本文共 6731 字，大约阅读时间需要 22 分钟。

package com.imooc.ioc.demo4;public class User {    private String name;    private Integer age;    public User(String name,Integer age){        this.name = name;        this.age = age;    }    @Override    public String toString() {        return "User{" +                "name='" + name + '\'' +                ", age=" + age +                '}';    }}

package com.imooc.ioc.demo4;import org.junit.Test;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;public class SpringDemo4 {    @Test    public void demo1(){        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");        User user = (User)applicationContext.getBean("user");        System.out.println(user);    }}

运行结果：User{name='张三', age=23}

Ps：普通的用 value，bean用 ref。

package com.imooc.ioc.demo4;public class Person {    private String name;    private Integer age;    private Cat cat;    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;    }    @Override    public String toString() {        return "Person{" +                "name='" + name + '\'' +                ", age=" + age +                ", cat=" + cat +                '}';    }}

package com.imooc.ioc.demo4;public class Cat {    private String name;    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    @Override    public String toString() {        return "Cat{" +                "name='" + name + '\'' +                '}';    }}

package com.imooc.ioc.demo4;import org.junit.Test;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;public class SpringDemo4 {    @Test    public void demo2(){        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");        Person person = (Person)applicationContext.getBean("person");        System.out.println(person);    }}

运行结果：Person{name='李四', age=32, cat=Cat{name='ketty'}}

运行结果：Person{name='大黄', age=34, cat=Cat{name='小黄'}}

的

package com.imooc.ioc.demo4;public class Category {    private String name;    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    @Override    public String toString() {        return "Category{" +                "name='" + name + '\'' +                '}';    }}

package com.imooc.ioc.demo4;public class Product {    private String name;    private Double price;    private Category category;    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public Double getPrice() {        return price;    }    public void setPrice(Double price) {        this.price = price;    }    public Category getCategory() {        return category;    }    public void setCategory(Category category) {        this.category = category;    }    @Override    public String toString() {        return "Product{" +                "name='" + name + '\'' +                ", price=" + price +                ", category=" + category +                '}';    }}

package com.imooc.ioc.demo4;public class ProductInfo {    public Double calculatePrice(){        return Math.random() * 199;    }}

package com.imooc.ioc.demo4;import org.junit.Test;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;public class SpringDemo4 {    @Test    public void demo3(){        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");        Product product = (Product)applicationContext.getBean("product");        System.out.println(product);    }}

运行结果：Product{name='男装', price=155.43113186211818, category=Category{name='服装'}}

package com.imooc.ioc.demo5;import java.util.*;public class CollectionBean {    private String[] arrs; // 数组类型    private List
   
     list; // List集合类型    private Set
    
      set; // Set集合类型    private Map
     
       map; // Map集合类型    private Properties properties; // 属性类型    public String[] getArrs() {        return arrs;    }    public void setArrs(String[] arrs) {        this.arrs = arrs;    }    public List
      
        getList() {        return list;    }    public void setList(List
       
         list) {        this.list = list;    }    public Set
        
          getSet() { return set; } public void setSet(Set
         
           set) { this.set = set; } public Map
          
            getMap() { return map; } public void setMap(Map
           
             map) { this.map = map; } public Properties getProperties() { return properties; } public void setProperties(Properties properties) { this.properties = properties; } @Override public String toString() { return "CollectionBean{" + "arrs=" + Arrays.toString(arrs) + ", list=" + list + ", set=" + set + ", map=" + map + ", properties=" + properties + '}'; }}
           
          
         
        
       
      
     
    
   

   
       
        
            
                 
      
       aaa
                  
      
       bbb
                  
      
       ccc
              
         
        
        
            
                 
      
       111
                  
      
       222
                  
      
       333
              
         
        
        
            
                 
      
       ddd
                  
      
       eee
                  
      
       fff
              
         
        
        
            
         
        
        
            
                 
      
       root
                  
      
       1234
              
         
    
   

package com.imooc.ioc.demo5;import org.junit.Test;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;public class SpringDemo5 {    @Test    public void demo1(){       ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");       CollectionBean collectionBean = (CollectionBean)applicationContext.getBean("collectionBean");       System.out.println(collectionBean);    }}

运行结果：CollectionBean{arrs=[aaa, bbb, ccc], list=[111, 222, 333], set=[ddd, eee, fff], map={aaa=111, bbb=222, ccc=333}, properties={password=1234, username=root}}

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