Apache Common Lang

Apache Common Lang

maven依赖

<!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-lang3</artifactId>
    <version>3.9</version>
</dependency>

使用

//判断评论内容是否为空或空串
        if (StringUtils.isBlank(commentCreateDTO.getContent())){
            return ResultDTO.errorOf(CustomizeErrorCode.COMMENT_IS_EMPTY);
        }

这用等于

       if (commentCreateDTO.getContent() == null || commentCreateDTO.getContent() == "")