spring入门-------按名称自动装配

r囧r小猫 2024-02-18 23:07 21阅读 0赞

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1.实体类User.java

package entity;
    
    public class User {
    
    	private String name;
    	private Integer age;
    	private String sex;
    	//setter注入
    	public String getName() {
    		return name;
    	}
    	public void setName(String name) {
    		this.name = name;
    	}
    	public Integer getAge() {
    		return age;
    	}
    	public void setAge(Integer age) {
    		this.age = age;
    	}
    	public String getSex() {
    		return sex;
    	}
    	public void setSex(String sex) {
    		this.sex = sex;
    	}
    	
    }

2.实体类PrintInfo.java

package entity;
    
    public class PrintInfo {
    	//注入User对象
        private User user;
        public User getUser() {
            return user;
        }
        public void setUser(User user) {
            this.user = user;
        }
        //打印的User对象中的属性
        public void PrintUser(){
            System.out.println("PrintInfo打印的User属性");
            System.out.println("----------------------");
            System.out.println("用户姓名--"+user.getName());//输出用户的姓名
            System.out.println("用户年龄--"+user.getAge());//输出用户的年龄
            System.out.println("用户性别--"+user.getSex());//输出用户的性别
        }
    }

3.测试类Test.java

package main;
    
    import org.springframework.beans.factory.BeanFactory;
    import org.springframework.beans.factory.xml.XmlBeanFactory;
    import org.springframework.core.io.ClassPathResource;
    import org.springframework.core.io.Resource;
    
    import entity.PrintInfo;
    
    
    public class Test {
    
    	public static void main(String[] args) {
    		// 导入src下的applicationContext.xml配置文件
    		Resource resource=new ClassPathResource("applicationContext.xml");
    		//读取配置文件
    		BeanFactory factory=new XmlBeanFactory(resource);
    		//获取bean
    		PrintInfo printInfo = (PrintInfo)factory.getBean("printInfo");
    		
    		printInfo.PrintUser();
    	}
    
    }

4.配置文件web.xml

<?xml version="1.0" encoding="UTF-8"?>
    <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
      <display-name>Test820</display-name>
      <welcome-file-list>
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.htm</welcome-file>
        <welcome-file>index.jsp</welcome-file>
        <welcome-file>default.html</welcome-file>
        <welcome-file>default.htm</welcome-file>
        <welcome-file>default.jsp</welcome-file>
      </welcome-file-list>
    </web-app>

5.配置文件applicationContext.xml

<?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-2.5.xsd">
    	 
    	<bean id="user" class="entity.User">
    		<property name="name">
    			<value>小强</value>
    		</property>
    		<property name="age">
    			<value>26</value>
    		</property>
    		<property name="sex">
    			<value>男</value>
    		</property>
    	</bean>
    	
    	<bean autowire="byName" id="printInfo" class="entity.PrintInfo" />
    	
    	
    </beans>

6.运行效果

![70 1][]

[70]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/1e2f5d3eee8745e68ada4022a0f17011.png
[70 1]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/9d657e61d36b405ab7a7f1614dc65f45.png