java - Java与MYSQL服务器的连接

Question

我知道这个问题已被讨论过很多次，但我无法在我的 Java 应用程序和 MySQL 服务器之间建立连接。

我正在使用代码形式的教程:

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class JDBCTest{
  private Connection conn = null;
  public void connect(){
    try {
      Class.forName("com.mysql.jdbc.Driver").newInstance();
      System.out.println("test");
      conn = DriverManager.getConnection("jdbc:mysql://mysql.***.***.**:3306/******","*******","top_secret_password");
      System.out.println("test2");


    } catch (SQLException ex) {
      // handle any errors
      System.out.println("SQLException: "   ex.getMessage());
      System.out.println("SQLState: "   ex.getSQLState());
      System.out.println("VendorError: "   ex.getErrorCode());
    }catch(Exception e){e.printStackTrace();}   
  }

发生的错误是:

test
SQLException: Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
SQLState: 08S01
VendorError: 0

您有解决办法吗？

Answer 1

尝试提供数据库的 IP-address 而不是它的名称。 说

conn = DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/*******","*******","top_secret_password");

并确保您的防火墙不会阻止 3306 端口