英文:
How to connent to Oracle database with SSH in IntelliJ IDEA
问题
以下是您要翻译的内容：
我正在尝试使用SSH配置数据源，以便从校外的IntelliJ访问数据库。配置如屏幕截图所示，我遇到了以下错误：
[08006][17002] IO错误：从读取调用中获得负一，连接持续时间30003毫秒，认证持续时间0毫秒。oracle.net.ns.NetException：从读取调用中获得负一。
实际上，我已经成功地在Java程序中使用loginProxy()和loginDB()连接到数据库。通过运行代码，我知道jdbcPort应该是动态的，我认为这也应该填写在“数据源和驱动程序”配置窗口中“常规”选项卡中的“端口”空白处。
问题来了，如果要填写的端口是动态的，我该如何进行配置？或者我是否有什么误解，实际上应该有另一种方法？
另外一个问题：String URL = "jdbc:oracle:thin:@" + jdbcHost + ":" + jdbcPort + "/" + database; 这里使用了什么URL格式？它看起来既不像SID、服务名，也不像TNS，但它却起作用了……有趣的是，当我将"/"替换为":"，与SID格式匹配时，它就不起作用了。
/**
* 登录代理。请勿更改此函数。
*
* @return boolean
*/
public boolean loginProxy() {
if (getYESorNO("是否使用SSH隧道？")) { // 如果使用SSH隧道
String[] namePwd = getUsernamePassword("登录cs实验室计算机");
String sshUser = namePwd[0];
String sshPwd = namePwd[1];
try {
proxySession = new JSch().getSession(sshUser, proxyHost, proxyPort);
proxySession.setPassword(sshPwd);
Properties config = new Properties();
config.put("StrictHostKeyChecking", "no");
proxySession.setConfig(config);
proxySession.connect();
proxySession.setPortForwardingL(forwardHost, 0, databaseHost, databasePort);
forwardPort = Integer.parseInt(proxySession.getPortForwardingL()[0].split(":")[0]);
// forwardPort在这里设置，似乎是动态的...
} catch (JSchException e) {
e.printStackTrace();
return false;
}
jdbcHost = forwardHost; // 在SSH连接情况下使用，即"localhost"
jdbcPort = forwardPort; // 在SSH连接情况下使用
} else {
jdbcHost = databaseHost;
jdbcPort = databasePort;
}
return true;
}
/**
* 登录Oracle系统。根据指示更改此函数。
*
* @return boolean
*/
public boolean loginDB() {
String username = "我的数据库用户名";
String password = "我的数据库密码";
/* 请勿更改以下代码 */
String URL = "jdbc:oracle:thin:@" + jdbcHost + ":" + jdbcPort + "/" + database;
try {
System.out.println("正在登录 " + URL + " ...");
conn = DriverManager.getConnection(URL, username, password);
return true;
} catch (SQLException e) {
e.printStackTrace();
return false;
}
}
英文:
I'm trying to configure the data source using SSH to access the Database from IntelliJ off-campus. The configuration is as shown in the screenshots, and I got
>[08006][17002] IO Error: Got minus one from a read call, connect lapse 30003 ms., Authentication lapse 0 ms. oracle.net.ns.NetException: Got minus one from a read call.
In fact, I've succeeded to connect to the DB with the loginProxy() and loginDB() in a Java program. From running the code, I knew that the jdbcPort should be dynamic, and I assume that's also what should be filled in the "Port" blank in the "General" tab in "Data Source and Drivers" configuration window.
So here comes the problem, how can I configure it if the Port to be filled in is DYNAMIC? Or did I get anything wrong so that actually there should be another approach?
An additional question: String URL = "jdbc:oracle:thin:@" + jdbcHost + ":" + jdbcPort + "/" + database; What URL format is used here? It doesn't look like SID, Service Name, or TNS, but it does work... and it's funny that when I substitute the "/" with ":", which matches the SID format, it doesn't work anymore...
/**
* Login the proxy. Do not change this function.
*
* @return boolean
*/
public boolean loginProxy() {
if (getYESorNO("Using ssh tunnel or not?")) { // if using ssh tunnel
String[] namePwd = getUsernamePassword("Login cs lab computer");
String sshUser = namePwd[0];
String sshPwd = namePwd[1];
try {
proxySession = new JSch().getSession(sshUser, proxyHost, proxyPort);
proxySession.setPassword(sshPwd);
Properties config = new Properties();
config.put("StrictHostKeyChecking", "no");
proxySession.setConfig(config);
proxySession.connect();
proxySession.setPortForwardingL(forwardHost, 0, databaseHost, databasePort);
forwardPort = Integer.parseInt(proxySession.getPortForwardingL()[0].split(":")[0]);
// 👆 forwardPort is set here, seems to be dynamic...
} catch (JSchException e) {
e.printStackTrace();
return false;
}
jdbcHost = forwardHost; // 👈 this is used in case of SSH connection, which is "localhost"
jdbcPort = forwardPort; // 👈 this is used in case of SSH connection
} else {
jdbcHost = databaseHost;
jdbcPort = databasePort;
}
return true;
}
/**
* Login the oracle system. Change this function under instruction.
*
* @return boolean
*/
public boolean loginDB() {
String username = "myDBUsername";
String password = "myDBPassword";
/* Do not change the code below */
String URL = "jdbc:oracle:thin:@" + jdbcHost + ":" + jdbcPort + "/" + database;
try {
System.out.println("Logging " + URL + " ...");
conn = DriverManager.getConnection(URL, username, password);
return true;
} catch (SQLException e) {
e.printStackTrace();
return false;
}
}
答案1
得分: 1
在常规选项卡上，您需要指定真实的数据库服务器主机名和端口，而不是localhost。在下一个选项卡上配置了SSH隧道后，所有连接方面的事情都将自动完成。
英文:
On general tab you need to specify real db server hostname and port, not localhost. With configured SSH tunnel on next tab all the things for connection will be done automatically.
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