黑马程序员ssm框架教程学习（Spring-06-bean基础配置）

最新推荐文章于 2025-04-14 17:24:31 发布

原创最新推荐文章于 2025-04-14 17:24:31 发布

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#spring #学习 #java #mybatis #spring boot

本文是关于SSM框架中Spring的bean基础配置教程，详细讲解了从包结构、pom.xml配置到Dao、Service层的实现，包括BookDao接口及其实现类、BookService接口及其实现类的编写，最后展示了主类加载和resource下的applicationContext.xml配置。

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1.bean基础配置

2.代码部分：

2.1包展示

2.2pom.xml配置

<dependencies>
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>5.2.10.RELEASE</version>
  </dependency>
</dependencies>
</project>

2.3 Dao层

BookDao接口

public interface BookDao {

    public void save();
}

BookDaoImpl实现类

import com.it.dao.BookDao;

public class BookDaoImpl implements BookDao {
    public void save() {
        System.out.println("bookDao save ");
    }
}

2.4 Service层

BookService接口

public interface BookService {

    public void save();
}

BookServiceImpl实现类

import com.it.dao.BookDao;
import com.it.service.BookService;

public class BookServiceImpl implements BookService {

    private BookDao bookDao ;



    public void save() {

        System.out.println("service save");
        bookDao.save();
    }

    public void setBookDao(BookDao bookDao) {
        this.bookDao = bookDao;
    }


}

2.5加载主类

package com.it;

import com.it.dao.BookDao;
import com.it.service.BookService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class App {
    public static void main(String[] args) {
        ApplicationContext atc = new ClassPathXmlApplicationContext("applicationContext.xml");

        BookDao bookDao = (BookDao) atc.getBean("bookDao");

        BookService bookService = (BookService) atc.getBean("bookService");

       // bookDao.save();

        bookService.save();


    }
}

2.6 resource下的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.xsd">

    <bean id="bookDao" class="com.it.dao.Impl.BookDaoImpl"></bean>
    <bean id="bookService" class="com.it.service.Impl.BookServiceImpl" scope="singleton">
       <property name="bookDao" ref="bookDao"></property>
    </bean>


</beans>