import java.io.*;
 
public class Demo4 {
    public static void main(String[] args) {
        /**
         * 緩沖字節(jié)輸入流（BufferedInputStream）
         * 特點(diǎn)：提高效率
         */
        File file = new File("C:\\JAVA_API_1.7中文.chm");
        BufferedInputStream bufferedInputStream = null;//創(chuàng)建緩沖字節(jié)流
        FileInputStream fileInputStream = null;
        long stare = System.currentTimeMillis();//獲得當(dāng)前流開始時(shí)的毫秒值
        try {
            fileInputStream=new FileInputStream(file);
            bufferedInputStream = new BufferedInputStream(fileInputStream);//將文件字節(jié)流包裝成緩沖字節(jié)流
            byte by[] = new byte[1024];//緩沖區(qū)字節(jié)數(shù)組（這個(gè)緩沖區(qū)與Buffered不同）
            while ((bufferedInputStream.read(by))!=-1){//使用緩沖字節(jié)流讀取數(shù)據(jù)
 
            }
            long end = System.currentTimeMillis();//獲得當(dāng)前流結(jié)束時(shí)的毫秒值
            System.out.println("運(yùn)行經(jīng)歷的毫秒數(shù)："+(end - stare));
 
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (fileInputStream!=null){
                try {
                    fileInputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (bufferedInputStream!=null){
                try {
                    bufferedInputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        
        
        /**
         * 緩沖字節(jié)輸出流（BufferedOutputStream）
         * 特點(diǎn)：提高效率
         */
        File file1 = new File("C:\\Word.txt");
        BufferedOutputStream bufferedOutputStream = null;//創(chuàng)建緩沖字節(jié)輸出流
        FileOutputStream fileOutputStream = null;
        try {
            fileOutputStream=new FileOutputStream(file1);
            bufferedOutputStream=new BufferedOutputStream(fileOutputStream);//將文件輸出流包裝到緩沖字節(jié)輸出流
 
            String str = "深山踏紅葉，耳畔聞鷺鳴。";
            byte by[] = str.getBytes();
            bufferedOutputStream.write(by);
            //<*> 使用緩沖字節(jié)輸出流時(shí)，要多進(jìn)行刷新操作，避免等待，有數(shù)據(jù)時(shí)就將數(shù)據(jù)寫入文件當(dāng)中 <*>
            bufferedOutputStream.flush();//刷新（強(qiáng)制將緩沖區(qū)數(shù)據(jù)寫入文件中，即使緩沖區(qū)沒有寫滿）
 
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (fileOutputStream!=null){
                try {
                    fileOutputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (bufferedOutputStream!=null){
                try {
                    bufferedOutputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}

import java.io.*;
 
public class Demo6 {
    public static void main(String[] args) {
        File file = new File("C:\\Word.txt");
 
        /**
         * 文件緩沖字符輸出流（BufferedWriter）
         */
        FileWriter fileWriter = null;//創(chuàng)建文件字符輸出流
        BufferedWriter bufferedWriter = null;//創(chuàng)建文件緩沖字符輸出流
 
        try {
            fileWriter = new FileWriter(file);
            bufferedWriter = new BufferedWriter(fileWriter);//將文件字符輸出流包裝成文件緩沖字符輸出流
 
            String str1 = "神里";
            String str2 = "綾華";
 
            bufferedWriter.write(str1);//第一行數(shù)據(jù)
            bufferedWriter.newLine();//創(chuàng)建一個(gè)新行
            bufferedWriter.write(str2);//第二行數(shù)據(jù)
 
        } catch (IOException e) {
            e.printStackTrace();
        }finally {//<*> 注意：流的關(guān)閉順序，先創(chuàng)建的后關(guān)閉。 <*>
            if (bufferedWriter!=null){
                try {
                    bufferedWriter.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (fileWriter!=null){
                try {
                    fileWriter.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
 
 
        /**
         * 文件緩沖字符輸入流（BufferedReader）
         */
        FileReader fileReader = null;
        BufferedReader bufferedReader = null;
        try {
            fileReader = new FileReader(file);
            bufferedReader = new BufferedReader(fileReader);//將文件字符輸入流包裝成文件緩沖字符輸入流
            String tmp = null;//臨時(shí)變量
            int i = 1;//計(jì)數(shù)器
            while ((tmp = bufferedReader.readLine())!=null){//循環(huán)讀取文件中的內(nèi)容
                System.out.println("第"+i+"行："+tmp);
                i++;
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (bufferedReader!=null){
                try {
                    bufferedReader.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (fileReader!=null){
                try {
                    fileReader.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}