Java implements local FileCopy

Objective:

Java streaming is an important content, the basic file read and write and copy knowledge point is a lot of interviews. Therefore, this paper makes a simple test summary.

2. Figure shows "text io/binary io"(this is a summary of the reference from the Web, quite classic, easy to compare memory)

3. Text copy of the experimental Java Implementation code:

1  PackageCom.gdufe.io;2 3 ImportJava.io.BufferedInputStream;4 ImportJava.io.BufferedOutputStream;5 ImportJava.io.DataInputStream;6 ImportJava.io.DataOutputStream;7 ImportJava.io.FileInputStream;8 ImportJava.io.FileOutputStream;9 Importjava.io.IOException;Ten ImportJava.io.InputStream; One ImportJava.io.OutputStream; A  -  Public classTestinputoutputstream { -  the //private final static String source= "T.txt"; - //private final static String target= "Tt.txt"; - //private final static String source= "P.png"; - //private final static String target= "Pp.png"; +     Private Final StaticString source= "D:\\tool_software\\mysql-installer-community-5.6.23.0.msi"; -     Private Final StaticString target= "Mysql-installer-community-5.6.23.0.msi"; +     //D:\Tool_Software\Ryuyan.zip A      at      -      Public Static voidMain (string[] args) { - //testinputoutputstream.copy1 (SOURCE, TARGET); - //testinputoutputstream.copy2 (SOURCE, TARGET); - testinputoutputstream.copy3 (SOURCE, TARGET); -System.out.println ("--end---"); in     } -      to      Public Static voidcopy1 (String src,string tar) { +          -InputStream input =NULL; theOutputStream output =NULL; *         Try{ $input =NewFileInputStream (SRC);Panax NotoginsengOutput =NewFileOutputStream (TAR); -             intR; the              while((R=input.read ())!=-1){ +Output.write ((byte) r); A             } the}Catch(Exception e) { + e.printstacktrace (); -}finally{ $             Try { $ input.close (); - output.close (); -}Catch(IOException e) { the e.printstacktrace (); -             }Wuyi         } the          -     } Wu      Public Static voidcopy2 (String src,string tar) { -InputStream input =NULL; AboutOutputStream output =NULL; $         Try{ -input =NewFileInputStream (SRC); -Output =NewFileOutputStream (TAR); -             intLength=0; A             byte[]B =New byte[1024]; +              while((Length=input.read (b))!=-1){ theOutput.write (b,0, length); -             } $}Catch(Exception e) { the e.printstacktrace (); the}finally{ the             Try { the input.close (); - output.close (); in}Catch(IOException e) { the e.printstacktrace (); the             } About         } the     } the      the      Public Static voidcopy3 (String src,string tar) { +InputStream input =NULL; -OutputStream output =NULL; the         Try{Bayiinput =NewDataInputStream (NewBufferedinputstream (NewFileInputStream (SRC))); theOutput =NewDataOutputStream (NewBufferedoutputstream (NewFileOutputStream (TAR))); the             /*** After the pro-test, buffer buffered stream reads really faster some * * **/ -              -             intLength=0; the             byte[]B =New byte[1024];//first read the stream into a byte array the              while((Length=input.read (b))!=-1){ theOutput.write (b,0, length); the             } -}Catch(Exception e) { the e.printstacktrace (); the}finally{ the             Try {94 input.close (); the output.close (); the}Catch(IOException e) { the e.printstacktrace ();98             } About         } -     }101}

(Attached: The reference code when the attention to prepare the test file, otherwise the exception "file can ' t be found"!)

Copy files to the direct directory of the Java Project, refresh project to view!

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Java implements local FileCopy