抓網頁獲取本機ip地址java

獲取本機ip地址的方法一、實現語言:java;二、實現原理：連接網絡-采用java連接網絡的方法。URLConnection.讀取網頁信息。利用正則表達式查找網頁中ip地址信息。保存查找的地址信息到文件web.txt里。(以追加的方式)Web.txt:IP＞連接時系統時間。實現代碼共享如下。包含兩個文件：main_.java,webCatch.java運行之后會生成web.txt。Main_.javapublicclassmain_{/***@paramargs*/publicstaticvoidmain(String[]args){//TODOAuto-generatedmethodstubwebCatchwc=newwebCatch();Stringregex="";wc.setRegex(regex);wc.setUrlStr("/ip2city.asp");wc.show();}}webCatch.javaimportjava.io.BufferedReader;importjava.io.FileNotFoundException;importjava.io.FileOutputStream;importjava.io.IOException;importjava.io.InputStream;importjava.io.InputStreamReader;importjava.io.OutputStreamWriter;importjava.io.PrintWriter;.MalformedURLException;.URL;.URLConnection;importjava.text.DateFormat;importjava.util.Calendar;importjava.util.Date;importjava.util.regex.Matcher;importjava.util.regex.Pattern;publicclasswebCatch{Stringregex=”[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}";Matchermt=null;Patternpt=Ppile(regex);URLurl=null;//StringurlStr="/ip2city.asp";StringurlStr="";publicStringgetDate(){Dateno=newDate();Calendarcal=Calendar.getInstance();DateFormatdmt=DateFormat.getDateTimeInstance(DateFormat.FULL,DateFormat.FULL);returndmt.format(no);}publicStringgetRegex(){returnregex;}publicvoidsetRegex(Stringregex){this.regex=regex;}publicStringgetUrlStr(){returnurlStr;}publicvoidsetUrlStr(StringurlStr){this.urlStr=urlStr;}publicvoidshow(){try{this.url=newURL(this.urlStr);URLConnectionconn=this.url.openConnection();conn.setDoOutput(true);InputStreamin=this.url.openStream();Stringtxt=this.getWeb(in);in.close();//System.out.print(txt);}catch(MalformedURLExceptione){//TODOAuto-generatedcatchblocke.printStackTrace();}catch(IOExceptione){//TODOAuto-generatedcatchblock//e.printStackTrace();//System.out.print(”網絡連接失敗”)；}}/***@paramargs*/privateStringgetWeb(InputStreamin)throwsIOException{//TODOAuto-generatedmethodstubStringBuffers=newStringBuffer();BufferedReaderbr=newBufferedReader(newInputStreamReader(in));PrintWriterpr=null;Stringline=null;StringBuffercc=newStringBuffer();FileOutputStreamfo=null;try{fo=newFileOutputStream("web.txt",true);}catch(FileNotFoundExceptione){//TODOAuto-generatedcatchblocke.printStackTrace();}OutputStreamWriterwr=newOutputStreamWriter(fo);pr=newPrintWriter(wr);while((line=br.readLine())!=null){Stringsss=line;if(sss.length()>0){s.append(sss);/*pr.print(sss);pr.flush();*/}}mt=pt.matcher(s.toString());while(mt.find()){cc.append(mt.group());cc.append(”——>"+this.getDate()+"\r\n");}//System.out.print(cc.toString());pr.print(cc);