java.net.ConnectException [英] java.net.ConnectException

查看：55 发布时间：2021/6/5 19:34:03 java mysql

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问题描述

关于这个主题的帖子很少，但我仍然无法弄清楚出了什么问题.代码如下:

I've seen few threads about this topic but I still can't figure out what's wrong. Following is the code:

import java.sql.*;

public class SQL
{
    public static void main(String[] args) 
    {
        Connection conn = null;
        String url = "jdbc:mysql://mysql1.oyo.co.il:3306/";
        String dbName = "sdarot2_winner";
        String driver = "com.mysql.jdbc.Driver";
        String userName = ""; 
        String password = "";
        String table = "LEADER_CAM_PRODUCTS";

        try {
            Class.forName(driver).newInstance();
            conn = DriverManager.getConnection(url+dbName,userName,password);
            System.out.println("Connected to the database");
            conn.close();
            System.out.println("Disconnected from database");

        }catch (Exception e) {
            System.out.println(e);
        }
  }
}

这是我得到的错误:

com.mysql.jdbc.CommunicationsException:由于底层 >> 异常导致通信链接失败:

com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying > > exception:

** 开始嵌套异常**

** BEGIN NESTED EXCEPTION **

java.net.ConnectException消息:连接超时:连接

java.net.ConnectException MESSAGE: Connection timed out: connect

堆栈跟踪:

java.net.ConnectException:连接超时:连接在 java.net.PlainSocketImpl.socketConnect(Native Method)在 java.net.PlainSocketImpl.doConnect(来源不明)在 java.net.PlainSocketImpl.connectToAddress(Unknown Source)在 java.net.PlainSocketImpl.connect(Unknown Source)在 java.net.SocksSocketImpl.connect(来源不明)在 java.net.Socket.connect(来源不明)在 java.net.Socket.connect(来源不明)在 java.net.Socket.(来源不明)在 java.net.Socket.(来源不明)在 com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:256)在 com.mysql.jdbc.MysqlIO.(MysqlIO.java:271)在 com.mysql.jdbc.Connection.createNewIO(Connection.java:2744)在 com.mysql.jdbc.Connection.(Connection.java:1553)在 com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:285)在 java.sql.DriverManager.getConnection(Unknown Source)在 java.sql.DriverManager.getConnection(Unknown Source)在 SQL.main(SQL.java:17)

java.net.ConnectException: Connection timed out: connect at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.PlainSocketImpl.doConnect(Unknown Source) at java.net.PlainSocketImpl.connectToAddress(Unknown Source) at java.net.PlainSocketImpl.connect(Unknown Source) at java.net.SocksSocketImpl.connect(Unknown Source) at java.net.Socket.connect(Unknown Source) at java.net.Socket.connect(Unknown Source) at java.net.Socket.(Unknown Source) at java.net.Socket.(Unknown Source) at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:256) at com.mysql.jdbc.MysqlIO.(MysqlIO.java:271) at com.mysql.jdbc.Connection.createNewIO(Connection.java:2744) at com.mysql.jdbc.Connection.(Connection.java:1553) at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:285) at java.sql.DriverManager.getConnection(Unknown Source) at java.sql.DriverManager.getConnection(Unknown Source) at SQL.main(SQL.java:17)

** 结束嵌套异常 **

** END NESTED EXCEPTION **

最后一个发送到服务器的数据包是 1 毫秒前.

Last packet sent to the server was 1 ms ago.

以下是我发现的一些东西:

Here is few things I found around:

IP/域或端口不正确
IP/域或端口(即服务)已关闭
IP/域的响应时间比您的默认超时要长
您的防火墙阻止了您使用的任何端口上的请求或响应
您的防火墙阻止了对该特定主机的请求
您的互联网访问已关闭

a) 这是正确的.b)它没有关闭，因为我的网站现在正在使用该数据库.c) 我该如何检查?我不认为这是问题所在，因为正如我所说，我在这个数据库上有一个正在运行的网站.d)现在的方式，因为我上面提到的原因相同.e) 与 d 相同

a) it is correct. b) it's not down since I got a website that is working right now with that database. c) how can I check that?I don't think that it's the problem since as I said I got a running website on this database. d) now way because the same reason I mentioned above. e) samem as d

那么我做错了什么?为什么 php 代码可以与 sql 一起使用，而 java 却给我错误?谢谢.

So what I'm doing wrong?how come a php code can work with sql but java gives me errors? Thank you.

java.net.ConnectException [英] java.net.ConnectException

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