按行读取.txt文件，并按行写入到新文件中

package com.test.io;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
public class ReadWrite {

    public static void main(String[] args) {
        
        String inurl="D:/123.txt";
        File infile=new File(inurl);
        String outurl="D:/asd.txt";
        File outfile=new File(outurl);
        try {
            //如果写入的文件不存在创建新文件
            if(!outfile.exists()){
                outfile.createNewFile();
            }
            //文件的输入流读取文件
            FileInputStream in=new FileInputStream(infile);
            FileOutputStream out=new FileOutputStream(outfile);
            //读文件
            BufferedReader read=new BufferedReader(new InputStreamReader(in));
            //写文件
            BufferedWriter write=new BufferedWriter(new OutputStreamWriter(out));
            
            String temp="";
            
            while((temp=read.readLine())!=null){
                //写入文件
                write.write(temp+"
");
                System.out.println("写入"+temp);
            }
            read.close();
            write.close();
            out.close();
            in.close();
        } catch (Exception e) {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
        }
        
        
        
    }

}