spring02--配置集合属性（xml）

最新推荐文章于 2024-07-29 12:53:48 发布

原创最新推荐文章于 2024-07-29 12:53:48 发布 · 246 阅读

0 ·

CC 4.0 BY-SA版权

spring 专栏收录该内容

26 篇文章

订阅专栏

本文介绍如何在Spring框架中使用XML配置文件为对象的集合属性进行注入，包括List类型的实例化及元素注入，展示了具体的配置代码和类定义。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

举例一个人，他可能有多辆车，这多辆车就是一个集合。这里使用list集合。

//这是Person类
public class Person {
	private String name;
	private String sex;
	private int age;
	private double height;
	private List<Car> cars;
	
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getSex() {
		return sex;
	}
	public void setSex(String sex) {
		this.sex = sex;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	public double getHeight() {
		return height;
	}
	public void setHeight(double height) {
		this.height = height;
	}
	public List<Car> getCars() {
		return cars;
	}
	public void setCars(List<Car> cars) {
		this.cars = cars;
	}
	@Override
	public String toString() {
		return "Person [name=" + name + ", sex=" + sex + ", age=" + age + ", height=" + height + ", cars=" + cars + "]";
	}

//这是Car类
public class Car {
	private String name;
	private double price;
	public void setName(String name) {
		this.name = name;
	}
	public void setPrice(double price) {
		this.price = price;
	}
	@Override
	public String toString() {
		return "Car [name=" + name + ", price=" + price + "]";
	}

通过配置文件进行配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="car" class="cn.com.xiao.Car">
<property name="name" value="大众"></property>
<property name="price" value="2000000.0"></property>
</bean>
	<!-- <bean id="person" class="cn.com.xiao.Person" >
	
		<constructor-arg value="张三" index="0"></constructor-arg>
		<constructor-arg value="男" index="1"></constructor-arg>
		<constructor-arg value="20" index="2"></constructor-arg>
		<constructor-arg value="185" index="3"></constructor-arg>
		<constructor-arg>
		<bean class="cn.com.xiao.Car">
		<property name="name" value="dazhong111"></property>
		<property name="price" value="2000000.0"></property>
		</bean>
		</constructor-arg>
		
	</bean> -->
	<bean id="car1" class="cn.com.xiao.Car">
	<property name="name" value="aodi"></property>
	<property name="price"><value>2000000.0</value></property>
	</bean>
	<bean id="car2" class="cn.com.xiao.Car">
	<property name="name" value="baoma"></property>
	<property name="price" value="5000000"></property>
	</bean>
	<bean id="person" class="cn.com.xiao.Person">
	<property name="name" value="zhangsn"></property>
	<property name="age" value="35"></property>
	<property name="height" value="186"></property>
	<property name="sex" value="男"></property>
<!--配置cars集合，在property下使用list节点，在list节点下注入外部bean，或者定义内部bean-->
	<property name="cars">
	<list>
	<ref bean="car1"/>
	<ref bean="car2"/>
	<bean class="cn.com.xiao.Car">
	<property name="name"><value>jieda</value></property>
	<property name="price" value="4000000"></property>
	</bean>
	</list>
	</property>
	</bean>
</beans>