springboot项目启动后，自动执行需要的初始化操作

 

本篇文章拿springboot启动后，自动打开1个浏览器访问项目的html5页面来演示

介绍2种方法，推荐第2种

第一种 手动给spring加入监听任务，比较麻烦

第1步：先写1个线程类，在springboot启动加载完，自动执行的操作放在里面

package com.sinosoft.speech.util;
import org.springframework.stereotype.Component;
/**
 * 需要执行的操作
 * @author lijunming
 * @date 2018/7/22 下午2:54
 */
@Component
public class StepExecutor implements Runnable {
    @Override
    public void run() {
        startStreamTask();

    }
    /**
     * 项目启动后打开1个页面
     */
    public void startStreamTask() {
        System.out.println("开始启动1个页面");
        try {
            Runtime.getRuntime().exec("cmd   /c   start   http://localhost:8080/index");
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

}

第2步，写1个监听器，监听项目加载完后执行指定操作

package com.sinosoft.speech.util;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationListener;
import org.springframework.context.event.ContextRefreshedEvent;
/**
 * spring boot 容器加载完成后执行
 * @author lijunming
 * @date 2018/7/22 下午3:04
 */
public class ApplicationStartup implements ApplicationListener<ContextRefreshedEvent> {
    @Override
    public void onApplicationEvent(ContextRefreshedEvent event) {
        ApplicationContext ac = event.getApplicationContext();
        StepExecutor StepExecutor = ac.getBean(StepExecutor .class);
        Thread thread = new Thread(StepExecutor);
        thread.start();
    }
}

第3步，给springboot的启动类添加监听任务

package com.sinosoft.speech;
import com.sinosoft.speech.util.ApplicationStartup;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
/**
 * @author lijunming
 * @date 2018/7/22 下午2:40
 */
@SpringBootApplication
public class SpeechApplication {

    public static void main(String[] args) {
        SpringApplication springApplication = new SpringApplication(SpeechApplication .class);
        springApplication.addListeners(new ApplicationStartup());
        springApplication.run(args);
    }
}

第二种 spring容器加载完自动监听

第1步，实现springboot默认的监听接口，该方法在spring容器加载完自动监听

package com.sinosoft.speech.util;

import com.sinosoft.speech.swing.Main;
import org.springframework.boot.CommandLineRunner;
import org.springframework.stereotype.Component;
/**
 * spring boot 容器加载后自动监听
 * @author lijunming
 * @date 2018/7/22 下午2:30
 */
@Component
public class MyCommandRunner implements CommandLineRunner {
    @Override
    public void run(String... args) {
         System.out.println("开始启动1个页面");
        try {
            Runtime.getRuntime().exec("cmd   /c   start   http://localhost:8080/index");
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
}

2.正常启动就行

package com.sinosoft.speech;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
/**
 * @author lijunming
 * @date 2018/7/22 下午2:40
 */
@SpringBootApplication
public class SpeechApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpeechApplication.class, args);
    }
}

配置完后，运行springboot启动类，就会自动打开1个浏览器访问项目的html5页面，效果如下