原文: java统计文本中某个字符串出现的次数 源代码下载地址:http://www.zuidaima.com/share/1550463297014784.htm
统计文本中某个字符串出现的次数或字符串中指定元素出现的次数
文件样本:

程序查找的上此文件带"a"的字符在多少次
结果:

package com.zuidaima.util.string;
import java.io.*;
/**
* @author www.zuidaima.com
**/
public class CountString {
public static int count(String filename, String target)
throws FileNotFoundException, IOException {
FileReader fr = new FileReader(filename);
BufferedReader br = new BufferedReader(fr);
StringBuilder strb = new StringBuilder();
while (true) {
String line = br.readLine();
if (line == null) {
break;
}
strb.append(line);
}
String result = strb.toString();
int count = 0;
int index = 0;
while (true) {
index = result.indexOf(target, index + 1);
if (index > 0) {
count++;
} else {
break;
}
}
br.close();
return count;
}
public static void main(String[] args) {
try {
System.out.println(count("D:\\zuidaima.txt", "a"));
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
标签: java 字符串 统计 个数 文本话题: 脚本和工具 语言基础
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原文:http://blog.csdn.net/yaerfeng/article/details/38380011