从头认识Spring-1.10 使用命名空间p来注入属性

这一章节我们来介绍一下使用命名空间p来注入属性。

1.domain

蛋糕类：（不变）

package com.raylee.my_new_spring.my_new_spring.ch01.topic_1_10;public class Cake {private final int id = index++;private static int index = 0;private String name = "";private double size = 0;public String getName() {return name;}public void setName(String name) {this.name = name;}public double getSize() {return size;}public void setSize(double size) {this.size = size;}public int getId() {return id;}@Overridepublic String toString() {return "create the cake,its id:" + id + ", size:" + size + " inch ,name:" + name;}}

厨师类：

注意：配置文件使用命名空间p，不能具有相同属性注入的构造器

package com.raylee.my_new_spring.my_new_spring.ch01.topic_1_10;public class Chief {private static int index = 0;private Cake cake = null;private final int id = index++;private String name = "";//配置文件使用命名空间p，不能有下面的构造器// public Chief(String name, Cake cake) {// this.name = name;// this.cake = cake;// }public Cake getCake() {return cake;}public int getId() {return id;}public String getName() {return name;}public Cake makeOneCake() {return cake;}public void setCake(Cake cake) {this.cake = cake;}public void setName(String name) {this.name = name;}}

2.测试类：（不变）

package com.raylee.my_new_spring.my_new_spring.ch01.topic_1_10;import org.junit.Test;import org.junit.runner.RunWith;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.context.ApplicationContext;import org.springframework.test.context.ContextConfiguration;import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;@RunWith(SpringJUnit4ClassRunner.class)@ContextConfiguration(locations = {"/com/raylee/my_new_spring/my_new_spring/ch01/topic_1_10/ApplicationContext-test.xml" })public class ChiefTest {@Autowiredprivate ApplicationContext applicationContext;@Testpublic void testChief() {Chief chief = applicationContext.getBean(Chief.class);System.out.println("chief name:" + chief.getName());System.out.println(chief.getName() + " make a cake ,cake's name :" + chief.makeOneCake());}}

3.配置文件

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx"xmlns:aop="http://www.springframework.org/schema/aop"xsi:schemaLocation="        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsdhttp://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsdhttp://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.1.xsdhttp://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.0.xsdhttp://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd"><bean id="cake"class="com.raylee.my_new_spring.my_new_spring.ch01.topic_1_10.Cake"p:name="jack's own cake" p:size="7" /><bean id="chief"class="com.raylee.my_new_spring.my_new_spring.ch01.topic_1_10.Chief"p:name="jack" p:cake-ref="cake" /></beans>

有三点需要注意：

（1）p后面的名称首字母不区分大小写

也就是说：

<bean id="chief"class="com.raylee.my_new_spring.my_new_spring.ch01.topic_1_10.Chief"p:name="jack" p:cake-ref="cake" />

和

<bean id="chief"class="com.raylee.my_new_spring.my_new_spring.ch01.topic_1_10.Chief"p:Came="jack" p:Cake-ref="cake" />

功能相同

（2）命名空间p与property属性可以混合使用

也就是说：

<bean id="cake"class="com.raylee.my_new_spring.my_new_spring.ch01.topic_1_10.Cake"p:Name="jack's own cake"><property name="size" value="7"></property></bean>

总结：这一章节我们主要介绍了使用命名空间p来注入属性。

目录：http://blog.csdn.net/raylee2007/article/details/50611627 

 

我的github：https://github.com/raylee2015/my_new_spring