无法使用批注从.properties文件中提取值

Question

我想通过.properties文件配置bean字符串字段。但它并不替换值键，这意味着它回显“${value}”字符串。我的代码如下：

public class Main {

    public static void main(String[] args) {
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring-config.xml");
        ValuesContainer valuesContainer = (ValuesContainer) applicationContext.getBean("container");
        System.out.println(valuesContainer.getValue()); //echoes "${value}" instead of Ho-ho-ho!
    }
}

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

package bean;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.PropertySource;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;

@Component("container")
@Scope("singleton")
@PropertySource(value = "classpath:app.properties")
public class ValuesContainer {

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

    public String getValue() {
        return value;
    }
}

value = Ho-ho-ho!

Answer 1

配置中似乎缺少PropertySourcesPlaceHolderConfigureer。

看这个帖子。