FTP download file into input stream

/** * Take upload full file path * @param dir FTP defined storage path such as/jdyjs/jdyjs * @param filename uploaded file name * @return * @throws Exception */public St Atic string Getuploadfilepath (String dir, string filename) {byte[] bytes = NULL; Ydzf_uploadpdf ydzf_uploadpdf = new Ydzf_uploadpdf (); ftpclient ftp = new ftpclient (); Ydzf_uploadpdf.initftpserverparamsfromconfig (); String path = "/" +dir+ "/" +dir+ "/" +filename;try {int reply;ftp.connect (Ydzf_uploadpdf.getip (), Ydzf_uploadpdf.getport ());//Login Ftpftp.login (Ydzf_uploadpdf.getusername (), Ydzf_uploadpdf.getpassword ()); Ftp.setfiletype ( Ftpclient.binary_file_type); reply = Ftp.getreplycode (); if (! Ftpreply.ispositivecompletion (Reply)) {ftp.disconnect ();} Go to the specified download directory if (path! = null) {///verify if there is a folder, go to it, do not create and go to the directory under Ftp.changeworkingdirectory (path);//go to the specified directory}//2015/4/28 Does not need to traverse, instead directly uses the file name to take string remoteabsolutefile = Toftpfilename (path); InputStream in = null;//download file ftp.setbuffersize (1024); Ftp.setcontrolencoding ("UTF-8"); Ftp.setfiletype (ftp.binary_file_type); in = Ftp.retrievefilestream (remoteabsolutefile); bytes = Input2byte (in); System.out.println ("Download succeeded!" + bytes.length);//in.read (bytes); In.close ();} catch (SocketException e) {e.printstacktrace (),} catch (IOException e) {e.printstacktrace ();} catch (Exception e) {E.prin Tstacktrace ();} Return base64.encodebase64string (bytes);}

/**      * file to byte[] < A word function description > < function details > * *       @param instream      * @return      * @throws IOException      * @see [Class, Class # method, Class # member]      */public static byte[] Input2byte (InputStream instream) throws IOException { Bytearrayoutputstream Swapstream = new Bytearrayoutputstream (); byte[] buff = new byte[instream.available ()];int rc = 0;wh Ile (rc = instream.read (buff, 0,)) > 0) {swapstream.write (buff, 0, RC);} byte[] in2b = Swapstream.tobytearray (); Swapstream.close (); return in2b;} The/** conversion output is encoded */private static string Toftpfilename (String fileName) throws Exception {return new String (Filename.getbytes ( "GBK"), "iso8859-1");}

public class Ydzf_uploadpdf {private String ip;//FTP server ipprivate int port;private string username;private string password ;p rivate string path;private static final String ftpconfig = "Ftpconfiguration.xml";p ublic static final string Filedownloa Dtempdir = Servletactioncontext.getservletcontext (). Getrealpath ("/wenshu_pdf/");p ublic Void Initftpserverparamsfromconfig () {String Xmlpath = BaseAction.class.getClassLoader (). GetResource ("/"). GetPath () + Ftpconfig;if (Xmlpath.contains ("%20")) Xmlpath = Xmlpath.replaceall ("%20", ""); System.out.println (Xmlpath);D ocument doc = dom4jutils.file2document (Xmlpath); Element root = Doc.getrootelement (); This.ip = root.element ("IP"). GetText (); this.port = integer.valueof (Root.element (" Port "). GetText ()); this.username = Root.element (" username "). GetText (); This.password = root.element (" password "). GetText (); This.path = root.element ("path"). GetText ();

Ftpconfiguration.xml
About the configuration of FTP, you can find in Baidu very detailed FTP default port number is 21, you can not change
<?xml version= "1.0" encoding= "UTF-8"?><!--attachments uploaded FTP server configuration--><ftpconfig><ip>127.0.0.1</ Ip><port>21</port><username>ftpuser</username><password>12345678</password ><path>/ftpServer</path></ftpConfig>

FTP download file into input stream