[Spring 5.3.0] StringUtils#isEmpty has bean deprecated

[btkatoufm]

Description

Part of #989

Starting with Spring 5.3.0, StringUtils#isEmpty has been deprecated.

• Issues: Deprecate StringUtils.isEmpty(Object) and replace remaining usage (e.g. with ObjectUtils.isEmpty) spring-projects/spring-framework#25945
• Commit: spring-projects/spring-framework@621295d

Possible Solution

Replace.
from org.springframework.util.StringUtils#isEmpty
to org.springframework.util.ObjectUtils#ObjectUtils.isEmpty

Affect versions

• 5.7.0.RELEASE

Issue links

Links to related issues.

• Apply Spring Boot 2.4.0 #989

[yoshikawaa]

https://github.com/spring-projects/spring-framework/blob/5acffaa72da10ba42fe547eeea44d8615cbf99b9/spring-core/src/main/java/org/springframework/util/StringUtils.java#L94-L98

	 * @deprecated as of 5.3, in favor of {@link #hasLength(String)} and
	 * {@link #hasText(String)} (or {@link ObjectUtils#isEmpty(Object)})

You may better to change to !StringUtils#hasLength or !StringUtils#hasText instead of ObjectUtils#isEmpty.
If you use isEmpty without careful consideration, you may not notice the difference between an empty String and an empty String array, for example.

[btkatoufm]

If you use isEmpty without careful consideration, you may not notice the difference between an empty String and an empty String array, for example.

I agree with you.
We want to make sure it's an empty string, so we'll use !StringUtils#hasLength or !StringUtils#hasText.