WordConut

import java.io.*;
import java.util.regex.*;

public class wcFuction {
    private BufferedReader br;
    //文件词统计函数
    int getwordnumber(String filename) throws IOException {
        int num=0;
        String[] strword = null;
        File file = new File(filename);
        if(file.exists()) {
            //读取文件
            FileReader fr = new FileReader(filename);
            br = new BufferedReader(fr);
            String line = null;
            StringBuffer sbf = new StringBuffer();
            while((line=br.readLine())!= null) {
                sbf.append(line);
                String str = sbf.toString();
                //正则表达式替换符号
                str = str.replaceAll("[\\p{Nd}\\u9fa5-\\uffe5\\p{Punct}\\s&&[^-]]", " ");
                //按空格将内容分割
                strword = str.split("\\s+");
                num=strword.length;
            }
            br.close();
            fr.close();
        }else {
            System.out.println("文件不存在,请重新输入文件!");
        }
        return num;
    }
    //文件字符统计函数
    int getCharacternumber(String filename) throws IOException {
        int number = 0;
        String[] strword = null;
        File file = new File(filename);
        if(file.exists()) {
            //读取文件
            FileReader fr = new FileReader(filename);
            br = new BufferedReader(fr);
            String line = null;
            String str=null;
            StringBuffer sbf = new StringBuffer();
            while((line=br.readLine())!= null) {
                sbf.append(line);
                str = sbf.toString();
                strword = str.split("\\s+");
            }
            for(int i=0;i<strword.length;i++) {
                Pattern pattern = Pattern.compile("[0-9a-zA-Z]*");
                Matcher matcher = pattern.matcher(strword[i]);
                if(matcher.find()) {
                    number+=matcher.regionEnd();
                }
            }
            br.close();
            fr.close();
        }else {
            System.out.println("文件不存在,请重新输入文件!");
        }
        return number;
    }
    //文件行数统计函数
    int getlinenumber(String filename) throws IOException {
        int linenum = 0;
        File file = new File(filename);
        if(file.exists()) {
            //读取文件
            FileReader fr = new FileReader(filename);
            //读取文件行数
            LineNumberReader lnr = new LineNumberReader(fr);
            while(lnr.readLine()!= null) {
                linenum=lnr.getLineNumber();
            }
            lnr.close();
            fr.close();
        }else {
            System.out.println("文件不存在,请重新输入文件!");
        }
        return linenum;
    }                    
}

import java.io.IOException;
import java.util.Scanner;

public class wcTest
{
    private static Scanner scanner;
    public static void main(String[] args) throws IOException
    {
        String str = null;
        wcFuction wcf = new wcFuction();
        //循环询问命令输入
        while(true)
        {
            System.out.print("请输入命令:");
            //命令输入
            scanner = new Scanner(System.in);
            if(scanner.hasNext()) 
            {
                str=scanner.nextLine();
            }
            //分割命令，第一个作为判断第二个为文件路径
            String[] strword = str.split(" ");
            if(strword.length==2) 
            {
                if(strword[0].equals("-c"))
                {
                    int chara=wcf.getCharacternumber(strword[1]);
                    System.out.println("该文件的字符数:"+chara);
                }
                else if(strword[0].equals("-w")) 
                {
                    int word=wcf.getwordnumber(strword[1]);
                    System.out.println("该文件的词数:"+word);
                }
                else if(strword[0].equals("-l")) 
                {
                    int line=wcf.getlinenumber(strword[1]);
                    System.out.println("该文件的行数:"+line);
                }
                else
                {
                    if(strword[0].equals("end")) 
                    {
                        break;
                    }
                    else 
                    {
                        System.out.println("命令输入错误，请重新输入！");
                    }
                }
            }
        }
    }
}