java 取出文本文件中的空行

 1 import java.io.BufferedInputStream;
 2 import java.io.BufferedReader;
 3 import java.io.File;
 4 import java.io.FileInputStream;
 5 import java.io.FileWriter;
 6 import java.io.IOException;
 7 import java.io.InputStream;
 8 import java.io.InputStreamReader;
 9 
10 public class qukonghang {
11     private static String filename1;
12     private static String filename2;
13     public static void main(String[] args) {
14         filename1="file1";
15         filename2="file2";
16         File file=new File(filename1);
17         InputStream is=null;
18         BufferedReader br = null;
19         String tmp;
20         FileWriter writer=null;
21         int i=0;
22         try {
23             is=new BufferedInputStream(new FileInputStream(file));
24             br = new BufferedReader(new InputStreamReader(is, "utf-8"));
25             writer = new FileWriter(filename2, true);
26             while((tmp=br.readLine())!=null){
27                 if(tmp.equals(""));
28                 else{
29                     writer.write(tmp+"
");
30                     i++;
31                     System.out.println(i);
32                 }
33             }
34             writer.close();
35             is.close();
36         } catch (IOException e) {
37             e.printStackTrace();
38         }
39     }
40 }