问题描述
谁能告诉我在这里做错了什么。 我正在尝试为我的实践创建学生数据库管理系统，但我被困在这里。在这里，我试图将 java 文件与本地服务器上的 MysqL 连接，但出现此错误。
这是代码
try {
Class.forName("com.MysqL.jdbc.Driver");
sqlConn = DriverManager.getConnection(dataConn,username,password);
String str = "insert into studentdata(StudentID,FirstName,LastName,Address,Gender,Mobile,"
+ "Math,Game,DataSci,Analysis,Graphic,DataBase1,Science,English)values"
+ "(?,?,?)";
pst = sqlConn.prepareStatement(str);
pst.setString(1,txtStudentID.getText());
pst.setString(2,txtFirstName.getText());
pst.setString(3,txtLastName.getText());
pst.setString(4,txtAddress.getText());
pst.setString(5,(String) cboGender.getSelectedItem());
pst.setString(6,txtMobile.getText());
pst.setString(7,(String) cboMaths.getSelectedItem());
pst.setString(8,(String) cboGames.getSelectedItem());
pst.setString(9,(String) cboDataSci.getSelectedItem());
pst.setString(10,(String) cboAnalysis.getSelectedItem());
pst.setString(11,(String) cboGraphic.getSelectedItem());
pst.setString(12,(String) cboDataBase.getSelectedItem());
pst.setString(13,(String) cboScience.getSelectedItem());
pst.setString(14,(String) cboEnglish.getSelectedItem());
int resu = pst.executeUpdate();
System.out.println("result: " + resu);
JOptionPane.showMessageDialog(this,"Student Record Added");
} catch (ClassNotFoundException | sqlException ex) {
java.util.logging.Logger.getLogger(StudentDBMS.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);
}
这是我的 POM 文件
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.mycompany</groupId>
<artifactId>StudentDBMS</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<repositories>
<repository>
<id>unkNown-jars-temp-repo</id>
<name>A temporary repository created by NetBeans for libraries and jars it Could not identify. Please replace the dependencies in this repository with correct ones and delete this repository.</name>
<url>file:${project.basedir}/lib</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>unkNown.binary</groupId>
<artifactId>AbsoluteLayout</artifactId>
<version>SNAPSHOT</version>
</dependency>
</dependencies>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
</project>
The POM for unkNown.binary:AbsoluteLayout:jar:SNAPSHOT is missing,no dependency information available
--- exec-maven-plugin:3.0.0:exec (default-cli) @ StudentDBMS ---
Apr 20,2021 12:36:04 AM StudentDBMS.StudentDBMS btnAddNewActionPerformed
SEVERE: null
java.lang.classNotFoundException: com.MysqL.jdbc.Driver
at java.net.urlclassloader.findClass(urlclassloader.java:382)
at java.lang.classLoader.loadClass(ClassLoader.java:418)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355)
at java.lang.classLoader.loadClass(ClassLoader.java:351)
at java.lang.class.forName0(Native Method)
at java.lang.class.forName(Class.java:264)
at StudentDBMS.StudentDBMS.btnAddNewActionPerformed(StudentDBMS.java:400)
at StudentDBMS.StudentDBMS.access$100(StudentDBMS.java:26)
at StudentDBMS.StudentDBMS$2.actionPerformed(StudentDBMS.java:130)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setpressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6539)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6304)
at java.awt.Container.processEvent(Container.java:2239)
at java.awt.Component.dispatchEventImpl(Component.java:4889)
at java.awt.Container.dispatchEventImpl(Container.java:2297)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.Lightweightdispatcher.retargetMouseEvent(Container.java:4904)
at java.awt.Lightweightdispatcher.processMouseEvent(Container.java:4535)
at java.awt.Lightweightdispatcher.dispatchEvent(Container.java:4476)
at java.awt.Container.dispatchEventImpl(Container.java:2283)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:760)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:84)
at java.awt.EventQueue$4.run(EventQueue.java:733)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:730)
at java.awt.EventdispatchThread.pumpOneEventForFilters(EventdispatchThread.java:205)
at java.awt.EventdispatchThread.pumpEventsForFilter(EventdispatchThread.java:116)
at java.awt.EventdispatchThread.pumpEventsForHierarchy(EventdispatchThread.java:105)
at java.awt.EventdispatchThread.pumpEvents(EventdispatchThread.java:101)
at java.awt.EventdispatchThread.pumpEvents(EventdispatchThread.java:93)
at java.awt.EventdispatchThread.run(EventdispatchThread.java:82)
解决方法
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