获取指定url上拼接的指定参数值

示例：String mobileUrl = xxxxxxx&wwid=tuozn;
/**
 * 获取指定url上拼接的指定参数值
 * @param targetParam
 * @param urlString
 * @return
 */
private String getParamValueFromUrl(String targetParam, String urlString) {
    try {
        URL url = new URL(urlString);
        String query = url.getQuery();
        if (query == null) {
            return null;
        }
        String[] pairs = query.split("&");
        Map<String, String> params = new HashMap<>();
        for (String pair : pairs) {
            int idx = pair.indexOf("=");
            params.put(pair.substring(0,  idx), pair.substring(idx  + 1));
        }
        return params.get(targetParam);
    } catch (Exception e) {
        log.error("获取url指定参数值异常", e);
        return null;
    }
}

调用：

String loginName = getParamValueFromUrl("wwid", mobileUrl);

输入：

System.out.println(loginName);// tuozn