putstream

Stream class libraryInheritance relationshipThere are more input streams and output streams in Java, we generally only need to master 17 kinds offileinputstream//file byte output streamfileoutputstream//file byte output streamFileReader//file character input streamFileWriter//file character output streambufferedreader//Cache character Input streambufferedwriter//Cache Character Output streambufferedinputstream//Cache byte Input streambufferedoutputstream//Cache byte output streamdatainputstream

Java input/output streamPre-knowledge preparation1. Basic Java SyntaxBasic principle:While the program is running, it may be necessary to read the required data from an external storage medium or other program, which requires the use of an input stream object. The input stream points to the source called it, and the program reads the source data from the input stream that points to the source. On the other hand, after processing the data, the program may need to write processing results to a per

In/outputstream processing byte reader/out processing charactersIn/out Putstream can read: Byte numbers, string strings, files, network? In/out Putstream is an abstract classegFileOutputStream ops=new FileOutputStream ();.......Ops.close.egDataOutputStream out=new DataOutputStream (New FileOutputStream ("E:\\demo\\abc2.txt)");Out.write ();OUT.WITEUTF ("China");Out.flush ();Out.close ();Java serialization te

the header tag is in use, some browsers will directly recognize it as a string display. response.setheader ( "Content-type" "Text/html;charset=utf-8" response.getOut Putstream (). Write ( " Chinese garbled " .getbytes ( "UTF-8" directly set the value within the label Response.setcontenttype (); è recommended use of response.setcontenttype (" Text/html;charset=utf-8 " response.getOut

Concept of Flow:1. An in Putstream that operates on a byte. out Putstream class　　 in is the reading data, out is the output data, the number is easy to confuse.The most common subclasses of InputStream and OutputStreamFileInputStream and FileOutputStream working with byte dataDataInputStream can be used in binary operation2. Reader.writer class for string manipulationReader.writer subclasses Bufferedreader.

=httpurlconnection.getin Putstream (); Byte Data[]=streamtools.istodata (IS); Converts a string content=new string (data); Content encoding mode if (Content.contains ("gb2312")) {content=new String (data, "gb2312"); }//Disconnect httpurlconnection.disconnect (); }catch (Exception e) {e.printstacktrace (); } return content; } public StatiC Bitmap sendgets (String path) {Bitmap bitmap=null; try{//Set access URL URL url=new url (p

IOException30 */31 private void Downloadfilebyoutputstream (Httpser Vletresponse response) 32 Throws FileNotFoundException, IOException {33//1. Gets the absolute path of the file to download. String Realpath = THIS.GETSERVL Etcontext (). Getrealpath ("/download/1.jpg"); 35//2. Gets the filename to download. String filename = realpath.substring (realpat H.lastindexof ("\ \") +1); 37//3. Setting the Content-disposition response header to control the browser to download the form of open

(Httpser Vletresponse response) 32 Throws FileNotFoundException, IOException {33//1. Gets the absolute path of the file to download. String Realpath = THIS.GETSERVL Etcontext (). Getrealpath ("/download/1.jpg"); 35//2. Gets the filename to download. String filename = realpath.substring (realpat H.lastindexof ("\ \") +1); 37//3. Setting the Content-disposition response header to control the browser to download the form of open file Response.setheader ("Content-dispos Ition "," attachm

); Putstream (Memstream, RemotePath); return true; } catch (Exception ex) {return false; }} public bool Putstream (System.IO.Stream LocalFile, string remotepath) {try {Tamir.SharpSsh.java.String DST = new Tamir.SharpSsh.java.String (RemotePath); M_sftp.put (New Tamir.Streams.InputStreamWrapper (LocalFile), DST, 1);

(Httpser Vletresponse response) 32 Throws FileNotFoundException, IOException {33//1. Gets the absolute path of the file to download. String Realpath = THIS.GETSERVL Etcontext (). Getrealpath ("/download/1.jpg"); 35//2. Gets the filename to download. String filename = realpath.substring (realpat H.lastindexof ("\ \") +1); 37//3. Setting the Content-disposition response header to control the browser to download the form of open file Response.setheader ("Content-dispos Ition "," attachm

(Httpser Vletresponse response) 32 Throws FileNotFoundException, IOException {33//1. Gets the absolute path of the file to download. String Realpath = THIS.GETSERVL Etcontext (). Getrealpath ("/download/1.jpg"); 35//2. Gets the filename to download. String filename = realpath.substring (realpat H.lastindexof ("\ \") +1); 37//3. Setting the Content-disposition response header to control the browser to download the form of open file Response.setheader ("Content-dispos Ition "," attachm

IOException30 */31 private void Downloadfilebyoutputstream (Httpser Vletresponse response) 32 Throws FileNotFoundException, IOException {33//1. Gets the absolute path of the file to download. String Realpath = THIS.GETSERVL Etcontext (). Getrealpath ("/download/1.jpg"); 35//2. Gets the filename to download. String filename = realpath.substring (realpat H.lastindexof ("\ \") +1); 37//3. Setting the Content-disposition response header to control the browser to download the form of open

{Gzipoutputstream Gos = newgzipoutputstream (OS); int count; byte data[] = Newbyte[buffer_length]; while ((count = Is.read (data, 0,buffer_length))! =-1) {gos.write (data, 0, count); } gos.finish (); Gos.flush (); Gos.close (); /** * Data Uncompressed * * @param is * @param os * @throws Exception */public static void Decompress (Inputstreamis, OutputStream os) throws Exception {Gzipinputstream GIS = Newgzipin

have been cracked! Able to execute the su command.1. Create a method: the code is as follows: Package CN. ycmoon. utility; import Java. io. dataoutputstream; import android. app. activity; import android. util. log; public class systemmanager extends activity {/*** the application program run command to obtain the root permission. The device must have cracked (get the root permission) * @ Param command: string apkroot = "chmod 777" + getpackagecodepath (); rootcommand (apkroot); * @ return appl

* @ author linshutao **/public class doc2htmlutil {log = logfactory. getlog (getclass (); Private Static doc2htmlutil doc2htmlutil;/*** get doc2htmlutil instance **/public static synchronized doc2htmlutil Merge () {If (doc2htmlutil = NULL) {doc2htmlutil = new doc2htmlutil ();} return doc2htmlutil;}/*** conversion file * @ Param fromfileinputstream: **/Public String doc2html (in Putstream fromfileinputstream, file tofilefolder) {string soffice_host =

(this. getfileextname (filedownloadname, false ));Filecontenttype = fileextkey. getvalue ("content type", default_content_type). tostring ();}Catch{Filecontenttype = default_content_type;}Return filecontenttype;} Public String ftpupload (httppostedfile file, string DIR){String filedownloadname = datetime. Now. tostring ("yyyymmddhhmmss") + this. getfileextname (file. filename, true );Ftpconnection FTP = This. ftpconn ();If (ftp. directoryexist (DIR ))FTP. setcurrentdirectory (DIR );Else{FTP. cr

= URI. parse ("Content: // MMS/part /"+ Partid ); Bytearrayoutputstream baos =NewBytearrayoutputstream (); Inputstream is =Null; Try{ Is = getcontentresolver (). openinputstream (parturi ); Byte[] Buffer =NewByte[256]; IntLen = is. Read (buffer ); While(LEN> =0) { Baos. Write (buffer,0, Len ); Len = is. Read (buffer ); } }Catch(Ioexception e ){ }Finally{ If(Is! =Null){ Try{ Is. Close (); }Catch(Ioexception e ){ } } } } String selection = new string ("mid = '" + key +

1.What is stream?Drain a very image of the concept, when the program needs to read the data, it will open a stream to the data source, the data source can be a file, memory, or network connection. Similarly, when a program needs to write data, it opens a stream to the destination.In Java, the part of Io is large and consists of two main parts: byte stream and character stream. Concrete structure such as (image from the Internet):2: What is a byte stream?A stream that is transmitted in bytes. The

file (des); FileOutputStream bw = null; try {fr = new FileInputStream (file); bw = new FileOut PutStream (desFile); // bufferbyte [] B = new byte [512]; while (fr. read (B )! =-1) {bw. write (B);} bw. flush (); flag = true;} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke. printStackTrace ();} catch (IOException e) {// TODO Auto-generated catch blocke. printStackTrace ();} finally {if (fr! = Null) try {fr. close ();} catch (IOExc

(); GZIPOutputStream zos; BufferedInputStream bis = new BufferedInputStream (new ByteArrayInputStream (data )); byte [] buf = new byte [512]; int len; try {zos = new GZIPOut PutStream (out); while (len = bis. read (buf ))! =-1) {zos. write (buf, 0, len); zos. flush ();} bis. close (); zos. close (); return out. toByteArray ();} finally {if (out! = Null) {try {out. close ();} catch (Exception e2) {}}}/*** Gzip decompression * @ param B * @ return */pu