如何从本地磁盘中读取一个文件,进行判断每个字符有多少个

package cn.zsc;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileReader;

import java.io.IOException;

import java.nio.Buffer;

import java.util.HashMap;

import java.util.Scanner;

import org.omg.CORBA.Request;

public class TestFile {

public static void main(String[] args){
String path = "D:/xxx/ttt.txt";//指定文件所在的磁盘位置
File file = new File(path);
BufferedReader bReader = null;
try {
bReader = new BufferedReader(new FileReader(file));//把读取的文件存入缓存中
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
HashMap<String,Integer> word_2_num=new HashMap<String,Integer>();//定义一个map集合,
String tmp_line="";
try {
while ((tmp_line=bReader.readLine())!=null){
System.out.println(tmp_line);
String[] words = tmp_line.split(" ");//读取的文件存入string集合中
for (String word :words){
word=word.trim();  //遍历string集合中的数据,进行处理前后空格
int num=1;
if ( word_2_num.keySet().contains(word)){
num = num+word_2_num.get(word); //查询集合中相同的字符有多少个
}
word_2_num.put(word, num);//存入map集合中
}
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
for (String word:word_2_num.keySet()){

System.out.println("key:"+word + "  num:"+word_2_num.get(word));          //使用key获取value
}
}

}