Spring p和c标签注入方式

Spring p和c标签注入方式

1.编写实体类

package com.ming04.pojo;


import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class User {
    private int id;
    private String name;
}

2.配置文件（重点）

<?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"
       xmlns:c="http://www.springframework.org/schema/c"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd">



    <!-- p命名空间注入 ，可以直接注入属性的值 ：property -->
    <bean id="user" class="com.ming04.pojo.User" p:name="秦小东" p:id="18"/>

    <!-- c命名空间注入 可以构造器注入属性的值 ：construct-args -->
    <bean id="user2" class="com.qin.pojo.User" c:id="19" c:name="狂神" />

</beans>

3.测试

  @Test
    public void Text(){
       ApplicationContext context = new ClassPathXmlApplicationContext("Beans04.xml");
        User user = (User) context.getBean("user2");
        System.out.println(user);
    }
    ```