Spring学习笔记1---依赖注入之set注入

参考:https://docs.spring.io/spring/docs/5.2.3.RELEASE/spring-framework-reference/core.html#beans-collection-elements

set注入

依赖:bean对象的创建依赖于容器

注入:bean对象中所有属性,由容器来注入

---

public class Address {
    private String address;

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }
}

package com.qi.pojo;

import java.util.*;

public class Student {
    private String name;
    private Address address;
    private String[] books;
    private List<String> hobbys;
    private Map<String,String> card;
    private Set<String> games;
    private String wife;
    private Properties info;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Address getAddress() {
        return address;
    }

    public void setAddress(Address address) {
        this.address = address;
    }

    public String[] getBooks() {
        return books;
    }

    public void setBooks(String[] books) {
        this.books = books;
    }

    public List<String> getHobbys() {
        return hobbys;
    }

    public void setHobbys(List<String> hobbys) {
        this.hobbys = hobbys;
    }

    public Map<String, String> getCard() {
        return card;
    }

    public void setCard(Map<String, String> card) {
        this.card = card;
    }

    public Set<String> getGames() {
        return games;
    }

    public void setGames(Set<String> games) {
        this.games = games;
    }

    public String getWife() {
        return wife;
    }

    public void setWife(String wife) {
        this.wife = wife;
    }

    public Properties getInfo() {
        return info;
    }

    public void setInfo(Properties info) {
        this.info = info;
    }

    @Override
    public String toString() {
        return "Student{" +
                "name='" + name + '\'' +
                ", address=" + address.toString() +
                ", books=" + Arrays.toString(books) +
                ", hobbys=" + hobbys +
                ", card=" + card +
                ", games=" + games +
                ", wife='" + wife + '\'' +
                ", info=" + info +
                '}';
    }
}

beans.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
        https://www.springframework.org/schema/beans/spring-beans.xsd">

    <bean id="address" class="com.qi.pojo.Address">
        <property name="address" value="西安"/>
    </bean>


    <bean id="student" class="com.qi.pojo.Student">
<!--        第一种, 普通注入,value-->
        <property name="name" value="qiqi"/>
<!--第二种,bean注入.ref-->
        <property name="address" ref="address"/>
<!--      数组注入-->
        <property name="books">
            <array>
                <value>红楼梦</value>
                <value>三国演义</value>
                <value>西游记</value>
            </array>
        </property>
<!--        List-->
        <property name="hobbys">
            <list>
                <value>唱</value>
                <value>跳</value>
                <value>rap</value>
            </list>
        </property>
<!--        Map-->
        <property name="card">
            <map>
                <entry key="身份证" value="1231213131323"/>
                <entry key="银行卡" value="147147147"/>
            </map>
        </property>
<!--        set-->
        <property name="games">
            <set>
                <value>lol</value>
                <value>coc</value>
                <value>dnf</value>
            </set>
        </property>
<!--        null-->
        <property name="wife">
            <null/>
        </property>
        <property name="info">
            <props>
                <prop key="学号">17060212</prop>
                <prop key="性别">男</prop>
                <prop key="年纪">22</prop>
            </props>
        </property>
    </bean>



</beans>

public class MyTest {
    public static void main(String[] args) {
        ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");
        Student student = (Student) context.getBean("student");
        System.out.println(student.toString());
        /**
         * Student{name='qiqi',
         * address=Address{address='西安'},
         * books=[红楼梦, 三国演义, 西游记],
         * hobbys=[唱, 跳, rap],
         * card={身份证=1231213131323, 银行卡=147147147},
         * games=[lol, coc, dnf], wife='null',
         * info={学号=17060212, 性别=男, 年纪=22}}
         */
    }
}