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
{
/**
* 读取一个网页全部内容
*/
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();
}
/**
*
* @param s
* @return 获得网页标题
*/
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);
}
/**
*
* @param s
* @return 获得链接
*/
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;
}
/**
*
* @param s
* @return 获得脚本代码
*/
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;
}
/**
*
* @param s
* @return 获得CSS
*/
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;
}
/**
*
* @param s
* @return 去掉标记
*/
public String outTag(final String s)
{
return s.replaceAll("<.*?>", "");
}
/**
*
* @param s
* @return 获取雅虎知识堂文章标题及内容
*/
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;
}
/**
*
* @param args
* 测试一组网页,针对雅虎知识堂
*/
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");
/*
* http://ks.cn.yahoo.com/question/1307121201133.html
* http://ks.cn.yahoo.com/question/1307121101907.html
* http://ks.cn.yahoo.com/question/1307121101907_2.html
* http://ks.cn.yahoo.com/question/1307121101907_3.html
* http://ks.cn.yahoo.com/question/1307121101907_4.html
* http://ks.cn.yahoo.com/question/1307121101907_5.html
* http://ks.cn.yahoo.com/question/1307121101907_6.html
* http://ks.cn.yahoo.com/question/1307121101907_7.html
* http://ks.cn.yahoo.com/question/1307121101907_8.html
*/
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"));
}
/*
* String htmlurl[] = {
* "http://ks.cn.yahoo.com/question/1307121201133.html",
* "http://ks.cn.yahoo.com/question/1307121101907.html",
* "http://ks.cn.yahoo.com/question/1307121101907_2.html",
* "http://ks.cn.yahoo.com/question/1307121101907_3.html",
* "http://ks.cn.yahoo.com/question/1307121101907_4.html",
* "http://ks.cn.yahoo.com/question/1307121101907_5.html",
* "http://ks.cn.yahoo.com/question/1307121101907_6.html",
* "http://ks.cn.yahoo.com/question/1307121101907_7.html",
* "http://ks.cn.yahoo.com/question/1307121101907_8.html" }; WebContent
* wc = new WebContent(); HashMap<String, String> hm = new HashMap<String,
* String>(); for (int i = 0; i < htmlurl.length; i++) { hm =
* wc.getFromYahoo(htmlurl[i]); System.out.println("标题: " +
* hm.get("title")); System.out.println("内容: \n" + hm.get("original")); }
*/
/*
* String html=""; String link=""; String sscript=""; String content="";
* System.out.println(htmlurl+" 开始读取网页内容:");
* html=wc.getOneHtml(htmlurl); System.out.println(htmlurl+"
* 读取完毕开始分析……"); html=html.replaceAll("(<script.*?)((\r\n)*)(.*?)((\r\n)*)(.*?)(</script>)","
* ");//去除脚本 html=html.replaceAll("(<style.*?)((\r\n)*)(.*?)((\r\n)*)(.*?)(</style>)","
* ");//去掉CSS html=html.replaceAll("<title>.*?</title>"," ");//除去页面标题
* html=html.replaceAll("<a[^>]*href=(\"([^\"]*)\"|\'([^\']*)\'|([^\\s>]*))[^>]*>(.*?)</a>","
* ");//去掉链接 html=html.replaceAll("(\\s){2,}?"," ");//除去多余空格
* html=wc.outTag(html);//多余标记 System.out.println(html);
*/
/*
* String s[]=html.split(" +"); for(int i=0;i<s.length;i++){
* content=(content.length()>s[i].length())?content:s[i]; }
* System.out.println(content);
*/
// System.out.println(htmlurl+"网页内容结束");
/*
* System.out.println(htmlurl+"网页脚本开始:"); List
* script=wc.getScript(html); for(int i=0;i<script.size();i++){
* System.out.println(script.get(i)); }
* System.out.println(htmlurl+"网页脚本结束:");
*
* System.out.println(htmlurl+"CSS开始:"); List css=wc.getCSS(html);
* for(int i=0;i<css.size();i++){ System.out.println(css.get(i)); }
* System.out.println(htmlurl+"CSS结束:");
*
* System.out.println(htmlurl+"全部链接内容开始:"); List list=wc.getLink(html);
* for(int i=0;i<list.size();i++){ link=list.get(i).toString(); }
* System.out.println(htmlurl+"全部链接内容结束:");
*
* System.out.println("内容"); System.out.println(wc.outTag(html));
*/
}
}
分享到:
相关推荐
java网页抓取数据
Java网页抓取数据
java网页抓取所需的Jsoup三个包 jsoup-1.8.1.jar
包含jar包commons-logging,httpclient-4.1.2.jar,httpcore-4.2.1.jar main类文件,文档,源码
java抓取网页数据实现
java抓取网页数据,主要用于抓取手机号和身份证查询网站的数据。
java程序,能进行简单的网页抓取,及数据抓取,里面还有火车采集器的内容
Java抓取https网页数据,解决peer not authenticated异常。导入eclipse就能运行,带有所用的jar包(commons-httpclient-3.1.jar,commons-logging.jar,httpclient-4.2.5.jar,httpcore-4.2.4.jar)
简单的实现网页数据抓取的demo。java实现
java简单的抓取网页内容的程序java简单的抓取网页内容的程序java简单的抓取网页内容的程序java简单的抓取网页内容的程序java简单的抓取网页内容的程序java简单的抓取网页内容的程序java简单的抓取网页内容的程序java...
java爬虫抓取网页数据教程.pdf
java抓取网页java工具类java抓取网页java工具类
非常好的一个java版本的网络爬虫,下载直接可以运行。可以后台登陆然后再抓取。值得大家研究。
Java抓取网页内容三种方式
java抓取网页内容 ,简单实用,初学
简单Java爬虫,抓取网页内容,让你了解爬虫机制,熟悉网络编程
Java编程指南(网页爬虫机器人聚合器)
Java抓取网页数据的两种方法:(1)抓取原网页 (2)抓取网页JS返回数据
利用HttpClient抓取网页中简单的数据,数据可存入数据库进行分析