用于Java的SSH库
有没有人有使用Java的SSH库连接的例子。这是一个非常流行的库，由maven、ant和eclipse使用。它是开源的，具有BSD风格的许可证。看看最近发布的，它基于Apache MINA项目。更新：GSOC项目和那里的代码没有激活，但这是： hierynomus自2015年初开始担任维护者。以下是旧的、不再维护的Github链接：用于Java的SSH库,java,ssh,ssh-tunnel,Java,Ssh,Ssh Tunnel,有没有人有使用Java的SSH库连接的例子。这是一个非常流行的库，由maven、ant和eclipse使用。它是开源的，具有BSD风格的许可证。看看最近发布的，它基于Apache MINA项目。更新：GSOC项目和那里的代码没有激活，但这是： hierynomus自2015年初开始担任维护者。以下是旧的、不再维护的Github链接： 有一个GSOC项目： 代码质量似乎比JSch好，JSch虽然是一个完整的、有效的实现，但缺乏文档。Project page发布了一个即将发布的测试版，最后一
有一个GSOC项目： 代码质量似乎比JSch好，JSch虽然是一个完整的、有效的实现，但缺乏文档。Project page发布了一个即将发布的测试版，最后一次提交到存储库是在8月中旬 比较API：
Session=null；
通道=空；
试一试{
JSch JSch=新的JSch（）；
session=jsch.getSession（用户名，主机，22）；
java.util.Properties config=new java.util.Properties（）；
配置放置（“检查”、“否”）；
session.setConfig（config）；
session.setPassword（密码）；
session.connect（）；
//远程执行“scp-f文件”
String command=“scp-f”+remoteFilename；
channel=session.openChannel（“exec”）；
（（ChannelExec）channel）.setCommand（command）；
//获取远程scp的I/O流
OutputStream out=channel.getOutputStream（）；
InputStream in=channel.getInputStream（）；
channel.connect（）；
字节[]buf=新字节[1024]；
//发送“\0”
buf[0]=0；
out.write（buf，0，1）；
out.flush（）；
while（true）{
int c=签入（in）；
如果（c！=“c”）{
打破
}
//读‘0644’
in.read（buf，0，5）；
长文件大小=0L；
while（true）{
if（in.read（buf，0，1）<0）{
//错误
打破
}
如果（buf[0]=''）{
打破
}
filesize=filesize*10L+（长）（buf[0]-“0”）；
}
字符串文件=null；
对于（int i=0；i++）{
in.read（buf，i，1）；
if（buf[i]==（字节）0x0a）{
file=新字符串（buf，0，i）；
打破
}
}
//发送“\0”
buf[0]=0；
out.write（buf，0，1）；
out.flush（）；
//阅读lfile的内容
FileOutputStream=null；
fos=新文件输出流（localFilename）；
int foo；
while（true）{
if（buf.length<文件大小）{
foo=buf.长度；
}否则{
foo=（int）文件大小；
}
foo=in.read（buf，0，foo）；
如果（foo<0）{
//错误
打破
}
fos.write（buf，0，foo）；
filesize-=foo；
如果（文件大小==0L）{
打破
}
}
fos.close（）；
fos=null；
如果（检查确认（in）！=0）{
系统出口（0）；
}
//发送“\0”
buf[0]=0；
out.write（buf，0，1）；
out.flush（）；
通道断开（）；
session.disconnect（）；
}
}捕获（JSCHEException jsche）{
System.err.println（jsche.getLocalizedMessage（））；
}捕获（ioe异常ioe）{
System.err.println（ioe.getLocalizedMessage（））；
}最后{
通道断开（）；
session.disconnect（）；
}
}
package examples;
import com.jcraft.jsch.*;
import java.io.*;
import java.util.*;
public class ScpFrom2 {
public static void main(String[] args) throws Exception {
Map<String,String> params = parseParams(args);
if (params.isEmpty()) {
System.err.println("usage: java ScpFrom2 "
+ " user=myid password=mypwd"
+ " host=myhost.com port=22"
+ " encoding=<ISO-8859-1,UTF-8,...>"
+ " \"remotefile1=/some/file.png\""
+ " \"localfile1=file.png\""
+ " \"remotefile2=/other/file.txt\""
+ " \"localfile2=file.txt\""
);
return;
}
// default values
if (params.get("port") == null)
params.put("port", "22");
if (params.get("encoding") == null)
params.put("encoding", "ISO-8859-1"); //"UTF-8"
Session session = null;
try {
JSch jsch=new JSch();
session=jsch.getSession(
params.get("user"), // myuserid
params.get("host"), // my.server.com
Integer.parseInt(params.get("port")) // 22
);
session.setPassword( params.get("password") );
session.setConfig("StrictHostKeyChecking", "no"); // do not prompt for server signature
session.connect();
// this is exec command and string reply encoding
String encoding = params.get("encoding");
int fileIdx=0;
while(true) {
fileIdx++;
String remoteFile = params.get("remotefile"+fileIdx);
String localFile = params.get("localfile"+fileIdx);
if (remoteFile == null || remoteFile.equals("")
|| localFile == null || localFile.equals("") )
break;
remoteFile = filenameHack(remoteFile);
localFile = filenameHack(localFile);
try {
downloadFile(session, remoteFile, localFile, encoding);
} catch (Exception ex) {
ex.printStackTrace();
}
}
} catch(Exception ex) {
ex.printStackTrace();
} finally {
try{ session.disconnect(); } catch(Exception ex){}
}
}
private static void downloadFile(Session session,
String remoteFile, String localFile, String encoding) throws Exception {
// send exec command: scp -p -f "/some/file.png"
// -p = read file timestamps
// -f = From remote to local
String command = String.format("scp -p -f \"%s\"", remoteFile);
System.console().printf("send command: %s%n", command);
Channel channel=session.openChannel("exec");
((ChannelExec)channel).setCommand(command.getBytes(encoding));
// get I/O streams for remote scp
byte[] buf=new byte[32*1024];
OutputStream out=channel.getOutputStream();
InputStream in=channel.getInputStream();
channel.connect();
buf[0]=0; out.write(buf, 0, 1); out.flush(); // send '\0'
// reply: T<mtime> 0 <atime> 0\n
// times are in seconds, since 1970-01-01 00:00:00 UTC
int c=checkAck(in);
if(c!='T')
throw new IOException("Invalid timestamp reply from server");
long tsModified = -1; // millis
for(int idx=0; ; idx++){
in.read(buf, idx, 1);
if(tsModified < 0 && buf[idx]==' ') {
tsModified = Long.parseLong(new String(buf, 0, idx))*1000;
} else if(buf[idx]=='\n') {
break;
}
}
buf[0]=0; out.write(buf, 0, 1); out.flush(); // send '\0'
// reply: C0644 <binary length> <filename>\n
// length is given as a text "621873" bytes
c=checkAck(in);
if(c!='C')
throw new IOException("Invalid filename reply from server");
in.read(buf, 0, 5); // read '0644 ' bytes
long filesize=-1;
for(int idx=0; ; idx++){
in.read(buf, idx, 1);
if(buf[idx]==' ') {
filesize = Long.parseLong(new String(buf, 0, idx));
break;
}
}
// read remote filename
String origFilename=null;
for(int idx=0; ; idx++){
in.read(buf, idx, 1);
if(buf[idx]=='\n') {
origFilename=new String(buf, 0, idx, encoding); // UTF-8, ISO-8859-1
break;
}
}
System.console().printf("size=%d, modified=%d, filename=%s%n"
, filesize, tsModified, origFilename);
buf[0]=0; out.write(buf, 0, 1); out.flush(); // send '\0'
// read binary data, write to local file
FileOutputStream fos = null;
try {
File file = new File(localFile);
fos = new FileOutputStream(file);
while(filesize > 0) {
int read = Math.min(buf.length, (int)filesize);
read=in.read(buf, 0, read);
if(read < 0)
throw new IOException("Reading data failed");
fos.write(buf, 0, read);
filesize -= read;
}
fos.close(); // we must close file before updating timestamp
fos = null;
if (tsModified > 0)
file.setLastModified(tsModified);
} finally {
try{ if (fos!=null) fos.close(); } catch(Exception ex){}
}
if(checkAck(in) != 0)
return;
buf[0]=0; out.write(buf, 0, 1); out.flush(); // send '\0'
System.out.println("Binary data read");
}
private static int checkAck(InputStream in) throws IOException {
// b may be 0 for success
// 1 for error,
// 2 for fatal error,
// -1
int b=in.read();
if(b==0) return b;
else if(b==-1) return b;
if(b==1 || b==2) {
StringBuilder sb=new StringBuilder();
int c;
do {
c=in.read();
sb.append((char)c);
} while(c!='\n');
throw new IOException(sb.toString());
}
return b;
}
/**
* Parse key=value pairs to hashmap.
* @param args
* @return
*/
private static Map<String,String> parseParams(String[] args) throws Exception {
Map<String,String> params = new HashMap<String,String>();
for(String keyval : args) {
int idx = keyval.indexOf('=');
params.put(
keyval.substring(0, idx),
keyval.substring(idx+1)
);
}
return params;
}
private static String filenameHack(String filename) {
// It's difficult reliably pass unicode input parameters
// from Java dos command line.
// This dirty hack is my very own test use case.
if (filename.contains("${filename1}"))
filename = filename.replace("${filename1}", "Korilla ABC ÅÄÖ.txt");
else if (filename.contains("${filename2}"))
filename = filename.replace("${filename2}", "test2 ABC ÅÄÖ.txt");
return filename;
}
}
包示例；
导入com.jcraft.jsch.*；
导入java.io.*；
导入java.util.*；
公共类ScpFrom2{
公共静态void main（字符串[]args）引发异常{
Map params=parseParams（args）；
if（params.isEmpty（））{
System.err.println（“用法：Javascpfrom2”
+“user=myid password=mypwd”
+“主机=myhost.com端口=22”
+“编码=”
+“\“remotefile1=/some/file.png”
+“\“localfile1=file.png”
+“\“remotefile2=/other/file.txt”
+“\“localfile2=file.txt”
);
返回；
}
//默认值
if（params.get（“端口”）==null）
参数put（“端口”，“22”）；
if（params.get（“encoding”）==null）
参数put（“编码”、“ISO-8859-1”）；/“UTF-8”
会话=空；
试一试{
JSch JSch=新的JSch（）；
session=jsch.getSession(
params.get（“用户”），//myuserid
params.get（“主机”），//my.server.com
Integer.parseInt（params.get（“port”）//22
);
session.setPassword（params.get（“password”）；
session.setConfig（“StrictHostKeyChecking”，“no”）；//不提示输入服务器签名
session.connect（）；
//这是exec命令和字符串应答编码
字符串编码=params.get（“编码”）；
int fileIdx=0；
while（true）{
fileIdx++；
字符串remoteFile=params.get（“remoteFile”+fileIdx）；
字符串localFile=params.get（“localFile”+fileIdx）；
if（remoteFile==null | | remoteFile.equals（“”）
||localFile==null | | localFile.equals（“”）
打破
remoteFile=filenameHack（remoteFile）；
localFile=filenameHa
Session session = null;
Channel channel = null;
try {
JSch jsch = new JSch();
session = jsch.getSession(username, host, 22);
java.util.Properties config = new java.util.Properties();
config.put("StrictHostKeyChecking", "no");
session.setConfig(config);
session.setPassword(password);
session.connect();
// exec 'scp -f rfile' remotely
String command = "scp -f " + remoteFilename;
channel = session.openChannel("exec");
((ChannelExec) channel).setCommand(command);
// get I/O streams for remote scp
OutputStream out = channel.getOutputStream();
InputStream in = channel.getInputStream();
channel.connect();
byte[] buf = new byte[1024];
// send '\0'
buf[0] = 0;
out.write(buf, 0, 1);
out.flush();
while (true) {
int c = checkAck(in);
if (c != 'C') {
break;
}
// read '0644 '
in.read(buf, 0, 5);
long filesize = 0L;
while (true) {
if (in.read(buf, 0, 1) < 0) {
// error
break;
}
if (buf[0] == ' ') {
break;
}
filesize = filesize * 10L + (long) (buf[0] - '0');
}
String file = null;
for (int i = 0;; i++) {
in.read(buf, i, 1);
if (buf[i] == (byte) 0x0a) {
file = new String(buf, 0, i);
break;
}
}
// send '\0'
buf[0] = 0;
out.write(buf, 0, 1);
out.flush();
// read a content of lfile
FileOutputStream fos = null;
fos = new FileOutputStream(localFilename);
int foo;
while (true) {
if (buf.length < filesize) {
foo = buf.length;
} else {
foo = (int) filesize;
}
foo = in.read(buf, 0, foo);
if (foo < 0) {
// error
break;
}
fos.write(buf, 0, foo);
filesize -= foo;
if (filesize == 0L) {
break;
}
}
fos.close();
fos = null;
if (checkAck(in) != 0) {
System.exit(0);
}
// send '\0'
buf[0] = 0;
out.write(buf, 0, 1);
out.flush();
channel.disconnect();
session.disconnect();
}
} catch (JSchException jsche) {
System.err.println(jsche.getLocalizedMessage());
} catch (IOException ioe) {
System.err.println(ioe.getLocalizedMessage());
} finally {
channel.disconnect();
session.disconnect();
}
}
package examples;
import com.jcraft.jsch.*;
import java.io.*;
import java.util.*;
public class ScpFrom2 {
public static void main(String[] args) throws Exception {
Map<String,String> params = parseParams(args);
if (params.isEmpty()) {
System.err.println("usage: java ScpFrom2 "
+ " user=myid password=mypwd"
+ " host=myhost.com port=22"
+ " encoding=<ISO-8859-1,UTF-8,...>"
+ " \"remotefile1=/some/file.png\""
+ " \"localfile1=file.png\""
+ " \"remotefile2=/other/file.txt\""
+ " \"localfile2=file.txt\""
);
return;
}
// default values
if (params.get("port") == null)
params.put("port", "22");
if (params.get("encoding") == null)
params.put("encoding", "ISO-8859-1"); //"UTF-8"
Session session = null;
try {
JSch jsch=new JSch();
session=jsch.getSession(
params.get("user"), // myuserid
params.get("host"), // my.server.com
Integer.parseInt(params.get("port")) // 22
);
session.setPassword( params.get("password") );
session.setConfig("StrictHostKeyChecking", "no"); // do not prompt for server signature
session.connect();
// this is exec command and string reply encoding
String encoding = params.get("encoding");
int fileIdx=0;
while(true) {
fileIdx++;
String remoteFile = params.get("remotefile"+fileIdx);
String localFile = params.get("localfile"+fileIdx);
if (remoteFile == null || remoteFile.equals("")
|| localFile == null || localFile.equals("") )
break;
remoteFile = filenameHack(remoteFile);
localFile = filenameHack(localFile);
try {
downloadFile(session, remoteFile, localFile, encoding);
} catch (Exception ex) {
ex.printStackTrace();
}
}
} catch(Exception ex) {
ex.printStackTrace();
} finally {
try{ session.disconnect(); } catch(Exception ex){}
}
}
private static void downloadFile(Session session,
String remoteFile, String localFile, String encoding) throws Exception {
// send exec command: scp -p -f "/some/file.png"
// -p = read file timestamps
// -f = From remote to local
String command = String.format("scp -p -f \"%s\"", remoteFile);
System.console().printf("send command: %s%n", command);
Channel channel=session.openChannel("exec");
((ChannelExec)channel).setCommand(command.getBytes(encoding));
// get I/O streams for remote scp
byte[] buf=new byte[32*1024];
OutputStream out=channel.getOutputStream();
InputStream in=channel.getInputStream();
channel.connect();
buf[0]=0; out.write(buf, 0, 1); out.flush(); // send '\0'
// reply: T<mtime> 0 <atime> 0\n
// times are in seconds, since 1970-01-01 00:00:00 UTC
int c=checkAck(in);
if(c!='T')
throw new IOException("Invalid timestamp reply from server");
long tsModified = -1; // millis
for(int idx=0; ; idx++){
in.read(buf, idx, 1);
if(tsModified < 0 && buf[idx]==' ') {
tsModified = Long.parseLong(new String(buf, 0, idx))*1000;
} else if(buf[idx]=='\n') {
break;
}
}
buf[0]=0; out.write(buf, 0, 1); out.flush(); // send '\0'
// reply: C0644 <binary length> <filename>\n
// length is given as a text "621873" bytes
c=checkAck(in);
if(c!='C')
throw new IOException("Invalid filename reply from server");
in.read(buf, 0, 5); // read '0644 ' bytes
long filesize=-1;
for(int idx=0; ; idx++){
in.read(buf, idx, 1);
if(buf[idx]==' ') {
filesize = Long.parseLong(new String(buf, 0, idx));
break;
}
}
// read remote filename
String origFilename=null;
for(int idx=0; ; idx++){
in.read(buf, idx, 1);
if(buf[idx]=='\n') {
origFilename=new String(buf, 0, idx, encoding); // UTF-8, ISO-8859-1
break;
}
}
System.console().printf("size=%d, modified=%d, filename=%s%n"
, filesize, tsModified, origFilename);
buf[0]=0; out.write(buf, 0, 1); out.flush(); // send '\0'
// read binary data, write to local file
FileOutputStream fos = null;
try {
File file = new File(localFile);
fos = new FileOutputStream(file);
while(filesize > 0) {
int read = Math.min(buf.length, (int)filesize);
read=in.read(buf, 0, read);
if(read < 0)
throw new IOException("Reading data failed");
fos.write(buf, 0, read);
filesize -= read;
}
fos.close(); // we must close file before updating timestamp
fos = null;
if (tsModified > 0)
file.setLastModified(tsModified);
} finally {
try{ if (fos!=null) fos.close(); } catch(Exception ex){}
}
if(checkAck(in) != 0)
return;
buf[0]=0; out.write(buf, 0, 1); out.flush(); // send '\0'
System.out.println("Binary data read");
}
private static int checkAck(InputStream in) throws IOException {
// b may be 0 for success
// 1 for error,
// 2 for fatal error,
// -1
int b=in.read();
if(b==0) return b;
else if(b==-1) return b;
if(b==1 || b==2) {
StringBuilder sb=new StringBuilder();
int c;
do {
c=in.read();
sb.append((char)c);
} while(c!='\n');
throw new IOException(sb.toString());
}
return b;
}
/**
* Parse key=value pairs to hashmap.
* @param args
* @return
*/
private static Map<String,String> parseParams(String[] args) throws Exception {
Map<String,String> params = new HashMap<String,String>();
for(String keyval : args) {
int idx = keyval.indexOf('=');
params.put(
keyval.substring(0, idx),
keyval.substring(idx+1)
);
}
return params;
}
private static String filenameHack(String filename) {
// It's difficult reliably pass unicode input parameters
// from Java dos command line.
// This dirty hack is my very own test use case.
if (filename.contains("${filename1}"))
filename = filename.replace("${filename1}", "Korilla ABC ÅÄÖ.txt");
else if (filename.contains("${filename2}"))
filename = filename.replace("${filename2}", "test2 ABC ÅÄÖ.txt");
return filename;
}
}