Java String.split 和 StringUtils.split

String[] strs = "".split(",");

String[] strs = "".split(",");

结果是strs.length=1,strs[0]=""

String[] strs = ",".split(",");

String[] strs = ",".split(",");

结果是strs.length=0

String[] strs = ",1,".split(",");

String[] strs = ",1,".split(",");

结果是strs.length=2,strs[0]="",strs[1]="1"

String.split使用起来潜规则比较多，即使自己清楚，别人也未必一眼就看明白。为了不引起误会，建议使用StringUtils.split来替代，它对空字符串""会进行过滤。

String[] strs = StringUtils.split(",1,,2,", ",");

String[] strs = StringUtils.split(",1,,2,", ",");

结果是strs.length=2,strs[0]="1",strs[1]="2"