关于Spring不同类型的注入方式 p-namespace,c-namespace

<?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.hu.pojo.Address">
        <property name="address" value="lalala"/>
    </bean>
    <bean id="student" class="com.hu.pojo.Student">
        <!--注入value-->
        <property name="name" value="pengpeng"/>
        <!--第二种bean注入，ref-->
        <property name="address" ref="address"/>
        <!--String[]数组注入-->
        <property name="book">
            <array>
                <value>红楼梦</value>
                <value>水浒传</value>
            </array>
        </property>
        <!--list注入-->
        <property name="hobbys">
            <list>
                <value>听歌</value>
                <value>make</value>
            </list>
        </property>
        <!--map注入-->
        <property name="card">
            <map>
                <entry key="gender" value="male"/>
            </map>
        </property>
        <!--set注入-->
        <property name="games">
            <set>
                <value>lol</value>
            </set>
        </property>
        <!--空值-->
        <property name="wife" value=""/>
        <!--properties注入-->
        <property name="info">
            <props>
                <prop key="学号">15200000</prop>
                <prop key="专业">CS</prop>
            </props>
        </property>
    </bean>
</beans>

<?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:p="http://www.springframework.org/schema/p" 
       <!--加上这个-->
       xmlns:c="http://www.springframework.org/schema/c"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd">
    <bean id="user" class="com.hu.pojo.User" p:name="鹏鹏"/>
</beans>

xmlns:p="http://www.springframework.org/schema/p"

package com.ysj.study;
@SuppressWarnings("ALL")
public class HelloDemo1 {
    private String name;
    private int age;
    public HelloDemo1(){
        System.out.println("HelloDemo1的 无 参构造");
    }
    public HelloDemo1(String name) {
        System.out.println("HelloDemo1的 有 参构造");
        this.name = name;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
}

xmlns:c="http://www.springframework.org/schema/c"