commons-net实现ftp帮助文档api资源-CSDN下载

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commons-net

帮助文档

ftp下载

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Apache Commons Net库是一个Java库，专门用于处理各种网络协议，其中FTP（文件传输协议）是其核心功能之一。本帮助文档API将详细解释如何利用这个库来实现FTP相关的操作。 FTP（File Transfer Protocol）是一种标准的网络协议，用于在计算机之间进行文件传输。Apache Commons Net提供了丰富的类和方法，使得开发者可以方便地执行FTP任务，如上传、下载文件，创建、删除目录，以及管理文件权限等。 **FTPClient类** 是这个库中的核心，它实现了FTP协议的大部分功能。你需要创建一个FTPClient实例，并通过`connect()`方法连接到FTP服务器。连接参数通常包括服务器地址和端口号，例如： ```java FTPClient client = new FTPClient(); client.connect("ftp.example.com", 21); ``` 连接成功后，使用`login()`方法登录FTP服务器，提供用户名和密码： ```java client.login("username", "password"); ``` **文件传输** 可以通过`retrieveFile()`或`storeFile()`方法实现。例如，下载远程文件： ```java OutputStream out = new FileOutputStream("localfile.txt"); client.retrieveFile("remotefile.txt", out); out.close(); ``` 上传文件则反向操作： ```java InputStream in = new FileInputStream("localfile.txt"); client.storeFile("remotefile.txt", in); in.close(); ``` **目录操作** 包括创建、删除和改变当前工作目录。`makeDirectory()`用于创建目录，`removeDirectory()`用于删除，`changeWorkingDirectory()`用于切换当前目录： ```java client.makeDirectory("newdir"); client.changeWorkingDirectory("newdir"); client.removeDirectory("olddir"); ``` **FTP模式** 有ASCII和二进制两种，通过`setFileType()`方法设置。ASCII模式适用于文本文件，二进制模式适用于所有其他类型的数据： ```java client.setFileType(FTP.ASCII_FILE_TYPE); // 设置为ASCII模式 client.setFileType(FTP.BINARY_FILE_TYPE); // 设置为二进制模式 ``` **被动模式** 在防火墙或NAT环境中很有用，通过`enterLocalPassiveMode()`启用： ```java client.enterLocalPassiveMode(); ``` **断开连接** 和清理资源是必要的： ```java client.logout(); client.disconnect(); ``` **异常处理** 也是关键部分，因为FTP操作可能会抛出IOException，需要适当地捕获和处理： ```java try { // FTP操作 } catch (IOException e) { e.printStackTrace(); } ``` Apache Commons Net还提供了其他高级功能，如FTPSSLClient支持安全的FTP over SSL/TLS，以及FTPESClient支持 Explicit SSL/TLS。这些类可以提供额外的安全性，以保护数据在传输过程中的安全。此外，`FTPFile`接口代表了FTP服务器上的文件或目录，提供了获取文件大小、修改时间等属性的方法。`FTPListParseEngine`可以解析服务器的目录列表，用于遍历远程目录。 Apache Commons Net提供的FTP API是Java开发者进行FTP编程的强大工具，它简化了与FTP服务器的交互，让文件传输变得简单而可靠。通过阅读和理解这个帮助文档，开发者可以更有效地利用这个库来实现各种FTP功能。

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commons-net实现ftp帮助文档 api （572个子文件）

stylesheet.css 11KB

titlebar.gif 10KB

background.gif 2KB

titlebar_end.gif 849B

tab.gif 291B

index-all.html 855KB

FTPClient.html 388KB

FTPClient.html 304KB

constant-values.html 199KB

NNTPClient.html 190KB

FTP.html 185KB

FTP.html 184KB

NNTPClient.html 177KB

FTPSClient.html 114KB

NNTP.html 110KB

NNTP.html 104KB

Base64.html 102KB

SocketClient.html 91KB

SocketClient.html 81KB

FTPSClient.html 80KB

SMTP.html 78KB

FTPCommand.html 71KB

SMTPClient.html 70KB

IMAPClient.html 67KB

SMTPClient.html 63KB

FTPCmd.html 62KB

FTPClientConfig.html 61KB

TFTPClient.html 61KB

FTPClientConfig.html 59KB

NtpV3Impl.html 58KB

POP3Client.html 57KB

FTPHTTPClient.html 56KB

FTPReply.html 55KB

RCommandClient.html 55KB

NtpV3Impl.html 54KB

POP3Client.html 53KB

IMAPClient.STATUS_DATA_ITEMS.html 53KB

IMAPClient.html 53KB

IMAPClient.SEARCH_CRITERIA.html 53KB

IMAPClient.FETCH_ITEM_NAMES.html 53KB

TelnetClient.html 51KB

MVSFTPEntryParser.html 49KB

IMAPSClient.html 49KB

NtpV3Packet.html 49KB

AuthenticatingSMTPClient.html 49KB

TFTPClient.html 48KB

SMTPSClient.html 48KB

overview-tree.html 47KB

FTPFile.html 47KB

Base64.html 46KB

POP3SClient.html 45KB

AuthenticatingIMAPClient.html 45KB

NNTPReply.html 45KB

Threader.html 44KB

IMAPClient.SEARCH_CRITERIA.html 44KB

IMAP.html 44KB

POP3.html 43KB

TelnetOption.html 43KB

TimeStamp.html 43KB

TimeStamp.html 42KB

RCommandClient.html 42KB

FTPFile.html 39KB

Util.html 38KB

TelnetClient.html 38KB

Util.html 38KB

RExecClient.html 38KB

TFTP.html 37KB

Article.html 36KB

DatagramSocketClient.html 35KB

DefaultSocketFactory.html 34KB

IMAP.IMAPState.html 34KB

IMAP.html 34KB

AuthenticatingSMTPClient.AUTH_METHOD.html 33KB

AuthenticatingSMTPClient.html 33KB

POP3.html 33KB

IMAPCommand.html 32KB

FTPSSocketFactory.html 32KB

SocketClient.html 32KB

SMTPReply.html 32KB

RLoginClient.html 31KB

SubnetUtils.html 31KB

SubnetUtils.SubnetInfo.html 31KB

FingerClient.html 31KB

POP3SClient.html 31KB

FTPListParseEngine.html 30KB

UnixFTPEntryParser.html 30KB

SMTPCommand.html 30KB

ExtendedPOP3Client.html 30KB

FTPTimestampParserImpl.html 30KB

IMAPSClient.html 30KB

SMTPSClient.html 30KB

TelnetCommand.html 30KB

TFTP.html 29KB

FTPTimestampParserImpl.html 29KB

DatagramSocketClient.html 29KB

DefaultFTPFileEntryParserFactory.html 29KB

TimeInfo.html 29KB

RExecClient.html 29KB

VMSFTPEntryParser.html 29KB

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">  <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html" charset="iso-8859-1"> <title>Index (Commons Net 3.3 API)</title> <link rel="stylesheet" type="text/css" href="./stylesheet.css" title="Style"> </head> <body> <script type="text/javascript"> </script> <noscript> <div>JavaScript is disabled on your browser.</div> </noscript>  <div class="topNav"><a name="navbar_top">  </a><a href="#skip-navbar_top" title="Skip navigation links"></a><a name="navbar_top_firstrow">  </a> <ul class="navList" title="Navigation"> <li><a href="./overview-summary.html">Overview</a></li> <li>Package</li> <li>Class</li> <li>Use</li> <li><a href="./overview-tree.html">Tree</a></li> <li><a href="./deprecated-list.html">Deprecated</a></li> <li class="navBarCell1Rev">Index</li> <li><a href="./help-doc.html">Help</a></li> </ul> </div> <div class="subNav"> <ul class="navList"> <li>Prev</li> <li>Next</li> </ul> <ul class="navList"> <li><a href="./index.html?index-all.html" target="_top">Frames</a></li> <li><a href="index-all.html" target="_top">No Frames</a></li> </ul> <ul class="navList" id="allclasses_navbar_top"> <li><a href="./allclasses-noframe.html">All Classes</a></li> </ul> <div> <script type="text/javascript"> </script> </div> <a name="skip-navbar_top">  </a></div>  <div class="contentContainer"><a href="#_A_">A</a> <a href="#_B_">B</a> <a href="#_C_">C</a> <a href="#_D_">D</a> <a href="#_E_">E</a> <a href="#_F_">F</a> <a href="#_G_">G</a> <a href="#_H_">H</a> <a href="#_I_">I</a> <a href="#_K_">K</a> <a href="#_L_">L</a> <a href="#_M_">M</a> <a href="#_N_">N</a> <a href="#_O_">O</a> <a href="#_P_">P</a> <a href="#_Q_">Q</a> <a href="#_R_">R</a> <a href="#_S_">S</a> <a href="#_T_">T</a> <a href="#_U_">U</a> <a href="#_V_">V</a> <a href="#_W_">W</a> <a href="#_X_">X</a> <a href="#___">_</a> <a name="_A_">  </a> <h2 class="title">A</h2> <dl> <dt><span class="strong"><a href="./org/apache/commons/net/ftp/FTP.html#abor()">abor()</a></span> - Method in class org.apache.commons.net.ftp.<a href="./org/apache/commons/net/ftp/FTP.html" title="class in org.apache.commons.net.ftp">FTP</a></dt> <dd> <div class="block">A convenience method to send the FTP ABOR command to the server, receive the reply, and return the reply code.</div> </dd> <dt><span class="strong"><a href="./org/apache/commons/net/ftp/FTPCommand.html#ABOR">ABOR</a></span> - Static variable in class org.apache.commons.net.ftp.<a href="./org/apache/commons/net/ftp/FTPCommand.html" title="class in org.apache.commons.net.ftp">FTPCommand</a></dt> <dd> <div class="block"><span class="strong">Deprecated.</span></div>  </dd> <dt><span class="strong"><a href="./org/apache/commons/net/ftp/FTPClient.html#abort()">abort()</a></span> - Method in class org.apache.commons.net.ftp.<a href="./org/apache/commons/net/ftp/FTPClient.html" title="class in org.apache.commons.net.ftp">FTPClient</a></dt> <dd> <div class="block">Abort a transfer in progress.</div> </dd> <dt><span class="strong"><a href="./org/apache/commons/net/ftp/FTPCmd.html#ABORT">ABORT</a></span> - Static variable in enum org.apache.commons.net.ftp.<a href="./org/apache/commons/net/ftp/FTPCmd.html" title="enum in org.apache.commons.net.ftp">FTPCmd</a></dt> <dd> </dd> <dt><span class="strong"><a href="./org/apache/commons/net/ftp/FTPCommand.html#ABORT">ABORT</a></span> - Static variable in class org.apache.commons.net.ftp.<a href="./org/apache/commons/net/ftp/FTPCommand.html" title="class in org.apache.commons.net.ftp">FTPCommand</a></dt> <dd> <div class="block"><span class="strong">Deprecated.</span></div>  </dd> <dt><span class="strong"><a href="./org/apache/commons/net/telnet/TelnetCommand.html#ABORT">ABORT</a></span> - Static variable in class org.apache.commons.net.telnet.<a href="./org/apache/commons/net/telnet/TelnetCommand.html" title="class in org.apache.commons.net.telnet">TelnetCommand</a></dt> <dd> <div class="block">Abort code.</div> </dd> <dt><span class="strong"><a href="./org/apache/commons/net/ftp/FTPFileFilter.html#accept(org.apache.commons.net.ftp.FTPFile)">accept(FTPFile)</a></span> - Method in interface org.apache.commons.net.ftp.<a href="./org/apache/commons/net/ftp/FTPFileFilter.html" title="interface in org.apache.commons.net.ftp">FTPFileFilter</a></dt> <dd> <div class="block">Checks if an FTPFile entry should be included or not.</div> </dd> <dt><span class="strong"><a href="./org/apache/commons/net/tftp/TFTPErrorPacket.html#ACCESS_VIOLATION">ACCESS_VIOLATION</a></span> - Static variable in class org.apache.commons.net.tftp.<a href="./org/apache/commons/net/tftp/TFTPErrorPacket.html" title="class in org.apache.commons.net.tftp">TFTPErrorPacket</a></dt> <dd> <div class="block">The access violation error code according to RFC 783, value 2.</div> </dd> <dt><span class="strong"><a href="./org/apache/commons/net/ftp/FTPCmd.html#ACCOUNT">ACCOUNT</a></span> - Static variable in enum org.apache.commons.net.ftp.<a href="./org/apache/commons/net/ftp/FTPCmd.html" title="enum in org.apache.commons.net.ftp">FTPCmd</a></dt> <dd> </dd> <dt><span class="strong"><a href="./org/apache/commons/net/ftp/FTPCommand.html#ACCOUNT">ACCOUNT</a></span> - Static variable in class org.apache.commons.net.ftp.<a href="./org/apache/commons/net/ftp/FTPCommand.html" title="class in org.apache.commons.net.ftp">FTPCommand</a></dt> <dd> <div class="block"><span class="strong">Deprecated.</span></div>  </dd> <dt><span class="strong"><a href="./org/apache/commons/net/ftp/FTP.html#acct(java.lang.String)">acct(String)</a></span> - Method in class org.apache.commons.net.ftp.<a href="./org/apache/commons/net/ftp/FTP.html" title="class in org.apache.commons.net.ftp">FTP</a></dt> <dd> <div class="block">A convenience method to send the FTP ACCT command to the server, receive the reply, and return the reply code.</div> </dd> <dt><span class="strong"><a href="./org/apache/commons/net/ftp/FTPCommand.html#ACCT">ACCT</a></span> - Static variable in class org.apache.commons.net.ftp.<a href="./org/apache/commons/net/ftp/FTPCommand.html" title="class in org.apache.commons.net.ftp">FTPCommand</a></dt> <dd> <div class="block"><span class="strong">Deprecated.</span></div>  </dd> <dt><span class="strong"><a href="./org/apache/commons/net/tftp/TFTPPacket.html#ACKNOWLEDGEMENT">ACKNOWLEDGEMENT</a></span> - Static variable in class org.apache.commons.net.tftp.<a href="./org/apache/commons/net/tftp/TFTPPacket.html" title="class in org.apache.commons.net.tftp">TFTPPacket</a></dt> <dd> <div class="block">This is the actual TFTP spec identifier and is equal to 4.</div> </dd> <dt><span class="strong"><a href="./org/apache/commons/net/ftp/FTPReply.html#ACTION_ABORTED">ACTION_ABORTED</a></span> - Static variable in class org.apache.commons.net.ftp.<a href="./org/apache/commons/net/ftp/FTPReply.html" title="class in org.apache.commons.net.ftp">FTPReply</a></dt> <dd> </dd> <dt><span class="strong"><a href="./org/apache/commons/net/smtp/SMTPReply.html#ACTION_ABORTED">ACTION_ABORTED</a></span> - Static variable in class org.apache.commons.net.smtp.<a href="./org/apache/commons/net/smtp/SMTPReply.html" title="class in org.apache.commons.net.smtp">SM

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