(java)读取E盘中的文件到控制台并输出行号

import java.io.BufferedReader;

import java.io.File;

import java.io.FileReader;

import java.io.IOException;

public class ReadTes {

public static void main(String[] args) {

readFileByLines("E:\\read.txt");

}

public static void readFileByLines(String fileName) {

File file = new File(fileName);

BufferedReader reader = null;

try {

System.out.println("以行为单位读取文件内容，一次读一整行：");

reader = new BufferedReader(new FileReader(file));

String tempString = null;

int line = 1;

// 一次读入一行，直到读入null为文件结束

while ((tempString = reader.readLine()) != null) {

// 显示行号

System.out.println( line + ": " + tempString);

line++;

}

reader.close();

} catch (IOException e) {

e.printStackTrace();

} finally {

if (reader != null) {

try {

reader.close();

} catch (IOException e1) {

}

}

}

}

}