java中 MySQL与驱动jdbc连接不上，想请教高手：jdbc驱动：mysql-connector-java-5.1.18-bin.jar怎么用啊？

Posted 2023-03-18

连接数据库的一段代码如下：（高手们你们看看有问题么？？）
Driver driver = new com.mysql.jdbc.Driver();
DriverManager.registerDriver(driver);
String url = "jdbc:mysql://localhost:3306/bookstore";
String user = "root";
String password = "123";
int i=0;
Class.forName("com.MySQL.jdbc.Driver").newInstance();
Connection conn = DriverManager.getConnection(url, user, password);
if(!conn.isClosed())
System.out.println("连接数据库成功！");
statement= conn.createStatement();


报错如下：（总是说没有连接jdbc驱动，大神们！！用mysql时，jdbc应该怎么放或者配置啊？？？求教啊！！！）
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 connectmsl.Test.<init>(Test.java:27)
at connectmsl.Admin.actionPerformed(Admin.java:59)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
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)

Class.forName("com.MySQL.jdbc.Driver").newInstance();
改成 com.mysql.jdbc.Driver 参考技术A MYSQL改小写是必须的。不过你还要把这个jar包放到你项目的lib文件夹里面去，这样他才能找到撒。 参考技术B 那个mysql-connector-java-5.0.8-bin.jar你加上试试！ 参考技术C 楼上正解，还有就是要中入mySql数据库的jar驱动包