1.2 spring的helloworld应用

戴着假发的程序员 出品

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[1]准备

创建项目：spring-st

添加依赖：

 1 <dependencies>
 2     <dependency>
 3         <groupId>org.springframework</groupId>
 4         <artifactId>spring-context</artifactId>
 5         <version>5.1.3.RELEASE</version>
 6     </dependency>
 7     <dependency>
 8         <groupId>junit</groupId>
 9         <artifactId>junit</artifactId>
10         <version>4.12</version>
11         <scope>test</scope>
12     </dependency>
13 </dependencies>

添加AccountDAO类：

 1 package com.boxuewa.dk.demo1.dao;
 2 
 3 /**
 4  * @author 戴着假发的程序员
 5  * @description
 6  */
 7 public class AccountDAO {
 8     public int save(String name){
 9         System.out.println("AccountDAO-save->保存账户:"+name);
10         return 1;
11     }
12 }

添加AccountService类：

 1 package com.boxuewa.dk.demo1.service;
 2 
 3 import com.boxuewa.dk.demo1.dao.AccountDAO;
 4 
 5 /**
 6  * @author 戴着假发的程序员
 7  *  
 8  * @description
 9  */
10 public class AccountService {
11     private AccountDAO accountDAO;
12     public void setAccountDAO(AccountDAO accountDAO) {
13         this.accountDAO = accountDAO;
14     }
15     public int save(String name){
16         System.out.println("AccountService-save->保存用户:"+name);
17         return accountDAO.save(name);
18     }
19 }

AccountService中依赖了AccountDAO，提供setAccountDAO方法，spring会通过这个方法注入accountDAO对象。

添加spring配置文件，并且注册AccountService和AccountDAO

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4        xsi:schemaLocation="http://www.springframework.org/schema/beans
 5         http://www.springframework.org/schema/beans/spring-beans.xsd">
 6     <!-- 注册accountDAO -->
 7     <bean id="accountDAO" class="com.boxuewa.dk.demo1.dao.AccountDAO">
 8     </bean>
 9     <!-- 注册accountService -->
10     <bean id="accountService" class="com.boxuewa.dk.demo1.service.AccountService">
11         <!-- 给accountService注入属性accountDAO -->
12         <property name="accountDAO" ref="accountDAO"/>
13     </bean>
14 </beans>

项目整体结构如下：

 

添加测试类,创建spring容器进行测试：

 1 /**
 2  * @author 戴着假发的程序员
 3  *  
 4  * @description
 5  */
 6 public class SpringTest1 {
 7     @Test
 8     public void testSpringHellowrod(){
 9         //创建spring容器
10         ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
11         AccountService bean = ac.getBean(AccountService.class);
12         bean.save("卡卡西");
13     }
14 }

测试结果：

posted @ 2020-10-02 21:34  戴着假发的程序员0-1  阅读(185)  评论(0)  编辑  收藏  举报