查看文件中每行出现的次数小程序

 1 package com.test;
 2 
 3 import java.io.BufferedReader;
 4 import java.io.File;
 5 import java.io.FileReader;
 6 import java.io.IOException;
 7 import java.util.ArrayList;
 8 import java.util.Iterator;
 9 import java.util.LinkedHashMap;
10 import java.util.List;
11 import java.util.Map;
12 
13 public class FileReadTest {
14     private static BufferedReader br;
15 
16     public static void main(String[] args) throws IOException {
17         File file = new File("E:/1.txt");
18         if (!file.exists() || file.isDirectory()) {
19             System.out.println("文件不存在");
20         }
21         br = new BufferedReader(new FileReader(file));
22         List<String> list = new ArrayList<String>();
23         String readLine = "";
24         while((readLine = br.readLine()) != null){
25             if(!"".equals(readLine.trim())){
26                 list.add(readLine.trim());
27             }
28         }
29         Map<String,Integer> result = new LinkedHashMap<String,Integer>();
30         for(String str : list){
31             if(!result.keySet().contains(str)){
32                 result.put(str, 1);
33             }else{
34                 result.put(str, result.get(str)+1);
35             }
36         }
37         
38         Iterator iter = result.keySet().iterator();
39         while(iter.hasNext()){
40             String key = (String)iter.next();
41             System.out.println(key + "出现的次数为：" + result.get(key));
42         }
43         
44         
45     }
46 }