Spring

最新推荐文章于 2025-04-21 12:04:13 发布

原创最新推荐文章于 2025-04-21 12:04:13 发布 · 223 阅读

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本文详细介绍Spring框架的IoC容器使用方法，包括配置文件spring.xml的解析，依赖注入实现，以及通过ClassPathXmlApplicationContext加载配置，获取并使用Bean实例的过程。

1、jar

commons-logging-1.1.3.jar
spring-beans-4.0.0.RELEASE.jar
spring-context-4.0.0.RELEASE.jar
spring-core-4.0.0.RELEASE.jar
spring-expression-4.0.0.RELEASE.jar

2. spring.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" xmlns:mvc="http://www.springframework.org/schema/mvc"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans 
		http://www.springframework.org/schema/beans/spring-beans-3.2.xsd 
		http://www.springframework.org/schema/mvc 
		http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd 
		http://www.springframework.org/schema/context 
		http://www.springframework.org/schema/context/spring-context-3.2.xsd 
		http://www.springframework.org/schema/aop 
		http://www.springframework.org/schema/aop/spring-aop-3.2.xsd 
		http://www.springframework.org/schema/tx 
		http://www.springframework.org/schema/tx/spring-tx-3.2.xsd">
		
		<bean id="studentBean" class="day04.Student">
			<property name="name">
				<value>lucas</value>
			</property>
		</bean>
		
</beans>

3、Student

package day04;

public class Student {
	private String name;

	public String getName() {
		return name;
	}

    //会被Spring自动调用 Ioc  
	public void setName(String name) {
		this.name = name;
	}
	
	public void print() {
		System.out.println("hello" + " : " + name);
	}
}

4.YunxingSpring

package day04;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class YunxingSpring {
	public static void main(String[] args) {
		//解析spring.xml
		ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("spring.xml");
		//从spring.xml中获取Bean   (Student)
		Student student = (Student)context.getBean("studentBean");
//		student.setName("");  被Spring自动执行了
		
		student.print();
		
	}
}