将字符串转换为可以安全插入URL的内容。

/*来自 
 N o w J a v a . c o m - 时  代  Java*/

//package com.nowjava;


public class Main {

    /** Converts a string into something you can safely insert into a URL. */

    public static String encodeURIcomponent(String s) {

        StringBuilder o = new StringBuilder();

        for (char ch : s.toCharArray()) {

            if (isUnsafe(ch)) {

                o.append('%');

                o.append(toHex(ch / 16));

                o.append(toHex(ch % 16));

            } else

                o.append(ch);

        }

        return o.toString();

    }
    /**
     from
    * nowjava.com - 时  代  Java 
    **/


    private static boolean isUnsafe(char ch) {

        if (ch > 128 || ch < 0)

            return true;

        return " %$&+,/:;=?@<>#%".indexOf(ch) >= 0;

    }


    private