相信很多java程序员在写代码的时候遇到判断某字符串是否为空的时候会用到StringUtils类中isBlank和isEmpty方法，这两个方法到底有什么区别呢？我们用一段代码来阐述这个区别吧：

     @Test

     public void blankEmpty() {

         String str = " ";

         System.out.println("Is empty ? " + StringUtils.isEmpty(str));

         System.out.println("Is blank ? " + StringUtils.isBlank(str));

     }

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也就是说，isBlank方法会把空格去掉再来判断str的长度是否为0，而isEmpty方法则不会忽略空格，直接计算str的长度，长度大于0则返回false.

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