Spring IOC基于XML的环境搭建

特别说明： spring5版本是用jdk8编写的，所以要求我们的jdk版本是8及以上。 同时tomcat的版本要求8.5及以上。

一、导入maven依赖

    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.0.2.RELEASE</version>
        </dependency>
    </dependencies>

二、创建相应的接口和实现类

文件目录如下，后面给出相应的代码

• AccountDaoImpl

package com.dgut.dao.impl;
import com.dgut.dao.IAccountDao;
/**
 * 账户的持久层实现类
 */
public class AccountDaoImpl implements IAccountDao {
    public  void saveAccount(){
        System.out.println("保存了账户");
    }
}

• IAccountDao

package com.dgut.dao;
/**
 * 账户的持久层接口
 */
public interface IAccountDao {
    /**
     * 模拟保存账户
     */
    void saveAccount();
}

• IAccountServiceImpl

package com.dgut.service.impl;
import com.dgut.dao.IAccountDao;
import com.dgut.dao.impl.AccountDaoImpl;
import com.dgut.service.IAccountService;
/**
 * 账户的业务层实现类
 */
public class AccountServiceImpl implements IAccountService {
    private IAccountDao accountDao = new AccountDaoImpl();
    public void  saveAccount(){
        accountDao.saveAccount();
    }
}

• IAccountService

package com.dgut.service;
/**
 * 账户业务层的接口
 */
public interface IAccountService {
    /**
     * 模拟保存账户
     */
    void saveAccount();
}

• Client

package com.dgut.ui;
import com.dgut.dao.IAccountDao;
import com.dgut.service.IAccountService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
/**
 * 模拟一个表现层，用于调用业务层
 */
public class Client {
    /**
     * 获取ioc核心容器，并根据id获取对象
     * @param args
     */
    public static void main(String[] args) {
        //1.获取核心容器对象
        ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");
        //2.根据id获取bean对象
        IAccountService accountService = (IAccountService)ac.getBean("accountService");
        IAccountDao accountDao = ac.getBean("accountDao", IAccountDao.class);
        System.out.println(accountDao);
        System.out.println(accountService);
    }
}

• beam.xml

<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">
<!--把对象的创建交给spring来管理-->
    <bean id="accountService" class="com.dgut.service.impl.AccountServiceImpl"></bean>
    <bean id="accountDao" class="com.dgut.dao.impl.AccountDaoImpl"></bean>
</beans>

三、测试

在Client中运行main方法进行测试