Java实现统计文档中关键字出现的次数
目录
- 1.实现URL文档的拷贝
- 2.实现关键词在文档的查询功能
- 3.显示效果
该代码简易实现了获取URL地址后对文档进行关键字统计的功能。具体的自己看吧
1.实现URL文档的拷贝
import java.util.Scanner; import java.util.regex.Pattern; import java.net.*; import java.io.*; import javax.swing.*; import javax.swing.UIManager; import java.awt.*; import javax.swing.plaf.FontUIResource; public class TestURL { static String getUserKeyWords=null; //获取用户选择的关键词 public static void main(String[] args) { File copyfile=new File("D:/newTest.txt"); InputStream in=null; BufferedReader br=null; //字符流写入 BufferedWriter out=null; //字符流写出 String urladdress=null; //获取用户输入的URL地址 try { UIManager.put("JOptionPane.messageFont",new FontUIResource(new Font("宋体",Font.BOLD,20))); String getUserURL=JOptionPane.showInputDialog(null,"URL地址:\n","输入URL地址",JOptionPane.PLAIN_MESSAGE); String urlAddr=getUserURL.substring(getUserURL.lastIndexOf("/")); copyfile=new File("D:/"+urlAddr); getUserKeyWords=JOptionPane.showInputDialog(null,"关键字查询:\n","关键字",JOptionPane.PLAIN_MESSAGE); //URL url=new URL("http://news.cctv.com/2019/06/19/ARTIhqziOpWz2COTyHFW063b190619.shtml"); //获取URL地址 URL url=new URL(getUserURL); //获取URL地址 HttpURLConnection urlC=(HttpURLConnection)url.openConnection(); //由URL获取URLConnection对象 in=urlC.getInputStream(); //获取urlC的输入流 br=new BufferedReader(new InputStreamReader(in,"UTF-8")); //将url默认的字节流转成字符流,并以UTF-8的格式写入文档 out=new BufferedWriter(new FileWriter(copyfile)); //将获取的信息写入到TestURL文档中 String length=null; while ((length=br.readLine())!=null) { out.write(Html2Text(length)); out.newLine(); } } catch (Exception e) { e.getMessage(); }finally{ System.out.println("拷贝完成!"); try{ if (in!=null){in.close();} if (out!=null){out.close();} if (br!=null){br.close();} }catch(Exception ee){ ee.getMessage(); } } TextFileSearch search = new TextFileSearch(); search.SearchKeyword(copyfile, getUserKeyWords); } //程序到这就结束了 ,下面是不同方法实现对html的剔除功能,可以忽略 //从html中提取纯文本 ,这部分其实没什么用,最开始想截取html中的字符串,后面检查也没啥用,就没删除,保留着 public static String Html2Text(String inputString) { String htmlStr = inputString; // 含html标签的字符串 String textStr = ""; java.util.regex.Pattern p_script; java.util.regex.Matcher m_script; java.util.regex.Pattern p_style; java.util.regex.Matcher m_style; java.util.regex.Pattern p_html; java.util.regex.Matcher m_html; try { String regEx_script = "<[\\s]*?script[^>]*?>[\\s\\S]*?<[\\s]*?\\/[\\s]*?script[\\s]*?>"; // 定义script的正则表达式{或<script[^>]*?>[\\s\\S]*?<\\/script> String regEx_style = "<[\\s]*?style[^>]*?>[\\s\\S]*?<[\\s]*?\\/[\\s]*?style[\\s]*?>"; // 定义style的正则表达式{或<style[^>]*?>[\\s\\S]*?<\\/style> String regEx_html = "<[^>]+>"; // 定义HTML标签的正则表达式 p_script = Pattern.compile(regEx_script, Pattern.CASE_INSENSITIVE); m_script = p_script.matcher(htmlStr); htmlStr = m_script.replaceAll(""); // 过滤script标签 p_style = Pattern.compile(regEx_style, Pattern.CASE_INSENSITIVE); m_style = p_style.matcher(htmlStr); htmlStr = m_style.replaceAll(""); // 过滤style标签 p_html = Pattern.compile(regEx_html, Pattern.CASE_INSENSITIVE); m_html = p_html.matcher(htmlStr); htmlStr = m_html.replaceAll(""); // 过滤html标签 textStr = htmlStr; } catch (Exception e) {System.err.println("Html2Text: " + e.getMessage()); } //剔除空格行 textStr=textStr.replaceAll("[ ]+", " "); textStr=textStr.replaceAll("(?m)^\\s*$(\\n|\\r\\n)", ""); return textStr;// 返回文本字符串 } /*//从html中提取纯文本,这个部分是简易实现html剔除,只能部分筛选 public static String stripHT(String strHtml){ String txtcontent = strHtml.replaceAll("</?[^>]+>", ""); //剔出<html>的标签 txtcontent = txtcontent.replaceAll("<a>\\s*|\t|\r|\n</a>", "");//去除字符串中的空格,回车,换行符,制表符 return txtcontent; }*/ /* //这个是利用java自带的类实现html剔除功能,基本上没怎么用,这部分可以忽略 import java.io.*; import javax.swing.text.html.*; import javax.swing.text.html.parser.*; public class Html2Text extends HTMLEditorKit.ParserCallback { StringBuffer s; public Html2Text() {} public void parse(Reader in) throws IOException { s = new StringBuffer(); ParserDelegator delegator = new ParserDelegator(); // the third parameter is TRUE to ignore charset directive delegator.parse(in, this, Boolean.TRUE); } public void handleText(char[] text, int pos) { s.append(text); } public String getText() { return s.toString(); } public static void main (String[] args) { try { // the HTML to convert //Reader in=new StringReader("string"); FileReader in = new FileReader("java-new.html"); Html2Text parser = new Html2Text(); parser.parse(in); in.close(); System.out.println(parser.getText()); } catch (Exception e) { e.printStackTrace(); } } }*/ }
2.实现关键词在文档的查询功能
import java.io.Closeable; import java.io.File; import java.io.FileReader; import java.io.IOException; import java.io.LineNumberReader; import javax.swing.UIManager; import javax.swing.*; import java.awt.*; import javax.swing.plaf.FontUIResource; /** * 对文本文件的关键词进行搜索 */ public class TextFileSearch { TestURL tt; public void SearchKeyword(File file,String keyword) { //参数校验 verifyParam(file, keyword); //行读取 LineNumberReader lineReader = null; try { lineReader = new LineNumberReader(new FileReader(file)); String readLine = null; int times = 0;//出现的次数 while((readLine =lineReader.readLine()) != null){ //判断每一行中,出现关键词的次数 int index = 0; //获得readLine的对象值 int next = 0; //定义开始查找关键字的序列号 //int times = 0;//出现的次数 //判断次数 while((index = readLine.indexOf(keyword,next)) != -1) { //从每行的第0个索引开始遍历关键字 next = index + keyword.length(); //下一次的遍历序号为序列号+关键字长度 times++;//次数加1 } /*if(times > 0) { //System.out.println("第"+ lineReader.getLineNumber() +"行" + "出现 "+keyword+" 次数: "+times); }*/ } if (times>0) { UIManager.put("JOptionPane.messageFont",new FontUIResource(new Font("宋体",Font.BOLD,20))); JOptionPane.showMessageDialog(null,"关键字"+"@"+tt.getUserKeyWords+"@"+"共有"+times+"个"); } } catch (IOException e) { e.printStackTrace(); } finally { //关闭流 close(lineReader); } } /** * 参数校验 */ private void verifyParam(File file, String keyword) { //对参数进行校验证 if(file == null ){ throw new NullPointerException("the file is null"); } if(keyword == null || keyword.trim().equals("")){ throw new NullPointerException("the keyword is null or \"\" "); } if(!file.exists()) { throw new RuntimeException("the file is not exists"); } //非目录 if(file.isDirectory()){ throw new RuntimeException("the file is a directory,not a file"); } //可读取 if(!file.canRead()) { throw new RuntimeException("the file can't read"); } } /** * 关闭流 */ private void close(Closeable able){ if(able != null){ try { able.close(); } catch (IOException e) { e.printStackTrace(); able = null; } } } }
3.显示效果
URL地址获取效果图
关键字查询界面
查询后效果图
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