Runtime.getRuntime().exec("....")
和
ProcessBuilder pb = new ProcessBuilder("java", "-server", "-jar", "yourJar.jar");
Process p = pb.start();
以上两种执行命令的方法创建了一个运行命令的新进程。
有没有办法在同一个过程中执行命令,而无需创建新命令?
答案 0 :(得分:3)
正如@soong评论的那样,您可以手动加载JAR和所需的类,然后通过反射调用main
方法。你可以通过以下方式实现这一目标:
// load your JAR file as a File instance
String myJarPath = "C:\\somefolder\\someOtherFolder\\MyJar.jar";
File myJarFile = new File(myJarPath);
// create a new class loader based on your JAR's URL
URLClassLoader classLoader = new URLClassLoader(new URL[]{myJarFile.toURI().toURL()});
// load the class with the main method
Class<?> classToLoad = classLoader.loadClass("MyClass");
// get the main method
Method method = classToLoad.getMethod("main", String[].class);
// invoke it
String args[] = {"arg1", "arg2"}; // args to pass to the main method, it can be null
method.invoke(null, (Object) args); // first parameter is null because main is static
答案 1 :(得分:0)
也许您可以使用ObjectInputStream将进程读入进程