Java上传大文件 java 大文件上传解决方案 _Java上传大文件

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1、问题在项目开发过程中，遇到需要将页面上选择的文件上传至FTP服务器，遇到一些坑，比如上传文件中文名乱码，上传时指定上传目录不能自动创建等问题。
2、FTP上传文件工具类

public class FtpUtil {private String hostname = "xxx";private Integer port = 21 ;private String username = "xxx";private String password = "xxx";private FTPClient client = null;public String initialize() throws Exception{client = new FTPClient();client.setControlEncoding("utf-8");client.connect(hostname, port);client.login(username, password);int replyCode = client.getReplyCode();if(!FTPReply.isPositiveCompletion(replyCode))return "Connect ftp failed";return "success";}public String uploadFile(String storePath, String fileName, String uploadFile) throws Exception {InputStream stream = new FileInputStream(new File(uploadFile));client.setFileType(client.BINARY_FILE_TYPE);this.prepareStorePath(client, storePath);client.sendCommand("OPTS UTF8", "ON");client.storeFile(fileName, stream);if (client.storeFile(fileName, stream))return "Upload file success";return "Upload file failed";}private void prepareStorePath(FTPClient client, String storePath) throws Exception{String[] split = storePath.split("\\\\");for (String str : split) {if (StringUtils.isBlank(str))continue;if (!client.changeWorkingDirectory(str)) {client.makeDirectory(str);client.changeWorkingDirectory(str);}}}}

3、Application.java测试上传

public class Application {public static void main(String[] args) throws Exception {FtpUtil ftp = new FtpUtil();ftp.initialize();ftp.uploadFile("uploads", "W3School离线手册2017.chm", "F:\\ToolFile\\W3School离线手册2017.chm");}}

4、文件名中文乱码解决办法
client.sendCommand("OPTS UTF8", "ON");5、指定文件存储目录不能创建解决办法

private void prepareStorePath(FTPClient client, String storePath) throws Exception{String[] split = storePath.split("\\\\");for (String str : split) {if (StringUtils.isBlank(str))continue;if (!client.changeWorkingDirectory(str)) {client.makeDirectory(str);client.changeWorkingDirectory(str);}}}

路漫漫其修远兮，吾将上下而求索
【Java上传大文件 java 大文件上传解决方案】译文：在追寻真理方面，前方的道路还很漫长，但我将百折不挠，不遗余力地去追求和探索。