目前我可以使用JSch库在SSH会话中执行远程命令,如下所示:
JSch jsch = new JSch();
Session session = jsch.getSession(username, host, 22);
session.setPassword(password);
Properties config = new Properties();
config.put("StrictHostKeyChecking", "no");
session.setConfig(config);
session.connect();
ChannelExec channel = (ChannelExec) session.openChannel("exec");
BufferedReader in = new BufferedReader(new InputStreamReader(channel.getInputStream()));
channel.setCommand("ls -l");
channel.connect();
StringBuilder output = new StringBuilder();
String s = null;
while((s = in.readLine()) != null){
output.append(s + "\n");
}
System.out.println(output);
立即返回完整值的命令工作正常,但是一些交互式命令(如“Docker run”)每秒钟返回一次值(几分钟),而前面的代码只读取返回的第一个值
有没有办法读取命令返回的值?
修改
这是我现在的代码:
public String executeCommand(String cmd) {
try {
Channel channel = session.openChannel("shell");
OutputStream inputstream_for_the_channel = channel.getOutputStream();
PrintStream commander = new PrintStream(inputstream_for_the_channel, true);
channel.setOutputStream(System.out, true);
channel.connect();
commander.println(cmd);
commander.close();
do {
Thread.sleep(1000);
} while(!channel.isEOF());
} catch(Exception e) {
e.printStackTrace();
}
return null;
}
答案 0 :(得分:2)
实施JSch getInputStream
的方式,其read
似乎不仅会在会话/频道关闭时返回-1
,而且还会在暂时没有输入数据的情况下返回channel.isClosed()
您最好使用examples/Sudo.java
来测试会话/频道是否已关闭。见byte[] tmp=new byte[1024];
while(true){
while(in.available()>0){
int i=in.read(tmp, 0, 1024);
if(i<0)break;
System.out.print(new String(tmp, 0, i));
}
if(channel.isClosed()){
System.out.println("exit-status: "+channel.getExitStatus());
break;
}
try{Thread.sleep(1000);}catch(Exception ee){}
}
:
channel.setOutputStream(System.out, true);
你的代码用&#34; shell&#34; channel在控制台上打印输出,因为您已通过以下方式指示它:
SELECT * FROM `table` WHERE
field LIKE '%" . base64_encode($term) . "%'
OR field LIKE '%" . substr(base64_encode($term .'a'),0,-4) . "%'
OR field LIKE '%" . substr(base64_encode($term .'aa'),0,-8) . "%'
OR field LIKE '%" . substr(base64_encode($term .'aaa'),0,-12) . "%'
您必须实现输出流以写入字符串。见Get an OutputStream into a String
或者实际上,您应该能够使用与&#34; exec&#34;相同的代码。信道。