网站页面怎么优化,定制网站建设多少钱,怎样做自己的公司网站,国防科技大学简介一、摘要#xff08;本系列汇总说明#xff09; - 总纲 FTP、SFTP上传下传、进度监控、断点续传、连接池封装JAVA一网打尽#xff08;一#xff09; FTP、SFTP上传下传、进度监控、断点续传、连接池封装JAVA一网打尽#xff08;二#xff09; FTP、SFTP上传下传、进度监…一、摘要本系列汇总说明 - 总纲 FTP、SFTP上传下传、进度监控、断点续传、连接池封装JAVA一网打尽一 FTP、SFTP上传下传、进度监控、断点续传、连接池封装JAVA一网打尽二 FTP、SFTP上传下传、进度监控、断点续传、连接池封装JAVA一网打尽三 FTP、SFTP上传下传、进度监控、断点续传、连接池封装JAVA一网打尽四FTP、SFTP上传下传、进度监控、断点续传、连接池封装JAVA一网打尽五【完结篇】 FTP、SFTP上传下传、进度监控、断点续传、连接池封装JAVA一网打尽六【汇总篇】 - 篇章内容说明 第一篇基础篇讲FTP常规上传下载实现、SFTP常规上传下载实现、单元测试类 第二篇FTP高级篇讲FTP上传进度监控、断点续传FTP下载进度监控、断点续传 第三篇SFTP高级篇讲SFTP上传进度监控、断点续传SFTP下载进度监控、断点续传 第四篇FTP进阶篇讲FTP池化处理连接池封装 第五篇【完结篇】SFTP进阶篇讲SFTP池化处理连接池封装 第六篇汇总篇包含前面15篇所有内容且增加更高级的相关知识点 - 本篇 本文是SFTP进阶篇讲SFTP池化处理连接池封装 二、环境 - SpringBoot 2.7.18   官方下载地址SpringBoot 2.7.18 - commons-net-3.10.0.jar   官方下载地址commons-net-3.10.0.jar - commons-pool2-2.12.0.jar   官方下载地址commons-pool2-2.12.0.jar - jsch-0.1.55.jar  官方下载地址jsch-0.1.55.jar - Oracle JDK8u202(Oracle JDK8最后一个非商业版本)   下载地址Oracle JDK8u202 - FileZilla Client  官方下载地址FileZilla Client 注意 - 特别是MacOS用户FileZilla有MacOS版本下载客户端是下Client不是Server注意一下名字不要下错了。 三、POM依赖 该系列文章通用几篇FTP文章的pom文件都一样 ?xml version1.0 encodingUTF-8? project xmlnshttp://maven.apache.org/POM/4.0.0xmlns:xsihttp://www.w3.org/2001/XMLSchema-instancexsi:schemaLocationhttp://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsdmodelVersion4.0.0/modelVersiongroupIdperson.brickman/groupIdartifactIdftp/artifactIdversion1.0-SNAPSHOT/versionparentgroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-parent/artifactIdversion2.7.18/version/parentpropertiesproject.build.sourceEncodingUTF-8/project.build.sourceEncodingproject.reporting.outputEncodingUTF-8/project.reporting.outputEncodingjava.version1.8/java.versionhttpclient.version4.5.14/httpclient.version!-- 工具 --lombok.version1.18.32/lombok.versioncommons-logging.version1.3.1/commons-logging.versioncommons-lang3.version3.14.0/commons-lang3.versioncommons-io.version2.15.1/commons-io.versioncommons-configuration.version1.10/commons-configuration.versioncommons-net.version3.10.0/commons-net.versioncommons-pool2.version2.12.0/commons-pool2.versionjsch.version0.1.55/jsch.version !-- sshd.version2.12.1/sshd.version--!-- 2.20.1 2.22.2 3.0.0-M2 3.2.5 --maven-surefire-plugin.version3.2.5/maven-surefire-plugin.version!-- 3.0.1 2.4 --maven-source-plugin.version3.0.1/maven-source-plugin.version!--忽略本包测试--maven.test.skipfalse/maven.test.skipskipTestsfalse/skipTests/propertiesdependenciesdependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter/artifactId/dependencydependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-actuator/artifactIdscopeprovided/scope/dependencydependencygroupIdio.micrometer/groupIdartifactIdmicrometer-registry-prometheus/artifactId/dependencydependencygroupIdorg.slf4j/groupIdartifactIdslf4j-api/artifactIdversion${slf4j.version}/version/dependency!-- 工具 --dependencygroupIdorg.projectlombok/groupIdartifactIdlombok/artifactIdscopecompile/scope/dependencydependencygroupIdorg.apache.commons/groupIdartifactIdcommons-lang3/artifactId/dependencydependencygroupIdcommons-net/groupIdartifactIdcommons-net/artifactIdversion${commons-net.version}/version/dependencydependencygroupIdorg.apache.commons/groupIdartifactIdcommons-pool2/artifactId/dependencydependencygroupIdcommons-logging/groupIdartifactIdcommons-logging/artifactIdversion${commons-logging.version}/version/dependencydependencygroupIdcom.jcraft/groupIdartifactIdjsch/artifactIdversion${jsch.version}/version/dependency!-- 测试相关 --dependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-test/artifactIdscopetest/scope/dependency/dependenciesbuildpluginsplugingroupIdorg.apache.maven.plugins/groupIdartifactIdmaven-jar-plugin/artifactIdversion2.6/version/pluginplugingroupIdorg.apache.maven.plugins/groupIdartifactIdmaven-source-plugin/artifactIdversion${maven-source-plugin.version}/versionconfigurationattachtrue/attach/configurationexecutionsexecutionphasecompile/phase/execution/executions/pluginplugingroupIdorg.apache.maven.plugins/groupIdartifactIdmaven-deploy-plugin/artifactIdversion2.8.2/versionexecutionsexecutioniddeploy/idphasedeploy/phasegoalsgoaldeploy/goal/goals/execution/executions/pluginplugingroupIdorg.apache.maven.plugins/groupIdartifactIdmaven-surefire-plugin/artifactIdconfiguration!-- 跳过失败的单元测试 --testFailureIgnorefalse/testFailureIgnoreskipTests${skipTests}/skipTestsargLine${junit.test.params} -Xmx512m -XX:MaxPermSize256m/argLine/configuration/plugin/plugins/build/project 四、实现类 1、常量接口类FtpKeyValue 接口类读者觉得常量类更顺眼也可以改阿里原装的 package person.brickman.ftp.consts;/*** alibaba.datax.ftpreader** author datax*/ public interface FtpKeyValue {/*** FTP 常用键定义*/String PROTOCOL protocol;String HOST host;String USERNAME username;String PASSWORD password;String PORT port;String TIMEOUT timeout;String CONNECTPATTERN connectPattern;String PATH path;String MAXTRAVERSALLEVEL maxTraversalLevel;/*** 默认值定义*/int DEFAULT_FTP_PORT 21;int DEFAULT_SFTP_PORT 22;int DEFAULT_TIMEOUT 60000;int DEFAULT_MAX_TRAVERSAL_LEVEL 100;String DEFAULT_FTP_CONNECT_PATTERN PASV;String CONTROL_ENCODING utf8;String NO_SUCH_FILE no such file;char C_STAR *;String STAR *;char C_QUESTION ?;String QUESTION ?;String SLASH /;String DOT .;String DOUBLE_DOT ..; } 2、统一抽象类AbstractFtpHelper  抽象类不管ftp还是sftp都使用此抽象类而不是直接操作实现类 package person.brickman.ftp;import java.io.InputStream; import java.io.OutputStream; import java.util.HashSet; import java.util.List; import java.util.Set;/*** alibaba.datax.ftpreader** author datax*/ public abstract class AbstractFtpHelper {public abstract void setFtpClient(Object ftpClient);public abstract Object getFtpClient() ;/*** 与ftp服务器建立连接** param param host* param param username* param param password* param param port* param param timeout* param param connectMode PASV PORT* return void* throws*/public abstract void loginFtpServer(String host, String username, String password, int port, int timeout, String connectMode) throws InterruptedException;/*** 断开与ftp服务器的连接** param* return void* throws*/public abstract void logoutFtpServer();/*** 判断指定路径是否是目录** param param directoryPath* param return* return boolean* throws*/public abstract boolean isDirExist(String directoryPath);/*** 判断指定路径是否是文件** param param filePath* param return* return boolean* throws*/public abstract boolean isFileExist(String filePath);/*** 判断指定路径是否是软链接** param param filePath* param return* return boolean* throws*/public abstract boolean isSymbolicLink(String filePath);/*** 递归获取指定路径下符合条件的所有文件绝对路径** param param directoryPath* param param parentLevel 父目录的递归层数首次为0* param param maxTraversalLevel 允许的最大递归层数* param return* return HashSetString* throws*/public abstract HashSetString getAllFilesInDir(String directoryPath, int parentLevel, int maxTraversalLevel);/*** 获取指定路径的输入流** param param filePath* param return* return InputStream* throws*/public abstract InputStream getInputStream(String filePath);/*** 写入指定路径的输出流** param param filePath* param return* return InputStream* throws*/public abstract OutputStream getOutputStream(String filePath);/*** 写入指定路径的输出流** param param filePath* param param mode OVERWRITE 0; RESUME 1; APPEND 2;* param return* return InputStream* throws*/public abstract OutputStream getOutputStream(String filePath, int mode);/*** 获取指定路径列表下符合条件的所有文件的绝对路径** param param srcPaths 路径列表* param param parentLevel 父目录的递归层数首次为0* param param maxTraversalLevel 允许的最大递归层数* param return* return HashSetString* throws*/public HashSetString getAllFilesInDir(ListString srcPaths, int parentLevel, int maxTraversalLevel) {HashSetString sourceAllFiles new HashSetString();if (!srcPaths.isEmpty()) {for (String eachPath : srcPaths) {sourceAllFiles.addAll(getAllFilesInDir(eachPath, parentLevel, maxTraversalLevel));}}return sourceAllFiles;}/*** 创建远程目录* 不支持递归创建, 比如 mkdir -p** param directoryPath*/public abstract void mkdir(String directoryPath);/*** 创建远程目录* 支持目录递归创建** param directoryPath*/public abstract void mkDirRecursive(String directoryPath);/*** Q:After I perform a file transfer to the server,* printWorkingDirectory() returns null. A:You need to call* completePendingCommand() after transferring the file. wiki:* http://wiki.apache.org/commons/Net/FrequentlyAskedQuestions*/public abstract void completePendingCommand();/*** 删除文件* warn: 不支持文件夹删除, 比如 rm -rf** param filesToDelete*/public abstract void deleteFiles(SetString filesToDelete);/*** 移动文件* warn: 不支持文件夹删除, 比如 rm -rf** param filesToMove* param targetPath*/public abstract void moveFiles(SetString filesToMove, String targetPath); } 3、STP实现类SftpHelper FTP上传下载实现类 package person.brickman.ftp;import com.jcraft.jsch.*; import lombok.extern.slf4j.Slf4j; import org.apache.commons.lang3.StringUtils; import person.brickman.ftp.consts.FtpKeyValue;import java.io.File; import java.io.InputStream; import java.io.OutputStream; import java.util.HashSet; import java.util.Properties; import java.util.Set; import java.util.Vector;/*** alibaba.datax.ftpreader** author datax*/ Slf4j public class SftpHelper extends AbstractFtpHelper {Session session null;ChannelSftp channelSftp null;HashSetString sourceFiles new HashSetString();Overridepublic void setFtpClient(Object channelSftp) {this. channelSftp(ChannelSftp)channelSftp;}Overridepublic Object getFtpClient() {return channelSftp;}Overridepublic void loginFtpServer(String host, String username, String password, int port, int timeout, String connectMode) throws InterruptedException {JSch jsch new JSch();try {session jsch.getSession(username, host, port); // Thread.sleep(3*1000);// 根据用户名主机ip端口获取一个Session对象// 如果服务器连接不上则抛出异常if (session null) {throw new RuntimeException(session is null,无法通过sftp与服务器建立链接请检查主机名和用户名是否正确. );}// 设置密码session.setPassword(password);Properties config new Properties();config.put(StrictHostKeyChecking , no );// 为Session对象设置propertiessession.setConfig(config);// 设置timeout时间session.setTimeout(timeout);// 通过Session建立链接session.connect( );// 打开SFTP通道channelSftp (ChannelSftp) session.openChannel(sftp ); // channelSftp.// 建立SFTP通道的连接channelSftp.connect( 5*1000);//设置命令传输编码/// String fileEncoding System.getProperty(file.encoding);// channelSftp.setFilenameEncoding(fileEncoding);} catch (JSchException e) {e.printStackTrace();if (null ! e.getCause()) {String cause e.getCause().toString();String unknownHostException java.net.UnknownHostException: host;String illegalArgumentException java.lang.IllegalArgumentException: port out of range: port;String wrongPort java.net.ConnectException: Connection refused;if (unknownHostException.equals(cause)) {String message String.format(请确认ftp服务器地址是否正确无法连接到地址为: [%s] 的ftp服务器 , host);log.error(message);throw new RuntimeException(message);} else if (illegalArgumentException.equals(cause) || wrongPort.equals(cause)) {String message String.format(请确认连接ftp服务器端口是否正确错误的端口: [%s] , port);log.error(message);throw new RuntimeException(message);}} else {if (Auth fail.equals(e.getMessage())) {String message String.format(与ftp服务器建立连接失败,请检查用户名和密码是否正确: [%s] , message:host host ,username username ,port port);log.error(message);throw new RuntimeException(message);} else {String message String.format(与ftp服务器建立连接失败 : [%s] , message:host host ,username username ,port port);log.error(message);throw new RuntimeException(message);}}}}Overridepublic void logoutFtpServer() {if (channelSftp ! null) {channelSftp.disconnect();}if (session ! null) {session.disconnect();}}Overridepublic boolean isDirExist(String directoryPath) {try {SftpATTRS sftpATTRS channelSftp.lstat(directoryPath);return sftpATTRS.isDir();} catch (SftpException e) {if (e.getMessage().toLowerCase().equals(FtpKeyValue.NO_SUCH_FILE)) {String message String.format(请确认您的配置项path:[%s]存在且配置的用户有权限读取 , directoryPath);log.error(message);throw new RuntimeException(message);}String message String.format(进入目录[%s]时发生I/O异常,请确认与ftp服务器的连接正常 , directoryPath);log.error(message);throw new RuntimeException(message);}}Overridepublic boolean isFileExist(String filePath) {boolean isExitFlag false;try {SftpATTRS sftpATTRS channelSftp.lstat(filePath);if (sftpATTRS.getSize() 0) {isExitFlag true;}} catch (SftpException e) {if (e.getMessage().toLowerCase().equals(FtpKeyValue.NO_SUCH_FILE)) {String message String.format(请确认您的配置项path:[%s]存在且配置的用户有权限读取 , filePath);log.error(message);throw new RuntimeException(message);} else {String message String.format(获取文件[%s] 属性时发生I/O异常,请确认与ftp服务器的连接正常 , filePath);log.error(message);throw new RuntimeException(message);}}return isExitFlag;}Overridepublic boolean isSymbolicLink(String filePath) {try {SftpATTRS sftpATTRS channelSftp.lstat(filePath);return sftpATTRS.isLink();} catch (SftpException e) {if (e.getMessage().toLowerCase().equals(FtpKeyValue.NO_SUCH_FILE)) {String message String.format(请确认您的配置项path:[%s]存在且配置的用户有权限读取 , filePath);log.error(message);throw new RuntimeException(message);} else {String message String.format(获取文件[%s] 属性时发生I/O异常,请确认与ftp服务器的连接正常 , filePath);log.error(message);throw new RuntimeException(message);}}}Overridepublic HashSetString getAllFilesInDir(String directoryPath, int parentLevel, int maxTraversalLevel) {if (parentLevel maxTraversalLevel) {// 父级目录,以/结尾String parentPath;int pathLen directoryPath.length();// *和的限制if (directoryPath.contains(FtpKeyValue.STAR) || directoryPath.contains(FtpKeyValue.QUESTION)) {// path是正则表达式String subPath UnstructuredStorageReaderUtil.getRegexPathParentPath(directoryPath);if (isDirExist(subPath)) {parentPath subPath;} else {String message String.format(不能进入目录[%s], 请确认您的配置项path:[%s]存在且配置的用户有权限进入 , subPath, directoryPath);log.error(message);throw new RuntimeException(message);}} else if (isDirExist(directoryPath)) {// path是目录if (directoryPath.charAt(pathLen - 1) File.separatorChar) {parentPath directoryPath;} else {parentPath directoryPath File.separatorChar;}} else if (isSymbolicLink(directoryPath)) {//path是链接文件String message String.format(文件:[%s]是链接文件当前不支持链接文件的读取 , directoryPath);log.error(message);throw new RuntimeException(message);} else if (isFileExist(directoryPath)) {// path指向具体文件sourceFiles.add(directoryPath);return sourceFiles;} else {String message String.format(请确认您的配置项path:[%s]存在且配置的用户有权限读取 , directoryPath);log.error(message);throw new RuntimeException(message);}try {Vector vector channelSftp.ls(directoryPath);for (int i 0; i vector.size(); i) {ChannelSftp.LsEntry le (ChannelSftp.LsEntry) vector.get(i);String strName le.getFilename();String filePath parentPath strName;if (isDirExist(filePath)) {// 是子目录if (!(strName.equals(FtpKeyValue.DOT) || strName.equals(FtpKeyValue.DOUBLE_DOT))) {//递归处理getAllFilesInDir(filePath, parentLevel 1, maxTraversalLevel);}} else if (isSymbolicLink(filePath)) {//是链接文件String message String.format(文件:[%s]是链接文件当前不支持链接文件的读取 , filePath);log.error(message);throw new RuntimeException(message);} else if (isFileExist(filePath)) {// 是文件sourceFiles.add(filePath);} else {String message String.format(请确认path:[%s]存在且配置的用户有权限读取 , filePath);log.error(message);throw new RuntimeException(message);}}} catch (SftpException e) {String message String.format(获取path[%s] 下文件列表时发生I/O异常,请确认与ftp服务器的连接正常 , directoryPath);log.error(message);throw new RuntimeException(message);}return sourceFiles;} else {//超出最大递归层数String message String.format(获取path[%s] 下文件列表时超出最大层数,请确认路径[%s]下不存在软连接文件 , directoryPath, directoryPath);log.error(message);throw new RuntimeException(message);}}Overridepublic InputStream getInputStream(String filePath) {try {return channelSftp.get(filePath);} catch (SftpException e) {String message String.format(读取文件 : [%s] 时出错,请确认文件[%s]存在且配置的用户有权限读取 , filePath, filePath);log.error(message);throw new RuntimeException(message);}}Overridepublic OutputStream getOutputStream(String filePath) {return getOutputStream(filePath, ChannelSftp.APPEND);}Overridepublic OutputStream getOutputStream(String filePath, int mode) {try {this.printWorkingDirectory();String parentDir filePath.substring(0, filePath.lastIndexOf(File.separatorChar));this.channelSftp.cd(parentDir);this.printWorkingDirectory();OutputStream writeOutputStream this.channelSftp.put(filePath, mode);String message String.format(打开FTP文件[%s]获取写出流时出错,请确认文件%s有权限创建有权限写出等 , filePath, filePath);if (null writeOutputStream) {throw new RuntimeException(message);}return writeOutputStream;} catch (SftpException e) {String message String.format(写出文件[%s] 时出错,请确认文件%s有权限写出, errorMessage:%s , filePath, filePath, e.getMessage());log.error(message);throw new RuntimeException(message);}}Overridepublic void mkdir(String directoryPath) {boolean isDirExist false;try {this.printWorkingDirectory();SftpATTRS sftpATTRS this.channelSftp.lstat(directoryPath);isDirExist sftpATTRS.isDir();} catch (SftpException e) {if (e.getMessage().toLowerCase().equals(FtpKeyValue.NO_SUCH_FILE)) {log.warn(String.format(您的配置项path:[%s]不存在将尝试进行目录创建, errorMessage:%s , directoryPath, e.getMessage()), e);isDirExist false;}}if (!isDirExist) {try {// warn 检查mkdir -pthis.channelSftp.mkdir(directoryPath);} catch (SftpException e) {String message String.format(创建目录:%s时发生I/O异常,请确认与ftp服务器的连接正常,拥有目录创建权限, errorMessage:%s , directoryPath, e.getMessage());log.error(message, e);throw new RuntimeException(message);}}}Overridepublic void mkDirRecursive(String directoryPath) {boolean isDirExist false;try {this.printWorkingDirectory();SftpATTRS sftpATTRS this.channelSftp.lstat(directoryPath);isDirExist sftpATTRS.isDir();} catch (SftpException e) {if (e.getMessage().toLowerCase().equals(FtpKeyValue.NO_SUCH_FILE)) {log.warn(String.format(您的配置项path:[%s]不存在将尝试进行目录创建, errorMessage:%s , directoryPath, e.getMessage()), e);isDirExist false;}}if (!isDirExist) {StringBuilder dirPath new StringBuilder();dirPath.append(FtpKeyValue.SLASH);String[] dirSplit StringUtils.split(directoryPath, FtpKeyValue.SLASH);try {// ftp server不支持递归创建目录,只能一级一级创建for (String dirName : dirSplit) {dirPath.append(dirName);mkDirSingleHierarchy(dirPath.toString());dirPath.append(FtpKeyValue.SLASH);}} catch (SftpException e) {String message String.format(创建目录:%s时发生I/O异常,请确认与ftp服务器的连接正常,拥有目录创建权限, errorMessage:%s , directoryPath, e.getMessage());log.error(message, e);throw new RuntimeException(message);}}}Overridepublic void completePendingCommand() {}Overridepublic void deleteFiles(SetString filesToDelete) {String eachFile null;try {this.printWorkingDirectory();for (String each : filesToDelete) {log.info(String.format(delete file [%s]. , each));eachFile each;this.channelSftp.rm(each);}} catch (SftpException e) {String message String.format(删除文件:[%s] 时发生异常,请确认指定文件有删除权限,以及网络交互正常, errorMessage:%s , eachFile, e.getMessage());log.error(message);throw new RuntimeException(message);}}Overridepublic void moveFiles(SetString filesToMove, String targetPath) {if (StringUtils.isBlank(targetPath)) {throw new RuntimeException(目标目录路径为空! );}String eachFile null;try {this.printWorkingDirectory();// 创建目录mkdir(targetPath);for (String each : filesToMove) {log.info(String.format(rename file [%s]. , each));eachFile each;String targetName String.format(%s%s , targetPath.endsWith(File.separator) ?targetPath.substring(0, targetPath.length() - 1) : targetPath, each.substring(each.lastIndexOf(File.separator)));this.channelSftp.rename(each, targetPath);}} catch (SftpException e) {String message String.format(移动文件:[%s] 时发生异常,请确认指定文件有删除权限,以及网络交互正常, errorMessage:%s , eachFile, e.getMessage());log.error(message);throw new RuntimeException(message);}}public boolean mkDirSingleHierarchy(String directoryPath) throws SftpException {boolean isDirExist false;try {SftpATTRS sftpATTRS this.channelSftp.lstat(directoryPath);isDirExist sftpATTRS.isDir();} catch (SftpException e) {if (!isDirExist) {log.info(String.format(正在逐级创建目录 [%s] , directoryPath));this.channelSftp.mkdir(directoryPath);return true;}}if (!isDirExist) {log.info(String.format(正在逐级创建目录 [%s] , directoryPath));this.channelSftp.mkdir(directoryPath);}return true;}private void printWorkingDirectory() {try {log.info(String.format(current working directory:%s , this.channelSftp.pwd()));} catch (Exception e) {log.warn(String.format(printWorkingDirectory error:%s , e.getMessage()));}} }4、SFTP进度监控实现类FileProgressMonitor - FTP上传下载进度监控实现类 - 此类可以日志中打印上传/下载进度 - 日志打印的精度可通过调整代码中被除数的陪数控制 - 实际应用中如果是web应用可通过session变量实现前台页面进度展示 - 前台进度更新精度实现同程序日志进度打印精度控制逻辑 package person.brickman.ftp;import com.jcraft.jsch.SftpProgressMonitor; import lombok.extern.slf4j.Slf4j; /*** Description: sftp 上传下载进度监控* Author brickman* CreateDate: 2025/1/2 20:30* Version: 1.0*/ Slf4j public class FileProgressMonitor implements SftpProgressMonitor {private long count 0; //当前接收的总字节数private long max 0; /* 最终文件大小 */private long percent -1;//进度/*** 当每次传输了一个数据块后调用count方法count方法的参数为这一次传输的数据块大小* 大** 这里显示的百分比是整数*/Overridepublic boolean count(long count) {this.count count;if (percent this.count * 100 / max) {return true;}percent this.count * 100 / max;log.info(Completed {}({}%) out of {}., this.count, percent, max ); //打印当前进度return true;}/*** 大大* 当传输结束时调用end方法* 大*/Overridepublic void end() {log.info(Transferring done.);}/*** 当文件开始传输时调用init方法* 大*/Overridepublic void init(int op, String src, String dest, long max) {log.info(Transferring begin. );this.max max;this.count 0;this.percent -1;} } 5、SFTP客户端工厂类SftpClientFactory package person.brickman.ftp.pool;import lombok.extern.slf4j.Slf4j; import org.apache.commons.net.ftp.FTPClient; import org.apache.commons.net.ftp.FTPReply; import org.apache.commons.pool2.DestroyMode; import org.apache.commons.pool2.PooledObject; import org.apache.commons.pool2.PooledObjectFactory; import org.apache.commons.pool2.impl.DefaultPooledObject;import java.net.UnknownHostException; /*** Description: ftp 池化封装工厂类* Author: brickman* CreateDate: 2025/1/2 20:30* Version: 1.0*/ Slf4j public class FtpClientFactory implements PooledObjectFactoryFTPClient {private String host;private int port;private String user;private String password;/** FTP主动模式port和被动模式PASV default:PASV */private String connectModePASV;public FtpClientFactory(String host, int port, String user, String password) {this.host host;this.port port;this.user user;this.password password;}public FtpClientFactory(String host, int port, String user, String password, String connectMode) {this.host host;this.port port;this.user user;this.password password;this.connectMode connectMode;}Overridepublic void activateObject(PooledObjectFTPClient pooledObject) throws Exception {if(pooledObject.getObject().isAvailable()){pooledObject.getObject().sendNoOp();}else{pooledObject.getObject().disconnect();}}Overridepublic void destroyObject(PooledObjectFTPClient pooledObject) throws Exception {if (pooledObject.getObject() ! null) {pooledObject.getObject().disconnect();}}Overridepublic void destroyObject(PooledObjectFTPClient p, DestroyMode destroyMode) throws Exception {PooledObjectFactory.super.destroyObject(p, destroyMode);}Overridepublic PooledObjectFTPClient makeObject() throws Exception {FTPClient ftpClient new FTPClient();try {// 连接ftpClient.connect(host, port);// 登录ftpClient.login(user, password);// 不需要写死ftp server的OS TYPE,FTPClient getSystemType()方法会自动识别/// ftpClient.configure(new FTPClientConfig(FTPClientConfig.SYST_UNIX));ftpClient.setConnectTimeout(15*1000);// 0 infinite 无穷大 当前设置15秒ftpClient.setDataTimeout(15*1000);if (PASV.equals(connectMode)) {ftpClient.enterRemotePassiveMode();ftpClient.enterLocalPassiveMode();} else if (PORT.equals(connectMode)) {ftpClient.enterLocalActiveMode();/// ftpClient.enterRemoteActiveMode(host, port);}int reply ftpClient.getReplyCode();if (!FTPReply.isPositiveCompletion(reply)) {ftpClient.disconnect();String message String.format(与ftp服务器建立连接失败,请检查用户名和密码是否正确: [%s],message:host host ,username user ,port port);log.error(message);throw new RuntimeException(message);}//设置命令传输编码String fileEncoding System.getProperty(file.encoding);ftpClient.setControlEncoding(fileEncoding);} catch (UnknownHostException e) {String message String.format(请确认ftp服务器地址是否正确无法连接到地址为: [%s] 的ftp服务器, host);log.error(message);throw new RuntimeException(message);} catch (IllegalArgumentException e) {String message String.format(请确认连接ftp服务器端口是否正确错误的端口: [%s] , port);log.error(message);throw new RuntimeException(message);} catch (Exception e) {String message String.format(与ftp服务器建立连接失败 : [%s],message:host host ,username user ,port port);log.error(message);throw new RuntimeException(message);}return new DefaultPooledObjectFTPClient(ftpClient);}Overridepublic void passivateObject(PooledObjectFTPClient pooledObject) throws Exception {// 可不使用钝化方法就不用实现 // pooledObject.getObject().exit();}Overridepublic boolean validateObject(PooledObjectFTPClient pooledObject) {return pooledObject.getObject().isConnected();} } 6、SFTP连接池类SftpClientPool package person.brickman.ftp.pool;import com.jcraft.jsch.ChannelSftp; import org.apache.commons.pool2.impl.GenericObjectPool; import org.apache.commons.pool2.impl.GenericObjectPoolConfig; import person.brickman.ftp.utils.EncryptUtil;/*** Description: sftp 池化封装池访问类* Author: brickman* CreateDate: 2025/1/2 20:30* Version: 1.0*/ public class SftpClientPool {private GenericObjectPoolChannelSftp pool;public SftpClientPool(String host, int port, String user, String password) {GenericObjectPoolConfig poolConfig new GenericObjectPoolConfig();poolConfig.setMaxTotal(50); // 最大连接数poolConfig.setMaxIdle(20); // 最大空闲连接数poolConfig.setMinIdle(10); // 最小空闲连接数pool new GenericObjectPool(new SftpClientFactory(host, port, user, password), poolConfig);}public SftpClientPool( Boolean configDecrypt, String configDecryptKey,String host, int port, String user, String password) throws Exception {GenericObjectPoolConfig poolConfig new GenericObjectPoolConfig();poolConfig.setMaxTotal(50); // 最大连接数poolConfig.setMaxIdle(20); // 最大空闲连接数poolConfig.setMinIdle(10); // 最小空闲连接数if(configDecrypt){user EncryptUtil.aesDecrypt( user, configDecryptKey );password EncryptUtil.aesDecrypt( password, configDecryptKey );}pool new GenericObjectPool(new SftpClientFactory(host, port, user, password), poolConfig);}public ChannelSftp getSftpClient() throws Exception {return pool.borrowObject();}public void returnSftpClient(ChannelSftp sftpClient) {pool.returnObject(sftpClient);}} 五、单元测试类 1、SFTP单元测试类SftpClientPoolTest 使用springboot自带junit5实现 testUpload  上传带池 testUploadWithProgressMonitorWithRESUME  带池上传支持断点续传和进度监控 testDownload  下载带池 testDownloadWithProgerssMonitorWithRESUME  带池下载支持断点续传和进度监控 说明 读者本地运行前先修改单元测试类中的常量ip、port、username、password、路径、文件名等 package persion.brickman.ftp;import com.jcraft.jsch.ChannelSftp; import com.jcraft.jsch.SftpProgressMonitor; import lombok.extern.slf4j.Slf4j; import org.junit.jupiter.api.*; import org.springframework.boot.test.context.SpringBootTest; import person.brickman.ftp.AbstractFtpHelper; import person.brickman.ftp.FileProgressMonitor; import person.brickman.ftp.SftpHelper; import person.brickman.ftp.pool.SftpClientPool;import java.io.File; import java.nio.file.Files; import java.util.HashSet; import java.util.Set;/*** Description: sftpclient 连接池测试** 同SftpClientPoolTest只是换了种写法一个是在每个方法执行前都读配置一个是所有方法执行前读配置* 实际两种都只创建了一次池不过是创建的时机不一样** 上传含 进度监控、断点续传* 下载含 进度监控、断点续传** Author: brickman* CreateDate: 2025/1/2 20:30* Version: 1.0*/ Slf4j SpringBootTest public class SftpClientPoolTest {private static Boolean configDecrypt;private static String configDecryptKey;private static SftpClientPool pool;private static String host 172.16.0.232;private static int port 22;private static String username root;private static String password root02027;private static String localDir /Users/brickman/tmp;private static String uploadLocalFileName 工作JUDE_v5测试.zip;private static String uploadLocalFilePath localDir/uploadLocalFileName;private static String remoteDir /root/tmp/sftpdir;private static String downloadRemoteFileName 工作JUDE_v5测试.zip;private static String downloadRemoteFilePath remoteDir/downloadRemoteFileName;BeforeAllpublic static void setUpBeforeClass() throws Exception {System.out.println(BeforeClass: 在所有测试方法执行前只执行一次);if(poolnull){pool new SftpClientPool(host, port, username, password );}}BeforeEachpublic void setUp() throws Exception {System.out.println(Before: 在每个测试方法执行前都会执行);}/*** sftp上传功能单元测试* 本地路径uploadLocalFilePath eg /Users/brickman/tmp/工作JUDE_v5测试.zip* 远程路径remoteFilePath eg/root/tmp/sftpdir/ unitTestMethodName-测试.zip;* throws Exception*/TestDisabledpublic void testUpload( ) throws Exception {String method Thread.currentThread().getStackTrace()[1].getMethodName();String remoteFileName method-测试.zip;String remoteFilePath remoteDir/remoteFileName;long start System.currentTimeMillis();ChannelSftp sftp pool.getSftpClient();// 用于调用统一封装的方法AbstractFtpHelper ftpHelper new SftpHelper();ftpHelper.setFtpClient(sftp);try { // sftp.lcd(); // sftp.cd();// 使用sftp客户端执行操作, 默认模式OVERWRITE覆盖sftp.put( uploadLocalFilePath, remoteFilePath );log.info(File transfer(upload) completed successfully.);long end System.currentTimeMillis();log.info( time cost: {} ms, req url ftp://{}{}, , end-start, host, remoteFilePath);log.info( localFilePath:{}, , uploadLocalFilePath);// 校验并删除单元测试不留痕Assertions.assertTrue( ftpHelper.isFileExist(remoteFilePath) );SetString set new HashSetString();set.add(remoteFilePath);ftpHelper.deleteFiles(set);}catch (Exception e){log.error(文件上传失败 : , e);throw e;} finally {pool.returnSftpClient(sftp); // 归还到对象池}}/*** sftp上传功能单元测试* 本地路径uploadLocalFilePath eg /Users/brickman/tmp/工作JUDE_v5测试.zip* 远程路径remoteFilePath eg/root/tmp/sftpdir/ unitTestMethodName-测试.zip;* throws Exception*/Test // Disabledpublic void testUploadWithProgressMonitorWithRESUME2( ) throws Exception {String method Thread.currentThread().getStackTrace()[1].getMethodName();String remoteFileName method-测试.zip;String remoteFilePath remoteDir/remoteFileName;long start System.currentTimeMillis();ChannelSftp sftp pool.getSftpClient();// 使用实现了SftpProgressMonitor接口的monitor对象来监控文件传输的进度SftpProgressMonitor monitor new FileProgressMonitor();// 用于调用统一封装的方法AbstractFtpHelper ftpHelper new SftpHelper();ftpHelper.setFtpClient(sftp);try {log.info(sftp.lpwd():{},sftp.lpwd());log.info(sftp.pwd():{},sftp.pwd());// 切换到远程目录 // sftpChannel.cd(remoteDir);sftp.cd(remoteDir);log.info(sftp.lpwd():{},sftp.lpwd());log.info(sftp.pwd():{},sftp.pwd());// 上传文件 // sftp.put(localFilePath, remoteFileName); // 上传到远程目录并重命名为 remoteFileName // /* 上传到远程目录并重命名为remoteFileName, 带进度 */ // sftp.put(localFilePath, remoteFileName, monitor);// modemode可选值为ChannelSftp.OVERWRITEChannelSftp.RESUMEChannelSftp.APPEND/* 上传到远程目录并重命名为remoteFileName, 带进度、断点续传 */sftp.put(uploadLocalFilePath, remoteFileName, monitor, ChannelSftp.RESUME );log.info(File transfer(upload) completed successfully.);long end System.currentTimeMillis();log.info( time cost: {} ms, req url sftp://{}{}, , end-start, host, remoteFilePath);log.info( localFilePath:{}, , uploadLocalFilePath);// 校验并删除单元测试不留痕Assertions.assertTrue( ftpHelper.isFileExist(remoteFilePath) );SetString set new HashSetString();set.add(remoteFilePath);ftpHelper.deleteFiles(set);} catch (Exception e){log.error(文件上传失败 : , e);throw e;}finally {pool.returnSftpClient(sftp); // 归还到对象池}}/*** 使用 jsch* sftp文件下载普通下载覆盖* 远程路径downloadRemoteFilePath eg/root/tmp/sftpdir/工作JUDE_v5测试.zip* 本地路径localFilePath eg /Users/brickman/tmp/ unitTestMethodName-测试.zip;*/TestDisabledpublic void testDownload() throws Exception {String method Thread.currentThread().getStackTrace()[1].getMethodName();String localFileName method-测试.zip;String localFilePath localDir/localFileName;long start System.currentTimeMillis();ChannelSftp sftp pool.getSftpClient();// 用于调用统一封装的方法try{// 切换本地目录log.info(sftp.lpwd():{},sftp.lpwd());log.info(sftp.pwd():{},sftp.pwd());sftp.lcd(localDir);log.info(sftp.lpwd():{},sftp.lpwd());log.info(sftp.pwd():{},sftp.pwd());// 文件传输模式为modemode可选值为ChannelSftp.OVERWRITEChannelSftp.RESUMEChannelSftp.APPEND// 下载文件 // sftp.get( remoteFilePath ); // 这个并不是下载到默认目录而是返回一个流 // sftp.get(remoteFilePath, monitor, mode);sftp.get(downloadRemoteFilePath, localFileName); // 下载到本地目录并重命名为 localFileName // sftp.get(remoteFilePath, localFileName, monitor, mode);log.info(File transfer(download) completed successfully.);long end System.currentTimeMillis();log.info( time cost: {} ms, req url sftp://{}{}, , end-start, host, downloadRemoteFilePath);log.info( localFilePath:{}, , localFilePath);// 校验并删除单元测试不留痕Assertions.assertTrue( new File(localFilePath).exists() );Files.delete( new File(localFilePath).toPath() );}catch (Exception e){log.error(文件下载失败 : , e);throw e;}finally {pool.returnSftpClient(sftp); // 归还到对象池}}/*** 文件下载* 使用 jsch* 带进度监控带断点续传* 远程路径downloadRemoteFilePath eg/root/tmp/sftpdir/工作JUDE_v5测试.zip* 本地路径localFilePath eg /Users/brickman/tmp/ unitTestMethodName-测试.zip;*/Testpublic void testDownloadWithProgressMonitorWithRESUME2() throws Exception {String method Thread.currentThread().getStackTrace()[1].getMethodName();String localFileName method-测试.zip;String localFilePath localDir/localFileName;long start System.currentTimeMillis();ChannelSftp sftp pool.getSftpClient();// 使用实现了SftpProgressMonitor接口的monitor对象来监控文件传输的进度SftpProgressMonitor monitor new FileProgressMonitor();try{// 切换本地目录log.info(sftp.lpwd():{},sftp.lpwd());log.info(sftp.pwd():{},sftp.pwd());sftp.lcd(localDir);log.info(sftp.lpwd():{},sftp.lpwd());log.info(sftp.pwd():{},sftp.pwd());// 文件传输模式为modemode可选值为ChannelSftp.OVERWRITEChannelSftp.RESUMEChannelSftp.APPEND/* 下载到本地目录并重命名为 localFileName 带进度监控、断点续传 */sftp.get(downloadRemoteFilePath, localFileName, monitor, ChannelSftp.RESUME);log.info(File transfer(download) completed successfully.);long end System.currentTimeMillis();log.info( time cost: {} ms, req url sftp://{}{}, , end-start, host, downloadRemoteFilePath);log.info( localFilePath:{}, , localFilePath);// 校验并删除单元测试不留痕Assertions.assertTrue( new File(localFilePath).exists() );Files.delete( new File(localFilePath).toPath() );}catch (Exception e){log.error(文件下载失败 : , e);throw e;}finally {pool.returnSftpClient(sftp); // 归还到对象池}} }六、总结 1、第五篇为SFTP进阶篇讲SFTP池化处理SFTP客户端连接池封装单元测试类全是干货 2、【重点】带池上传支持断点续传和进度监控的单元测试方法testUploadWithProgressMonitorWithRESUME   3、【重点】带池下载支持断点续传和进度监控的单元测试方法testDownloadWithProgerssMonitorWithRESUME   4、请务必阅读前面的“篇章内容说明”以便精准命中读者需求