个人项目（wc.exe）【java】

 1    public static int CountLine(String filename) {
 2        int LineNum = 0;     
 3        FileReader file = null;   //尚未分配内存空间
 4        BufferedReader brin = null;       //尚未分配内存空间
 5        try {
 6            file = new FileReader(filename);
 7            brin = new BufferedReader(file);
 8            while((brin.readLine()) != null)  {     //循环读取分行文本，判断是否已经读到文件末尾
 9                LineNum++;                    //行数+1
10            }
11            System.out.println("文件的行数为：" + LineNum);
12            brin.close();           //关闭流
13            file.close();
14        }catch (FileNotFoundException e) {
15            System.out.println(filename + "无法在该路径找到文件");
16            return -1;
17        }catch (IOException e) {
18            System.out.println(filename + "输入的文件名有误");
19            return -1;
20        }
21        return LineNum;
22    }

 1    public static int CountWord(String filename) {
 2        String s;
 3        String[] s3 = null;
 4        int WordNum = 0;
 5        FileReader file = null;
 6        BufferedReader brin = null;
 7        try {
 8            file = new FileReader(filename);
 9            brin = new BufferedReader(file);
10            Pattern p = Pattern.compile("[_a-zA-Z]+");      //指定正则表达式的规则为至少匹配一个下划线、大小写英文字母
11            Matcher m = null;
12            while((s = brin.readLine()) != null) {   //分行文本非空时，将分行文本插入到sb中
13                s = s.replaceAll("[^_a-zA-Z]"," ");     //此处认为数字不属于单词，且文件中的单词可含下划线
14                s3 = s.trim().split("\\s+");   //先把两端的空格去掉，再对中间内容根据空格进行分割
15                for(int i = 0; i<s3.length;i++) {
16                    m = p.matcher(s3[i]);      //把s3的每个元素都返回Matcher实例
17                    if(m.matches()) {        //验证s3[i]中的每个元素是否与Pattern.compile的正则表达式模式一致
18                        WordNum++;           //一致则单词数++
19                    }
20                }
21            }
22            System.out.println("文件的单词数为：" + WordNum);
23            brin.close();          //关闭流
24            file.close();          //关闭文件流
25        }catch (FileNotFoundException e) {
26            System.out.println(filename + "无法在该路径找到文件");
27            return -1;
28        }catch (IOException e) {
29            System.out.println(filename + "输入的文件名有误");
30            return -1;
31        }//由于PatternSyntaxException为运行时刻异常，此处不进行处理
32        return WordNum;
33    }

 1   public static int CountCharacter(String filename) {
 2        String s;   
 3        int CharNum = 0;
 4        char[] ch;
 5        FileReader file = null;
 6        BufferedReader brin = null;
 7        try {
 8            file = new FileReader(filename);
 9            brin = new BufferedReader(file);
10            while((s = brin.readLine()) != null) {    //分行读取文本，结果为string类型
11                ch = s.toCharArray();  //将一行读取出来的内容存入字符数组中
12                for(char temp : ch) {      //遍历ch数组，如果发现有空格则不对CharNum进行++操作
13                    if(temp != ‘ ‘) {
14                        CharNum++;
15                    }
16                }
17            }
18            System.out.println("文件的字符数为：" + CharNum);
19            brin.close();        //关闭流
20            file.close();
21        }catch (FileNotFoundException e) {
22            System.out.println(filename + "无法在该路径找到文件");
23            return -1;
24        }catch (IOException e) {
25            System.out.println(filename + "输入的文件名有误");
26            return -1;
27        }
28        return CharNum;
29    }

 1     public static void main(String[] args) throws IOException,ArrayIndexOutOfBoundsException{
 2         int i;
 3         String temp = null;
 4         System.out.println("请输入命令：");
 5         Scanner input = new Scanner(System.in);     //从cmd输入控制参数及file_name
 6         if(input.hasNext()) {
 7                 temp = input.nextLine();             //结束扫描的输入
 8             }
 9             String[] strwords = temp.split(" ");         //用空格分隔输入的参数以及文件名
10             String filename = strwords[strwords.length-1];     //路径为输入的最后一个参数
11             
12             
13             for(i = 0; i<strwords.length-1; i++)   //从开头到文件名字前面都是属于parameter
14                 {
15                     if(strwords[i].equals("-c")) 
16                         Count.CountCharacter(filename);
17                     if(strwords[i].equals("-w"))
18                         Count.CountWord(filename);
19                     if(strwords[i].equals("-l"))
20                         Count.CountLine(filename);
21                 }
22             input.close();   //关闭流   
23     }

package test;

import static org.junit.Assert.*;

//import org.junit.Before;
import org.junit.Test;

import src.Count;

import org.junit.Ignore;

public class CountTest {

    
    @Ignore
    public void setUp() throws Exception {
    }

    @Test
    public void testCountChar() {
        assertEquals(6,Count.CountCharacter("C:\\Users\\Dell\\Desktop\\test100.txt"));
    }

    @Test
    public void testCountWord() {
        assertEquals(2,Count.CountWord("C:\\Users\\Dell\\Desktop\\test\\test3.txt"));
    }
    
        
    @Test
    public void testCountLine() {
        assertEquals(1,Count.CountLine("C:\\Users\\Dell\\Desktop\\test\\test3.txt"));
    }
}