java.util.properties_Spring4 根据类型自动装配属性类型为java.util.Properties

1.配置文件：

2.相关代码

public class Person{

private Properties props;

@Value("#{propertiesReader[username}")

public void setProps(Properties props) {

this.props = props;

}

//..

}

3.尝试解决的方案：

1.

2、在类中需要注入的属性实现 setter 和 getter 方法。

3、在 setter 方法前，添加 @Value 注解

@Value ("#{propertiesReader[propertiesName]}")

propertiesName 为 properties 文件中的键。这样，在容器启动过程中， Spring 将自动注入值。

4.异常信息(说找到2个.properties 文件)：org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'person4' defined in class path resource [beans.xml]: Unsatisfied dependency expressed through bean property 'props': : No qualifying bean of type [java.util.Properties] is defined: expected single matching bean but found 2: propertiesReader,systemProperties; nested exception is org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type [java.util.Properties] is defined: expected single matching bean but found 2: propertiesReader,systemProperties

5.控制台：

信息: Loading properties file from class path resource [yuan.properties](从类路径资源加载属性文件[yuan.properties])