java读取大txt文件_使用java读取txt里边的文件内容并获取大小（M）.txt

package com;

import java.io.File;

import java.io.*;

import java.io.FileInputStream;

import java.io.FileReader;

public class FileContent {

private String path = "D:\\下载说明.txt";

public FileContent() throws IOException

{

File f = new File(path);

FileReader fileReader = new FileReader(f);

BufferedReader br = new BufferedReader(fileReader);

String str;

while((str = br.readLine() ) != null)

{

System.out.println(str);

}

System.out.println(new FileInputStream(new File(path)).available() / 1024 / 1024 +"M");

}

public static void main(String[] args) {

try {

new FileContent();

} catch (IOException e) {

e.printStackTrace();

}

}

}