spring 框架 list、set、map、Properties数组注入

亦凉 2021-05-03 09:27 607阅读 0赞

**关于spring框架中数组的注入**

1、先声明一个java类（）声明list、set、map等属性集合，

````
package com.zxk.entity;

import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;

public class SystemIoc {
    //声明各种数组变量
    private String[] strings;//string类型数组
    private Usb[] usbs;//对象类型数组
    private List lists1;
    private List<Integer> lists2;
    private List<Usb> lists3;
    private Set<Usb> sets;
    private Map<String, Usb> maps;
    private Properties pros;
    public String[] getStrings() {
        return strings;
    }
    public void setStrings(String[] strings) {
        this.strings = strings;
    }
    public Usb[] getUsbs() {
        return usbs;
    }
    public void setUsbs(Usb[] usbs) {
        this.usbs = usbs;
    }
    public List getLists1() {
        return lists1;
    }
    public void setLists1(List lists1) {
        this.lists1 = lists1;
    }
    public List<Integer> getLists2() {
        return lists2;
    }
    public void setLists2(List<Integer> lists2) {
        this.lists2 = lists2;
    }
    public List<Usb> getLists3() {
        return lists3;
    }
    public void setLists3(List<Usb> lists3) {
        this.lists3 = lists3;
    }
    public Set<Usb> getSets() {
        return sets;
    }
    public void setSets(Set<Usb> sets) {
        this.sets = sets;
    }
    public Map<String, Usb> getMaps() {
        return maps;
    }
    public void setMaps(Map<String, Usb> maps) {
        this.maps = maps;
    }
    public Properties getPros() {
        return pros;
    }
    public void setPros(Properties pros) {
        this.pros = pros;
    }

}
````

再编写一个对象类用于注入

````
package com.zxk.entity;
public class Usb{
    private Integer size;

public Integer getSize() {
        return size;
    }
    public void setSize(Integer size) {
        this.size = size;
    }
}
````

2、编写applicationContext.xml配置文件

````
<?xml version="1.0" encoding="UTF-8"?>
<beans>
    <bean id="usb1" class="com.zxk.entity.Usb">
        <property name="size" value="1000"></property>
    </bean>
    <bean id="usb2" class="com.zxk.entity.Usb">
        <property name="size" value="2000"></property>
    </bean>
    <!— 集合注入 —>
    <bean id="systemIoc" class="com.zxk.entity.SystemIoc">
        <!— 基本数据类型的数组注入 —>
        <property name="strings">
            <list>
                <value>zhangsan</value>
                <value>lisi</value>
                <value>wangwu</value>
            </list>
        </property>
        <!— 对象类型的数组注入 —>
        <property name="usbs">
            <list>
                <ref bean="usb1"/>
                <ref bean="usb2"/>
                <bean class="com.zxk.entity.Usb">
                    <property name="size" value="3000"></property>
                </bean>
            </list>
        </property>
        <!— 不带泛型的List集合注入 —>
        <property name="lists1">
            <list>
                <value>zhangsan</value>
                <value>18</value>
                <ref bean="usb1"/>
                <bean class="java.util.Date"></bean>
            </list>
        </property>
        <!— 带基本数据类型泛型的List集合注入 —>
        <property name="lists2">
            <list>
                <value>1</value>
                <value>2</value>
                <value>3</value>
            </list>
        </property>
        <!— 带对象类型泛型的List集合注入 —>
        <property name="lists3">
            <list>
                <ref bean="usb1"/>
                <ref bean="usb1"/>
                <bean class="com.zxk.entity.Usb">
                    <property name="size" value="3000"></property>
                </bean>
            </list>
        </property>
        <!— 带对象类型泛型的Set集合注入 —>
        <property name="sets">
            <set>
                <ref bean="usb1"/>
                <ref bean="usb2"/>
                <bean class="com.zxk.entity.Usb">
                    <property name="size" value="3000"></property>
                </bean>
            </set>
        </property>
        <!— 带对象类型泛型的Map集合注入 —>
        <property name="maps">
            <map>
                <entry key="key1" value-ref="usb1"></entry>
                <entry key="key2" value-ref="usb2"></entry>
                <entry key="key3">
                    <bean class="com.zxk.entity.Usb">
                        <property name="size" value="3000"></property>
                    </bean>
                </entry>
            </map>
        </property>
        <!— Properties集合注入 —>
        <property name="pros">
            <props>
                <prop key="pro1">
                    配置1
                </prop>
                <prop key="pro2">
                    配置2
                </prop>
                <prop key="pro3">
                    配置3
                </prop>
            </props>
        </property>
    </bean>

````

3、编写测试类

````
package com.zxk.test;

import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.zxk.entity.SystemIoc;
import com.zxk.entity.Usb;

public class Test {
    public static void main(String[] args) {
        //读取spring配置文件
        ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml”);
                //获取表示的对象
                SystemIoc systemIoc = (SystemIoc) context.getBean("systemIoc”);
                //输出内容
                System.out.println("————-基本类型数组输出———————");
        String[] strings = systemIoc.getStrings();
        for (String string : strings) {
            System.out.println(string);
        }

System.out.println("————-对象类型数组输出———————");

Usb[] usbs = systemIoc.getUsbs();
        for (Usb usb : usbs) {
            System.out.println(usb.getSize());
        }

System.out.println("————-list无参类型数组输出———————");

List list1 = systemIoc.getLists1();
        System.out.println(list1.get(2));

System.out.println("————-list泛型类型数组输出———————");

List<Integer> list2 = systemIoc.getLists2();
        for (Integer integer : list2) {
            System.out.println(integer);
        }

System.out.println("————-list对象类型数组输出———————");

List<Usb> list3 = systemIoc.getLists3();
        for (Usb usb : list3) {
            System.out.println(usb.getSize());
        }

System.out.println("————-set对象类型数组输出———————");

Set<Usb> sets = systemIoc.getSets();
        for (Usb usb : sets) {
            System.out.println(usb.getSize());
        }

System.out.println("————-Map数组输出———————");

Map<String, Usb> maps = systemIoc.getMaps();
        for (Usb usb : maps.values()) {
            System.out.println(usb.getSize());
        }