Spring学习（三）几种集合属性的注入方式

1、前言

众所周知、java中不只有八大简单类型、还有一些集合类型、本文围绕集合类型的注入做一个总结。

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2、项目骨架

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3、过程

1、创建实体类AllCollectionType

package com.feng.entity;

import java.util.*;

public class AllCollectionType {
    private List<String> listElement;
    private String[] arrayElement;
    private Set<String> setElement;
    private Map<String,String> mapElement;
    private Properties propsElement;

    @Override
    public String toString() {
        return "AllCollectionType{" +
                "listElement=" + listElement +
                ", arrayElement=" + Arrays.toString(arrayElement) +
                ", setElement=" + setElement +
                ", mapElement=" + mapElement +
                ", propsElement=" + propsElement +
                '}';
    }

    public List<String> getListElement() {
        return listElement;
    }

    public void setListElement(List<String> listElement) {
        this.listElement = listElement;
    }

    public String[] getArrayElement() {
        return arrayElement;
    }

    public void setArrayElement(String[] arrayElement) {
        this.arrayElement = arrayElement;
    }

    public Set<String> getSetElement() {
        return setElement;
    }

    public void setSetElement(Set<String> setElement) {
        this.setElement = setElement;
    }

    public Map<String, String> getMapElement() {
        return mapElement;
    }

    public void setMapElement(Map<String, String> mapElement) {
        this.mapElement = mapElement;
    }

    public Properties getPropsElement() {
        return propsElement;
    }

    public void setPropsElement(Properties propsElement) {
        this.propsElement = propsElement;
    }
}

2、配置applicationContext.xml

<?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="collectionDemo" class="com.feng.entity.AllCollectionType">
        <property name="listElement">
            <list>
                <value>足球</value>
                <value>蓝球</value>
                <value>乒乓球</value>
            </list>
        </property>
        <property name="arrayElement">
            <array>
                <value>足球1</value>
                <value>蓝球1</value>
                <value>乒乓球1</value>
            </array>
        </property>
        <property name="setElement">
            <set>
                <value>足球2</value>
                <value>蓝球2</value>
                <value>乒乓球2</value>
            </set>
        </property>
        <property name="mapElement">
            <map>
                <entry>
                    <key>
                        <value>foot3</value>
                    </key>
                    <value>足球3</value>
                </entry>
                <entry>
                    <key>
                        <value>basket3</value>
                    </key>
                    <value>蓝球3</value>
                </entry>
                <entry>
                    <key>
                        <value>pp3</value>
                    </key>
                    <value>乒乓球3</value>
                </entry>
            </map>
        </property>
        <property name="propsElement">
            <props>
                <prop key="foot4">足球4</prop>
                <prop key="basket4">蓝球4</prop>
                <prop key="pp4">乒乓球4</prop>
            </props>
        </property>
    </bean>
</beans>

3、编写测试类

package com.feng.test;

import com.feng.entity.AllCollectionType;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Test {

    public static void collectionDemo() {
        ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
        AllCollectionType type = (AllCollectionType)context.getBean("collectionDemo");
        System.out.println(type);
    }
    public static void main(String[] args) {
        collectionDemo();
    }
}

4、运行结果

4、总结

本文简单讲述了四种集合属性的注入方式、对之前的注入方式进行了一次补充。