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java asp分析各種搜索引擎的關(guān)鍵字,自動識別url 中關(guān)鍵字的編碼

更新時間：2009年01月10日 21:39:18 作者：

網(wǎng)上也有一些代碼，大部分都是通過輸入的關(guān)鍵字來識別編碼，并解碼。但是搜索引擎得到的referer來源地址上的關(guān)鍵字是通過URLencode編碼過的，而且各個網(wǎng)站的關(guān)鍵字Urlencode編碼都不一樣，gbk,utf-8,gb2312等等。

所以必須要通過編碼后的關(guān)鍵字，例如“解析關(guān)鍵字編碼”在google里面輸入搜索，得到編碼后的“%E8%A7%A3%E6%9E%90%E5%85%B3%E9%94%AE%E5%AD%97%E7%BC%96%E7%A0%81”
1.從以上地址中解析出關(guān)鍵字部分。
2.通過編碼后的關(guān)鍵字獲取編碼時的編碼名稱（如：gbk,utf-8等等）
3.用URLdecode(keywords,encodeCode)來解碼得到對應(yīng)的關(guān)鍵字。
以下是java代碼的實現(xiàn)：

復(fù)制代碼代碼如下:

 
package test; 
import java.io.UnsupportedEncodingException; 
import java.net.URLDecoder; 
import java.util.regex.Matcher; 
import java.util.regex.Pattern; 
public class ParseURLKeyword { 
public static void main(String[] args) { 
String url = "http://www.google.co.kr/search?hl=en&q=%ED%95%9C%EA%B5%AD%EC%96%B4+&btnG=Google+Search&aq=f&oq="; 
System.out.println(ParseURLKeyword.getKeyword(url)); 
System.out.println(""); 
url = "http://www.google.cn/search?q=%E6%8F%90%E5%8F%96+%E6%90%9C%E7%B4%A2%E5%BC%95%E6%93%8E+%E5%85%B3%E9%94%AE%E5%AD%97&hl=zh-CN&newwindow=1&sa=2"; 
System.out.println(ParseURLKeyword.getKeyword(url)); 
System.out.println(""); 
url = "http://www.google.com.tw/search?hl=zh-CN&q=%E6%B9%98%E9%8B%BC%E4%B8%AD%E5%9C%8B%E9%A6%99%E7%85%99&btnG=Google+%E6%90%9C%E7%B4%A2&aq=f&oq="; 
System.out.println(ParseURLKeyword.getKeyword(url)); 
System.out.println(""); 
url = "http://www.baidu.com/s?wd=%D6%D0%87%F8%D3%D0%BE%80%D8%9F%C8%CE%B9%AB%CB%BE"; 
System.out.println(ParseURLKeyword.getKeyword(url)); 
System.out.println(""); 
url = "http://www.baidu.com/s?wd=%C6%F3%D2%B5%CD%C6%B9%E3"; 
System.out.println(ParseURLKeyword.getKeyword(url)); 
System.out.println(""); 
} 
public static String getKeyword(String url){ 
String keywordReg = "(?:yahoo.+?[\\?|&]p=|openfind.+?query=|google.+?q=|lycos.+?query=|onseek.+?keyword=|search\\.tom.+?word=|search\\.qq\\.com.+?word=|zhongsou\\.com.+?word=|search\\.msn\\.com.+?q=|yisou\\.com.+?p=|sina.+?word=|sina.+?query=|sina.+?_searchkey=|sohu.+?word=|sohu.+?key_word=|sohu.+?query=|163.+?q=|baidu.+?wd=|soso.+?w=|3721\\.com.+?p=|Alltheweb.+?q=)([^&]*)"; 
String encodeReg = "^(?:[\\x00-\\x7f]|[\\xfc-\\xff][\\x80-\\xbf]{5}|[\\xf8-\\xfb][\\x80-\\xbf]{4}|[\\xf0-\\xf7][\\x80-\\xbf]{3}|[\\xe0-\\xef][\\x80-\\xbf]{2}|[\\xc0-\\xdf][\\x80-\\xbf])+$"; 
Pattern keywordPatt = Pattern.compile(keywordReg); 
StringBuffer keyword = new StringBuffer(20); 
Matcher keywordMat = keywordPatt.matcher(url); 
while (keywordMat.find()) { 
keywordMat.appendReplacement(keyword, "$1"); 
} 
if (!keyword.toString().equals("")){ 
String keywordsTmp = keyword.toString().replace("http://www.", ""); 
Pattern encodePatt = Pattern.compile(encodeReg); 
String unescapeString = ParseURLKeyword.unescape(keywordsTmp); 
Matcher encodeMat = encodePatt.matcher(unescapeString); 
String encodeString = "gbk"; 
if (encodeMat.matches()) encodeString = "utf-8"; 
try { 
return URLDecoder.decode(keywordsTmp, encodeString); 
} catch (UnsupportedEncodingException e) { 
return ""; 
} 
} 
return ""; 
} 
public static String unescape(String src) { 
StringBuffer tmp = new StringBuffer(); 
tmp.ensureCapacity(src.length()); 
int lastPos = 0, pos = 0; 
char ch; 
while (lastPos < src.length()) { 
pos = src.indexOf("%", lastPos); 
if (pos == lastPos) { 
if (src.charAt(pos + 1) == 'u') { 
ch = (char) Integer.parseInt(src.substring(pos + 2, pos + 6), 16); 
tmp.append(ch); 
lastPos = pos + 6; 
} else { 
ch = (char) Integer.parseInt(src.substring(pos + 1, pos + 3), 16); 
tmp.append(ch); 
lastPos = pos + 3; 
} 
} else { 
if (pos == -1) { 
tmp.append(src.substring(lastPos)); 
lastPos = src.length(); 
} else { 
tmp.append(src.substring(lastPos, pos)); 
lastPos = pos; 
} 
} 
} 
return tmp.toString(); 
} 
} 

以下是Asp的實現(xiàn)代碼：

復(fù)制代碼代碼如下:

 
Function DecodeURI(s) 
s = UnEscape(s) 
Dim reg, cs 
cs = "GBK" 
Set reg = New RegExp 
reg.Pattern = "^(?:[\x00-\x7f]|[\xfc-\xff][\x80-\xbf]{5}|[\xf8-\xfb][\x80-\xbf]{4}|[\xf0-\xf7][\x80-\xbf]{3}|[\xe0-\xef][\x80-\xbf]{2}|[\xc0-\xdf][\x80-\xbf])+$" 
If reg.Test(s) Then cs = "UTF-8" 
Set reg = Nothing 
Dim sm 
Set sm = CreateObject("ADODB.Stream") 
With sm 
.Type = 2 
.Mode = 3 
.Open 
.CharSet = "iso-8859-1" 
.WriteText s 
.Position = 0 
.CharSet = cs 
DecodeURI = .ReadText(-1) 
.Close 
End With 
Set sm = Nothing 
End Function 
Response.Write DecodeURI("%B8%A7%CB%B3%C7%E0%CB%C9%D2%A9%D2%B5") 
Response.Write DecodeURI("%E6%8A%9A%E9%A1%BA%E9%9D%92%E6%9D%BE%E8%8D%AF%E4%B8%9A") 