Java创建一个text文本文件，并对其进行读写操作

package test;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class Test2 {

    public static void main(String[] args) throws IOException{
        String path = "e:\\test\\test\\test3.txt";
        File file = new File(path);
        if(!file.exists()){
            file.getParentFile().mkdirs();          
        }
        file.createNewFile();

        // write
        FileWriter fw = new FileWriter(file, true);
        BufferedWriter bw = new BufferedWriter(fw);
        bw.write("xxxaffdf");
        bw.flush();
        bw.close();
        fw.close();

        // read
        FileReader fr = new FileReader(file);
        BufferedReader br = new BufferedReader(fr);
        String str = br.readLine();
        System.out.println(str);
    }

}