Java9中操作和查询本地进程信息的示例详解
作者:ljh_learn_from_base
这篇文章主要为大家详细介绍了Java9中操作和查询本地进程信息的相关知识,文中的示例代码讲解详细,感兴趣的小伙伴可以跟随小编一起学习一下
打开某个进程并获取进程信息
/** * 打开某个进程并获取进程信息 * @throws IOException */ public static void startAndGetProcessInfo() throws IOException { //这里可以输入命令 如cmd命令、打开软件命令:这里以打开window系统的计算器为例 //ProcessBuilder是jdk 1.5提供的 ProcessBuilder pb = new ProcessBuilder("calc.exe"); String na = "<not available>"; //开启计算器进程 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)); // 一般来说,对于计算器这样的独立进程,不需要读取其输出或等待其终止 // 但对于良好的编程习惯,特别是需要确保进程资源被正确关闭时,可以考虑添加以下代码 // process.waitFor(); // 等待进程执行完毕 // process.getInputStream().close(); // process.getOutputStream().close(); // process.getErrorStream().close(); }
在Java 9中,ProcessHandle类提供了操作和查询本地进程中信息的能力
public static void processHandleTest() { // 获取当前进程的进程ID(PID) long currentProcessId = ProcessHandle.current().pid(); System.out.println("Current Process ID: " + currentProcessId); // 获取当前进程的子进程列表 ProcessHandle.current().children().forEach(child -> { System.out.println("Child Process ID: " + child.pid() + ", Name: " + child.info().command().orElse("<unknown command>")); }); // 获取当前进程的父进程 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>")); } //获取资源管理器中的所有进程并按照可执行路径名称排序 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>"))); //关闭某个软件的所有进程 // 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())); // 假设我们有一个目标进程的PID // long targetProcessId = 31384; // 请替换为实际的进程ID // 尝试获取并销毁目标进程 // destroyProcessById(targetProcessId); }
销毁进程
/** * 销毁进程 * @param targetProcessId */ private static void destroyProcessById(long targetProcessId) { Optional<ProcessHandle> targetProcessOpt = ProcessHandle.of(targetProcessId); if (targetProcessOpt.isPresent()) { ProcessHandle targetProcess = targetProcessOpt.get(); targetProcess.destroy(); // 发送SIGTERM信号 targetProcess.onExit().thenRun(() -> { System.out.println("目标进程Id " + targetProcess.pid() + " 已经被销毁"); }); } else { System.out.println("没有找到对应的进程Id " + targetProcessId); } }
完整代码
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(); } /** * 打开某个进程并获取进程信息 * @throws IOException */ public static void startAndGetProcessInfo() throws IOException { //这里可以输入命令 如cmd命令、打开软件命令:这里以打开window系统的计算器为例 //ProcessBuilder是jdk 1.5提供的 ProcessBuilder pb = new ProcessBuilder("calc.exe"); String na = "<not available>"; //开启计算器进程 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)); // 一般来说,对于计算器这样的独立进程,不需要读取其输出或等待其终止 // 但对于良好的编程习惯,特别是需要确保进程资源被正确关闭时,可以考虑添加以下代码 // process.waitFor(); // 等待进程执行完毕 // process.getInputStream().close(); // process.getOutputStream().close(); // process.getErrorStream().close(); } /** * 在Java 9中,ProcessHandle类提供了操作和查询本地进程中信息的能力 */ public static void processHandleTest() { // 获取当前进程的进程ID(PID) long currentProcessId = ProcessHandle.current().pid(); System.out.println("Current Process ID: " + currentProcessId); // 获取当前进程的子进程列表 ProcessHandle.current().children().forEach(child -> { System.out.println("Child Process ID: " + child.pid() + ", Name: " + child.info().command().orElse("<unknown command>")); }); // 获取当前进程的父进程 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>")); } //获取资源管理器中的所有进程并按照可执行路径名称排序 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>"))); //关闭某个软件的所有进程 // 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())); // 假设我们有一个目标进程的PID long targetProcessId = 31384; // 请替换为实际的进程ID // 尝试获取并销毁目标进程 destroyProcessById(targetProcessId); } /** * 销毁进程 * @param targetProcessId */ private static void destroyProcessById(long targetProcessId) { Optional<ProcessHandle> targetProcessOpt = ProcessHandle.of(targetProcessId); if (targetProcessOpt.isPresent()) { ProcessHandle targetProcess = targetProcessOpt.get(); targetProcess.destroy(); // 发送SIGTERM信号 targetProcess.onExit().thenRun(() -> { System.out.println("目标进程Id " + targetProcess.pid() + " 已经被销毁"); }); } else { System.out.println("没有找到对应的进程Id " + targetProcessId); } } }
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