在多线程 Java 应用程序中，如何确保所有线程在数据库操作之前完成？

// Create an ExecutorService to manage the thread pool
ExecutorService es = Executors.newCachedThreadPool();

// Launch the individual tasks using execute()
for(int i=0; i<5; i++) {
    es.execute(new Runnable() { /* Your task definition here */ });
}

// Shutdown the ExecutorService to prevent new tasks from being submitted
es.shutdown();

// Wait for the tasks to complete using awaitTermination()
try {
    boolean finished = es.awaitTermination(1, TimeUnit.MINUTES);
    // The tasks have finished or the timeout has been reached
} catch(InterruptedException e) {
    // Handle the interruption scenario
}