Mall project _temp Notepad

1. springboot default application.properties application.yml 
   
   four attributes of injection springboot:
    . 1 , Autowired is injected @
    2 , Constructor injection
    . 3 , a method parameter injection Bean @
    4, using @ConfigurationProperties (prefix = "name prefix method directly on @Bean " ) 
   
   comprising @Controller + @ResponseBody
    . 1 , RestController 
   open SpringBoot autoconfiguration
    2 , EnableAutoConfiguration 
   component scans similar <context: scan-base- component package =" "/> scans the current sub-packet and the packet is located
    . 3 , ComponentScan 
   comprising @EnableAutoConfiguration + ComponentScan + @ @SpringBootConfiguration
    . 4 , SpringBootApplication 
   springboot configuration
    5, SpringBootConfiguration 
   configuration
    . 6 , the Configuration 
   specify a resource file @PropertySource ( "CLASSPATH: the jdbc.properties" )
    . 7 , PropertiesSource 
   return value to the method of injecting spring containers
    . 8 , Bean 
   injection attribute values needed to specify the setter
    . 9 , the Value 
   specified profile @ configuration Properties (prefix = "JDBC" )
    10 , configuration Properties 
   open configuration @EnableConfigurationProperties (JdbcProperties. class )
    . 11, EnableConfigurationProperties

    

2. Tomcat (foreground, background, user management, order management, shopping cart management ...)
    1 , single point of failure (one server hung up, all linked, not all access)
    2 , lower the number of concurrent (can not achieve high concurrency)
    3 code coupling high, convenient optimization (you call me, I call to you,)
    4 , convenient extension (either all extended or not extended) 
   benefits: simple maintenance