Spring-IOC实现【02-XML配置方式案例】

野性酷女 2022-02-19 05:39 185阅读 0赞

# 综合案例 #

## 1.创建项目 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4NTI2NTcz_size_16_color_FFFFFF_t_70]

## 2.创建dao层 ##

public interface IUserDao { 
    	public String add();
    }

public class UserDaoImpl implements IUserDao { 
    
    	@Override
    	public String add() { 
    		// TODO Auto-generated method stub
    		return "hello ... ";
    	}
    }

## 3.创建service层 ##

public interface IUserService { 
    	public String add();
    }

public class UserServiceImpl implements IUserService { 
    
    	private IUserDao dao; 
    	// 设值注入 必须的方法
    	public void setDao(IUserDao dao) { 
    		this.dao = dao;
    	}
    
    	@Override
    	public String add() { 
    		return dao.add();
    	}
    }

### 4.创建controller层 ###

/** * 控制层 * @author dpb * */
    public class UserController { 
    	
    	private IUserService service;
    	
    	// 设值注入必须的方法
    	public void setService(IUserService service) { 
    		this.service = service;
    	}
    	public String add(){ 
    		return service.add();
    	}
    }

### 5.配置文件 ###

<bean class="com.sxt.dao.impl.UserDaoImpl" id="userDaoImpl"/>
    
    
    <bean class="com.sxt.service.impl.UserServiceImpl" id="userServiceImpl">
    	
    	<property name="dao" ref="userDaoImpl"></property>
    </bean>
    
    
    <bean class="com.sxt.controller.UserController">
    	
    	<property name="service" ref="userServiceImpl"></property>
    </bean>

## 测试 ##

@Test
    public void test2() { 
    	// 获取ApplicationContext对象 加载配置文件 反射+xml解析
    	ApplicationContext ac = new ClassPathXmlApplicationContext("application.xml");
    	UserController bean = ac.getBean(UserController.class);
    	System.out.println(bean.add());
    }

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4NTI2NTcz_size_16_color_FFFFFF_t_70 1]

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4NTI2NTcz_size_16_color_FFFFFF_t_70 1]: /images/20220219/29f4905922c046828fe84ac5c1aeea1b.png