Spring-IoC-DI-基于xml的依赖注入-使用set方法进行注入(案例十二:在集合里面设置对象类型)
本文内容纲要:
- 案例十二:在集合里面设置对象类型- (1)创建对象
- (2)配置bean
- (3)测试
- (4)结果
案例十二:在集合里面设置对象类型
(1)创建对象
public class Student { private String sname;
private List<String> list;
private List<Course> courseList;
public void setSname(String sname) {
this.sname = sname;
}
public void setList(List<String> list) {
this.list = list;
}
public void setCourseList(List<Course> courseList) {
this.courseList = courseList;
}
public void show()
{
System.out.println(sname);
System.out.println(list);
System.out.println(courseList);
}
}
public class Course {
private String cname;
public void setCname(String cname) {
this.cname = cname;
}
@Override
public String toString() {
return "Course{" +
"cname='" + cname + '\'' +
'}';
}
}
(2)配置bean
<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:util="http://www.springframework.org/schema/util"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util.xsd">
<!-- 抽取集合 -->
<util:list id="couserlist">
<value>Java程序设计</value>
<value>移动应用开发</value>
<value>数据库</value>
</util:list>
<bean id="student" class="com.orz.spring.collection.Student">
<property name="sname" value="李华"></property>
<!-- 注入集合属性 -->
<property name="list" ref="couserlist"></property>
<!-- 在集合里面设置对象类型 -->
<property name="courseList">
<list>
<ref bean="course1"></ref>
<ref bean="course2"></ref>
</list>
</property>
</bean>
<bean id="course1" class="com.orz.spring.collection.Course">
<property name="cname" value="Mysql"></property>
</bean>
<bean id="course2" class="com.orz.spring.collection.Course">
<property name="cname" value="SQL"></property>
</bean>
</beans>
(3)测试
package com.orz.spring.collection;import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
/**
* @author orz
* @create 2020-08-14 22:40
*/
public class Test2 {
@Test
public void test1()
{
ApplicationContext context=new ClassPathXmlApplicationContext("bean10.xml");
Student student = context.getBean("student", Student.class);
student.show();
}
}
(4)结果
李华[Java程序设计, 移动应用开发, 数据库]
[Course{cname='Mysql'}, Course{cname='SQL'}]
本文内容总结:案例十二:在集合里面设置对象类型,(1)创建对象,(2)配置bean,(3)测试,(4)结果,
原文链接:https://www.cnblogs.com/orzjiangxiaoyu/p/13506040.html
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