java - 如何使用SCP将文件内容直接从本地流对象推送到远程文件到远程文件

Question

如何使用SCP将文件内容直接从本地流对象推送到远程文件，而不需要将文件临时存储在本地磁盘上？

目前我正在本地创建流并尝试直接推送到远程服务器它能够成功建立 session 但是 channel.isConnected 变得错误，远程文件没有被创建，请帮助。

    Runtime rt = Runtime.getRuntime();
    BufferedWriter out= new BufferedWriter(new FileWriter(f));
    Process proc = rt.exec(cmd);       
    BufferedReader stdInput = new BufferedReader(new 
         InputStreamReader(proc.getInputStream()));
    BufferedReader stdError = new BufferedReader(new 
         InputStreamReader(proc.getErrorStream()));

    //Intiate SCP connection

    JSch jsch=new JSch();
    jsch.setConfig("StrictHostKeyChecking", "no");
    Session session=jsch.getSession("userName", "scpServer", 22);        
    UserInfo ui=new MyUserInfo(); //Passing password from this class
    session.setUserInfo(ui);
    session.connect();

    String rfile="/home/npachava/SCPTest/myTest.bson";
    // exec 'scp -f rfile' remotely
    String command="scp -f "+rfile;
    Channel channel=session.openChannel("exec");
    ((ChannelExec)channel).setCommand(command);
    System.out.println("session.getServerVersion()"+session.getServerVersion());;
    System.out.println("session.isConnected() "+session.isConnected());
    System.out.println("channel.isConnected() "+channel.isConnected());
    // get I/O streams for remote scp
    OutputStream outScp=channel.getOutputStream();
    InputStream inScp=channel.getInputStream();

    channel.connect();

    // read the output from the command
    System.out.println("standard output of the command:\n");
    String s = null;
    while ((s = stdInput.readLine()) != null) {
        System.out.println(s);
        out.write(s);
        byte[] b = s.getBytes();
        System.out.println("Bytes Length"+b.length);
        outScp.write(b);



    }
    System.out.println("OutPutSCP"+outScp);
    // read any errors from the attempted command
    System.out.println("standard error of the command (if any):\n");
    while ((s = stdError.readLine()) != null) {
        System.out.println(s);
    }
    out.close();
    outScp.flush();
    outScp.close();
    channel.disconnect();
    session.disconnect();
}

我指的是 http://www.jcraft.com/jsch/examples/ScpTo.java.html 中提到的示例

Answer 1

只需使用您的内存流而不是 FileInputStream。

在这一行(ScpTo.java 代码，不是上面的代码)中，将您的“本地”流对象(例如 ByteArrayInputStream)分配给 fis，而不是创建 FileInputStream。

fis=new FileInputStream(lfile);

确保您首先从头开始搜索您的流。