Springboot configuring @PropertySource, @ImportResource, @Bean

First, @PropertySource

@PropertySource: Load the specified configuration file

@PropertySource (value = {"Classpath:person.properties"}) @Component
= "Person")
 Public class Person {
}

Second, @ImportResource: Import the Spring configuration file, let the contents of the configuration file take effect

Spring boot does not have a spring configuration file, and the configuration files we write ourselves are not automatically recognized;
Want spring's configuration file to take effect, load it in, @ImportResource label on a configuration class

@ImportResource (locations = {"Classpath:applicationContext.xml"})
@SpringBootApplication
 Public class Springbootconfigapplication {

     Public Static void Main (string[] args) {
        Springapplication.run (springbootconfigapplication. class , args);
    }
}

Third, Springboot recommend the way to add components to the container, the recommended way to use full annotation

1. Configuration class @configuration------>spring configuration file
2. Add components to the container using @bean

/** * @Configuration: Indicates that the current class is a configuration class; Replace the previous spring configuration file * * Add components with <bean><bean/> tags in the configuration file * */
@Configuration
 Public class Myappconfig {
　　// Add the return value of the method to the container; The default ID of this component in the container is the method name
　　@Bean
　　 Public HelloService HelloService () {
System.out.println ("configuration class @bean adding components to the container ...");
　　　　return New HelloService ();
}
}

Springboot configuration @PropertySource, @ImportResource, @Bean