url参数和map之间的转换

url参数转换成map

/**
 * 将url参数转换成map
 * @param param aa=11&bb=22&cc=33
 * @return
 */
public static Map<String, Object> getUrlParams(String param) {
    Map<String, Object> map = new HashMap<String, Object>(0);
    if (StringUtils.isBlank(param)) {
        return map;
    }
    String[] params = param.split("&");
    for (int i = 0; i < params.length; i++) {
        String[] p = params[i].split("=", 2);
        if (p.length == 2) {
            map.put(p[0], p[1]);
        }
    }
    return map;
}

map转换成url

/**
 * 将map转换成url
 * @param map
 * @return
 */
public static String getUrlParamsByMap(Map<String, Object> map) {
    if (map == null) {
        return "";
    }
    StringBuffer sb = new StringBuffer();
    for (Map.Entry<String, Object> entry : map.entrySet()) {
        sb.append(entry.getKey() + "=" + entry.getValue());
        sb.append("&");
    }
    String s = sb.toString();
    if (s.endsWith("&")) {
        s = StringUtils.substringBeforeLast(s, "&");
    }
    return s;
}