springboot启动时执行特定方法

springboot启动时执行特定方法

1 spring事件机制

package lddxfs.springboot.study.runstarted.component;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.context.event.ApplicationReadyEvent;
import org.springframework.context.event.EventListener;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

@Slf4j
@Component
public class ExampleApplicationListener {
    @Autowired
    private StringRedisTemplate stringRedisTemplate;


    /**
     * spring的事件
     * https://blog.csdn.net/chengqiuming/article/details/83349486
     */
    @EventListener(classes={ApplicationReadyEvent.class})
    public void event(ApplicationReadyEvent event) {
        log.info("ApplicationListener:{}", event);
        LocalDateTime localDateTime = LocalDateTime.now();
        stringRedisTemplate.opsForList().leftPush("key:ApplicationListener", localDateTime.format(DateTimeFormatter.ISO_DATE_TIME));

    }
}

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2 springboot 提供的ApplicationRunner

package lddxfs.springboot.study.runstarted.component;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.ApplicationArguments;
import org.springframework.boot.ApplicationRunner;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
@Slf4j
@Component
public class ExampleApplicationRunner implements ApplicationRunner {
    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @Override
    public void run(ApplicationArguments args) throws Exception {
        log.info("ApplicationRunner");
        LocalDateTime localDateTime = LocalDateTime.now();
        stringRedisTemplate.opsForList().leftPush("key:ApplicationRunner", localDateTime.format(DateTimeFormatter.ISO_DATE_TIME));
    }
}

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3 springboot 提供的CommandLineRunner

package lddxfs.springboot.study.runstarted.component;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

@Slf4j
@Component
public class ExampleCommandLineRunner implements CommandLineRunner {

    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @Override
    public void run(String... args) throws Exception {
        log.info("CommandLineRunner");
        LocalDateTime localDateTime = LocalDateTime.now();
        stringRedisTemplate.opsForList().leftPush("key:CommandLineRunner", localDateTime.format(DateTimeFormatter.ISO_DATE_TIME));

    }
}

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4 @PostConstruct方式

package lddxfs.springboot.study.runstarted.component;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;

import javax.annotation.PostConstruct;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

@Slf4j
@Component
public class ExamplePostConstruct {
    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @PostConstruct
    public void postConstruct() {
        log.info("  @PostConstruct");
        LocalDateTime localDateTime = LocalDateTime.now();
        stringRedisTemplate.opsForList().leftPush("key:PostConstruct", localDateTime.format(DateTimeFormatter.ISO_DATE_TIME));

    }
}

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