BookDao接口：
public interface BookDao { public void save(); }
BookDaoImpl实现类，并且有各个集合的set方法
import com.itheima.dao.BookDao; import java.util.*; 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); } }
AppForDICollection运行：
import com.itheima.dao.BookDao; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; public class AppForDICollection { public static void main( String[] args ) { ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml"); BookDao bookDao = (BookDao) ctx.getBean("bookDao"); bookDao.save(); } }
applicationContext.xml配置dao，并且用数组、list集合、set集合、msp集合、properties类进行分别注入。
<bean id="bookDao" class="com.itheima.dao.impl.BookDaoImpl"> <!--数组注入--> <property name="array"> <array> <value>100</value> <value>200</value> <value>300</value> </array> </property> <!--list集合注入--> <property name="list"> <list> <value>itcast</value> <value>itheima</value> <value>boxuegu</value> <value>chuanzhihui</value> </list> </property> <!--set集合注入--> <property name="set"> <set> <value>itcast</value> <value>itheima</value> <value>boxuegu</value> <value>boxuegu</value> </set> </property> <!--map集合注入--> <property name="map"> <map> <entry key="country" value="china"/> <entry key="province" value="henan"/> <entry key="city" value="kaifeng"/> </map> </property> <!--Properties注入--> <property name="properties"> <props> <prop key="country">china</prop> <prop key="province">henan</prop> <prop key="city">kaifeng</prop> </props> </property> </bean>
执行结果：
list和数组能够混用，一般来说标准的写。
