学了点Java IO的小菜菜，写了个文字字频统计

简单通过，文件字符流，读写文件，HashMap记录文字个数，最后用缓存流写出。qaq

import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

public class TextTotal {
    public static void main(String[] args) {
        FileReader fr = null;
        BufferedWriter bw = null;
        try {
            Map<Character, Integer> map = new HashMap<>();
            fr = new FileReader("待统计文本.txt");
            int t = 0;
            while ((t = fr.read()) != -1) {
                char c = (char) t;
                if (map.get(c) == null) {
                    map.put(c, 1);
                } else {
                    map.put(c, map.get(c) + 1);
                }
            }
            bw = new BufferedWriter(new FileWriter("文字个数统计.txt"));
            for (Map.Entry<Character, Integer> entry : map.entrySet()) {
                bw.write(new String(entry.getKey() + "=" + entry.getValue()));
                bw.newLine();
            }

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (fr != null)
                    fr.close();
            } catch (IOException e) {
                e.printStackTrace();
            }

            try {
                if (bw != null)
                    bw.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}