Java、JavaFx判断程序是否已运行

package com.test.util.sys;

import java.io.File;
import java.io.RandomAccessFile;
import java.nio.channels.FileLock;

/**
 * 单个实例程序检测
 * @author luohui
 * @create 2020/8/27
 * @since 1.0.0
 */
public class SingleAppCheckUtil {

	/**
	 * 检测是否有其他实例在运行
	 */
	public static void check() {
		try {
			File file = new File(System.getProperty("java.io.tmpdir") + "singleTest.single");
			if(!file.exists()) {
				file.createNewFile();
			}

			RandomAccessFile accessFile = new RandomAccessFile(file, "rw");
			FileLock lock = accessFile.getChannel().tryLock();
			if(lock == null) {
				System.out.println("程序已运行，退出");
				System.exit(0);
			}
		} catch (Exception e) {
			Tools.saveLog(e);
			System.exit(0);
		}
	}
}




package com.test.main;
import com.test.util.sys.SingleAppCheckUtil;
import javafx.application.Application;
import javafx.stage.Stage;

import java.net.URL;
import java.util.Timer;

/**
 * JavaFx首页启动
 * @author luohui
 * @create 2020/4/13
 * @since 1.0.0
 */
public class Main extends Application {
	public static void main(String[] args) {
		launch(args);
	}

	@Override
	public void init() {
		//检测是否有已运行程序
		SingleAppCheckUtil.check();
	}

	@Override
	public void start(Stage primaryStage) throws Exception {
		//业务逻辑代码
		//...
	}
}






package com.test.main;
/**
 * Java程序首页启动
 * @author luohui
 * @create 2020/4/13
 * @since 1.0.0
 */
public class Main1 {
	public static void main(String[] args) {
		//检测是否有已运行程序
		SingleAppCheckUtil.check();
		//业务逻辑代码
		//...
	}
}