springboot 字符串判断为空或者非空

引入apache commons-lang包

        <dependency>
            <groupId>commons-langgroupId>
            <artifactId>commons-langartifactId>
            <version>2.5version>
        dependency>

		StringUtils.isBlank(params);//空判断
        StringUtils.isNotBlank(params);//非空判断

isBlank等价于params == null || “”.equals(params) || params.trim() == “”
isNotBlank等价于params!=null && !“”.equals(params) && params.trim() != “”