Spring学习笔记2——创建Product对象，并在其中注入一个Category对象

第一步：创建Product类。在Product类中有对Category对象的set和get方法

 1 package com.spring.cate;
 2 
 3 public class Product {
 4     private int id;
 5     private String name ;
 6 
 7     private Category category;
 8 
 9     public int getId() {
10         return id;
11     }
12 
13     public void setId(int id) {
14         this.id = id;
15     }
16 
17     public String getName() {
18         return name;
19     }
20 
21     public void setName(String name) {
22         this.name = name;
23     }
24 
25     public Category getCategory() {
26         return category;
27     }
28 
29     public void setCategory(Category category) {
30         this.category = category;
31     }
32 }

第二步：在创建Product的时候注入一个Category对象

注意，这里要使用ref来注入另一个对象

 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:aop="http://www.springframework.org/schema/aop"
 5     xmlns:tx="http://www.springframework.org/schema/tx"
 6     xmlns:context="http://www.springframework.org/schema/context"
 7     xsi:schemaLocation="
 8    http://www.springframework.org/schema/beans
 9    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
10    http://www.springframework.org/schema/aop
11    http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
12    http://www.springframework.org/schema/tx
13    http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
14    http://www.springframework.org/schema/context     
15    http://www.springframework.org/schema/context/spring-context-3.0.xsd">
16 
17   <context:annotation-config/>
18     <bean name="category" class="com.spring.cate.Category">
19         <property name="name" value="category 3333" />
20     </bean>
21     <bean name="product" class="com.spring.cate.Product">
22         <property name="name" value="product 3333" />
23         <property name="category" ref="category" />
24     </bean>
25 
26    <!--<context:component-scan base-package="com.spring.cate"/>-->
27 </beans>

第三步：测试

 1 package com.spring.test;
 2 
 3 import org.springframework.context.ApplicationContext;
 4 import org.springframework.context.support.ClassPathXmlApplicationContext;
 5 
 6 import com.spring.cate.Product;
 7 
 8 public class TestSpring {
 9 
10     public static void main(String[] args) {
11         // TODO Auto-generated method stub
12         ApplicationContext context = new ClassPathXmlApplicationContext(new String[] { "applicationContext.xml" });
13         Product p = (Product) context.getBean("product");
14         System.out.println(p.getName());
15         System.out.println(p.getCategory().getName());
16     }
17 
18 }