java附件上传功能实现(java大文件上传插件)
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
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。
