān)閉某個(gè)軟件的所有進(jìn)程
       // ProcessHandle.allProcesses().filter(x->x.info().command().orElse("").equals("D:\\Program Files\\Google\\Chrome\\Application\\chrome.exe")).collect(Collectors.toList()).forEach(x->destroyProcessById(x.pid()));

        // 假設(shè)我們有一個(gè)目標(biāo)進(jìn)程的PID
        long targetProcessId = 31384; // 請(qǐng)?zhí)鎿Q為實(shí)際的進(jìn)程ID
        // 嘗試獲取并銷毀目標(biāo)進(jìn)程
        destroyProcessById(targetProcessId);
    }

    /**
     * 銷毀進(jìn)程
     * @param targetProcessId
     */
    private static void destroyProcessById(long targetProcessId) {
        Optional<ProcessHandle> targetProcessOpt = ProcessHandle.of(targetProcessId);
        if (targetProcessOpt.isPresent()) {
            ProcessHandle targetProcess = targetProcessOpt.get();
            targetProcess.destroy(); // 發(fā)送SIGTERM信號(hào)
            targetProcess.onExit().thenRun(() -> {
                System.out.println("目標(biāo)進(jìn)程Id " + targetProcess.pid() + " 已經(jīng)被銷毀");
            });
        } else {
            System.out.println("沒有找到對(duì)應(yīng)的進(jìn)程Id " + targetProcessId);
        }
    }

}

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