Java连接到远程MySQL数据库

嘿家伙我试图连接到我的远程mysql数据库，我的代码给了我这个错误：

java.lang.ClassNotFoundException: com.mysql.jdbc.Driver at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Unknown Source) at Login.login(Login.java:116) at Login.actionPerformed(Login.java:97) at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)Logging in with credintials (wqdq, dqww) at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source) at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source) at javax.swing.DefaultButtonModel.setPressed(Unknown Source) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source) at java.awt.Component.processMouseEvent(Unknown Source) at javax.swing.JComponent.processMouseEvent(Unknown Source) at java.awt.Component.processEvent(Unknown Source) at java.awt.Container.processEvent(Unknown Source) at java.awt.Component.dispatchEventImpl(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source) at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source) at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Window.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.run(Unknown Source) 

这是我的代码：

  Connection conn = null; try { String url = "jdbc:mysql://myhost:3306/mydb"; Class.forName ("com.mysql.jdbc.Driver"); conn = DriverManager.getConnection (url,"myuser","mypass"); System.out.println ("Database connection established"); } catch (Exception e) { e.printStackTrace(); } finally { if (conn != null) { try { conn.close (); System.out.println ("Database connection terminated"); } catch (Exception e) { /* ignore close errors */ } } } 

Answer 1

您需要将mysql-Downloads的 Mysql数据库的JDBC Connector J驱动程序添加到类路径中。 您可以通过转到project properties->Java Build Path -> Libraries->Add External JARs按照有关向Eclipse project properties->Java Build Path -> Libraries->Add External JARs

Answer 2

这篇文章应该回答你的问题。 http://www.vogella.de/articles/MySQLJava/article.html您可以从http://www.mysql.com/products/connector/获取所需的mysql jar文件

Answer 3

正如Dave指出的那样，首先要检查包含com.mysql.jdbc.Driver类的jar是否在您的其他库中。

如果没有，请添加它。