学习之spring属性文件注入

package com.my.proper;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

@Component("configInfo")
public class ConfigInfo {
    @Value("${pagesize}")
    private String pagesize;

    @Value("${aaa}")
    private String aaa;

    public String getAaa() {
        return aaa;
    }

    public void setAaa(String aaa) {
        this.aaa = aaa;
    }

    public String getPagesize() {
        return pagesize;
    }

    public void setPagesize(String pagesize) {
        this.pagesize = pagesize;
    }
}

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:util="http://www.springframework.org/schema/util" xmlns:cache="http://www.springframework.org/schema/cache"
    xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
        http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache-4.2.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.2.xsd">
    <context:component-scan base-package="com.my.proper" />
    <context:component-scan base-package="com.my.action" />

    <!-- spring的属性加载器，加载properties文件中的属性 -->
    <bean id="propertyConfigurer"
        class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <list>
                <value>classpath:messages.properties</value>
                <value>classpath:messages2.properties</value>
            </list>
        </property>
        <property name="fileEncoding" value="utf-8" />
    </bean>
</beans>

    public void propertyTest() {
        ConfigInfo config = (ConfigInfo) cx.getBean("configInfo");
        System.out.println(config.getPagesize());
        System.out.println(config.getAaa());
    }