返回信息流package rt;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintStream;
import java.io.UnsupportedEncodingException;
import org.apache.commons.net.telnet.TelnetClient;
/**
* Telnet操作器,基于commons-net-2.2.jar
* @author JiangKunpeng
*
*/
public class TelnetOperator {
private String prompt = ">"; //结束标识字符串,Windows中是>,Linux中是#
private char promptChar = '>'; //结束标识字符
private TelnetClient telnet;
private InputStream in; // 输入流,接收返回信息
private PrintStream out; // 向服务器写入 命令
/**
* @param termtype 协议类型：VT100、VT52、VT220、VTNT、ANSI
* @param prompt 结果结束标识
*/
public TelnetOperator(String termtype,String prompt){
telnet = new TelnetClient(termtype);
setPrompt(prompt);
}
public TelnetOperator(String termtype){
telnet = new TelnetClient(termtype);
}
public TelnetOperator(){
telnet = new TelnetClient();
}
/**
* 登录到目标主机
* @param ip
* @param port
* @param username
* @param password
*/
public void login(String ip, int port, String username, String password){
try {
telnet.connect(ip, port);
in = telnet.getInputStream();
out = new PrintStream(telnet.getOutputStream());
readUntil("Username:");
write(username);
readUntil("Password:");
write(password);
String rs = readUntil(null);
if(rs!=null&&rs.contains("Login Failed")){
throw new RuntimeException("登录失败");
}
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* 读取分析结果
*
* @param pattern 匹配到该字符串时返回结果
* @return
*/
public String readUntil(String pattern) {
StringBuffer sb = new StringBuffer();
try {
char lastChar = (char)-1;
boolean flag = pattern!=null&&pattern.length()>0;
if(flag)
lastChar = pattern.charAt(pattern.length() - 1);
char ch;
int code = -1;
while ((code = in.read()) != -1) {
ch = (char)code;
sb.append(ch);
//匹配到结束标识时返回结果
if (flag) {
if (ch == lastChar && sb.toString().endsWith(pattern)) {
return sb.toString();
}
}else{
//如果没指定结束标识,匹配到默认结束标识字符时返回结果
if(ch == promptChar)
return sb.toString();
}
//登录失败时返回结果
if(sb.toString().contains("Login Failed")){
return sb.toString();
}
}
} catch (Exception e) {
e.printStackTrace();
}
return sb.toString();
}
/**
* 发送命令
*
* @param value
*/
public void write(String value) {
try {
out.println(value);
out.flush();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 发送命令,返回执行结果
*
* @param command
* @return
*/
public String sendCommand(String command) {
try {
write(command);
return readUntil(prompt);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* 关闭连接
*/
public void distinct(){
try {
if(telnet!=null&&!telnet.isConnected())
telnet.disconnect();
} catch (IOException e) {
e.printStackTrace();
}
}
public void setPrompt(String prompt) {
if(prompt!=null){
this.prompt = prompt;
this.promptChar = prompt.charAt(prompt.length()-1);
}
}
public static void main(String[] args) {
TelnetOperator telnet = new TelnetOperator("VT220",">"); //Windows,用VT220,否则会乱码
telnet.login("192.168.6.12", 23, "zx", "123456789");
String Password="zxr10";
String s = telnet.sendCommand("enable");
System.out.println(s);
//telnet.distinct();
/*String rs = telnet.sendCommand("enable");
//telnet.sendCommand("zxr10");
String s=telnet.sendCommand("show ip route");*/
}
}
代码如上，通过telnet连接路由器时，报错
java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(SocketInputStream.java:196)
at java.net.SocketInputStream.read(SocketInputStream.java:122)
at java.io.BufferedInputStream.read1(BufferedInputStream.java:273)
at java.io.BufferedInputStream.read(BufferedInputStream.java:334)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
at java.io.BufferedInputStream.read(BufferedInputStream.java:254)
at org.apache.commons.net.telnet.TelnetInputStream.__read(TelnetInputStream.java:114)
at org.apache.commons.net.telnet.TelnetInputStream.run(TelnetInputStream.java:535)
at java.lang.Thread.run(Thread.java:744)
在windows命令行里通过telnet可以登上，代码里不行
求大神指点
这是一条镜像帖。来源：北邮人论坛 / java / #41170同步于 2015/5/27
Java机器人发帖
通过java代码远程访问路由器的问题，在windows命令行里通过teln
Direwolf
2015/5/27镜像同步0 回复
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