java正则 读取html 获取标题/超链接/链接文本/内容
参考链接：http://yijianfengvip.blog.163.com/blog/static/17527343220114278593064/
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;
/**
*
* @author
*
*/
public class WebContent
{
/**
* 读取一个网页全部内容
*/
///此方法 读取小量数据网站 速度较快
public static String getOneHtml(String urlString)throws Exception{
InputStreamReader in = new InputStreamReader(new URL(urlString).openStream());
// read contents into string buffer
StringBuilder input = new StringBuilder();
int ch;
while ((ch = in.read()) != -1) input.append((char) ch);
//System.out.println(input);
return input.toString();
}
///此方法 读取大量数据网站 速度较快 但是不能太大。 例如sina.com.cn 本方法 运行十次耗时 7688毫秒 getOneHtml 耗时 41016毫秒
public static String getAllHtml(String urlString)throws Exception{
// ConnectionManager manager = Parser.getConnectionManager();
// Cookie cookie = new Cookie("ASP.NET_SessionId","szpgjr45ucsacir0d1p4g255");
// Cookie cookie1 = new Cookie("SID", "111017");
// Cookie cookie2 = new Cookie("LID", "");
// manager.setCookie(cookie, "acad.cnki.net");
// manager.setCookie(cookie1, "acad.cnki.net");
// manager.setCookie(cookie2, "acad.cnki.net");
//Parser parser = new Parser("");
Parser parser = new Parser(urlString);
parser.setEncoding("utf8");
String filterStr = "html";
NodeFilter innerFilter = new TagNameFilter(filterStr);
NodeList nodes = parser.parse(innerFilter);
return nodes.toHtml();
//System.out.println(nodes.toHtml());
}
/**
*
* @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));
*/
}
}