编码转换

/**
     * 将空格转换为%20
     * 
     * @param s
     * @return
     */
    public String delEnt(String s) {
        Pattern pattern = Pattern.compile("s*\\+");
        Matcher matcher = pattern.matcher(s);
        return matcher.replaceAll("%20");
    }

/**
     * 去掉换行符
     * 
     * @param s
     * @return
     */
    public String delEn(String s) {
        Pattern pattern = Pattern.compile("\\s*\n");
        Matcher matcher = pattern.matcher(s);
        return matcher.replaceAll("");
    }

/**
     * 删除rar，srt类型文件
     * 
     * @param s
     * @return
     */
    public String[] removeRAR(String[] s) {
        List<String> lista = new ArrayList<String>();

        for (int i = 0; i < s.length; i++)
            lista.add(s[i]);
        for (int j = 0; j < s.length; j++) {
            if (s[j].indexOf(".rar") != -1 || s[j].indexOf(".srt") != -1) {
                lista.remove(s[j]);

            }

/**
     * 汉字转码
     * 
     * @param str
     * @return
     */
    public String strToUTF(String str) {
        try {
            str = URLEncoder.encode(str, "UTF-8");
        } catch (UnsupportedEncodingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        Log.d(str, "");
        return str;
    }

        }
        final int size = lista.size();
        s = (String[]) lista.toArray(new String[size]);
        return s;
    }