Question

我想在spring启动后执行一个java类（包含我想要执行的java线程）。我的初始代码：

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

以下是我想在开始时执行的代码：

public class SimularProfesor implements Runnable{

    // Class atributes

    // Constructor
    public SimularProfesor() {
        //Initialization of atributes
    }

    @Override
    public void run() {
        while(true) {
            // Do something
        }
    }
}

我该怎么称呼这个帖子？这就是我应该做的：

@SpringBootApplication
public class Application {
     public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
        // Call thread (constructor must be executed too)
     }
}

Answer 1

不要自己乱用线程。 Spring（也是普通的Java）有一个很好的抽象。

首先在配置中创建TaskExecutor类型的bean

@Bean
public TaskExecutor taskExecutor() {
    return new SimpleAsyncTaskExecutor(); // Or use another one of your liking
}

然后创建一个CommandLineRunner（虽然ApplicationListener<ContextRefreshedEvent>也可以），以安排您的任务。

@Bean
public CommandLineRunner schedulingRunner(TaskExecutor executor) {
    return new CommandLineRunner() {
        public void run(String... args) throws Exception {
            executor.execute(new SimularProfesor());
        }
    }
}

你当然也可以在春天管理自己的班级。

这样做的好处是Spring也会为你清理线程，你不必自己考虑它。我在这里使用了CommandLineRunner，因为它将在所有bean初始化bean之后执行。

Answer 2

主类SpringBoot

@SpringBootApplication
@EnableAsync
@Controller
public class ...

类控件示例

import javax.annotation.PostConstruct;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.core.task.TaskExecutor;
import org.springframework.stereotype.Component;

@Component
public class ExecutorBase {

    private static final Logger log = LoggerFactory.getLogger(ExecutorBase.class);

    @Autowired
    private TaskExecutor taskExecutor;
    @Autowired
    private ApplicationContext applicationContext;

    private Boolean debug = true;

    @PostConstruct
    public void atStartup() {
        ClasseTaskRunn classeTaskRunn = applicationContext.getBean(ClasseTaskRunn.class);
        taskExecutor.execute(classeTaskRunn );
        if (debug) {
            log.warn("###### Startup ok");
        }
    }
}

可运行的类任务示例

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;

@Component
@Scope("application")
public class ClasseTaskRunn implements Runnable {

    private static final Logger log = LoggerFactory.getLogger(ClasseTaskRunn.class);

    @Autowired
    ClasseDAO classeDAO;

    @Override
    public void run() {
        longBackgorund();
    }

    protected void longBackgorund() {
        while (test) {
            if (debug) {
                log.warn("###### DEBUG: " ... );
            }

            try {
                Thread.sleep(10000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}

在springboot应用程序启动线程

2 个答案: