SpringBoot之自定义Banner详解

https://www.bootschool.net/ascii
http://www.network-science.de/ascii/
http://patorjk.com/software/taag/
http://www.degraeve.com/img2txt.php

public static void main(String[] args) {
		SpringApplication springApplication = new SpringApplication(Application.class);
		//开启Banner打印方式(OFF：关闭，CONSOLE：控制台输出，LOG：日志输出)
		springApplication.setBannerMode(Mode.LOG);
		springApplication.run(args);
	}

private Banner printBanner(ConfigurableEnvironment environment) {
       //是否开启Banner模式
        if (this.bannerMode == Mode.OFF) {
            return null;
        } else {
            ResourceLoader resourceLoader = this.resourceLoader != null ? this.resourceLoader : new DefaultResourceLoader((ClassLoader)null);
            SpringApplicationBannerPrinter bannerPrinter = new SpringApplicationBannerPrinter((ResourceLoader)resourceLoader, this.banner);
            return this.bannerMode == Mode.LOG ? bannerPrinter.print(environment, this.mainApplicationClass, logger) : bannerPrinter.print(environment, this.mainApplicationClass, System.out);
        }
    }

Banner print(Environment environment, Class<?> sourceClass, Log logger) {
	   //调用getBanner()方法
        Banner banner = this.getBanner(environment);
        try {
            logger.info(this.createStringFromBanner(banner, environment, sourceClass));
        } catch (UnsupportedEncodingException var6) {
            logger.warn("Failed to create String for banner", var6);
        }
        return new SpringApplicationBannerPrinter.PrintedBanner(banner, sourceClass);
    }

private Banner getBanner(Environment environment) {
    SpringApplicationBannerPrinter.Banners banners = new SpringApplicationBannerPrinter.Banners();
    //先获取image类型的banner
    banners.addIfNotNull(this.getImageBanner(environment));
    //在获取text类型的banner
    banners.addIfNotNull(this.getTextBanner(enviro<strong style="color:transparent">本文来源gao@daima#com搞(%代@#码网@</strong>nment));
    if (banners.hasAtLeastOneBanner()) {
        // 如果至少有一个，则返回
        // Banners 也实现了 Banner 接口，运用了组合模式，实际上可同时打印图片和文本 banner。
        return banners;
    } else {
         // 返回自定义的banner(this.fallbackBanner) 或者 springboot默认的banner(DEFAULT_BANNER)
         // 默认的banner类：SpringBootBanner。
         // 自定义的banner：需要我们仿照SpringBootBanner去自定义一个类
         
         //this.fallbackBanner: 表示自定义的banner，此参数可在springboot启动类的main方法中设置,后续会介绍
         
         //   public static void main(String[] args) {
         //        SpringApplication springApplication = new SpringApplication(Application.class);
         //        springApplication.setBanner(new MyBanner());//自定义的banner
         //        springApplication.run(args);
         //   }
        
          return this.fallbackBanner != null ? this.fallbackBanner : DEFAULT_BANNER;
    }
}