统计字母出现频率及其单词个数

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.text.DecimalFormat;
import java.util.HashMap;
import java.util.Map;

public class TONGJI {
    public static Map<String,Integer> map1=new HashMap<String,Integer>();
    static int g_Wordcount[]=new int[27];
    static int g_Num[]=new int[27];
    
    static String []unUse=new String[] {
        "it",
        "in",
        "to",
        "of",
        "the",
        "and",
        "that",
        "for"
    };
    
    public static void main(String arg[]) {
        daoruFiles("piao.txt","tongji");
        traverseFolder2("C:\\Users\\Halo\\javatest\\pipei\\piao");
        
    }
    public static void daoruFiles(String a,String dc)
    {
        map1.clear();
        try {
            daoru(a);
        } catch (IOException e) {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
            
        }
        String sz[];
        Integer num[];
        final int MAXNUM=10; //统计的单词出现最多的前n个的个数
        
        for(int i=0;i<g_Wordcount.length;i++)
        {
            g_Wordcount[i]=0;
            g_Num[i]=i;
        }
        
        sz=new String[MAXNUM+1];
        num=new Integer[MAXNUM+1];
        Pipei pipei=new Pipei();
        int account =1;
        //Vector<String> ve1=new Vector<String>();
        try {
            daoru(a);
        } catch (IOException e) {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
        }
        System.out.println("英文单词的出现情况如下:");
        int g_run=0;
        
        for(g_run=0;g_run<MAXNUM+1;g_run++)
        {
            account=1;
            for(Map.Entry<String,Integer> it : Pipei.map1.entrySet())
            {
                if(account==1)
                {
                    sz[g_run]=it.getKey();
                    num[g_run]=it.getValue();
                    account=2;
                }
                if(account==0)
                {
                    account=1;
                    continue;
                }
                if(num[g_run]<it.getValue())
                {
                    sz[g_run]=it.getKey();
                    num[g_run]=it.getValue();
                }
                //System.out.println("英文单词: "+it.getKey()+" 该英文单词出现次数: "+it.getValue());
            }
            Pipei.map1.remove(sz[g_run]);
        }
        int g_count=1;
        String tx1=new String();
        String tx2=new String();
        for(int i=0;i<g_run;i++)
        {
            if(sz[i]==null)
                continue;
            if(sz[i].equals(""))
                continue;
            tx1+="出现次数第"+(g_count)+"多的单词为:"+sz[i]+"\t\t\t出现次数: "+num[i]+"\r\n";
            System.out.println("出现次数第"+(g_count)+"多的单词为:"+sz[i]+"\t\t\t出现次数: "+num[i]);
            g_count++;
        }
        try {
            daochu(tx1,dc+"2.txt");
        } catch (IOException e) {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
        }
        
        //------------------------------
        int temp=g_Wordcount[0];
        int numtemp=0;
        for(int i=0;i<26;i++)
        {
            for(int j=i;j<26;j++)
            {
                if(g_Wordcount[j]>g_Wordcount[i])
                {
                    temp=g_Wordcount[i];
                    g_Wordcount[i]=g_Wordcount[j];
                    g_Wordcount[j]=temp;
                    numtemp=g_Num[i];
                    g_Num[i]=g_Num[j];
                    g_Num[j]=numtemp;
                    
                }
            }
        }
        int sum=0;
        for(int i=0;i<26;i++)
        {
            sum+=g_Wordcount[i];
        }
        for(int i=0;i<26;i++)
        {
            char c=(char) ('a'+g_Num[i]);
            tx2+=c+":"+String.format("%.2f%% \r\n", (double)g_Wordcount[i]/sum*100);
        }
        try {
            daochu(tx2,dc+"1.txt");
        } catch (IOException e) {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
        }
        
        //------------------------------
        
    }
    public static void daoru(String s) throws IOException
    {
        
        File a=new File(s);
        FileInputStream b = new FileInputStream(a);
        InputStreamReader c=new InputStreamReader(b,"UTF-8");
        String string2=new String("");
        while(c.ready())
        {
            char string1=(char) c.read();
            if(WordNum(string1)>=0)
            {
                g_Wordcount[WordNum(string1)]+=1;
            }
            
            //------------------------
            if(!isWord(string1))
            {
                if(!isBaseWord(string2))
                {
                    if(map1.containsKey(string2.toLowerCase()))
                    {
                        Integer num1=map1.get(string2.toLowerCase())+1;
                        map1.put(string2.toLowerCase(),num1);
                    }
                    else
                    {
                        Integer num1=1;
                        map1.put(string2.toLowerCase(),num1);
                    }
                }
                string2="";
            }
            else
            {
                if(isInitWord(string1))
                {
                    string2+=string1;
                }
            }
        }
        if(!string2.isEmpty())
        {
            if(!isBaseWord(string2))
            {
                if(map1.containsKey(string2.toLowerCase()))
                {
                    Integer num1=map1.get(string2.toLowerCase())+1;
                    map1.put(string2.toLowerCase(),num1);
                }
                else
                {
                    Integer num1=1;
                    map1.put(string2.toLowerCase(),num1);
                }
            }
            
            string2="";
        }
        c.close();
        b.close();
    }
    public static void daochu(String txt,String outfile) throws IOException
    {
        File fi=new File(outfile);
        FileOutputStream fop=new FileOutputStream(fi);
        OutputStreamWriter ops=new OutputStreamWriter(fop,"UTF-8");
        ops.append(txt);
        ops.close();
        fop.close();
    }
    public static boolean isWord(char a)
    {
        if(a<='z'&&a>='a'||a<='Z'&&a>='A'||a=='\'')
            return true;
        return false;
    }
    public static boolean isInitWord(char a)
    {
        if(a<='z'&&a>='a'||a<='Z'&&a>='A'||a>'0'&&a<'9'||a=='\'')
            return true;
        return false;
    }
    public static boolean isBaseWord(String word)
    {
        for(int i=0;i<unUse.length;i++)
        {
            if(unUse[i].equals(word)||word.length()==1)
                return true;
        }
        return false;
    }
    public static int WordNum(char a)
    {
        if(a<='z'&&a>='a')
            return a-'a';
        else if(a<='Z'&&a>='A')
            return a-'A';
        return -1;
    }
    //----递归文件夹
    public static void traverseFolder2(String path) {

        File file = new File(path);
        if (file.exists()) {
            File[] files = file.listFiles();
            if (null == files || files.length == 0) {
                System.out.println("文件夹是空的!");
                return;
            } else {
                for (File file2 : files) {
                    if (file2.isDirectory()) {
                        System.out.println("文件夹:" + file2.getAbsolutePath());
                        traverseFolder2(file2.getAbsolutePath());
                    } else {
                        System.out.println("文件:" + file2.getAbsolutePath());
                        String name=file2.getName();
                        daoruFiles(file2.getAbsolutePath(), file2.getParentFile()+"\\"+name.replace(".txt", "")+"tongji");
                        
                    }
                }
            }
        } else {
            System.out.println("文件不存在!");
        }
    }

    
}