Spring Boot:理解CommandLineRunner和ApplicationRunner
作者:互联网
1.前言
在实际开发中,有些操作需要在项目启动的时候初始化,例如线程池、提前加载好加密证书等。CommandLineRunner和ApplicationRunner中的run()方法可以实现。
CommandLineRunner和ApplicationRunner的作用基本相同的,区别在于CommandLineRunner接口的run()方法接收String数组作为参数,即是最原始的参数;ApplicationRunner接口的run()方法接收ApplicationArguments对象作为参数,是对原始参数的封装。
如果注入了两个实现CommandLineRunner或ApplicationRunner的Bean,可以在类上用@Order注解按顺序执行
2.配置启动参数
配置启动参数(可选)
3.CommandLineRunner
package cn.duckweed.runner.init;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.CommandLineRunner;
import org.springframework.stereotype.Component;
import java.util.Arrays;
/**
* @Author yyx
* @Date 2021/10/23 18:11
*/
@Component
public class MyCommandLineRunner implements CommandLineRunner {
private static final Logger LOGGER = LoggerFactory.getLogger(MyCommandLineRunner.class);
@Override
public void run(String... args) throws Exception {
LOGGER.info("Application started with arguments:" + Arrays.toString(args));
}
}
4.ApplicationRunner
package cn.duckweed.runner.init;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.ApplicationArguments;
import org.springframework.boot.ApplicationRunner;
import org.springframework.stereotype.Component;
import java.util.Arrays;
/**
* @Author yyx
* @Date 2021/10/23 18:36
*/
@Component
public class MyApplicationRunner implements ApplicationRunner {
private static final Logger LOGGER = LoggerFactory.getLogger(MyApplicationRunner.class);
@Override
public void run(ApplicationArguments args) throws Exception {
LOGGER.info("Application started with arguments:" + Arrays.toString(args.getSourceArgs()));
}
}
标签:CommandLineRunner,run,Spring,Boot,springframework,ApplicationRunner,org,import 来源: https://blog.csdn.net/duckweed_king/article/details/120922445