Spring集合注入

news2024/12/23 9:01:08

一、环境准备

创建一个Maven项目
pom.xml添加Spring依赖
resources下添加spring的配置文件applicationContext.xml
项目中添加BookDao、BookDaoImpl类

public interface BookDao {
    public void save();
}

public class BookDaoImpl implements BookDao {
   private int[] array;
   private List<String> list;
   private Set<String> set;
   private Map<String,String> map;
   private Properties properties;

   public void setArray(int[] array) {
      this.array = array;
   }

   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;
   }

   public void setProperties(Properties properties) {
      this.properties = properties;
   }
   public void save(){
      System.out.println("book dao save...");
      System.out.println("遍历数组："+ Arrays.toString(array));
      System.out.println("遍历List"+list);
      System.out.println("遍历Set"+set);
      System.out.println("遍历Map"+map);
      System.out.println("遍历Properties"+properties);
   }
}

resources下提供spring配置文件

<?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="bookDao" class="itheima.dao.impl.BookDaoImpl">
</beans>

编写AppForDICollection运行类，加载Spring的IOC容器，并从中获取对应bean对象

public class AppForDICollection {
    public static void main(String[] args) {
        ApplicationContext c= new ClassPathXmlApplicationContext("applicationContext.xml");
        BookDao bookdao= (BookDao) c.getBean("bookDao");
        bookdao.save();
    }
}

二、注入数组类型数据

<property name="array">
            <array>
                <value>100</value>
                <value>200</value>
                <value>300</value>
            </array>
        </property>

三、注入List类型数据

<property name="list">
            <list>
                <value>java</value>
                <value>spring</value>
                <value>mysql</value>
            </list>
        </property>

四、注入Map类型数据

 <property name="map">
            <map>
                <entry key="contry" value="china"/>
                <entry key="provice" value="henan"/>
                <entry key="city" value="zhengzhou"/>
            </map>
        </property>

五、注入Set类型数据

<property name="set">
            <set>
                <value>springboot</value>
                <value>vue</value>
                <value>html</value>
            </set>
        </property>

六、注入Properties类型数据

 <property name="properties">
            <props>
                <prop key="contry">china</prop>
                <prop key="provice">guangdong</prop>
                <prop key="city">guangzhou</prop>
            </props>
        </property>

配置完成后运行AppForCollection程序，运行结果为：
在这里插入图片描述