文本单词统计并过滤

package wordcont;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.*;

public class wordcount2 {
    public static void main(String [] args) throws IOException  {
        wordcount2 xm=new wordcount2();
        wordcount2.meau();
        
    }
    
    public static  void meau() throws IOException
    {
         System.out.printf("1.查找字母    2.查找单词   3.按单词数查找");
         Scanner sc=new Scanner (System.in);
         int n=sc.nextInt();//输入数字
         
         switch(n)
         {
             case 1:zimu(new File("D:/学习/大二选修java/fly.txt"));break;
             case 2:danci(new File("D:/学习/大二选修java/fly.txt"));break;
             case 3:danci2(new File("D:/学习/大二选修java/fly.txt"));break;
         }
         
        sc.close();

    }
    
    
     public static void zimu(File file){
            double sum=0.0;
            BufferedReader bfr = null;   //定义字符读取(缓冲)流
            try{
                bfr = new BufferedReader(new FileReader(file));
                String value = null; 
                String newValue = "";    
                while((value = bfr.readLine())!=null){    //开始读取文件中的字符
                    newValue = newValue+value;    //存入newValue变量中
                }
                char[] ch = newValue.toCharArray();//把newValue变成字符数组
                TreeMap<Character,Integer> tm = new TreeMap<Character,Integer>(Collections.reverseOrder());
                for(int x = 0;x<ch.length;x++){   
                    char c = ch[x];
                    if((c>=65&&c<=90)||(c>=97&&c<=122)) {
                        sum++;
                        if(tm.containsKey(c)){  //如果TreeMap(tm)中有该键，则取出该键中的值，也就是出现的次数
                            int conut = tm.get(c);
                            tm.put(c,conut+1);  //存入把新值存入tm集合中，如果键相同的话， 新键会替换老键，值也随着变化了
                        }
                        else{
                            tm.put(c, 1);  //如果没有出现该键就说明是第一次出现，然后就存入1次
                        }
                    }
                }
                //下面的是取出TreeMap(tm)中的键和值
                Set<Map.Entry<Character, Integer>> set = tm.entrySet();
                Iterator<Map.Entry<Character, Integer>> iter = set.iterator();
                while(iter.hasNext()){
                    Map.Entry<Character, Integer> map = iter.next();
                    char k = map.getKey();
                    int v = map.getValue();
                   // double baifenbi=0.0;
                   // baifenbi=v/sum;
                   // System.out.println(baifenbi);
                    System.out.println(k+"("+v+")  ");
                }
                meau();
            }
            catch(IOException e){
                System.out.println("文件读取错误");
            }
            finally{
                try{
                    if(bfr!=null)
                        bfr.close();
                }
                catch(IOException e){
                    System.out.println("文件关闭错误");
                }
            }
        }
     
     
     
     public static void danci(File file) throws IOException {

            BufferedReader br = null;
            br = new BufferedReader(new FileReader(file));
            StringBuffer sb = new StringBuffer();
            String text =null;
            while ((text=br.readLine())!= null){
                sb.append(text);// 将读取出的字符追加到stringbuffer中
            }
            br.close();  // 关闭读入流

            String str = sb.toString().toLowerCase(); // 将stringBuffer转为字符并转换为小写
            String[] words = str.split("[^(a-zA-Z)]+");  // 非单词的字符来分割，得到所有单词
            Map<String ,Integer> map = new HashMap<String, Integer>() ;

            for(String word :words){
                if(map.get(word)==null){  // 若不存在说明是第一次，则加入到map,出现次数为1
                    map.put(word,1);
                }else{
                    map.put(word,map.get(word)+1);  // 若存在，次数累加1
                }
            }

            // 排序
            List<Map.Entry<String ,Integer>> list = new ArrayList<Map.Entry<String,Integer>>(map.entrySet());

            Comparator<Map.Entry<String,Integer>> comparator = new Comparator<Map.Entry<String, Integer>>() {
                public int compare(Map.Entry<String, Integer> left, Map.Entry<String, Integer> right) {
                    return (left.getValue().compareTo(right.getValue()));
                }
            };
            // 集合默认升序升序
            Collections.sort(list,comparator);
            
            
            float sum=0;
            float a=0;
            
     
            for(int i=0;i<list.size();i++){// 由高到低输出
                if(list.get(list.size()-i-1).getKey().equals("the")||list.get(list.size()-i-1).getKey().equals("and"))
                {
                    
                }
                else
                {
                    a=list.get(list.size()-i-1).getValue();  
                    sum=sum+a;        //求总字母数
                    System.out.println(list.get(list.size()-i-1).getKey() +":"+list.get(list.size()-i-1).getValue());
                }
            }
            System.out.println("单词总数为:"+sum);
            meau();
        }

     
     public static void danci2(File file) throws IOException {

            BufferedReader br = null;
            br = new BufferedReader(new FileReader(file));
            StringBuffer sb = new StringBuffer();
            String text =null;
            while ((text=br.readLine())!= null){
                sb.append(text);// 将读取出的字符追加到stringbuffer中
            }
            br.close();  // 关闭读入流

            String str = sb.toString().toLowerCase(); // 将stringBuffer转为字符并转换为小写
            String[] words = str.split("[^(a-zA-Z)]+");  // 非单词的字符来分割，得到所有单词
            Map<String ,Integer> map = new HashMap<String, Integer>() ;

            for(String word :words){
                if(map.get(word)==null){  // 若不存在说明是第一次，则加入到map,出现次数为1
                    map.put(word,1);
                }else{
                    map.put(word,map.get(word)+1);  // 若存在，次数累加1
                }
            }

            // 排序
            List<Map.Entry<String ,Integer>> list = new ArrayList<Map.Entry<String,Integer>>(map.entrySet());

            Comparator<Map.Entry<String,Integer>> comparator = new Comparator<Map.Entry<String, Integer>>() {
                public int compare(Map.Entry<String, Integer> left, Map.Entry<String, Integer> right) {
                    return (left.getValue().compareTo(right.getValue()));
                }
            };
            // 集合默认升序升序
            Collections.sort(list,comparator);
            
            BufferedReader br1 = new BufferedReader(new FileReader("D:/学习/大二选修java/nouseword.txt"));

            StringBuffer sb1 = new StringBuffer();
            String text1 =null;
            while ((text1=br1.readLine())!= null){
                sb1.append(text1);// 将读取出的字符追加到stringbuffer中
            }
            br1.close();  // 关闭读入流

            String str1 = sb1.toString().toLowerCase(); // 将stringBuffer转为字符并转换为小写
            String[] words1 = str1.split("[^(a-zA-Z)]+");  // 非单词的字符来分割，得到所有单词
            Map<String ,Integer> map1 = new HashMap<String, Integer>() ;

            for(String word :words1){
                if(map1.get(word)==null){  // 若不存在说明是第一次，则加入到map,出现次数为1
                    map1.put(word,1);
                }else{
                    map1.put(word,map1.get(word)+1);  // 若存在，次数累加1
                }
            }
          
            // 排序
            List<Map.Entry<String ,Integer>> list1 = new ArrayList<Map.Entry<String,Integer>>(map1.entrySet());

            Comparator<Map.Entry<String,Integer>> comparator1 = new Comparator<Map.Entry<String, Integer>>() {
                public int compare(Map.Entry<String, Integer> left, Map.Entry<String, Integer> right) {
                    return (left.getValue().compareTo(right.getValue()));
                }
            };
            // 集合默认升序升序
           
            Collections.sort(list1,comparator1);
            

            
            
            
            
            float sum=0;
            float a=0;
            System.out.printf("请输入单词数");
            Scanner sc=new Scanner (System.in);
             int num=sc.nextInt();//输入数字

             
            for(int i=0;i<num;i++){// 由高到低输出
            int b=0;
                for(int v=0;v<list1.size();v++) {
                    if(list1.get(list1.size()-v-1).getKey().equals(list.get(list.size()-i-1).getKey())) {
                        System.out.println(list.get(list.size()-i-1).getKey()+"单词为无用词汇");
                        b=1;
                        break;
                    }
                }
                if(b==1) {
                    
                }else {
                    a=list.get(list.size()-i-1).getValue();  
                    sum=sum+a;        //求总字母数
                    System.out.println(list.get(list.size()-i-1).getKey() +":"+list.get(list.size()-i-1).getValue());
                }
                    
                
            }
            System.out.println("单词总数为:"+sum);
            meau();
        }

}

实现了对方法的封装处理，建立一个菜单对功能进行操作，并成功建立无用词表进行无用单词的过滤；