intellij IDEA安装JDBC报错 No suitable driver found for jdbc:mysql://localhost:3306

项目场景：

本地尝试使用intellij IDEA加载JDBC连接MySQL，尝试实现增删改查，本来想做一个小Demo。

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问题描述

报错：

java.lang.ClassNotFoundException: com.mysql.cj.jdbc.Driver
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:606)
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:168)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
    at java.base/java.lang.Class.forName0(Native Method)
    at java.base/java.lang.Class.forName(Class.java:377)
    at Utils.JdbcTemplate.<init>(JdbcTemplate.java:33)
    at Utils.JdbcTemplate.getJdbcTemplate(JdbcTemplate.java:22)
    at Listener.userListener.actionPerformed(userListener.java:27)
    at java.desktop/javax.swing.JTextField.fireActionPerformed(JTextField.java:508)
    at java.desktop/javax.swing.JTextField.postActionEvent(JTextField.java:723)
    at java.desktop/javax.swing.JTextField$NotifyAction.actionPerformed(JTextField.java:839)
    at java.desktop/javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1810)
    at java.desktop/javax.swing.JComponent.processKeyBinding(JComponent.java:2900)
    at java.desktop/javax.swing.JComponent.processKeyBindings(JComponent.java:2948)
    at java.desktop/javax.swing.JComponent.processKeyEvent(JComponent.java:2862)
    at java.desktop/java.awt.Component.processEvent(Component.java:6391)
    at java.desktop/java.awt.Container.processEvent(Container.java:2263)
    at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:4990)
    at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2321)
    at java.desktop/java.awt.Component.dispatchEvent(Component.java:4822)
    at java.desktop/java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1950)
    at java.desktop/java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:870)
    at java.desktop/java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1139)
    at java.desktop/java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:1009)
    at java.desktop/java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:835)
    at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:4871)
    at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2321)
    at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2769)
    at java.desktop/java.awt.Component.dispatchEvent(Component.java:4822)
    at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:772)
    at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
    at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:715)
    at java.base/java.security.AccessController.doPrivileged(AccessController.java:391)
    at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
    at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:95)
    at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:745)
    at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:743)
    at java.base/java.security.AccessController.doPrivileged(AccessController.java:391)
    at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
    at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:742)
    at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
    at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
    at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
    at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
    at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
    at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
java.sql.SQLException: No suitable driver found for jdbc:mysql://localhost:3306/sport

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原因分析：

一开始以为是路径不对，后来发现是加载方式出了问题，没有添加项目依赖，然后就找不到Dirver的路径。

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解决方案：

1.右键项目，点击文件-->项目结构

2、点击模块

3、然后就成功连接上了

总结

就无语，我以为是什么大问题，一直在纳闷，原来是没加项目依赖，直把jar拉到了目录里，就无语操作