Question

我尝试创建一个调用外部程序的应用程序，我必须传递两个参数。它没有给出任何错误。用c ++编写的program.exe拍照并修改了txt文件的内容。 java程序运行但它什么都不做

这是我的示例代码

    String[] params = new String [3];
    params[0] = "C:\\Users\\user\\Desktop\\program.exe";
    params[1] = "C:\\Users\\user\\Desktop\\images.jpg";
    params[2] = "C:\\Users\\user\\Desktop\\images2.txt";
    Runtime.getRuntime().exec(params);

Answer 1

从here

借来这个耻辱

Process process = new ProcessBuilder("C:\\PathToExe\\MyExe.exe","param1","param2").start();
InputStream is = process.getInputStream();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String line;

System.out.printf("Output of running %s is:", Arrays.toString(args));

while ((line = br.readLine()) != null) {
  System.out.println(line);
}

更多信息here

有关如何传递命令here和here

的其他问题

Answer 2

这是不对的。 Here's您应该如何使用Runtime.exec()。您也可以尝试使用更现代的堂兄ProcessBuilder：

Java Runtime.getRuntime().exec() alternatives

Answer 3

import java.io.*;

public class Code {
  public static void main(String[] args) throws Exception {
    ProcessBuilder builder = new ProcessBuilder("ls", "-ltr");
    Process process = builder.start();

    StringBuilder out = new StringBuilder();
    try (BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()))) {
        String line = null;
      while ((line = reader.readLine()) != null) {
        out.append(line);
        out.append("\n");
      }
      System.out.println(out);
    }
  }
}

Try online

在java中执行外部程序

3 个答案: