spring中list,set,map集合的设置以及DI(依赖注入)

spring中list,set,map集合的设置以及DI(依赖注入)

package com.ning.pojo;

import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.Set;

public class People {
    private int id;
    private String name;
    private Set<String> sets;
    private List<String> list;
    private String[] strs;
    private Map<String,String> map;
    private Desk desk;

    @Override
    public String toString() {
        return "People{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", sets=" + sets +
                ", list=" + list +
                ", strs=" + Arrays.toString(strs) +
                ", map=" + map +
                ", desk=" + desk +
                '}';
    }

    public People() {
        System.out.println("执行构造方法");
    }

    public People(int id, String name) {
        this.id = id;
        this.name = name;
        System.out.println("执行有参构造");
    }

    public People(Integer id, String name) {
        this.id = id;
        this.name = name;
        System.out.println("执行有参构造Integer");
    }
    public People( String name,int id) {
        this.id = id;
        this.name = name;
        System.out.println("执行有参构造1111");
    }

    public Desk getDesk() {
        return desk;
    }

    public void setDesk(Desk desk) {
        this.desk = desk;
    }

    public Map<String, String> getMap() {
        return map;
    }

    public void setMap(Map<String, String> map) {
        this.map = map;
    }

    public String[] getStrs() {
        return strs;
    }

    public void setStrs(String[] strs) {
        this.strs = strs;
    }

    public List<String> getList() {
        return list;
    }

    public void setList(List<String> list) {
        this.list = list;
    }

    public Set<String> getSets() {
        return sets;
    }

    public void setSets(Set<String> sets) {
        this.sets = sets;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        System.out.println("执行setid");
        this.id = id;
    }

    public String getName() {
        return name;
    }

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


}

package com.ning.pojo;

public class Desk {
    private int id;
    private double price;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public double getPrice() {
        return price;
    }

    public void setPrice(double price) {
        this.price = price;
    }

    @Override
    public String toString() {
        return "Desk{" +
                "id=" + id +
                ", price=" + price +
                '}';
    }
}

DI(依赖注入)
di和ioc是一样的，当一个类(A)中需要依赖另一个类(B)对象时，把B赋值给A的过程叫做依赖注入

   <?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="peo" class="com.ning.pojo.People">
        <property name="id">
            <value>666</value>
        </property>
        <property name="name">
            <value>张三</value>
        </property>

        <property name="sets">
            <set>
                <value>1</value>
                <value>2</value>
                <value>3</value>
                <value>4</value>
            </set>
        </property>

        <!--<property name="list">-->
            <!--<list>-->
                <!--<value>1</value>-->
                <!--<value>2</value>-->
                <!--<value>3</value>-->
            <!--</list>-->
        <!--</property>-->
        <property name="list" value="1,2,3,4,5"/>

        <!--<property name="strs">-->
            <!--<array>-->
                <!--<value>1</value>-->
                <!--<value>2</value>-->
                <!--<value>3</value>-->
            <!--</array>-->
        <!--</property>-->
        <property name="strs" value="测试1,测试2，测试3"/>

        <property name="map">
            <map>
                <entry key="a" value="b"/>
                <entry key="c" value="d"/>
            </map>
        </property>
        <property name="desk" ref="desk"/>
    </bean>
    <bean id="desk" class="com.ning.pojo.Desk">
        <property name="id" value="1"/>
        <property name="price" value="8"/>
    </bean>
</beans>

测试

package com.ning.test;

import com.ning.pojo.People;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
//如何给bean的属性赋值
//通过构造方法设置值
//设置注入(通过set方法) 属性是基本类型或String
public class Test {
    public static void main(String[] args) {
//        People people = new People();

        //对象是在加载这个配置文件的时候就被创建
        ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
        //getBean里第一个参数是bean标签里的id值，第二个参数是返回值类型 如果没有第二个参数，默认是object
        //getBeanDefinitionNames,spring容器中目前所有管理的所有对象
        People peo = ac.getBean("peo", People.class);
        System.out.println(peo.getList().size());
        System.out.println(peo);

    }
}