岳阳网站设计,邳州做网站的公司,保定网站优化,万网免费建企业网站这一章节我们来讨论一下如何通过属性注入Bean#xff1f;这一章节分为两部分#xff0c;第一部分我们通过属性向对象注入值#xff0c;第二部分我们通过属性向对象注入还有一个对象的引用。1.如何通过属性向对象注入值#xff1f;#xff08;1#xff09;domainpackage c… 这一章节我们来讨论一下如何通过属性注入Bean这一章节分为两部分第一部分我们通过属性向对象注入值第二部分我们通过属性向对象注入还有一个对象的引用。1.如何通过属性向对象注入值1domainpackage com.raylee.my_new_spring.my_new_spring.ch01.topic_1_7;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;}
}
这一个领域类我们仅仅须要一个Cake就够了。可是我们在里面会加上名称name和大小size这两个属性然后我们通过Spring来帮我们赋值。2測试类package com.raylee.my_new_spring.my_new_spring.ch01.topic_1_7;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_7/ApplicationContext-test.xml })
public class CakeTest {Autowiredprivate ApplicationContext applicationContext;Testpublic void testChief() {Cake cake applicationContext.getBean(Cake.class);System.out.println(cake.getId());System.out.println(cake.getName());System.out.println(cake.getSize());}
}
没什么特别。仅仅须要get那个Bean出来然后打印一下几个属性就可以。 3配置文件?xml version1.0 encodingUTF-8? beans xmlnshttp://www.springframework.org/schema/beans xmlns:contexthttp://www.springframework.org/schema/context xmlns:xsihttp://www.w3.org/2001/XMLSchema-instance xmlns:txhttp://www.springframework.org/schema/tx xmlns:aophttp://www.springframework.org/schema/aop xsi:schemaLocation http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.1.xsd http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.0.xsd http://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 idcake classcom.raylee.my_new_spring.my_new_spring.ch01.topic_1_7.Cake property namename valueBlueberry Cheesecake / property namesize value7 / /bean /beans 配置文件比較重要我们在Bean里面须要插入property这个标签然后name这个属性须要跟我们的domain类的属性名字一样。注意这里首字母能够不区分大写和小写也就是bean idcakeclasscom.raylee.my_new_spring.my_new_spring.ch01.topic_1_7.Cakeproperty nameName valueBlueberry Cheesecake /property nameSize value7 //bean和bean idcakeclasscom.raylee.my_new_spring.my_new_spring.ch01.topic_1_7.Cakeproperty namename valueBlueberry Cheesecake /property namesize value7 //bean是一样的 可是像以下的全然的大写就会抛异常bean idcakeclasscom.raylee.my_new_spring.my_new_spring.ch01.topic_1_7.Cakeproperty nameNAME valueBlueberry Cheesecake /property nameSIZE value7 //bean 測试输出0Blueberry Cheesecake7.0 总结这一章节主要介绍了如何通过属性向对象注入值还有中间须要注意的大写和小写的问题 文件夹http://blog.csdn.net/raylee2007/article/details/50611627 我的githubhttps://github.com/raylee2015/my_new_spring 转载于:https://www.cnblogs.com/gccbuaa/p/7249788.html
