关于String的一些工具类

1.将客户端穿过来的字符串转成字符串数组.

例如:将"1,2,3"转成{"1","2","3"}

public static String[] stringToArray(String string) {    if (string.contains(",")) {        String[] stringArray = string.split(",");        String array[] = new String[stringArray.length];        for (int i = 0; i < stringArray.length; i++) {            array[i] = stringArray[i];        }        return array;    } else {        return new String[]{string};    }}

1.将字符串的首字母换成大写.

s.toUpperCase().charAt(0) + s.substring(1, s.length())