Question

我想使用Java连接到Amazon EC2服务器上的MySQL数据库。我能够使用Jsch库创建ssh隧道并将端口转发到该服务器，但是连接到DB总是以异常结束

java.io.EOFException：无法读取服务器的响应。预计读取4个字节，在连接意外丢失之前读取0个字节。

我认为我和Hei（SSH tunneling to remote access MySQL database）

的情况相同

这是我的代码：



    public static void main(final String[] args) throws SQLException {
            final int lport = 3306;
            final String host = "xxx.xxx.xxx.xxx";
             final String rhost = "xxx.xxx.xxx.xxx";
             final int rport = 3306;
            final String user = "user";
            final String dbuserName = "user";
             final String dbpassword = "password";
            final String dburl = "jdbc:mysql://localhost:" + rport  + "/information_schema?useUnicode=true&characterEncoding=UTF-8";
             final String driverName = "com.mysql.jdbc.Driver";
             Session session = null;

            try {
                //Set StrictHostKeyChecking property to no to avoid UnknownHostKey issue
                final java.util.Properties config = new java.util.Properties();
                config.put("StrictHostKeyChecking", "no");
                final JSch jsch = new JSch();
                session = jsch.getSession(user, host, 22);
                jsch.addIdentity("path\\to\\pemfile.pem");
                session.setConfig(config);
                session.connect();
                System.out.println("Connected");
                final int assinged_port = session.setPortForwardingL(lport, rhost, rport);
                System.out.println("localhost:" + assinged_port + " -> " + rhost + ":" + rport);
                System.out.println("Port Forwarded");

                //mysql database connectivity
                Class.forName(driverName).newInstance();
                dbConn = DriverManager.getConnection(dburl, dbuserName, dbpassword);

                System.out.println("Database connection established");
                System.out.println("DONE");

            } catch (final Exception e) {
                e.printStackTrace();
            } finally {
                if (dbConn != null && !dbConn.isClosed()) {
                    System.out.println("Closing Database Connection");
                    dbConn.close();
                }
                if (session != null && session.isConnected()) {
                    System.out.println("Closing SSH Connection");
                    session.disconnect();
                }
            }
        }

任何人都可以帮忙解决这个问题吗？感谢

Answer 1

我使用AppFog（在AWS前面）遇到了完全相同的问题。解决此问题的唯一方法是从我的连接字符串中删除以下内容：

"?useUnicode=true&characterEncoding=UTF-8"

当然，您应该确保这不会影响您的应用程序要求。

使用Java通过SSH连接到MySQL

1 个答案: