ProcessBuilder的java设置工作目录不工作

Question

我正在尝试运行一个名为test的文件。pdf，位于C:/Software/使用ProcessBuilder。下面是我的代码

public static void main(String[] args) throws IOException {

         ProcessBuilder pb = new ProcessBuilder("test.pdf");
         pb.directory(new File("C:/Software/"));
         pb.start();

    }

我得到了以下例外

Exception in thread "main" java.io.IOException: Cannot run program "test.pdf" (in directory "C:\Software"): CreateProcess error=2, The system cannot find the file specified
    at java.lang.ProcessBuilder.start(Unknown Source)
    at com.test.Test.main(Test.java:12)
Caused by: java.io.IOException: CreateProcess error=2, The system cannot find the file specified
    at java.lang.ProcessImpl.create(Native Method)
    at java.lang.ProcessImpl.<init>(Unknown Source)
    at java.lang.ProcessImpl.start(Unknown Source)
    ... 2 more

我在stackoverflow中检查了这个How to set working directory with ProcessBuilder线程。但是没有任何运气。有人能帮忙吗？谢谢

Answer 1

使用以下代码：

        String fileToOpen = "test.pdf";
        List<String> command = new ArrayList<String>();
        command.add("rundll32.exe");
        command.add("url.dll,FileProtocolHandler");
        command.add(fileToOpen);

        ProcessBuilder builder = new ProcessBuilder();
        builder.directory(new File("C://Software//"));
        builder.command(command);

        builder.start();

它将打开您的pdf
如果要打开同一目录中的其他文件，只需更改文件名即可