通过实例解析Spring Ioc项目实现过程

    <!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>5.2.7.RELEASE</version>
    </dependency>

package com.aca;

public class Hello {
  private String str;


  public void setStr(String str) {
    this.str = str;
  }

  public String getStr() {
    return str;
  }

  public Hello(String str){
    this.str = str;
  }


  @Override
  public String toString() {
    return "Hello{" +
        "str='" + str + '\'' +
        '}';
  }
}

<?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
    https://www.springframework.org/schema/beans/spring-beans.xsd">

  <bean id="Hello" class="com.aca.Hello">
    <constructor-arg type="java.lang.String" value="fffff"/>
  </bean>

</beans>

<beans>
  <import resource="services.xml"/>
  <import resource="resources/messageSource.xml"/>
  <import resource="/resources/themeSource.xml"/>

  <bean id="bean1" class="..."/>
  <bean id="bean2" class="..."/>
</beans>

   ApplicationContext context = new ClassPathXmlApplicationContext("hbean.xml");

// retrieve configured instance
    Hello hello = context.getBean("Hello", Hello.class);
//    hello.setStr("abc");
    System.out.println(hello);