安装 exe 后 WMIC Java 命令不工作

Question

一个非常简单的代码运行在调试模式下完美但在安装exe后无法运行，在return中没有给出response/result。甚至没有错误可追踪。

在构建 .exe 并在我的 PC 上安装后，它发生了，非常奇怪。尝试过进程生成器但同样的事情，无论如何 check/trace 它。也许路径？

StringBuilder b = new StringBuilder();
Process p = Runtime.getRuntime().exec("wmic diskdrive get signature");
BufferedReader in = new BufferedReader(new InputStreamReader(p.getInputStream()));
String line = null;
while ((line = in.readLine()) != null) {
  b.append(line);
}

请注意：命令前的 CMD /c return 实际环境中的空响应。

Answer 1

带有参数的内部 windows 命令，例如 "wmic diskdrive ..." 可以通过 将其包装在 cmd window.

中轻松执行

这是运行 wmic 命令的工作代码片段，封装在 cmd window:

导入java.io.*;

public class Wmic { public static void main(String[] args) {

StringBuilder b = new StringBuilder();

try {

    // Initialize a process object to run 
    // wmic command and its parameters
    // inside a cmd window

    Process process = Runtime.getRuntime()
                    .exec("cmd /c C:\Windows\System32\wbem\WMIC.exe diskdrive get signature");

    BufferedReader in = new BufferedReader(new InputStreamReader(process.getInputStream()));
    String line = null;
    while ((line = in.readLine()) != null) {
        b.append(line);
    }

} catch (Exception ex) {
    b.append(ex.toString());
}

System.out.println("Output: \n" + b.toString());
}

}

输出：

>javac Wmic.java

>java Wmic
Output:
Signature

更多信息：

https://mkyong.com/java/how-to-execute-shell-command-from-java/

Answer 2

ProcessBuilder 构造函数接受一个字符串列表。当使用 ProcessBuilder 到运行命令时，我将命令中的所有单词分隔成单独的字符串。

我在单独的线程中读取进程的输出。我总是等待我通过 ProcessBuilder 启动的命令终止。

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.StringWriter;

public class PrcBldTs {

    public static void main(String[] args) {
        ProcessBuilder pb = new ProcessBuilder("wmic","diskdrive","get","signature");
        try {
            Process proc = pb.start();
            StreamGobbler error = new StreamGobbler(proc.getErrorStream());
            StreamGobbler output = new StreamGobbler(proc.getInputStream());
            Thread stdout = new Thread(output);
            Thread stderr = new Thread(error);
            stdout.start();
            stderr.start();
            int result = proc.waitFor();
            stdout.join();
            stderr.join();
            System.out.println("Exit status = " + result);
            if (result != 0) {
                System.out.println(error.getContents());
            }
            else {
                System.out.println(output.getContents());
            }
        }
        catch (IOException | InterruptedException x) {
            x.printStackTrace();
        }
    }
}

class StreamGobbler implements Runnable {
    private BufferedReader reader;
    private StringWriter sw;

    public StreamGobbler(InputStream is) {
        InputStreamReader isr = new InputStreamReader(is);
        reader = new BufferedReader(isr);
        sw = new StringWriter();
    }

    public String getContents() {
        return sw.toString();
    }

    public void run() {
        try {
            String line = reader.readLine();
            while (line != null) {
                sw.append(line);
                sw.append(System.lineSeparator());
                line = reader.readLine();
            }
        }
        catch (IOException xIo) {
            throw new RuntimeException(xIo);
        }
    }
}

运行上面的代码给了我以下输出。

Exit status = 0
Signature   

1145609371

安装 exe 后 WMIC Java 命令不工作

WMIC Java command not working after exe installation

java

wmic