单词统计续

1.输出单个文件中的前 N 个最常出现的英语单词。

2.输出文件中所有不重复的单词，按照出现次数由多到少排列，出现次数同样多的，以字典序排列。

3.指定文件目录，对目录下每一个文件执行统计的操作。

4.指定文件目录，是会递归遍历目录下的所有子目录的文件进行统计单词的功能。

package test;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Scanner;
 
 
public class W2 {
 
 
public static String StatList(String str) {
    StringBuffer sb = new StringBuffer();
    HashMap<String ,Integer> has = new HashMap<String ,Integer> (); // 打开一个哈希表
    String[] slist = str.split("[^a-zA-Z\']+");
    for (int i = 0; i < slist.length; i++) 
    {
        if (!has.containsKey(slist[i])) 
        { 
               has.put(slist[i], 1);
        } 
        else
        {
               has.put(slist[i],has.get(slist[i])+1 );
        }
    }
    Iterator<String> iterator = has.keySet().iterator();
    String a[]=new String[100];
    int s[]=new int[100];
    int n=15;
    int judge;
    Scanner in=new Scanner(System.in);
    System.out.println("输入前n个最常出现的单词:");
    n=in.nextInt();
    for(int i=0;i<n;i++)
    {
        iterator = has.keySet().iterator();
        while(iterator.hasNext())
        {
            String word = (String) iterator.next();
            if(s[i]<has.get(word))
            {
                s[i]=has.get(word);
                a[i]=word;
            }
         }
        judge=woor(a[i]);
        if(judge==1)
        {
            n++;
            has.remove(a[i]);
        }
        else
        {
         sb.append("单词：").append(a[i]).append(" 次数").append(has.get(a[i])).append("\r\n");
         has.remove(a[i]);
        }
    }
         return sb.toString();
    }
 
 
    public static void main(String[] args) 
    {
        File file = new File("d:\\文件");
//      // TODO Auto-generated method stub
//      ArrayList<String> fil=getFiles("d:\\文件");//目录下的文件
        ArrayList<String> fil=getDirectory(file);//目录下的文件和子目录里的文件
        for(int i=0;i<fil.size();i++)
        {
        String filePath = fil.get(i);
        //String filePath = "d:\\文件\\单词.txt";
        String sz=W3.readTxtFile(filePath);
        String ltxt=null;
        System.out.println(ltxt=StatList(sz)); 
        try {
        W3.daochu(ltxt);
        } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        }
        }
         
    }
     
    public static int woor(String a)
    {
        int n=0;
        String[] biao= {"a","the","an","and"};
        for(int i=0;i<biao.length;i++)
        {
            if(biao[i].equals(a))
            {
                n=1;
            }
        }
        return n;
    }
     
    public static ArrayList<String> getFiles(String path) {
        ArrayList<String> files = new ArrayList<String>();
        File file = new File(path);
        File[] tempList = file.listFiles();
        for (int i = 0; i < tempList.length; i++) {
            if (tempList[i].isFile()) {
                files.add(tempList[i].toString());
            }
            if (tempList[i].isDirectory()) {
            }
        }
        return files;
    }
     
    private static ArrayList<String> getDirectory(File file) {
        ArrayList<String> files = new ArrayList<String>();
        ArrayList<String> files1 = new ArrayList<String>();
        //获取该目录下的文件列表
        File flist[] = file.listFiles();
        for (File f : flist) {
            if (f.isDirectory()) {
                // 如果f是一个目录
                files1=getFiles(f.getAbsolutePath());
                files.addAll(files1);
                
                getDirectory(f);
            } else {
                //如果f是一个文件
                files.add(f.getAbsolutePath());
            }
        }
        return files;
    }
 
 
}

package test;
 
import java.io.BufferedReader; 
import java.io.File; 
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter; 
//import java.io.Reader; 
//从文本文档中读入
public class W3 {
    public static String readTxtFile(String filePath){ 
        try { 
            String encoding="GBK"; 
            File file=new File(filePath); 
            if(file.isFile() && file.exists()){ //判断文件是否存在 
            InputStreamReader read = new InputStreamReader( 
            new FileInputStream(file),encoding);//考虑到编码格式 
            BufferedReader bufferedReader = new BufferedReader(read); 
            String lineTxt = null;
            String lineText="";
            while((lineTxt = bufferedReader.readLine()) != null)
                { 
                lineText+=(lineTxt); 
                } 
            read.close(); 
            return lineText;
            }
            else
                { 
                System.out.println("找不到指定的文件"); 
                } 
            } catch (Exception e) { 
            System.out.println("读取文件内容出错"); 
            e.printStackTrace(); 
            } 
            return null;
        } 
        public static void daochu(String a) throws IOException
        {
            File file=new File("d:\\文件\\c.txt");
            FileOutputStream fos=new FileOutputStream(file);
            OutputStreamWriter osw = new OutputStreamWriter(fos,"UTF-8");
            osw.append(a);
            osw.close();
            fos.close();
        }
}

package test;
 
import java.io.BufferedReader; 
import java.io.File; 
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter; 
//import java.io.Reader; 
//从文本文档中读入
public class W3 {
    public static String readTxtFile(String filePath){ 
        try { 
            String encoding="GBK"; 
            File file=new File(filePath); 
            if(file.isFile() && file.exists()){ //判断文件是否存在 
            InputStreamReader read = new InputStreamReader( 
            new FileInputStream(file),encoding);//考虑到编码格式 
            BufferedReader bufferedReader = new BufferedReader(read); 
            String lineTxt = null;
            String lineText="";
            while((lineTxt = bufferedReader.readLine()) != null)
                { 
                lineText+=(lineTxt); 
                } 
            read.close(); 
            return lineText;
            }
            else
                { 
                System.out.println("找不到指定的文件"); 
                } 
            } catch (Exception e) { 
            System.out.println("读取文件内容出错"); 
            e.printStackTrace(); 
            } 
            return null;
        } 
        public static void daochu(String a) throws IOException
        {
            File file=new File("d:\\文件\\c.txt");
            FileOutputStream fos=new FileOutputStream(file);
            OutputStreamWriter osw = new OutputStreamWriter(fos,"UTF-8");
            osw.append(a);
            osw.close();
            fos.close();
        }<br><br>
}