Java读取网页数据并分析
2013年09月16日
⁄ 综合
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- 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;
-
-
- public class WebContent
- {
-
- public String getOneHtml(final String htmlurl) throws IOException
- {
- URL url;
- String temp;
- final StringBuffer sb = new StringBuffer();
- try
- {
- url = new URL(htmlurl);
- final BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream(), "utf-8"));// 读取网页全部内容
- while ((temp = in.readLine()) != null)
- {
- sb.append(temp);
- }
- in.close();
- }
- catch (final MalformedURLException me)
- {
- System.out.println("你输入的URL格式有问题!请仔细输入");
- me.getMessage();
- throw me;
- }
- catch (final IOException e)
- {
- e.printStackTrace();
- throw e;
- }
- return sb.toString();
- }
-
-
- public String getTitle(final String s)
- {
- String regex;
- String title = "";
- final List<String> list = new ArrayList<String>();
- regex = "<title>.*?</title>";
- final Pattern pa = Pattern.compile(regex, Pattern.CANON_EQ);
- final 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);
- }
-
-
- public List<String> getLink(final String s)
- {
- String regex;
- final List<String> list = new ArrayList<String>();
- regex = "<a[^>]*href=(\"([^\"]*)\"|\'([^\']*)\'|([^\\s>]*))[^>]*>(.*?)</a>";
- final Pattern pa = Pattern.compile(regex, Pattern.DOTALL);
- final Matcher ma = pa.matcher(s);
- while (ma.find())
- {
- list.add(ma.group());
- }
- return list;
- }
-
-
- public List<String> getScript(final String s)
- {
- String regex;
- final List<String> list = new ArrayList<String>();
- regex = "<script.*?</script>";
- final Pattern pa = Pattern.compile(regex, Pattern.DOTALL);
- final Matcher ma = pa.matcher(s);
- while (ma.find())
- {
- list.add(ma.group());
- }
- return list;
- }
-
-
- public List<String> getCSS(final String s)
- {
- String regex;
- final List<String> list = new ArrayList<String>();
- regex = "<style.*?</style>";
- final Pattern pa = Pattern.compile(regex, Pattern.DOTALL);
- final Matcher ma = pa.matcher(s);
- while (ma.find())
- {
- list.add(ma.group());
- }
- return list;
- }
-
-
- public String outTag(final String s)
- {
- return s.replaceAll("<.*?>", "");
- }
-
-
- public HashMap<String, String> getFromYahoo(final String s)
- {
- final HashMap<String, String> hm = new HashMap<String, String>();
- final StringBuffer sb = new StringBuffer();
- String html = "";
- System.out.println("\n------------------开始读取网页(" + s + ")--------------------");
- try
- {
- html = getOneHtml(s);
- }
- catch (final Exception e)
- {
- e.getMessage();
- }
- // System.out.println(html);
- System.out.println("------------------读取网页(" + s + ")结束--------------------\n");
- System.out.println("------------------分析(" + s + ")结果如下--------------------\n");
- String title = outTag(getTitle(html));
- title = title.replaceAll("_雅虎知识堂", "");
- // Pattern pa=Pattern.compile("<div
- // class=\"original\">(.*?)((\r\n)*)(.*?)((\r\n)*)(.*?)</div>",Pattern.DOTALL);
- final Pattern pa = Pattern.compile("<div class=\"original\">(.*?)</p></div>", Pattern.DOTALL);
- final Matcher ma = pa.matcher(html);
- while (ma.find())
- {
- sb.append(ma.group());
- }
- String temp = sb.toString();
- temp = temp.replaceAll("(<br>)+?", "\n");// 转化换行
- temp = temp.replaceAll("<p><em>.*?</em></p>", "");// 去图片注释
- hm.put("title", title);
- hm.put("original", outTag(temp));
- return hm;
-
- }
-
-
- public static void main(final String args[])
- {
- String url = "";
- final List<String> list = new ArrayList<String>();
- System.out.print("输入URL,一行一个,输入结束后输入 go 程序开始运行: \n");
-
- final BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
- try
- {
- while (!(url = br.readLine()).equals("go"))
- {
- list.add(url);
- }
- }
- catch (final Exception e)
- {
- e.getMessage();
- }
- final WebContent wc = new WebContent();
- HashMap<String, String> hm = new HashMap<String, String>();
- for (int i = 0; i < list.size(); i++)
- {
- hm = wc.getFromYahoo(list.get(i));
- System.out.println("标题: " + hm.get("title"));
- System.out.println("内容: \n" + hm.get("original"));
- }
-
-
-
-
-
- // System.out.println(htmlurl+"网页内容结束");
-
- }
- }