黑马程序员--bufferedWriter

来源：互联网发布：正浩网络是干嘛的编辑：程序博客网时间：2024/06/14 04:37

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import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
*
* @author Administrator
*/
public class TestBufferedReader {
    public static void main(String[] args){
        FileReader in=null;
        BufferedReader read=null;
        String s=null;
        BufferedWriter writer=null;
        try {
            in = new FileReader("d:\\java\\TestLeap.java");
            read=new BufferedReader(in);
            writer=new BufferedWriter(new FileWriter("d:\\java\\leap.txt"));
            while ((s = read.readLine()) != null) {
               // System.out.println(s);
                writer.write(s);
                //这里调用newline（）方法是让它输出和读取的完全一致，理由不解释
                writer.newLine();
                //这里一定要调用flush（）方法，如果不调用，文件中将会显示不全或者压根就不显示任何东西，理由不解释，你肯定知道

                //上面一句先保留
                writer.flush();
            }
        } catch (FileNotFoundException ex) {
            System.out.println("找不到指定文件！！");
        }catch (IOException e) {
            System.out.println("文件读取有误！");
        }finally{
            try {
                writer.close();
                read.close();
            } catch (IOException ex) {
                System.out.println(ex.getMessage());
            }
        }
    }
}

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