java - 尽管将SQL数据库链接到我的JavaFx程序但仍尝试登录却抛出错误

Question

这是我正在修改的代码
https://github.com/0xTanvir/uiuStudentRecordSystem

我已经按照自述文件中的说明将SQL数据库链接到JavaFx程序，但是我无法超越“登录屏幕”。当我按登录按钮时，将显示此错误。该怎么办？

>

"C:\Program Files\Java\jdk1.8.0_181\bin\java.exe" "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2018.2.2\lib\idea_rt.jar=52572:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2018.2.2\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_181\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\rt.jar;C:\Users\raju naik\IdeaProjects\InfiniteAir\out\production\InfiniteAir;C:\mysql-connector-java-5.1.39-bin.jar;C:\TrayNotification (1).jar" recordSystemMain.MainLogin
Exception in thread "JavaFX Application Thread" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
    at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1774)
    at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader.java:1657)
    at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
    at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
    at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
    at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
    at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
    at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:49)
    at javafx.event.Event.fireEvent(Event.java:198)
    at javafx.scene.Node.fireEvent(Node.java:8411)
    at javafx.scene.control.Button.fire(Button.java:185)
    at com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(ButtonBehavior.java:182)
    at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:96)
    at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:89)
    at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:218)
    at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
    at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
    at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
    at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
    at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
    at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
    at javafx.event.Event.fireEvent(Event.java:198)
    at javafx.scene.Scene$MouseHandler.process(Scene.java:3757)
    at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3485)
    at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1762)
    at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2494)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:394)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:295)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$353(GlassViewEventHandler.java:432)
    at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:389)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:431)
    at com.sun.glass.ui.View.handleMouseEvent(View.java:555)
    at com.sun.glass.ui.View.notifyMouse(View.java:937)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$null$147(WinApplication.java:177)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:71)
    at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:275)
    at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1769)
    ... 48 more
Caused by: java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:963)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3966)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3902)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:875)
    at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1712)
    at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1228)
    at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2253)
    at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2284)
    at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2083)
    at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:806)
    at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:404)
    at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:410)
    at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:328)
    at java.sql.DriverManager.getConnection(DriverManager.java:664)
    at java.sql.DriverManager.getConnection(DriverManager.java:247)
    at database.DBConnection.getConnection(DBConnection.java:29)
    at recordSystemMain.MainLoginController.isValidCredentials(MainLoginController.java:122)
    at recordSystemMain.MainLoginController.loginButtonClick(MainLoginController.java:73)
    ... 58 more

主要的错误点似乎是这些

1


  线程“ JavaFX应用程序线程”中的异常java.lang.RuntimeException：java.lang.reflect.InvocationTargetException


2


  引起原因：java.lang.reflect.InvocationTargetException


和这个


  由以下原因引起：java.sql.SQLException：用户'root'@'localhost'的访问被拒绝（使用密码：是）


这是检查凭据的代码，执行检查的功能在底部：

package recordSystemMain;


import database.DBConnection;
import javafx.event.Event;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.Node;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.ChoiceBox;
import javafx.scene.control.PasswordField;
import javafx.scene.control.TextField;
import javafx.stage.Stage;
import javafx.util.Duration;
import student.Student;
import teacher.TeacherController;
import tray.notification.NotificationType;
import tray.notification.TrayNotification;

import java.io.IOException;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

/**
 * Created by Tanvir on 7/22/2016.
 */


public class MainLoginController {

    @FXML
    private TextField tfEmailID;
    @FXML
    private PasswordField pfPassword;
    @FXML
    private ChoiceBox cbUser;

    @FXML
    private void loginButtonClick(Event event) throws SQLException{
        if(isAllFieldFillup()){
            String userName = tfEmailID.getText().trim();
            String password = pfPassword.getText();
            String userType = cbUser.getValue().toString().trim();


            boolean trues = true;

            switch (userType){
                case "Admin":
                    if (isValidCredentials(userType,userName,password,"Email")){
                        try {
                            Parent adminParent = FXMLLoader.load(getClass().getResource("/admin/Admin.fxml"));
                            Scene adminScene = new Scene(adminParent);
                            Stage adminStage = (Stage) ((Node) event.getSource()).getScene().getWindow();
                            adminStage.hide();
                            adminStage.setScene(adminScene);
                            adminStage.setTitle("Admin Panel");
                            adminStage.show();

                        } catch (IOException e) {
                            e.printStackTrace();
                        }

                    }
                    break;
                case "Guardian":
                    System.out.println("I am now on Guardian");
                    break;
                case "Student":
                    if(isValidCredentials(userType,userName,password,"ID")){
                        try {
                            Student student = new Student();
                            student.setStudentId(userName);
                            Parent studentParent = FXMLLoader.load(getClass().getResource("/student/Student.fxml"));
                            Scene studentScene = new Scene(studentParent);
                            Stage studentStage = (Stage) ((Node) event.getSource()).getScene().getWindow();
                            studentStage.hide();
                            studentStage.setScene(studentScene);
                            studentStage.setTitle("Student Panel");
                            studentStage.show();

                        }
                        catch (IOException e){
                            e.printStackTrace();
                        }
                    }
                    break;
                case "Teacher":
                    if (isValidCredentials(userType,userName,password,"Email")){
                        try {
                            TeacherController teacherController = new TeacherController();
                            teacherController.setEmail(userName);
                            Parent teacherParent = FXMLLoader.load(getClass().getResource("/teacher/Teacher.fxml"));
                            Scene teacherScene = new Scene(teacherParent);
                            Stage teacherStage = (Stage) ((Node) event.getSource()).getScene().getWindow();
                            teacherStage.hide();
                            teacherStage.setScene(teacherScene);
                            teacherStage.setTitle("Teacher Panel");
                            teacherStage.show();

                        } catch (IOException e) {
                            e.printStackTrace();
                        }

                    }
                    break;

            }

        }

    }


    private boolean isValidCredentials(String userType, String userName, String password,String loginType) throws SQLException {
        boolean userPassOk = false;

        DBConnection database = new DBConnection();
        Connection connection = database.getConnection();
        Statement statement = connection.createStatement();
        ResultSet resultSet = statement.executeQuery("select * from "+userType.toLowerCase()+" where db"+userType
                +loginType+" = '"+userName+"' and db"+userType+"Password = '"+password+"';");


        while (resultSet.next()){

            if(resultSet.getString("db"+userType+loginType)!=null && resultSet.getString("db"+userType+"Password")!=null){
                userPassOk = true;
            }

        }

        if(!userPassOk) {

            NotificationType notificationType = NotificationType.ERROR;
            TrayNotification tray = new TrayNotification();
            tray.setTitle("Wrong Information");
            tray.setMessage("Incorrect email or password");
            tray.setNotificationType(notificationType);
            tray.showAndDismiss(Duration.millis(3000));

            tfEmailID.clear();
            pfPassword.clear();

            userPassOk = false;

        }


        return userPassOk;
    }



    private boolean isAllFieldFillup(){
        boolean fillup;
        if(tfEmailID.getText().trim().isEmpty()||pfPassword.getText().isEmpty()){

            NotificationType notificationType = NotificationType.INFORMATION;
            TrayNotification tray = new TrayNotification();
            tray.setTitle("Attention!!!");
            tray.setMessage("Email or Password should not Empty.");
            tray.setNotificationType(notificationType);
            tray.showAndDismiss(Duration.millis(3000));

            fillup = false;
        }
        else fillup = true;
        return fillup;
    }
}

Answer 1

此错误可能是由于使用了错误的密码或MySQL强制建立了到数据库的安全连接，您可以通过在MySQL命令promt中执行以下几行来检查SSL要求：

MariaDB [(none)]> CONNECT mysql;
MariaDB [mysql]>  SELECT ssl_type FROM user WHERE User ="root"

如果要禁用SSL，则可以运行以下命令：

MariaDB [(none)]> CONNECT mysql;
MariaDB [mysql]>  UPDATE user SET ssl_type="" WHERE User ="root"

如果要保留SSL要求，建议您结帐 the MySQL SSL documentation