Java 解析URL参数

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    public static String getUrlparameter(String url, String name) {
        url += "&";
        String pattern = "(\\?|&){1}#{0,1}" + name + "=[a-zA-Z0-9]*(&{1})";
        Pattern r = Pattern.compile(pattern);
        Matcher matcher = r.matcher(url);
        if (matcher.find()) {
            return matcher.group(0).split("=")[1].replace("&", "");
        } else {
            return null;
        }
    }
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