从Java代码执行Jar [英] Execute Jar from Java code

问题描述

我有这个代码应该运行一个可执行jar，但每当代码执行时都没有任何反应？

I have this code that is supposed to run a executable jar, but whenever the code is executed nothing happens?

      try {
           proc = Runtime.getRuntime().exec("java -jar C://X-Dock//MP3Player.jar");
      } catch (IOException e1) {
           e1.printStackTrace();
      }

如果我手动运行它，JAR工作正常，但是那行代码只是不起作用。我肯定知道代码被调用了。

The JAR works fine if I run it manually, but that line of code just doesn't work. And I know for sure that the code is called.

推荐答案

如果在版本5之后有一个JRE，java提供了一个流程构建器。所以，尝试这样的事情：

If you has a JRE after version 5, java provides a process builder. So, try something like this:

final ProcessBuilder pBuilder = new ProcessBuilder("/java/path", "-jar", "your_jar.jar");
pBuilder.directory(new File("your/working/directory"));
final Process process = pBuilder.start();

/ java / path是java安装的路径，可以用java代替，如果java是在环境变量中。

"/java/path" is path for java installation, can be replaced by java, if java is in the environment variables.

在 ProcessBuilder 。

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