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Spring使用P命名空间实现注入数值信息-----Spring框架

news 2025/8/5 5:39:30

<?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"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"><!--       第一步,在Spring的头部添加p命名空间,这就引入了P命名空间了,可以使用P命名空间了-->
<!--    p冒号加属性值就可以赋值使用了--><bean id="Dog" class="com.powernode.spring6.Bean.Dog" p:age="3" p:name="小花" p:birth-ref="Date"/><bean id="Date" class="java.util.Date"/>
</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"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"><!--       第一步,在Spring的头部添加p命名空间,这就引入了P命名空间了,可以使用P命名空间了-->
<!--    p冒号加属性值就可以赋值使用了--><bean id="Dog" class="com.powernode.spring6.Bean.Dog" p:age="3" p:name="小花" p:birth-ref="Date"/><bean id="Date" class="java.util.Date"/>
</beans>

package com.powernode.spring6.Bean;import java.util.Date;public class Dog
{private String name;private int age;private Date birth;@Overridepublic String toString() {return "Dog{" +"name='" + name + '\'' +", age=" + age +", birth=" + birth +'}';}//p空间注入底层还是set注入,只不过p命名空间注入可以让spring配置变得更简单,一旦set方法不存在就会报错了public void setName(String name) {this.name = name;}public void setAge(int age) {this.age = age;}public void setBirth(Date birth) {this.birth = birth;}
}

package com.powernode.spring6.Bean;import java.util.Date;public class Dog
{private String name;private int age;private Date birth;@Overridepublic String toString() {return "Dog{" +"name='" + name + '\'' +", age=" + age +", birth=" + birth +'}';}//p空间注入底层还是set注入,只不过p命名空间注入可以让spring配置变得更简单,一旦set方法不存在就会报错了public void setName(String name) {this.name = name;}public void setAge(int age) {this.age = age;}public void setBirth(Date birth) {this.birth = birth;}
}

    @Testpublic void TestSpecial(){ApplicationContext applicationContext = new ClassPathXmlApplicationContext("set-di.xml");MathBean MathBean = applicationContext.getBean("MathBean",MathBean.class);System.out.println(MathBean);applicationContext = new ClassPathXmlApplicationContext("Spring-p.xml");System.out.println(applicationContext.getBean("Dog",Dog.class));}

@Test
public void TestSpecial()
{ApplicationContext applicationContext = new ClassPathXmlApplicationContext("set-di.xml");MathBean MathBean = applicationContext.getBean("MathBean",MathBean.class);System.out.println(MathBean);applicationContext = new ClassPathXmlApplicationContext("Spring-p.xml");System.out.println(applicationContext.getBean("Dog",Dog.class));
}

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