方式一: 四舍五入 double f = 111231.5585; BigDecimal b = new BigDecimal(f); double f1 = b.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue(); 保留两位小数 --------------------------------------------------------------- 方式二: java.text.De
在java doc里有 String[] java.lang.String.split(String regex) Splits this string around matches of the given regular expression. This method works as if by invoking the two-argument split method with the given expression and a limit argument of zero. Tra
Split is a common function in Java. It split a full string to an array based on delimeter. For example, split "a:b:c" with ":" results in [a, b, c] In some scenario, it's better to keep the delimeter instead of discard it while splitti
java的split()方法用于字符串中根据指定的字符进行分割,得到的是一个字符串数组 public String[] split(String regex) Splits this string around matches of the given regular expression.split() 方法需要的参数不是一个简单的字符,而是正则表达式 当以"."作为分割符时,不能使用s.split(".") ,而要使用s.split("\\."