Spring-IOC实现[02-XML配置文件方式]

拼搏现实的明天。 2022-02-19 09:25 222阅读 0赞

## XML配置方式 ##

## 属性注入 ##

## 构造注入: 创建有参构造方法,同时必须创建无参构造方法 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMwOTg0NTYx_size_16_color_FFFFFF_t_70]

## applicatio.xml中注入 ##

还可以通过下标定位参数

## 测试结果 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMwOTg0NTYx_size_16_color_FFFFFF_t_70 1]

## 设置注入 ##

## Java对象提供对象的setter方法 ##

> 有参构造不是必须的,但是无参构造方法是必须的!  
> set方法注入就是利用对象属性的set方法给对像赋值,相当于使用无参构造方法创建一个user对象,然后调用对象中的set方法给各个属性赋值

package com.sxt.bean;
    
    public class User {
    	private Integer id;
    	
    	private String name;
    	
    	private Integer age;
    
    	public Integer getId() {
    		return id;
    	}
    
    	@Override
    	public String toString() {
    		return "User [id=" + id + ", name=" + name + ", age=" + age + "]";
    	}
    	
    
    	public User() {
    		super();
    	}
    
    	public void setId(Integer id) {
    		this.id = id;
    	}
    
    	public String getName() {
    		return name;
    	}
    
    	public void setName(String name) {
    		this.name = name;
    	}
    
    	public Integer getAge() {
    		return age;
    	}
    
    	public void setAge(Integer age) {
    		this.age = age;
    	}
    }

## application.xml配置 ##

## 测试 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMwOTg0NTYx_size_16_color_FFFFFF_t_70 2]

## P名称空间注入 ##

> p名称空间注入本质上还是set方法注入,只是写法不同

## application.xml配置 ##

## 测试 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMwOTg0NTYx_size_16_color_FFFFFF_t_70 3]

## 对像,数组,list集合,map和Properties属性注入的XML配置方式 ##

## User类和Cat类 ##

package com.sxt.bean;
    
    import java.util.Arrays;
    import java.util.List;
    import java.util.Map;
    import java.util.Properties;
    
    public class User {
    	private Integer id;
    	
    	private String name;
    	
    	private Integer age;
    
    	private Cat cat;//对象注入
    	
    	private Cat[] cats;//数组注入
    	
    	private List<Cat> stu;//集合注入
    	
    	private Map<String, String> maps;//map注入
    	
    	private Properties prope;//Properties 属性注入
    
    	@Override
    	public String toString() {
    		return "User [id=" + id + ", name=" + name + ", age=" + age + ", cat=" + cat + ", cats=" + Arrays.toString(cats)
    				+ ", stu=" + stu + ", maps=" + maps + ", prope=" + prope + "]";
    	}
    
    	public Integer getId() {
    		return id;
    	}
    
    	public void setId(Integer id) {
    		this.id = id;
    	}
    
    	public String getName() {
    		return name;
    	}
    
    	public void setName(String name) {
    		this.name = name;
    	}
    
    	public Integer getAge() {
    		return age;
    	}
    
    	public void setAge(Integer age) {
    		this.age = age;
    	}
    
    	public Cat getCat() {
    		return cat;
    	}
    
    	public void setCat(Cat cat) {
    		this.cat = cat;
    	}
    
    	public Cat[] getCats() {
    		return cats;
    	}
    
    	public void setCats(Cat[] cats) {
    		this.cats = cats;
    	}
    
    	public List<Cat> getStu() {
    		return stu;
    	}
    
    	public void setStu(List<Cat> stu) {
    		this.stu = stu;
    	}
    
    	public Map<String, String> getMaps() {
    		return maps;
    	}
    
    	public void setMaps(Map<String, String> maps) {
    		this.maps = maps;
    	}
    
    	public Properties getPrope() {
    		return prope;
    	}
    
    	public void setPrope(Properties prope) {
    		this.prope = prope;
    	}
    
    	public User() {
    		super();
    	}
    	
    }

package com.sxt.bean;
    
    public class Cat {
    	private String nick;
    	
    	private String color;
    
    	public String getNick() {
    		return nick;
    	}
    
    	public void setNick(String nick) {
    		this.nick = nick;
    	}
    
    	public String getColor() {
    		return color;
    	}
    
    	public void setColor(String color) {
    		this.color = color;
    	}
    
    }

## application.xml配置 ##

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
    	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
    	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
    
    	
    	<bean class="com.sxt.bean.User">
    		<property name="id" value="10" />
    		<property name="name" value="lisi" />
    		<property name="age" value="20" />
    		
    		<property name="cat">
    			<bean class="com.sxt.bean.Cat">
    				<property name="nick" value="花花" />
    				<property name="color" value="白色" />
    			</bean>
    		</property>
    		
    		<property name="cats">
    			<array>
    				<bean class="com.sxt.bean.Cat">
    					<property name="nick" value="花花1" />
    					<property name="color" value="白色1" />
    				</bean>
    				<bean class="com.sxt.bean.Cat">
    					<property name="nick" value="花花2" />
    					<property name="color" value="白色2" />
    				</bean>
    				<bean class="com.sxt.bean.Cat">
    					<property name="nick" value="花花3" />
    					<property name="color" value="白色3" />
    				</bean>
    			</array>
    		</property>
    		
    		<property name="stu">
    			<list>
    				<bean class="com.sxt.bean.Cat">
    					<property name="nick" value="猫猫" />
    					<property name="color" value="红色1" />
    				</bean>
    				<bean class="com.sxt.bean.Cat">
    					<property name="nick" value="猫猫" />
    					<property name="color" value="红色1" />
    				</bean>
    				<bean class="com.sxt.bean.Cat">
    					<property name="nick" value="猫猫" />
    					<property name="color" value="红色1" />
    				</bean>
    			</list>
    		</property>
    		
    		<property name="maps">
    			<map>
    				<entry key="address" value="深圳" />
    				<entry key="job" value="程序员" />
    			</map>
    		</property>
    		
    		<property name="prope">
    			<props>
    				<prop key="username">admin</prop>
    				<prop key="password">123</prop>
    			</props>
    		</property>
    	</bean>
    </beans>

## 测试 ##

package com.sxt.test;
    
    
    
    import java.util.List;
    import java.util.Map;
    import java.util.Properties;
    import java.util.Set;
    
    import org.junit.Test;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    import com.sxt.bean.Cat;
    import com.sxt.bean.User;
    
    public class UserTest {
    
    	@Test
    	public void test() {
    		ApplicationContext ac = new ClassPathXmlApplicationContext("application.xml");
    		User bean = (User) ac.getBean(User.class);
    		System.out.println(bean);
    		System.out.println("打印数组");
    		Cat[] cats = bean.getCats();
    		for (Cat cat : cats) {
    			System.out.println(cat.getNick()+"+"+cat.getColor());
    		}
    		System.out.println("打印list集合");
    		List<Cat> stu = bean.getStu();
    		for (Cat cat : stu) {
    			System.out.println(cat.getNick()+"+"+cat.getColor());
    		}
    		System.out.println("打印map集合");
    		Map<String, String> maps = bean.getMaps();
    		Set<String> set = maps.keySet();
    		for (String sys : set) {
    			System.out.println(maps.get(sys)+"+"+sys);
    		}
    		System.out.println("打印Properties 属性");
    		Properties prope = bean.getPrope();
    		System.out.println(prope.getProperty("username")+"+"+prope.getProperty("password"));
    	}
    
    }

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMwOTg0NTYx_size_16_color_FFFFFF_t_70 4]

## 创建综合案例 ##

## 引入相关jar包 ##

![在这里插入图片描述][2019041614454211.]

## 1.创建项目dao层,service层,和他们实现类 ##

![在这里插入图片描述][20190416144828723.]

package com.sxt.dao;
    /**
     * dao层代码
     * @author Administrator
     *
     */
    public interface IUserDao {
    	String add(String msg);
    }

package com.sxt.dao.impl;
    
    import com.sxt.dao.IUserDao;
    /**
     * dao层实现类代码
     * @author Administrator
     *
     */
    public class UserDaoImpl implements IUserDao{
    	
    	@Override
    	public String add(String msg) {
    		System.out.println("----->"+msg);
    		return "hello";
    	}
    
    }

package com.sxt.service;
    /**
     * service层代码
     * @author Administrator
     *
     */
    public interface IUserService {
    	String add(String msg);
    }

package com.sxt.service.impl;
    
    import com.sxt.dao.IUserDao;
    import com.sxt.service.IUserService;
    /**
     * service层实现类代码
     * @author Administrator
     *
     */
    public class UserServiceImpl implements IUserService{
    	private IUserDao dao;
    	
    	/**
    	 * 这是设值注入的方法
    	 * @param dao
    	 */
    	public void setDao(IUserDao dao) {
    		this.dao = dao;
    	}
    	@Override
    	public String add(String msg) {
    		return dao.add(msg);
    	}
    
    }

## 2.创建Controller层 ##

package com.sxt.controller;
    
    import com.sxt.service.IUserService;
    /**
     * controller层代码
     * @author Administrator
     *
     */
    public class UserConrtroller {
    	
    	private IUserService userService;
    	/**
    	 * 
    	 * 这是设值注入的方法 
    	 * @param userService
    	 */
    	public void setUserService(IUserService userService) {
    		this.userService = userService;
    	}
    
    	public void add(String msg) {
    		System.out.println("-------"+userService.add(msg));
    	}
    
    }

## 3.在application.xml中注册 ##

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

## 4.测试 ##

public class Test {
    	public static void main(String[] args) {
    		ApplicationContext ac = new ClassPathXmlApplicationContext("application.xml");
    		UserConrtroller bean = ac.getBean(UserConrtroller.class);
    		bean.add("aaa");
    	}
    }

![测试结果][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMwOTg0NTYx_size_16_color_FFFFFF_t_70 5]

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMwOTg0NTYx_size_16_color_FFFFFF_t_70 1]: /images/20220219/f9738e4499fe4e5395049c888be45110.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMwOTg0NTYx_size_16_color_FFFFFF_t_70 2]: /images/20220219/6b0488c97b004a08998f9585ed86bef3.png
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMwOTg0NTYx_size_16_color_FFFFFF_t_70 4]: /images/20220219/198a9cefb63c43c0ac4f34b53219e654.png
[2019041614454211.]: /images/20220219/475f00c7ba3d4995ad408a7402c5808e.png
[20190416144828723.]: /images/20220219/295337e6f913400683eafd8123da8923.png
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