给级联属性进行赋值

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     @Override
35     public String toString() {
36         return "Book [id=" + id + ", name=" + name + ", price=" + price + "]\n";
37     }
38     
39 }

Book

 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     @Override
36     public String toString() {
37         return "CartItem [book=" + book + ", count=" + count + ", amount=" + amount + "]\n";
38     }
39     
40 }

CartItem

applicationContext.xml

 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     xmlns:context="http://www.springframework.org/schema/context" 
 5     xmlns:jdbc="http://www.springframework.org/schema/jdbc"  
 6     xmlns:jee="http://www.springframework.org/schema/jee" 
 7     xmlns:tx="http://www.springframework.org/schema/tx"
 8     xmlns:aop="http://www.springframework.org/schema/aop" 
 9     xmlns:mvc="http://www.springframework.org/schema/mvc"
10     xmlns:util="http://www.springframework.org/schema/util"
11     xmlns:jpa="http://www.springframework.org/schema/data/jpa"
12     xsi:schemaLocation="
13         http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
14         http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd
15         http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-4.1.xsd
16         http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.1.xsd
17         http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsd
18         http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd
19         http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
20         http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd
21         http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.1.xsd">
22     <!-- 配置bean -->    
23     <bean id="book" class="com.xcz.bean.Book">
24         <property name="id" value="1"></property>
25         <property name="name" value="红楼梦"></property>
26         <property name="price" value="300"></property>
27     </bean>
28     <!-- 给级联属性赋值 -->
29     <bean id="carItem" class="com.xcz.bean.CartItem">
30         <property name="book" ref="book"></property>
31         <!-- 赋值 -->
32         <property name="book.id" value="2"></property>
33         <property name="book.name" value="Oracle"></property>
34         <property name="count" value="30"></property>
35         <property name="amount" value="10.2"></property>
36     </bean>
37 </beans>

View Code

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     @Test
14     void test1() {
15         CartItem cItem = (CartItem) ioc.getBean("carItem");
16         System.out.println(cItem);
17     }
18 }

View Code