Ganymed ssh2 连接ftp server获取server的file

pom.xml

 <dependency>        <groupId>ch.ethz.ganymed</groupId>        <artifactId>ganymed-ssh2</artifactId>        <version>build210</version>    </dependency>

java代码片段

import java.util.StringTokenizer;
import ch.ethz.ssh2.Connection;
import ch.ethz.ssh2.Session;
import ch.ethz.ssh2.StreamGobbler;

public String runSftpConnect(HttpServletRequest request,String server,String port, String username, String password, String root,String fileName,int sku_no) throws Exception{
String EDIFile=""; 
Connection connection = null;
Session sess = null;
InputStream stdout = null;
BufferedReader stdoutReader = null;
        try {
        int ipPort = 2222;
        if(port!=null&&!"".equals(port)){
        ipPort = Integer.parseInt(port);
        }
            connection = new Connection(server,ipPort);
            connection.connect();
            boolean isAuthenticated = connection.authenticateWithPassword(username, password);
            if (!isAuthenticated) {
                throw new IOException("authentication failed");
            }


            sess = connection.openSession();  
//send commands.
String command = "";
StringBuffer output = new StringBuffer();

command =  "cd "+root+";egrep -l ~"+ sku_no+"~ "+fileName;

sess.execCommand(command);
stdout = new StreamGobbler(sess.getStdout());  
          InputStream stderr = new StreamGobbler(sess.getStderr());  
stdoutReader = new BufferedReader(  
                 new InputStreamReader(stdout));   
             
            while (true) {  
              String line = stdoutReader.readLine();  
              if(line!=null&&!"null".equals(line)){
             output.append(line);
              }else if (line == null) {
             break;
              }
            }


            String fileExist = "N";
       if ((output.indexOf(fileName) >=0) && (output.indexOf("egrep") == -1)) {
       fileExist = "Y"; 
       }
       sess.close();
       if("Y".equals(fileExist)){
       
       sess = connection.openSession();  
       
       command = "cd "+root+";grep ~"+ sku_no+"~ "+fileName;

sess.execCommand(command);
stdout = new StreamGobbler(sess.getStdout());
stdoutReader = new BufferedReader(  new InputStreamReader(stdout));   
output.setLength(0);
           while (true) {  
             String line = stdoutReader.readLine();  
             output.append(line);
               if (line == null)  
                   break;
           }  
           
           StringTokenizer st = new StringTokenizer(output.toString(), "\n");
           String tmp1 = ""; 
           while (st.hasMoreTokens()) {
             tmp1 = st.nextToken();
             if ((tmp1.indexOf(String.valueOf(sku_no))>=0) && (tmp1.indexOf("grep") == -1)){
             EDIFile = tmp1;
             break;
             }
           }
           
       }
       
       
      
} catch (Exception e) {
request.setAttribute("error", e);
throw e;
} finally {

if (EDIFile.equals("")){
        request.setAttribute("error", "There is no EDI raw data for this sku!");
       }

stdoutReader.close();
stdout.close();
sess.close();
connection.close();
}
        
        return EDIFile;
}