1.创建一个项目,导入jar包(ioc)

2.拷贝applicationContext.xml到src下

3.创建一个bean包,类分别是Book和CartItem,分别提供get,set方法,toStrong和有参,无参

4.在applicationContext.xml进行配置bean,然后进行级联属性赋值

5.进行测试

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bean

1 package com.xcz.bean; 2  3 public class Book { 4     private int id; 5     private String name; 6     private int price; 7     public Book() { 8         super(); 9     }10     public Book(int id, String name, int price) {11         super();12         this.id = id;13         this.name = name;14         this.price = price;15     }16     public int getId() {17         return id;18     }19     public void setId(int id) {20         this.id = id;21     }22     public String getName() {23         return name;24     }25     public void setName(String name) {26         this.name = name;27     }28     public int getPrice() {29         return price;30     }31     public void setPrice(int price) {32         this.price = price;33     }34     @Override35     public String toString() {36         return "Book [id=" + id + ", name=" + name + ", price=" + price + "]\n";37     }38     39 }

1 package com.xcz.bean; 2  3 public class CartItem { 4     private Book book; 5     private String count; 6     private double amount; 7      8     public CartItem() { 9         super();10     }11     public CartItem(Book book, String count, double amount) {12         super();13         this.book = book;14         this.count = count;15         this.amount = amount;16     }17     public Book getBook() {18         return book;19     }20     public void setBook(Book book) {21         this.book = book;22     }23     public String getCount() {24         return count;25     }26     public void setCount(String count) {27         this.count = count;28     }29     public double getAmount() {30         return amount;31     }32     public void setAmount(double amount) {33         this.amount = amount;34     }35     @Override36     public String toString() {37         return "CartItem [book=" + book + ", count=" + count + ", amount=" + amount + "]\n";38     }39     40 }

applicationContext.xml

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test

1 package com.xcz.bean.test; 2  3  4 import org.junit.jupiter.api.Test; 5 import org.springframework.context.ApplicationContext; 6 import org.springframework.context.support.ClassPathXmlApplicationContext; 7  8 import com.xcz.bean.CartItem; 9 10 class CarItemTest {11     //创建IOC容器12     ApplicationContext ioc = new ClassPathXmlApplicationContext("applicationContext.xml");13     @Test14     void test1() {15         CartItem cItem = (CartItem) ioc.getBean("carItem");16         System.out.println(cItem);17     }18 }