Java 文件读写

import java.io.*;
import java.math.*;

public class Main{
	public static void main(String[] args) throws Exception{
		//读取文件
		BufferedReader br =new BufferedReader(new FileReader("E:1.txt"));
		String line = "";
		while((line = br.readLine()) != null){
		    System.out.println(line);
                    int g=Integer.parseInt(line);//字符串转数字
		}
		br.close();
		int g=Integer.parseInt(line);
		//写文件
		BufferedWriter brout = new BufferedWriter(new FileWriter("E:2.txt"));
		brout.write("输出的内容");
		brout.flush(); //刷新缓冲区的数据到文件
		brout.close();
	}
}