<properties><maven.compiler.source>8</maven.compiler.source><maven.compiler.target>8</maven.compiler.target><spring-version>4.0.0.RELEASE</spring-version></properties><dependencies><dependency><groupId>org.springframework</groupId><artifactId>spring-beans</artifactId><version>${spring-version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-core</artifactId><version>${spring-version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>${spring-version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-expression</artifactId><version>${spring-version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-beans</artifactId><version>${spring-version}</version></dependency><dependency><groupId>commons-logging</groupId><artifactId>commons-logging</artifactId><version>1.1.3</version></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.12</version><scope>test</scope></dependency></dependencies>

public class Person {private String lastName;private Integer age;private String gender;private String email;//省略有参无参、get/set()、toString()
}

<?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"><!--注册一个Person对象，Spring会自动创建这个Person对象--><!--一个bean标签可以注册一个组件(对象，类)class：写要注册的组件全类名id：这个对象的唯一标识--><bean id="person01" class="com.njf.spring.bean.Person"><!--使用property标签为Person对象的属性赋值name="lastName": 指定属性名value="子龙": 指定属性值--><property name="lastName" value="子龙"></property><property name="age" value="18"></property><property name="email" value="zilong@achang.com"></property><property name="gender" value="男"></property></bean></beans>

   /*** 从容器中拿到这个组件*/@Testpublic void test() {//ApplicationContext：代表ioc容器//ClassPathXmlApplicationContext：当前应用的xml配置文件在ClassPath下//根据Spring的配置文件得到ioc容器对象ApplicationContext ioc = new ClassPathXmlApplicationContext("ioc.xml");//容器帮我们创建好了对象Person person01 = (Person) ioc.getBean("person01");Person person02 = (Person) ioc.getBean("person01");System.out.println("person02 = " + person02);System.out.println(person01 == person02); //true//System.out.println("=============================");//Person person03 = (Person) ioc.getBean("person03");//No bean named 'person02' available}