详情可以看https://eco.dameng.com/document/dm/zh-cn/app-dev/java-jdbc.html

package java_jdbc;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class jdbc_conn {
static Connection con = null;
static String cname = "dm.jdbc.driver.DmDriver";
static String url = "jdbc:dm://localhost:5236";
static String userid = "SYSDBA";
static String pwd = "*****";
public static void main(String[] args) {
try {
Class.forName(cname);
con = DriverManager.getConnection(url, userid, pwd);
con.setAutoCommit(true);
System.out.println("[SUCCESS]conn database");
} catch (Exception e) {
System.out.println("[FAIL]conn database：" + e.getMessage());
}
}
public void disConn(Connection con) throws SQLException {
if (con != null) {
con.close();
}
}
}

可参考上述文档，如有demo，可执行：java -jar jdbc_test.jar ip 端口号连接。

可以参考下这篇文章https://blog.csdn.net/aa0597/article/details/118091573