SpringBoot四大组件

骑猪看日落 2021-11-11 09:28 338阅读 0赞

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package com.gufang.annotation;
    
    import java.lang.annotation.Documented;
    import java.lang.annotation.ElementType;
    import java.lang.annotation.Retention;
    import java.lang.annotation.RetentionPolicy;
    import java.lang.annotation.Target;
    
    /**
     * Enable Gufang DevTool for spring boot application
     * 
     * @author chen.qixiang
     * @version 1.0.0
     * @since 1.0.0
     */
    @Target({ElementType.TYPE})
    @Retention(RetentionPolicy.RUNTIME)
    @Documented
    public @interface EnableGufangConfiguration {
    
    }

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package com.gufang.boot;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
    import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
    import org.springframework.boot.context.properties.EnableConfigurationProperties;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    
    import com.gufang.annotation.EnableGufangConfiguration;
    
    @Configuration
    @ConditionalOnBean(annotation = EnableGufangConfiguration.class)
    @EnableConfigurationProperties(GufangProperties.class)
    public class GufangConfiguration {
    	  @Autowired
    	  private GufangProperties properties;
    
    	  @Bean
    	  public Object createBean()
    	  {
    		  System.out.println("Gufang="+properties);
    		  return new Object();
    	  }
    }

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package com.gufang.boot.context.event;
    import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
    import org.springframework.boot.context.event.ApplicationEnvironmentPreparedEvent;
    import org.springframework.context.ApplicationListener;
    
    import com.gufang.annotation.EnableGufangConfiguration;
    public class GufangBannerApplicationListener implements 
    	ApplicationListener<ApplicationEnvironmentPreparedEvent>
    {
    	public static String gufangLogo =
    	        "  ###################################################################################### \n" +
                "  ########        #             #                                               ######## \n" +
                "  ########   ########       #########           ### #   #   ####  #####  #####  ######## \n" +
                "  ########      #             #                #    #   #   ##    #      #   #  ######## \n" +
                "  ########    #####          ######            # #  #   #   #  #  #####  #####  ######## \n" +
                "  ########   #   #          #    #               #  #   #    # #  #      # #    ######## \n" +
                "  ########  #####          #    #             # #   # # #   ####  #####  #   #  ######## \n" +
                "  ###################################################################################### \n" +
                "                                                             \n" +
                "\n";
    	public static String LINE_SEPARATOR = System.getProperty("line.separator");
    	@Override
    	public void onApplicationEvent(ApplicationEnvironmentPreparedEvent event) {
    		System.out.println(buildBannerText());
    	}
    	private String buildBannerText() {
    		StringBuilder bannerTextBuilder = new StringBuilder();
    		bannerTextBuilder.append(LINE_SEPARATOR).append(gufangLogo).append(" :: Gufang ::        (v1.0.0)")
    		.append(LINE_SEPARATOR);
    		return bannerTextBuilder.toString();
    	}
    }

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spring.factories

org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
    com.gufang.boot.GufangConfiguration
    
    org.springframework.context.ApplicationListener=\
    com.gufang.boot.context.event.GufangBannerApplicationListener

spring.provides

provides: gufang-spring-boot-starter

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