@ImportResource() annotation (injection into spring configuration file)

@ImportResource() annotation (injection into spring configuration file)

• The @ImportResource annotation is used to import Spring configuration files to make the contents of the configuration files take effect; (that is, springmvc.xml and applicationContext.xml written before )

• There is no Spring configuration file in Spring Boot, and the configuration file we wrote ourselves cannot be automatically recognized;

• If you want Spring's configuration file to take effect, load it in; @ImportResource is marked on a configuration class.

• Notice! This annotation is placed on the class of the main entry function, not on the test class

• Without the @ImportResource() annotation, the program cannot load our spring configuration file at all, so we need to load the spring configuration file into the container.

• 

   

• package com.yangzhenxu.firstspringboot;
  ​
  import org.springframework.boot.SpringApplication;
  import org.springframework.boot.autoconfigure.SpringBootApplication;
  import org.springframework.context.annotation.ImportResource;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RestController;
  ​
  @ImportResource(locations = "classpath:applicationContext.xml")
  @SpringBootApplication
  @RestController
  public class FirstSpringbootApplication {
  ​
      public static void main(String[] args) {
          SpringApplication.run(FirstSpringbootApplication.class, args);
      }
  }

• package com.yangzhenxu.firstspringboot;
  ​
  import com.yangzhenxu.firstspringboot.bean.Person;
  import javafx.application.Application;
  import org.junit.jupiter.api.Test;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.boot.test.context.SpringBootTest;
  import org.springframework.context.ApplicationContext;
  ​
  ​
  @SpringBootTest
  class FirstSpringbootApplicationTests {
  ​
  ​
      @Autowired
      ApplicationContext applicationContext;
  ​
      @Test
      void testapplication() {
          Object a = applicationContext.getBean("dog1");
          System.out.println(a);
      }
  }

• <?xml version="1.0" encoding="UTF-8"?>
  <beans xmlns="http://www.springframework.org/schema/beans"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
      <bean id="dog1" class="com.yangzhenxu.firstspringboot.bean.Dog">
          <property name="name" value="zhangxue"/>
          <property name="age" value="27"/>
      </bean>
  ​
  </beans>