使用ProcessBuilder运行同一类的多个进程

Question

我想要一个主类，用户可以在其中定义他们想要启动的Customer类进程的数量。我该如何解决这个问题？下面是我用来运行一次Customer类的代码。

try {       
ProcessBuilder customer = new ProcessBuilder("java.exe","-cp","bin","lab_3.Customer");
Process runCustomer = customer.start();
runCustomer.waitFor();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

Answer 1

方法1，克隆

我不知道这个主意有多好，但是，你可以试着做这样的事情：

ProcessBuilder customer = new ProcessBuilder("java.exe","-cp","bin","lab_3.Customer");
Process runCustomer = customer.clone().start();

.clone((会复制它，然后从中启动进程

ProcessBuilder customer = new ProcessBuilder("java.exe","-cp","bin","lab_3.Customer");
Process runCustomer1 = customer.clone().start();
Process runCustomer2 = customer.clone().start();
Process runCustomer3 = customer.clone().start();
Process runCustomer4 = customer.clone().start();

方法2，参数数组

此外，您可以将参数存储在一个数组中，每次想要启动新的Process时，只需创建一个新的ProcessBuilder实例，如下所示：

String command = "java.exe";
String[] args = new String[]{ "-cp", "bin", "lab_3.Customer" };
for(int i = 0; i < numOfProcesses; i++) {
new ProcessBuilder(command, args).start();
}

像这样，如果您需要存储创建的Processes:

String command = "java.exe";
String[] args = new String[]{ "-cp", "bin", "lab_3.Customer" };
Process[] processes = new Process[numOfProcesses];
for(int i = 0; i < numOfProcesses; i++) {
processes[i] = new ProcessBuilder(command, args).start();
}