(D) the timer configuration

springboot greatly simplifies the configuration of the previous spring timer. Now configure the timer only need two steps:

1, add annotations @EnableScheduling in application startup class 

package com.example.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication
@RestController
@EnableScheduling
public class DemoApplication {

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

    @RequestMapping(value = "/")
    public  String defaultMapping(){
        return "welcome" ;
    }

}

 

2, the configuration of the timer config java class, specify execution frequency and the execution logic

package com.example.demo.javaConfig;

import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.Scheduled;

import java.text.SimpleDateFormat;
import java.util.Date;

@Configuration
public class ScheduleStandTest {

    // expression second month time-day week (available 1-7 weeks, said Sunday the first day is also available in English before 3 SUN)
    @Scheduled(cron = "0 0/1 * * * ?")
    public void doExcute(){

        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
        String nowStr = sdf.format(new Date());
        System.out.println(nowStr);
    }
}

 

Execution results are as follows