import java.sql.*; public class TestMysqlConnection { public static void main(String[] args) { Connection conn = null; Statement stmt = null; ResultSet rs = null; try { Class.forName("com.mysql.jdbc.Driver"); System.out.println("HERE"); conn = DriverManager.getConnection("jdbc:mysql:/...
原因:是因为 Java 连接 MySQL 没有收到任何数据包,也就是说连接失败。 解决方法:打开 Windows 服务程序,找到 mysql 进程,重启一下就可以了。
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(com.mysql.jdbc.Statement, java.lang.String, java.lang.String, com.mysql.jdbc.Buffer, int, com.mysql.jdbc.Connection, int, int, boolean, java.lang.String, boolean) (Unknown Source) at com.mysql.jdbc.Connection.execSQL(com.mysql.jdbc.Statement, jav...
而且在使用此插件时,MySQL Server 会在内存中缓存用户的认证信息,使已连接的用户的身份验证速度更快,文档描述: 这个缓存的说法就很暧昧了,当然由于文档上没有更多描述,我们只能先做假设:Java 程序通过驱动连接到 MySQL 时,如果 MySQl Server 有用户的验证缓存,则不需要额外配置 RSA 公钥即可连接成功;如果没有缓存也...
3.下载mysql驱动jar包 01.png 4.点击上图标记4,配置mysql驱动jar包。 01.png 5.点击上图标记,安装我们下载的jar包 01.png 6.有上图的标记,表示安装成功 7.在Test类主函数的代码如下 7.1 package com.chenhai.test;importjava.sql.Connection;importjava.sql.DriverManager;importjava.sql.PreparedStatement;impor...
Import of the mysql jdbc connector for optimization purposes - mysql-connector-java/src/main/java/com/mysql/jdbc/ConnectionImpl.java at master · spullara/mysql-connector-java
connect(Vertx vertx, MySQLConnectOptions connectOptions, Handler<AsyncResult<MySQLConnection>> handler) Create a connection to MySQL server with the given connectOptions. static void connect(Vertx vertx, String connectionUri) Like connect(io.vertx.rxjava.core.Vertx, io.ver...
Bug #15172 SSL Connection failure from Java to MySQL Submitted: 23 Nov 2005 4:19Modified: 13 Sep 2012 10:02 Reporter: Andre Pinkowski Email Updates: Status: Closed Impact on me: None Category: Connector / JSeverity: S1 (Critical) Version: MySQL Server 5.0.15OS: Windows (Windows XP) ...
Methods inherited from class java.lang.Object clone, finalize, getClass, notify, notifyAll, wait, wait, waitConstructor Detail MysqlConnection @Deprecated public MysqlConnection(String id, String displayName, String description, String compartmentId, Map<String,String> freeformTags, Map<Strin...
at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2308) at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2122) at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:774) at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:49) ...