Spring2.5_Reference阅读笔记——001——搭建环境，实现IOC

最新推荐文章于 2025-12-29 13:49:48 发布

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#reference #spring #ioc #string #class #encoding

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本文介绍了一个使用 Spring 框架实现的简单 IoC 容器示例，包括配置 beans.xml 文件来定义 Bean 的实例化方式，创建 User 和 Administrator 类作为 Domain Model，并通过 UserService 和 AdminService 提供业务逻辑服务。最后展示了如何通过 ApplicationContext 接口获取并使用这些服务。

1.加入jar包

文件层次

2.写beans.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="UserService" class="com.ztcontrol.service.UserService">
    <!-- collaborators and configuration for this bean go here -->
  </bean>

  <import resource="adminService.xml"/>
  
</beans>

和一个包含的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="AdminService" class="com.ztcontrol.service.AdminService">
  </bean>
  
</beans>

3.domain model和service层

package com.ztcontrol.model;

public class User {
	private int id;
	private String name;
	private String password;
	
//getters&setters
	
	@Override
	public String toString() {
		return "(User: "+this.getName()+" )";
	}
}

package com.ztcontrol.model;

public class Administrator {
	private int id;
	private String name;
	private String password;
	
	//getters&setters

@Overridepublic String toString() {return "(Administrator: "+this.getName()+" )";}}

package com.ztcontrol.service;

import com.ztcontrol.model.Administrator;

public class AdminService {
	
	public void addUser(Administrator a) {
		System.out.println(a+" added!");
	}
	
}

package com.ztcontrol.service;

import com.ztcontrol.model.User;

public class UserService {
	
	public void addUser(User u) {
		System.out.println(u+" added!");
	}
	
}

4.测试类，从容器中拿出来bean

import org.springframework.beans.factory.BeanFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.ztcontrol.model.Administrator;
import com.ztcontrol.model.User;
import com.ztcontrol.service.AdminService;
import com.ztcontrol.service.UserService;


public class tests {

	public static void main(String [] args) {
		ApplicationContext context = new ClassPathXmlApplicationContext(
				new String[] {"beans.xml"});
		BeanFactory factory = context;
		
		UserService us = (UserService) factory.getBean("UserService");
		User u = new User();
		u.setName("foo");
		us.addUser(u);

		AdminService as = (AdminService) factory.getBean("AdminService");
		Administrator a = new Administrator();
		a.setName("bar");
		as.addUser(a);

	}

}