题解 | #替换空格#

替换空格 java解法-->使用split()解

代码

public class Solution {
    /**
     * 替换字符串中的空格
     * @param s 要替换的字符串
     * @return 返回将空格替换成%20的字符串
     */
    public String replaceSpace (String s) {
        if (" ".equals(s)) return "%20";
        if (s == null || "".equals(s)) return s;
        String res = "";
        boolean tag = true;
        if (s.charAt(s.length()-1) == ' ') {
            s = s + "a";
            tag = false;
        }
        String[] split = s.split(" ");
        for (int i = 0; i < split.length; i++) {
            if (i == split.length - 1) {
                if (tag) res = res + split[i];
                continue;
            }
            res = res + split[i] + "%20";
        }
        return res;
    }
}