Java如何正則表達(dá)式分析讀取網(wǎng)頁內(nèi)容
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Java用正則表達(dá)式分析讀取網(wǎng)頁內(nèi)容
package com.xiaofeng.picup;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/** */pic/p>
*
* @抓取雅虎知識堂的文章標(biāo)題及內(nèi)容（測試） 手動輸入網(wǎng)址抓取，可進(jìn)一步自動抓取整個知識堂的全部內(nèi)容
*
*/
public class WebContent ...{
/** */pic/p>
* 讀取一個網(wǎng)頁全部內(nèi)容
*/
public String getOneHtml(String htmlurl) throws IOException...{
URL url;
String temp;
StringBuffer sb = new StringBuffer();
try ...{
url = new URL(htmlurl);
BufferedReader in = new BufferedReader(new InputStreamReader(url
.openStream(), "utf-8"));/pic/p>
while ((temp = in.readLine()) != null) ...{
sb.append(temp);
}
in.close();
}catch(MalformedURLException me)...{
System.out.println("你輸入的URL格式有問題！請仔細(xì)輸入");
me.getMessage();
throw me;
}catch (IOException e) ...{
e.printStackTrace();
throw e;
}
return sb.toString();
}
/** */pic/p>
*
* @param s
* @return 獲得網(wǎng)頁標(biāo)題
*/
public String getTitle(String s) ...{
String regex;
String title = "";
List<String> list = new ArrayList<String>();
regex = "<title>.*?</title>";
Pattern pa = Pattern.compile(regex, Pattern.CANON_EQ);
Matcher ma = pa.matcher(s);
while (ma.find()) ...{
list.add(ma.group());
}
for (int i = 0; i < list.size(); i++) ...{
title = title + list.get(i);
}
return outTag(title);
}
/** */pic/p>
*
* @param s
* @return 獲得鏈接
*/
public List<String> getLink(String s) ...{
String regex;
List<String> list = new ArrayList<String>();
regex = "<a[^>]*href=("([^"]*)"|'([^']*)'|([^s>]*))[^>]*>(.*?)</a>";
Pattern pa = Pattern.compile(regex, Pattern.DOTALL);
Matcher ma = pa.matcher(s);
while (ma.find()) ...{
list.add(ma.group());
}
return list;
}
/** */pic/p>
*
* @param s
* @return 獲得腳本代碼
*/
public List<String> getScript(String s) ...{
String regex;
List<String> list = new ArrayList<String>();
regex = "<script.*?</script>";
Pattern pa = Pattern.compile(regex, Pattern.DOTALL);
Matcher ma = pa.matcher(s);
while (ma.find()) ...{
list.add(ma.group());
}
return list;
}
/** */pic/p>
*
* @param s
* @return 獲得CSS
*/
public List<String> getCSS(String s) ...{
String regex;
List<String> list = new ArrayList<String>();
regex = "<style.*?</style>";
Pattern pa = Pattern.compile(regex, Pattern.DOTALL);
Matcher ma = pa.matcher(s);
while (ma.find()) ...{
list.add(ma.group());
}
return list;
}
/** */pic/p>
*
* @param s
* @return 去掉標(biāo)記
*/
public String outTag(String s) ...{
return s.replaceAll("<.*?>", "");
}
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