Spring的p标签

看Spring in action的时候看过p标签，可惜这东西不用就忘。

p标签是为了简化setter的注入而引入的。

用法：

p:属性 = "{值}"
p:属性-ref = "{引用bean的id}"

示例Bean：

package o3.bean;

import java.util.Date;

public class Person {
    private String name;
    private int age;
    private Date date;

    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;
    }

    public Date getDate(){
        return date;
    }

    public void setDate(Date date){
        this.date = date;
    }

    @Override public String toString(){
        return "Person{" +
               "name='" + name + '\'' +
               ", age=" + age +
               ", date=" + date +
               '}';
    }
}

XML配置：

<?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:context="http://www.springframework.org/schema/context"
       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
       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">

    <context:component-scan base-package="o3.bean"/>

    <bean id="person" class="o3.bean.Person">
        <property name="name" value="Kute"/>
        <property name="age" value="22"/>
        <property name="date" ref="date"/>
    </bean>
    <bean id="date" class="java.util.Date" autowire="constructor"/>

    <bean id="person2" class="o3.bean.Person" p:name="Bill" p:age="23" p:date-ref="date" />
</beans>

测试代码：

package o3;

import o3.bean.Person;
import org.junit.Before;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class P {
    private ApplicationContext ac;
    @Before
    public void setUp(){
        ac=new ClassPathXmlApplicationContext("classpath:applicationContextPerson.xml");
    }

    @Test
    public void run1(){
        Person person = ac.getBean("person", Person.class);
        Person person2 = ac.getBean("person2", Person.class);
        System.out.println(person);
        System.out.println(person2);
    }

}

测试结果：

Person{name='Kute', age=22, date=Fri May 27 10:13:27 CST 2016}
Person{name='Bill', age=23, date=Fri May 27 10:13:27 CST 2016}