Java spring does not read properly values from application.properties

Question

I have a really difficult problem with application.properties file because I can not read properly from this file with java spring. The simple source code is given below. Thank you in advance.

application.properties file

message.username=john12345

Messages.java

@Value("${message.username}")
private String username;

It throws a FileNotFoundException and shows that the value is always null .

Answer 1

您应该在Spring上下文中配置property-placeholder ：

<context:property-placeholder location="classpath*:my.properties"/

Answer 2

Your Messages class seems to be a POJO that is not managed by Spring. Only inside instances that are controlled by spring you can read application properties.