查看SpringBoot启动过程分析性能问题

1. 启动类配置-BufferingApplicationStartup

@SpringBootApplication
public class SpringBoot01Application {
    public static void main(String[] args) {
        SpringApplication springApplication = new SpringApplication(SpringBoot01Application.class);
        springApplication.setApplicationStartup(new BufferingApplicationStartup(2048));
        springApplication.run(args);
    }
}

2. 兼容处理（Jackson + jdk8）-添加jdk对于jdk8日期序列化的处理 3.1 添加pom依赖

        <dependency>
            <groupId>com.fasterxml.jackson.datatype</groupId>
            <artifactId>jackson-datatype-jsr310</artifactId>
            <version>2.17.1</version>
        </dependency>

3.2 设置ObjectMapper支持jdk8日期格式

ObjectMapper objectMapper = new ObjectMapper();
objectMapper.registerModule(new JavaTimeModule());

3. 打印过程

    @EventListener
    public void onApplicationEvent(ApplicationReadyEvent event) throws JsonProcessingException {
        log.info("在调用任何应用程序和命令行运行器之后:{}",event.getClass().getSimpleName());
        BufferingApplicationStartup bean = applicationContext.getBean(BufferingApplicationStartup.class);
        StartupTimeline bufferedTimeline = bean.getBufferedTimeline();
        ObjectMapper objectMapper = new ObjectMapper();
        objectMapper.registerModule(new JavaTimeModule());
        log.info("启动时间线：{}",objectMapper.writeValueAsString(bufferedTimeline));
    }