java删除文本文件空行

复制代码 代码如下:

import java.io.BufferedInputStream;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileWriter;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

public class qukonghang {

private static String filename1;

private static String filename2;

public static void main(String[] args) {

filename1="file1";

filename2="file2";

File file=new File(filename1);

InputStream is=null;

BufferedReader br = null;

String tmp;

FileWriter writer=null;

int i=0;

try {

is=new BufferedInputStream(new FileInputStream(file));

br = new BufferedReader(new InputStreamReader(is, "utf-8"));

writer = new FileWriter(filename2, true);

while((tmp=br.readLine())!=null){

if(tmp.equals(""));

else{

writer.write(tmp+"n");

i++;

System.out.println(i);

}

}

writer.close();

is.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}