Spring 的复杂类型的属性注入：数组，集合（List，Set，Map）

Spring 的复杂类型的属性注入， 我们在使用Spring框架的时候除了对类进行一般的类型的属性注入， 同时还需要注入一些复杂类型的的注入 例如注入：数组，集合（List，Set，Map）

1、数组属性的注入

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:p="http://www.springframework.org/schema/p" 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"> <!-- Spring的属性注入的方式 --> <!-- Spring数组属性的注入 --> <!-- 注入数组类型 --> <bean id="collectionBean" class="com.itzheng.spring.demo5.CollectionBean"> <!-- 注入数组类型 --> <property name="arrs"> <list> <value>王西</value> <value>赵娜</value> <value>李武</value> </list> </property> </bean> </beans>

设置对应的属性和set方法

package com.itzheng.spring.demo5; import java.util.Arrays; /* * 集合属性的注入： */ public class CollectionBean { private String[] arrs; public void setArrs(String[] arrs) { this.arrs = arrs; } @Override public String toString() { return "CollectionBean [arrs=" + Arrays.toString(arrs) + "]"; } } package com.itzheng.spring.demo5; import org.junit.Test; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; /* * 复杂类型的属性注入 */ public class SpringDemo5 { @Test public void demo1() { ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml"); CollectionBean collectionBean = (CollectionBean) applicationContext.getBean("collectionBean"); System.out.println(collectionBean); } }

2、集合属性的注入

（1） list集合当中放入普通类型的value标签，对象ref

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:p="http://www.springframework.org/schema/p" 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"> <!-- Spring数组属性的注入 --> <!-- 注入数组类型 --> <bean id="collectionBean" class="com.itzheng.spring.demo5.CollectionBean"> <!-- 注入数组类型 --> <property name="arrs"> <list> <value>王西</value> <value>赵娜</value> <value>李武</value> </list> </property> <!-- 注入list集合 --> <property name="list"> <list> <value>张三</value> <value>李四</value> <value>登峰</value> </list> </property> </bean> </beans>

设置对应的属性和set方法

package com.itzheng.spring.demo5; import java.util.Arrays; import java.util.List; /* * 集合属性的注入： */ public class CollectionBean { private String[] arrs; private List<String> list; public void setList(List<String> list) { this.list = list; } public void setArrs(String[] arrs) { this.arrs = arrs; } @Override public String toString() { return "CollectionBean [arrs=" + Arrays.toString(arrs) + ", list=" + list + "]"; } } package com.itzheng.spring.demo5; import org.junit.Test; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; /* * 复杂类型的属性注入 */ public class SpringDemo5 { @Test public void demo1() { ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml"); CollectionBean collectionBean = (CollectionBean) applicationContext.getBean("collectionBean"); System.out.println(collectionBean); } }

（2）Set集合和Map集合

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:p="http://www.springframework.org/schema/p" 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"> <!-- Spring数组属性的注入 --> <!-- 注入数组类型 --> <bean id="collectionBean" class="com.itzheng.spring.demo5.CollectionBean"> <!-- 注入数组类型 --> <property name="arrs"> <list> <value>王西</value> <value>赵娜</value> <value>李武</value> </list> </property> <!-- 注入list集合 --> <property name="list"> <list> <value>张三</value> <value>李四</value> <value>登峰</value> </list> </property> <!-- 注入set集合 --> <property name="set"> <set> <value>aaa</value> <value>bbb</value> <value>ccc</value> <value>ddd</value> </set> </property> <property name="map"> <map> <entry key="111" value="iiii"></entry> <entry key="222" value="zzz"></entry> <entry key="333" value="bbb"></entry> <entry key="444" value="ddd"></entry> </map> </property> </bean> </beans>

设置对应的属性和set方法

package com.itzheng.spring.demo5; import java.util.Arrays; import java.util.List; import java.util.Map; import java.util.Set; /* * 集合属性的注入： */ public class CollectionBean { private String[] arrs; private List<String> list; private Set<String> set; private Map<String, String> map; public void setArrs(String[] arrs) { this.arrs = arrs; } public void setList(List<String> list) { this.list = list; } public void setSet(Set<String> set) { this.set = set; } public void setMap(Map<String, String> map) { this.map = map; } @Override public String toString() { return "CollectionBean [arrs=" + Arrays.toString(arrs) + ", list=" + list + ", set=" + set + ", map=" + map + "]"; } }