Spring配置文件中注入复杂类型属性

Posted 2021-01-03 我是小菜啊1

Spring在整合其他框架时在配置文件中可能会涉及到复杂类型属性的注入，以下举例说明：

1.数组类型

2.List集合类型

3.Set集合类型

4.Map集合类型

5.Properties属性类型

直接上代码：

实体类：CollectionBean.java

package com.imooc.ioc.demo5;

import java.util.*;

/**
 * Spring复杂类型的集合注入
 */
public class CollectionBean {
    private String[] arrs;  //数组类型

    private List<String> list; //list类型

    private Set<String> set; //set类型

    private Map<String , Integer> map; //map类型

    private Properties properties; //属性类型

    public String[] getArrs() {
        return arrs;
    }

    public void setArrs(String[] arrs) {
        this.arrs = arrs;
    }

    public List<String> getList() {
        return list;
    }

    public void setList(List<String> list) {
        this.list = list;
    }

    public Set<String> getSet() {
        return set;
    }

    public void setSet(Set<String> set) {
        this.set = set;
    }

    public Map<String, Integer> getMap() {
        return map;
    }

    public void setMap(Map<String, Integer> map) {
        this.map = map;
    }

    public Properties getProperties() {
        return properties;
    }

    public void setProperties(Properties properties) {
        this.properties = properties;
    }

    @Override
    public String toString() {
        return "CollectionBean{" +
                "arrs=" + Arrays.toString(arrs) +
                ", list=" + list +
                ", set=" + set +
                ", map=" + map +
                ", properties=" + properties +
                \'}\';
    }
}

 

配置文件：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="collectionBean" class="com.imooc.ioc.demo5.CollectionBean">
        <!--数组类型注入-->
        <property name="arrs">
            <list>
                <value>111</value>
                <value>222</value>
                <value>333</value>
            </list>
        </property>

        <!--list类型注入-->
        <property name="list">
            <list>
                <value>aaa</value>
                <value>bbb</value>
                <value>ccc</value>
            </list>
        </property>

        <!--set类型注入-->
        <property name="set">
            <set>
                <value>ddd</value>
                <value>eee</value>
                <value>fff</value>
            </set>
        </property>

        <!--map类型注入-->
        <property name="map">
            <map>
                <entry key="aaa" value="111"></entry>
                <entry key="bbb" value="222"></entry>
                <entry key="ccc" value="333"></entry>
            </map>
        </property>

        <!--properties类型注入-->
        <property name="properties">
            <props>
                <prop key="aaa">555</prop>
                <prop key="bbb">666</prop>
                <prop key="ccc">777</prop>
            </props>
        </property>
    </bean>
</beans>

 

测试类：SpringDemo5.java

package com.imooc.ioc.demo5;

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

public class SpringDemo5 {
    @Test
    public void demo1(){
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
        CollectionBean collectionContext = (CollectionBean)applicationContext.getBean("collectionBean");
        System.out.println(collectionContext);
    }

}

测试类输出结果：