统计某字符串在文件中出现的次数

package constxiong.interview;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * 统计某字符串在文件中出现的次数
 * 
 * @author ConstXiong
 */
public class TestCountWord {

    public static void main(String[] args) {
        String filePath = "/Users/handsome/Desktop/a.txt";
        String word = "ConstXiong";
        System.out.println(countWordAppearTimes(filePath, word));
    }
    
    /**
     * 统计每行的出现单词的出现次数之后
     * @param filePath
     * @param word
     * @return
     */
    public static int countWordAppearTimes(String filePath, String word) {
        int times = 0;
        FileReader fr = null;
        BufferedReader br = null;
        try {
            fr = new FileReader(filePath);
            br = new BufferedReader(fr);
            String line;
            while ((line = br.readLine()) != null) {//读文件每行字符串
                //按照单词正则查找出现次数
                Pattern p = Pattern.compile(word);
                Matcher m = p.matcher(line);
                while (m.find()) {
                    times++;
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (fr != null) {
                try {
                    fr.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (br != null) {
                try {
                    br.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return times;
    }

}