Spring中使用 IoC 创建对象—01

1、pom.xml导入context上下文依赖

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>5.2.8.RELEASE</version>
</dependency>

2、创建Student实体类

@Data
@NoArgsConstructor
@AllArgsConstructor
public class Student {
    
    
    private int id;
    private String name;
}

3、在xml文件中配置Bean

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:p="http://www.springframework.org/schema/p"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
                           http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
                           http://www.springframework.org/schema/context
                           http://www.springframework.org/schema/context/spring-context-4.3.xsd">

    <bean id="student" class="com.cl.pojo.Student">
        <property name="id" value="1"></property>
        <property name="name" value="小明"></property>
    </bean>
</beans>

4、通过ApplicationContext对象从IoC容器中获取Bean

public class Test {
    
    
    public static void main(String[] args) {
    
    
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("Spring.xml");
        Student student = (Student) applicationContext.getBean("student");
        System.out.println(student);
    }
}

测试结果：