一、非免密环境
Java的runtime机制实现远程（本地）linux命令或者shell脚本调用，并以字符串返回执行结果。具体代码如下：
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import org.apache.commons.lang.StringUtils;
import ch.ethz.ssh2.Connection;
import ch.ethz.ssh2.Session;
import ch.ethz.ssh2.StreamGobbler;
/**
* 远程（本地）执行linux的命令或者shell
* @author damocle
*/
public class ExecuteRuntimeCommand2 {
//字符编码默认是utf-8
private static String DEFAULTCHART="UTF-8";
private Connection conn;
private String ip;
private String userName;
private String userPwd;
public ExecuteRuntimeCommand2(String ip, String userName, String userPwd) {
this.ip = ip;
this.userName = userName;
this.userPwd = userPwd;
}
public ExecuteRuntimeCommand2() {
}
/**
* 远程登录linux的主机
* @author damocle
* @since V0.1
* @return
* 登录成功返回true，否则返回false
*/
public Boolean login(){
boolean flg=false;
try {
conn = new Connection(ip);
conn.connect();//连接
flg=conn.authenticateWithPassword(userName, userPwd);//认证
} catch (IOException e) {
e.printStackTrace();
}
return flg;
}
/**
* @author damocle
* 远程执行shll脚本或者命令
* @param cmd
* 即将执行的命令
* @return
* 命令执行完后返回的结果值
* @since V0.1
*/
public String execute(String cmd){
String result="";
try {
if(login()){
Session session= conn.openSession();//打开一个会话
session.execCommand(cmd);//执行命令
result=processStdout(session.getStdout(),DEFAULTCHART);
//如果为得到标准输出为空，说明脚本执行出错了
if(StringUtils.isBlank(result)){
result=processStdout(session.getStderr(),DEFAULTCHART);
}
conn.close();
session.close();
}
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
/**
* 调用本地linux
* @param cmd
* @return
*/
public String executeLocal(String command){
String result = null;
try {
String[] cmd = new String[]{"/bin/sh", "-c",command};
Process ps = Runtime.getRuntime().exec(cmd);
BufferedReader br = new BufferedReader(new InputStreamReader(ps.getInputStream()));
StringBuffer sb = new StringBuffer();
String line;
while ((line = br.readLine()) != null) {
//执行结果加上回车
sb.append(line).append("\n");
}
result = sb.toString();
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
/**
* @author damocle
* 远程执行shll脚本或者命令
* @param cmd
* 即将执行的命令
* @return
* 命令执行成功后返回的结果值，如果命令执行失败，返回空字符串，不是null
* @since V0.1
*/
public String executeSuccess(String cmd){
String result="";
try {
if(login()){
Session session= conn.openSession();//打开一个会话
session.execCommand(cmd);//执行命令
result=processStdout(session.getStdout(),DEFAULTCHART);
conn.close();
session.close();
}
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
/**
* 解析脚本执行返回的结果集
* @author damocle
* @param in 输入流对象
* @param charset 编码
* @since V0.1
* @return
* 以纯文本的格式返回
*/
private String processStdout(InputStream in, String charset){
InputStream stdout = new StreamGobbler(in);
StringBuffer buffer = new StringBuffer();;
try {
BufferedReader br = new BufferedReader(new InputStreamReader(stdout,charset));
String line=null;
while((line=br.readLine()) != null){
buffer.append(line+"\n");
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return buffer.toString();
}
public static void setCharset(String charset) {
DEFAULTCHART = charset;
}
public Connection getConn() {
return conn;
}
public void setConn(Connection conn) {
this.conn = conn;
}
public String getIp() {
return ip;
}
public void setIp(String ip) {
this.ip = ip;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getUserPwd() {
return userPwd;
}
public void setUserPwd(String userPwd) {
this.userPwd = userPwd;
}
}
二、免密环境
1、添加Jar包依赖
<dependency>
<groupId>com.jcraft</groupId>
<artifactId>jsch</artifactId>
<version>0.1.54</version>
</dependency>
2、代码实例
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import com.jcraft.jsch.Channel;
import com.jcraft.jsch.ChannelExec;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.JSchException;
import com.jcraft.jsch.Session;
public class ConnectionSSH {
public static void main(String[] args) throws JSchException, IOException {
JSch jsch = new JSch();
String pubKeyPath = "C:\\Users\\yutao\\.ssh\\id_rsa";
jsch.addIdentity(pubKeyPath);
String username = "yutao";
String host = "192.168.116.131";
Session session=jsch.getSession(username, host, 22);//为了连接做准备
session.setConfig("StrictHostKeyChecking", "no");
session.connect();
String command = "./test.sh";
// Channel channel=session.openChannel("shell");
ChannelExec channel=(ChannelExec)session.openChannel("exec");
channel.setCommand(command);
// channel.setInputStream(System.in);
// channel.setOutputStream(System.out);
// InputStream in=channel.getInputStream();
BufferedReader in = new BufferedReader(new InputStreamReader(channel.getInputStream()));
channel.connect();
String msg;
while((msg = in.readLine()) != null){
System.out.println(msg);
}
channel.disconnect();
session.disconnect();
}
Linux服务器免密登录生成的id_rsa我拷贝一份到了windows，所以路径为"C:\\Users\\yutao\\.ssh\\id_rsa"，如果代码执行在Linux环境，可以直接设置id_rsa路径/root/.ssh/id_rsa。测试通过，完事！
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