Spring IOC基于XML的環境搭建

特别說明： spring5版本是用jdk8編寫的，是以要求我們的jdk版本是8及以上。 同時tomcat的版本要求8.5及以上。

一、導入maven依賴

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

二、建立相應的接口和實作類

檔案目錄如下，後面給出相應的代碼

• AccountDaoImpl

package com.dgut.dao.impl;
import com.dgut.dao.IAccountDao;
/**
 * 賬戶的持久層實作類
 */
public class AccountDaoImpl implements IAccountDao {
    public  void saveAccount(){
        System.out.println("儲存了賬戶");
    }
}
           

• IAccountDao

package com.dgut.dao;
/**
 * 賬戶的持久層接口
 */
public interface IAccountDao {
    /**
     * 模拟儲存賬戶
     */
    void saveAccount();
}
           

• IAccountServiceImpl

package com.dgut.service.impl;
import com.dgut.dao.IAccountDao;
import com.dgut.dao.impl.AccountDaoImpl;
import com.dgut.service.IAccountService;
/**
 * 賬戶的業務層實作類
 */
public class AccountServiceImpl implements IAccountService {
    private IAccountDao accountDao = new AccountDaoImpl();
    public void  saveAccount(){
        accountDao.saveAccount();
    }
}
           

• IAccountService

package com.dgut.service;
/**
 * 賬戶業務層的接口
 */
public interface IAccountService {
    /**
     * 模拟儲存賬戶
     */
    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;
/**
 * 模拟一個表現層，用于調用業務層
 */
public class Client {
    /**
     * 擷取ioc核心容器，并根據id擷取對象
     * @param args
     */
    public static void main(String[] args) {
        //1.擷取核心容器對象
        ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");
        //2.根據id擷取bean對象
        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">
<!--把對象的建立交給spring來管理-->
    <bean id="accountService" class="com.dgut.service.impl.AccountServiceImpl"></bean>
    <bean id="accountDao" class="com.dgut.dao.impl.AccountDaoImpl"></bean>
</beans>
           

三、測試

在Client中運作main方法進行測試