Asp.net/java 的 [字符串Url] 参数处理

先看一个msdn Uri类:Uri类 和本篇文章没关系,只是为了方便查询

/// <summary>
/// 获取一个url中字符串中？后面的值，以Dictionary<key, value>形式返回
/// </summary>
/// <param name="url">url</param>
/// <returns>Dictionary<key, value>形式返回</returns>
public static Dictionary<string, string> GetParams(string url)
{
int intPos = url.IndexOf("?");
if (url == null || url.Length < 1 || intPos < 1)
{
return null;
}
else
{
Dictionary<string, string> dt = new Dictionary<string, string>();
string strRight = url.Substring(intPos + 1);
string[] arrPram = StringSplit(strRight, "&");
for (int i = 0; i < arrPram.Length; i++)
{
string[] arrPramName = StringSplit(arrPram[i], "=");
dt.Add(arrPramName[0].ToLower(), arrPramName[1].ToLower());
}
return dt;
}
}

/// <summary>
/// 用指定的key：value  替换目标url的参数是叫key的值，如果不存在，就添加一个参数key=value
/// </summary>
/// <param name="url">目标url</param>
/// <param name="key">目标参数key名字</param>
/// <param name="value">新的Value</param>
/// <returns>替换后新的url</returns>
public static string ReplaceUrlParam(string url, string key, string value)
{
string new_returnurl = "";
Dictionary<string, string> d = Safe.GetParams(url.ToLower());
d = d ?? new Dictionary<string, string>();
if (d.ContainsKey(key))
{
d.Remove(key);
d.Add(key, value);
}
else
{
d.Add(key, value);
}
if (d != null && d.Count > 0)
{
int i = 0;
foreach (KeyValuePair<string, string> kv in d)
{
if (i == 0)
{
new_returnurl += "?" + kv.Key + "=" + kv.Value;
}
else
{
new_returnurl += "&" + kv.Key + "=" + kv.Value;
}
i++;
}
}
new_returnurl = url.Split('?')[0] + new_returnurl;
return new_returnurl;
}

java:

/**
* 拆分URL，返回参数的键值对
* @Method: GetParams
* @ @param url 被处理url
* @ @return
* @return Map<String,String>
* @throws
*/
public static Map<String, String> GetParams(String url) {
int intPos = url.indexOf("?");
if (url == null || url.length() < 1 || intPos < 1) {
return null;
} else {
Map<String, String> map = new HashMap<String, String>();
String strRight = url.substring(intPos + 1);
String[] arrPram = strRight.split("&");

for (int i = 0; i < arrPram.length; i++) {
String[] arrPramName = arrPram[i].split("=");
map.put(arrPramName[0].toLowerCase(), arrPramName[1].toLowerCase());
}
return map;
}
}

public static String ReplaceUrlParam(String url, String key, String value) {
String new_returnurl = "";
Map<String, String> map = GetParams(url);
if (map == null) {
map = new HashMap<String, String>();
}
if (map.containsKey(key)) {
map.remove(key);
if(value==null||value==""){
}else{
map.put(key, value);
}
}else{
if(value==null||value==""){
}else{
map.put(key, value);
}
}

if (map != null && map.size() > 0) {
int i = 0;
for (Map.Entry<String, String> kv : map.entrySet()) {

if (i == 0) {
new_returnurl += "?" + kv.getKey() + "=" + kv.getValue();
} else {
new_returnurl += "&" + kv.getKey() + "=" + kv.getValue();
}
i++;
}
}
new_returnurl = url.split("[?]")[0] + new_returnurl;
return new_returnurl;
}

注意：java版本的ReplaceUrlParam比C#版本的多个去除参数功能（如果value值为null，那么，url就会去掉Key对应的参数）