File Download-springmvc Test

Directly modify the file path can be, others do not need to modify, Help class has been written for everyone, can be used directly

1, Scroller:

/** * Download File * @author Liupeng * @param request * @param response * @return * @throws Exception * * @RequestMapping (value= "/te Stfiledown ") Public String Testfiledown (httpservletrequest request,httpservletresponse response) throws exception{ Fileoperator.filedownload ("E:" +file.separator+ "tt.pdf", response); return null;}

2, Fileoperator:

Package Com.utcsoft.common.util;import Java.io.bufferedinputstream;import Java.io.bufferedwriter;import Java.io.file;import Java.io.fileinputstream;import Java.io.filenotfoundexception;import Java.io.FileOutputStream; Import Java.io.filewriter;import java.io.ioexception;import Java.io.inputstream;import Java.io.OutputStream;import Java.io.printwriter;import Java.net.urlencoder;import Java.util.properties;import Java.util.zip.ZipEntry;import Java.util.zip.zipoutputstream;import Javax.servlet.servletconfig;import Javax.servlet.servletexception;import Javax.servlet.http.httpservletrequest;import Javax.servlet.http.httpservletresponse;import Org.apache.commons.logging.log;import Org.apache.commons.logging.logfactory;import Com.utcsoft.common.servlet.log4jinitservlet;public class Fileoperator {Private final static Log logger = Logfactory.getlog (fileoperator.class);p ublic static String path = "C:";p ublic static int count = 0;public Fileoperator () { String tmp = GetClass (). GetResource ("/"). GetpaTh (); SYSTEM.OUT.PRINTLN (TMP);} public static String Getrootpath () {try{string proname = Log4jinitservlet.propertiespath; String tmp = System.getproperty ("User.dir");p ath = tmp.substring (0, Tmp.lastindexof (file.separator) + 1) + "bid" + file.se Parator;/*string osname = System.getproperties (). GetProperty ("Os.name"); if (Osname.tolowercase (). IndexOf ("Windows" ) = =-1) {path = "/home/bid/";} */inputstream in = new Bufferedinputstream (new FileInputStream (Proname)); Properties P = new properties ();p. Load (in),//p.containskey ("Path.file") if (!p.getproperty ("Path.file"). ToString (). Trim (). Equals ("")) {path = P.getproperty ("Path.file");}} catch (Exception ex) {Logger.error ("[Fileoperator]-Get file storage Path exception-" + Ex.getmessage ());} return path;} Transfer file stream to server public static void FileUpload (String filePath, httpservletrequest request) throws Servletexception, Ioexception{outputstream out = Null;inputstream ins = null;try {ins = Request.getinputstream (), out = new FileOutputStream ( FilePath); byte[] FileData = new byte[1024]; int readcount = 0; count = 0;while ((Readcount=ins.read (filedata,0,1024))! =-1) {out.write (filedata,0,readcount); count + = Readcount;} Out.flush (); Logger.info ("[FileUpload]-Read file size:" +count + "=======" + request.getclass () + ":" + FilePath);} catch (Exception ex) {ex.printstacktrace (); Logger.error ("[FileUpload]-" + ex + "=======" + Request.getclass ());} finally {out.close (); Ins.close ();}}  Transfer file stream to server public static string loadString (string path) throws IOException {StringBuffer buf = new StringBuffer ();  String line = null;  Java.io.File File = new Java.io.File (path); Java.io.InputStream in = null;  Java.io.OutputStream out = null;  Java.io.BufferedReader reader = null;  try {//get FileInputStream stream;  in = new Java.io.FileInputStream (file);  Get BufferedReader stream;  reader = new Java.io.BufferedReader (new Java.io.InputStreamReader (in));   Iterates through the rows and exits the loop if the read behavior is null;  while (line = Reader.readline ())! = null) {Buf.append (line). append ("\ n"); } catch (FilenotfoundexcEption e) {e.printstacktrace ();  } catch (IOException ex) {ex.printstacktrace ();  } finally {reader.close ();  In.close ();  } return buf.tostring (); }//Online save and write file public static void ReadFile (String path1, String path2) throws IOException {outputstream out = new FILEOUTPU TStream (path2); try {//create a file stream object FileInputStream is = new FileInputStream (path1);//sets the number of bytes read int n = 512;byte buffer[] = new B Yte[n];int readcount = 0; count = 0;//reads the input stream while ((readcount=is.read (buffer, 0, n))! =-1) {Out.write (Buffer,0,readcount) ; count + = Readcount;} Out.flush ();//Close input stream out.close (); Is.close ();} catch (IOException IoE) {}}//transfer file stream to client public static void FileDownload (String filePath, httpservletresponse response) Throws Servletexception, Ioexception{if ("". Equals (FilePath)) Return;outputstream out = Null;inputstream ins = null;try { String fileName = Stringoperator.getfilename (FilePath); File File = new file (filePath); Long filelength = File.length (); ins = new FileInputStream (filePath); out = Response.geToutputstream (); byte[] FileData = new Byte[1024];int readcount = 0; count = 0;//response.setheader ("Content-type", "appli Cation/octet-stream "), Response.setcontenttype (" Application/octet-stream "); Response.setheader (" Content-disposition "," attachment; Filename= "+urlencoder.encode (FileName," UTF-8 ")); Response.setheader (" Content-length ", string.valueof (Filelength) ); while ((Readcount=ins.read (filedata,0,1024))! =-1) {out.write (filedata,0,readcount); count + = Readcount;} Out.flush (); Response.flushbuffer (); Logger.info ("[FileDownload]-Write file size:" +count + "=======" + Response.getclass () + ":" + FilePath);} catch (Exception ex) {ex.printstacktrace (); Logger.error ("[FileDownload]-" + ex+ "=======" + Response.getclass ());} finally {out.close (); Ins.close ();} PrintWriter out1 = Response.getwriter ();//out.clear ();//out = Pagecontext.pushbody ();} File upload--Test passed public static Boolean Fileuploadex (String FilePath, String fileName, Long fileSize, InputStream InputStream) {Boolean flag = False;try{//filepath = Stringoperator.getencodestring (filePath);//filename = stringoperator.getencodestring (fileName); Logger.info ("[ Fileuploadex]-filepath= "+filepath+" filename= "+filename"; inputstream in = InputStream; File filed = new file (FilePath), if (!filed.exists ()) {filed.mkdirs ();} byte[] buffer = new byte[4096]; File OutFile = new file (FilePath + file.separator + fileName); FileOutputStream BOS = Null;bos = new Java.io.FileOutputStream (outFile); int Read;long YX = 0;while (read = in.read (buffer )! =-1) {YX = yx + read;bos.write (buffer, 0, read);} In.close (); Bos.flush (); Bos.close (); Logger.info ("[Fileuploadex]-File size:{" + FileSize + "}, read:{" + Yx + "}"); flag = true;} catch (Exception ex) {logger.error (ex);} return flag;}    public static void WriteFile (String filepath) {File File = new file (path); The file to be written bufferedwriter writer = null;try {if (!file.exists ()) File.createnewfile (); writer = new BufferedWriter (new FileWriter (file)); Writer.write ("111111111111111111111");} catch (IOException e) {e.printstAcktrace ();} finally {if (writer! = null) try {writer.close ();} catch (IOException e) {e.printstacktrace ();}}}  /** * Deletes the specified directory or file according to the path, regardless of whether it exists or not * @param spath the directory or file to be deleted * @return Delete succeeds returns True, otherwise false.  */public static Boolean DeleteFolder (String spath) {Boolean flag = false;  File File = new file (spath);  Determine if the directory or file exists if (!file.exists ()) {//does not exist returns false return flag;  } else {return deletedirectory (spath); }}/** * Delete a single file * @param spath The file name of the deleted files * @return A single file delete succeeds returns TRUE, otherwise false */public static Boolean DeleteFile (String spath)  {Boolean flag = false;  File File = new file (spath);  If the path is a file and is not empty, delete if (File.isfile () && file.exists ()) {file.delete ();  Flag = true;  } return flag; }/** * Delete directories (folders) and files under directory * @param spath The file path of the deleted directory * @return Directory Delete succeeded return true, otherwise false */public static Boolean de Letedirectory (String spath) {//If spath does not end with a file delimiter, automatically adds the file delimiter if (!spath.endswith (File.separator)) {spath = spath + file.se  Parator; } File Dirfile =New File (spath);  If the dir corresponding file does not exist, or is not a directory, exit if (!dirfile.exists () | | |!dirfile.isdirectory ()) {return false;  } Boolean flag = true;  Delete all files (including subdirectories) under folder file[] files = dirfile.listfiles (); for (int i = 0; i < files.length; i++) {//delete sub-file if (Files[i].isfile ()) {flag = DeleteFile (files[i].getabsolutepath  ());  if (!flag) break;  }//Delete sub-directory else {flag = DeleteDirectory (Files[i].getabsolutepath ());  if (!flag) break;  }} if (!flag) return false;  Delete current directory if (Dirfile.delete ()) {return true;  } else {return false;  }} public static void Main (string[] args) {path = "f:\\test";  Boolean result = Fileoperator.deletefolder (path);  SYSTEM.OUT.PRINTLN (result); }//You can first generate a zip file for all selected files and then download the zip file to enable bulk download of public static void Zipoutputstreamdemo (String zipspath,string SourceFile) throws Exception {byte[] buffer = new byte[1024];//The generated zip file is named demo.zipstring strzipname = "C:demo.zip"; Zipoutputstream out = new Zipoutputstream (new FileOutputStream (Strzipname));//Two files that need to be downloaded simultaneously result.txt, source.txtfile[] file1 = {new File ("C:\\test.pdf"), New file ("C:\\test11.pdf")};for (int i=0;i <file1.length;i++) {FileInputStream FIS = new FileInputStream (File1[i]); Out.putnextentry (new ZipEntry (File1[i]. GetName ())); int len;//reads the contents of the file to be downloaded, packages it into a zip file while ((len = fis.read (buffer)) >0) {out.write (Buffer,0,len);} Out.closeentry (); Fis.close ();} Out.close (); System.out.println ("Generate Demo.zip Success");}}

File Download-springmvc Test