First, Javase (21) character stream, Io flow summary, case

1: Character Stream (mastering)

(1) Byte stream operation Chinese data is not particularly convenient, so there is a conversion stream.

The function of the conversion stream is to use the byte stream to convert the character stream.

(2) The conversion stream is actually a character stream

Character stream = byte stream + encoding table

(3) Coding table

A: A table consisting of characters and corresponding values

B: Common Coding tables

Ascii

Iso-8859-1

GB2312

GBK

GB18030

UTF-8

C: Encoding issues in strings

Coding

String--byte[]

Decoding

Byte[]--string

(4) Coding problems in IO stream

A:outputstreamwriter

OutputStreamWriter (outputstream OS): Default encoding, GBK

OutputStreamWriter (OutputStream OS, String CharSet): Specifying encoding

B:inputstreamreader

InputStreamReader (InputStreamReader is): Default encoding, GBK

InputStreamReader (InputStreamReader is,string CharSet): Specify encoding

C: The coding problem is actually very simple

As long as the code is consistent

(5) Character stream

Reader

|--inputstreamreader

|--filerreader

|--bufferedreader

Writer

|--OutputStreamWriter

|--filewriter

|--bufferedwriter

(6) Copy the text file (5 ways)

2:io Flow Summary (master)

IO stream

|--Byte stream

|--byte input stream

InputStream

int read (): reads one byte at a time

int read (byte[] bys): reads one byte array at a time

|--fileinputstream

|--bufferedinputstream

|--byte output stream

OutputStream

void write (int by): Write one byte at a time

void Write (byte[] bys,int. index, int len): Write one part of a byte array at a time

|--fileoutputstream

|--bufferedoutputstream

|--character Stream

|--character input stream

Reader

int read (): read one character at a time

int read (char[] CHS) reads one character array at a time

|--inputstreamreader

|--filereader

1--bufferedreader

String ReadLine (); read one string at a time

|--character output stream

Writer

void write (int ch): Write one character at a time

void Write (Char[]cha, int index,int1en): writes one part of a character array at a time

|--outputstreamwriter

|--filewriter

|--bufferedwriter

void newline (): Write a line break

void write (string line): Write one string at a time

3: Case study (comprehension exercise once again)

A: Copy A text file 5 ways (Master)

B: Copy Picture (binary stream data) 4 ways (Master)

C: Store the data in the collection into a text file

D: Reading data from a text file into a set merge traversal collection

E: Copy single-level

F: Copy the file specified in the single-level folder and modify the name

Review the bulk modification name

G: Copy Multilevel folders

H: Keyboard entry Student information stored in a text file from high to low score

I: Sort the strings in a file and output them to another text file

J: Using reader to simulate the unique functions of BufferedReader

K: Unique features of analog LineNumberReader

First, Javase (21) character stream, Io flow summary, case