在Java程序中执行bat文件

Question

How do I execute a .bat or .exe within my java program that is in a sub-folder within the main folder that holds my java program.

Runtime.getRuntime().exec("cmd /c start example.bat");

The code above works perfectly fine when the .bat is in the same folder as the java program. But if my program's .java and .class files were organized in a package (and the .bat would be in a separate folder), how would I call that bat program?

Answer 1

If the .bat file is in a different folder you should pass its full absolute path to cmd.exe. Also, to get the correct quoting you should use the method that takes an array as argument:

String[] cmd = {"cmd", "/c", "start", path};
Runtime.getRuntime().exec(cmd);

If you know the location of the .bat file relative to your .jar file, you can find it using the properties of the Class object. See for example How to get the path of a running JAR file?

Answer 2

在您的情况下可能不可行，但是如果将批处理文件的位置添加到执行路径中怎么办？

Answer 3

您可以使用example.bat的完整绝对路径或工作目录中的相对路径。