使用JSch上传Java SFTP，但如何覆盖当前文件？

Question

I am trying to upload two files to a server with SFTP using JSch. It works fine to upload the files if the directory is empty but I want to upload the same file over and over (just changing an id inside) but I can't figure out how to do this. There is some static parameter in JSch called OVERWRITE but I can't find out how to use it.

Anyone care to show me how I should add this setting?

This is my current code:

public void upload() {
  try {
    JSch jsch = new JSch();
session = jsch.getSession(SFTPUSER, SFTPHOST, SFTPPORT);
session.setPassword(SFTPPASS);
java.util.Properties config = new java.util.Properties();
config.put("StrictHostKeyChecking", "no");
session.setConfig(config);
session.connect();
channel = session.openChannel("sftp");
channel.connect();
channelSftp = (ChannelSftp) channel;
channelSftp.cd(SFTPWORKINGDIR);

    File f1 = new File("ext_files/" + FILETOTRANSFER1);
channelSftp.put(new FileInputStream(f1), f1.getName());
File f2 = new File("ext_files/" + FILETOTRANSFER2);
channelSftp.put(new FileInputStream(f2), f2.getName());

channelSftp.exit();
session.disconnect();
} catch (Exception ex) {
  ex.printStackTrace();
  }
}

Answer 1

我从来没有使用过JSch，但从它的外观来看，有一些重载的put方法，其中一个匹配你当前的签名，添加了一个“mode”参数，并且在ChannelSftp类中似乎有三个静态模式参数（OVERWRITE = 0，RESUME = 1，APPEND = 2）所以你应该可以使用：

channelSftp.put(new FileInputStream(f1), f1.getName(), ChannelSftp.OVERWRITE);