import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.InputStreamReader;
public class T {
public static void main(String[] args) throws Exception{
long startTime=System.currentTimeMillis(); //获取开始时间
FileInputStream filestream=new FileInputStream("src/jedis/1.txt");
byte[] b = new byte[3];
filestream.read(b);
String ecode="gbk";
if (b[0] == -17 && b[1] == -69 && b[2] == -65){
ecode="utf-8";
}
InputStreamReader readStream=new InputStreamReader(filestream,ecode);
BufferedReader reader=new BufferedReader(readStream);
String temp=null;
int line=0;//行号
while((temp=reader.readLine())!=null){
line++;
System.out.println(line+":"+temp);
}
long endTime=System.currentTimeMillis(); //获取结束时间
if(readStream!=null){
readStream.close();
}
if(reader!=null){
reader.close();
}
System.out.println("程序运行时间: "+(endTime-startTime)/1000+"s");
}
}
java读取按行txt文件
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