springboot通过ssh通道连接mysql数据库

navicat可以通过ssh通道连接mysql数据库，那java中如何实现了，springboot又该怎样集成呢？

1.添加包

　 <dependency>
        <groupId>com.jcraft</groupId>
        <artifactId>jsch</artifactId>
        <version>0.1.53</version>
    </dependency>

2.创建ssh连接工具类，连接到ssh server

import com.jcraft.jsch.JSch;
import com.jcraft.jsch.Session;

import java.util.Properties;

public class SSHConnection {

private final static String S_PATH_FILE_PRIVATE_KEY = "/Users/hdwang/.ssh/id_rsa";
private final static String S_PATH_FILE_KNOWN_HOSTS = "/Users/hdwang/.ssh/known_hosts";
private final static String S_PASS_PHRASE = "";
private final static int LOCAl_PORT = 3307;
private final static int REMOTE_PORT = 3306;
private final static int SSH_REMOTE_PORT = 1022;
private final static String SSH_USER = "zhangsan";
private final static String SSH_PASSWORD = "123456";
private final static String SSH_REMOTE_SERVER = "192.168.0.2";
private final static String MYSQL_REMOTE_SERVER = "123.mysql.com"; 

private Session sesion; //represents each ssh session

public void closeSSH ()
{
    sesion.disconnect();
}

public SSHConnection () throws Throwable
{

    JSch jsch = null;

        jsch = new JSch();
        jsch.setKnownHosts(S_PATH_FILE_KNOWN_HOSTS);
        //jsch.addIdentity(S_PATH_FILE_PRIVATE_KEY);

        sesion = jsch.getSession(SSH_USER, SSH_REMOTE_SERVER, SSH_REMOTE_PORT);

        sesion.setPassword(SSH_PASSWORD);

        Properties config = new Properties();
        config.put("StrictHostKeyChecking", "no");
        sesion.setConfig(config);

        sesion.connect(); //ssh connection established!

        //by security policy, you must connect through a fowarded port
        sesion.setPortForwardingL(LOCAl_PORT, MYSQL_REMOTE_SERVER, REMOTE_PORT);

}
}

3.管理ssh连接

import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.annotation.WebListener;

@WebListener
public class MyContextListener implements ServletContextListener {

    private SSHConnection conexionssh;

    public MyContextListener() {
        super();
    }

    /**
     * @see ServletContextListener#contextInitialized(ServletContextEvent)
     */
    public void contextInitialized(ServletContextEvent arg0) {
        System.out.println("Context initialized ... !");
        try {
            conexionssh = new SSHConnection();
        } catch (Throwable e) {
            e.printStackTrace(); // error connecting SSH server
        }
    }

    /**
     * @see ServletContextListener#contextDestroyed(ServletContextEvent)
     */
    public void contextDestroyed(ServletContextEvent arg0) {
        System.out.println("Context destroyed ... !");
        conexionssh.closeSSH(); // disconnect
    }

}

4.配置数据库，和你之前配置的一样，但是要修改一下连接地址

spring.datasource.url=jdbc:mysql://127.0.0.1:3307/test?characterEncoding=utf8
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

说明：

原理是，程序在本机创建ssh连接，连接到ssh server，然后再发送数据库操作指令，指令会被转发到目标数据库服务器上，返回操作结果。

注意：数据库连接地址由原来的123.mysql.com:3306改为127.0.0.1:3307,这样子，ssh连接会为每一个127.0.0.1:3307上的操作转发到123.mysql.com:3306上去，便可以正常操作数据库了。ssh连接的创建，可以采用私钥的方式，亦可以采用用户名密码的方式。

参考地址：

1.https://stackoverflow.com/questions/33526427/spring-boot-ssh-mysql

2.http://blog.weiqinxue.cn/blogs/index.php/User/articleview/ArticleID/U2A213