Spring中的IOC和DI（“最易懂得Spring学习”）（三）

package com.hxl.pojo;
public class Address {
    private String address;
    public String getAddress() {
        return address;
    }
    public void setAddress(String address) {
        this.address = address;
    }
}

package com.hxl.pojo;
import java.util.*;
public class Student {
    private String name;
    //引用类型，到时候用ref赋值
    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 +
                ", books=" + Arrays.toString(books) +
                ", hobbys=" + hobbys +
                ", card=" + card +
                ", games=" + games +
                ", wife='" + wife + '\'' +
                ", info=" + info +
                '}';
    }
}

<?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">
    <!--第一种：普通值注入：value-->
    <bean id="student" class="com.hxl.pojo.Student">
        <property name="name" value="王木木"/>
    </bean>
</beans>

import com.hxl.pojo.Student;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
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.getName());
    }
}

<?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="address" class="com.hxl.pojo.Address"/>
    <bean id="student" class="com.hxl.pojo.Student">
        <!--第一种：普通值注入：value-->
        <property name="name" value="王木木"/>
        <!--第二种，Bean注入：ref-->
        <property name="address" ref="address"/>
        <!--第三种，数组注入-->
        <property name="books">
            <array>
                <value>红楼梦</value>
                <value>水浒传</value>
            </array>
        </property>
        <!--第四种：List注入-->
        <property name="hobbys">
            <list>
                <value>谈恋爱</value>
                <value>敲代码</value>
            </list>
        </property>
        <!--第五种：Map-->
        <property name="card">
            <map>
                <entry key="身份证" value="1254482515165451X"/>
                <entry key="银行卡" value="1549413214151515485"/>
            </map>
        </property>
        <!--第六种：Set-->
        <property name="games">
            <set>
                <value>LOL</value>
                <value>王者荣耀</value>
            </set>
        </property>
        <!--第七种：NULL-->
        <property name="wife">
            <null/>
        </property>
        <!--第八种：Properties-->
        <property name="info">
            <props>
                <prop key="学号">yj2021</prop>
                <prop key="姓名">王木木</prop>
            </props>
        </property>
    </bean>
</beans>

import com.hxl.pojo.Student;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
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='王木木', address=Address{address='null'}, books=[红楼梦, 水浒传], hobbys=[谈恋爱, 敲代码],
        * card={身份证=1254482515165451X, 银行卡=1549413214151515485}, games=[LOL, 王者荣耀], wife='null',
        *  info={学号=yj2021, 姓名=王木木}}
         * */
    }
}