[Java知识库]Spring 基于java注解的方式配置Bean

类：Person
    @Component//注解 - 标识为Spring组件（Bean）
    public class Person {
        private String name;
        private int age;

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }

        public int getAge() {
            return age;
        }

        public void setAge(int age) {
            this.age = age;
        }

        @Override
        public String toString() {
            return "Person{" +
                    "name='" + name + '\'' +
                    ", age=" + age +
                    '}';
        }
    }

xml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:aop="http://www.springframework.org/schema/aop"
	       xmlns:tx="http://www.springframework.org/schema/tx"
	       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.xsd
	   http://www.springframework.org/schema/aop
	   http://www.springframework.org/schema/aop/spring-aop.xsd
	   http://www.springframework.org/schema/tx
	   http://www.springframework.org/schema/tx/spring-tx.xsd
	   http://www.springframework.org/schema/context
	   http://www.springframework.org/schema/context/spring-context.xsd">
	
	    <!--扫描-->
	    <context:component-scan base-package="com.demo.po"/>
	</beans>

测试类：Junit4Test - 使用Junit4进行单元测试
	public class Junit4Test {
        private ApplicationContext context = null;

        @Before
        public void before() {
            System.out.println("before");
            //加载容器
            context = new ClassPathXmlApplicationContext("applicationContext_xml.xml");
		}

        @Test
        public void method() {
            //获取对象
            Person person = (Person) context.getBean("person");
			//设置值
			person.setName("王五");
			person.setAge(25);
            //打印
            System.out.println(person);//结果：Person{name='王五', age=25}
        }
	}