Spring Configuration Using Java

Copy Demo

pom.xml

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No applicationContext.xml

• Too much XML
• Namespaces helped
• Enter Java Configuration

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@Configuration

• applicationContext replaced by @Configuration
• @Configuration at class level
• Spring Beans defined by @Bean
• @Bean at method level
  

AppConfig Demo

AppConfig.java

Application.java

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Setter Injection

• Simple as a method call
• "Mystery" of injection goes away
• Setter Injection simply calling a setter

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Constructor Injection

• Just like setter injection

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Autowired

• @ComponentScan({"com.pluralsight"})
• @Bean
• Instance Type
  

Autowired Setup Demo

AppConfig.java

Service...java

Repository...java

Application.java

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Summary

• AppConfig
• @Configuration
• @Bean
• Setter and Constructor Injection
• Autowired

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Bean Scopes
https://blog.csdn.net/u012596785/article/details/79860079