p命名空间注入

导入p名称空间

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

 

直接输入p就会有相关的属性弹出

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"

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

       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="user" class="org.example.User"  p:name="张三" p:age="20">
        
    </bean>

</beans>

package org.example;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Test6 {
    public static void main(String[] args) {
        ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");
       User user=(User) context.getBean("user");
        System.out.println(user);
    }
}

    User user=(User) context.getBean("user");

也可以这么写

 User user=context.getBean("user"，User.class);

c命名空间注入

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

需要添加一个有参构造函数

通过构造器注入 

    <bean id="user" class="org.example.User"  c:name="张三" c:age="20">

    </bean>

public class Test6 {
    public static void main(String[] args) {
        ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");
       User user= context.getBean("user",User.class);
        System.out.println(user);
    }
}