Process Flow

First, the process flow

package cn.Buffered;
import java.io.BufferedReader;
import java.io.BufferedWriter;
/*
 * 字符缓冲流+新增方法(不能发生多态)
 */
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Reader;
import java.io.Writer;

public class Buffereds {
    public static void main(String[] args) throws IOException {
        File src=new File("C:/Users/Administrator/Desktop/sun/a.txt");
        File src2=new File("C:/Users/Administrator/Desktop/sun/b.txt");
        BufferedReader reader=null;
        BufferedWriter writer=null;
        try {
            reader=new BufferedReader(new FileReader(src));
            writer=new BufferedWriter(new FileWriter(src2,true));
            //3.读取操作
//            char[] s=new char[1024];
//            int len=0;
//            try {
//                while(-1!=(len=reader.read(s))) {
//                    String info=new String(s,0,len);
//                    System.out.println(info);
//                    writer.write(s, 0,len);
//                }
            String line=null;
            while(null!=(line=reader.readLine())) {
                writer.write(line);
//                writer.append("\r\n"); 
                writer.newLine(); //换行符
            }
            
            writer.flush();
            } catch (IOException e) {
                e.printStackTrace();
                System.out.println("文件读取失败");
            }
        } 
    

}

Second, converting streams: byte stream into a character stream processing distortion (code set decoded set) byte character encoding, decoding byte character

1. The encoding and decoding concept

　　Encoding: binary coded character set character ---

　　Decoding: --- decoding binary character set character

2. garbage problem

1) encoding and decoding character set is not uniform

2) lack of bytes, length is lost

Sample Code

Package cn.Buffered; 

Import java.io.UnsupportedEncodingException; 

public  class to Test01 {
     public  static  void main (String [] args) throws UnsupportedEncodingException { 
        String str2 = "Chinese" ;
         byte [] = Data str2.getBytes ();
         // Word incomplete section number 
        System.out.println ( new new String (Data, 0,3 )); 
                
//         Test01 (); 
    } 
    
    // encoding and decoding must be the same character set, otherwise distortion 
    public  static  void Test01 () throws{UnsupportedEncodingException
         // decode ---- char byte 
                String STR = "Chinese"; // GBK
                 // encoding ---- byte char 
                byte [] = Data str.getBytes ();
                 // encoding and decoding uniform character set; 
                System.out.println ( new new String (Data)); 
                
                byte [] = str.getBytes DATAS ( "UTF-. 8");   // set coded character set
                 // not uniform distortion 
                System.out.println ( new new String (DATAS)); 
                
                @ encoded 
                byte [] = DATA2 "Chinese" .getBytes ( "UTF-. 8");     // into byte code
                 //Decoding 
                STR = new new String (DATA2, "UTF-. 8");           // decode a string 
                System.out.println (STR); 
                
                
    } 
}

 

Commutations: Switch byte character
* 1, the output stream encoding OutputStreamWriter
* 2, decodes the input stream InputStreamReader

Package cn.Buffered; 

Import java.io.BufferedReader;
 Import java.io.File;
 Import a java.io.FileInputStream;
 Import java.io.FileNotFoundException;
 Import java.io.IOException;
 Import the java.io.InputStreamReader;
 Import Java. io.UnsupportedEncodingException; 

/ * 
 * commutations: Switch byte character 
 * 1, the output stream encoding OutputStreamWriter 
 * 2, decodes the input stream InputStreamReader 
 * 
 * / 
public  class CoverDemo {
     public  static  void main (String [] args) throws IOException {
         / /指定解码字符集
        BufferedReader br=new BufferedReader(
                new InputStreamReader(
                        new FileInputStream(
                                new File("C:/Users/Administrator/Desktop/sun/a.txt")),"UTF-8")
                    );
            String info =null;
            while(null!=(info=br.readLine())) {
                System.out.println(info);
            }
            br.close();
            
        
    }
}