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StringDemo.java

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package Algorithm.StringAbout;

import com.sun.deploy.util.StringUtils;

import java.io.*;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

/**

* Created by panzhiwei on 2018/11/25.

*/

public class StringDemo {

/**

*

* 查找字符串中指定字符所在字串中的索引

*/

public static int getIndexOfStringArr(String value,String operator,int index){

//使用正则表达式

Matcher mat = Pattern.compile(operator).matcher(value);

int count = 0;

while(mat.find()){

count ++;

if(count == index){

break;

}

}

return mat.start();

}

public static void main(String[] args) throws Exception {

String str = "";

BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(new File(str))));

while (str != null){

try {

String line = br.readLine();

if(line != null){

int index = getIndexOfStringArr(str,"\"",7);

str = str.substring(index + 1);

if(str != "" && str != null){

//TODO:处理字符串指定元素

}

}

} catch (IOException e) {

e.printStackTrace();

}

}

}

}