javafx与mysql的连接

建立一个private类型的DatabassCnonection函数实现与数据库的连接，在start方法中进行调用，即可完成数据库的连接。注：进行数据库连接时记得修改自己root密码，和数据库名称，以及表名。

private void DatabassConnection()  {
        try{ Class.forName("com.mysql.cj.jdbc.Driver");
            String s="insert into student values(?,?,?,?)";
            Connection conn=DriverManager.getConnection("jdbc:mysql://localhost:3306/study?useSSL=false&characterEncoding=utf8&serverTimezone=UTC&allowPublicKeyRetrieval=true","root","123456");
            state=conn.prepareStatement(s);
            String s2="select *from student where name=? and course=?";
            state2=conn.prepareStatement(s2);

        }
        catch(ClassNotFoundException | SQLException e){
            System.out.println(e.getMessage());}
    }

javafx静态页面的设计

 //按钮
    Button bt_insert = new Button("录入");
    Button bt_select = new Button("查找");
    //边界面板
    BorderPane bd_pane = new BorderPane();
    //各标签的文本框
    TextArea center_text=new TextArea();
    Label lb_id = new Label("学号");
    Label lb_name = new Label("姓名");
    Label lb_name2 = new Label("姓名");
    Label lb_course = new Label("课程名");
    Label lb_course2 = new Label("课程名");
    Label lb_grade = new Label("成绩");



    @Override
    public void start(Stage stage) throws Exception,SQLException {
        DatabassConnection();
        //建立静态页面
        BorderPane bdpane = new BorderPane();
        HBox myHbox1 = new HBox();
        myHbox1.setSpacing(5);
        myHbox1.setAlignment(Pos.CENTER);
        Insets insets=new Insets(10,10,10,10);
        Insets insets2=new Insets(1,1,1,1);
        
        VBox myvbox1 = new VBox();

        myvbox1.setAlignment(Pos.CENTER_LEFT);
        //myHbox.setFillHeight(true);
        //学号
        TextArea text_id = new TextArea();
        text_id.setPrefRowCount(1);
        text_id.setPrefColumnCount(10);
        //姓名
        TextArea text_name=new TextArea();
        text_name.setPrefRowCount(1);
        text_name.setPrefColumnCount(10);
        //课程名
        TextArea text_course=new TextArea();
        text_course.setPrefRowCount(1);
        text_course.setPrefColumnCount(10);
        //成绩
        TextArea text_grade=new TextArea();
        text_grade.setPrefRowCount(1);
        text_grade.setPrefColumnCount(10);
        //额外的text
        TextArea text_name2=new TextArea();
        text_name2.setPrefRowCount(1);
        text_name2.setPrefColumnCount(5);
        TextArea text_course2=new TextArea();
        text_course2.setPrefRowCount(1);
        text_course2.setPrefColumnCount(5);

        //top
        myHbox1.setMargin(bt_insert,insets);
        myHbox1.setMargin(lb_id,insets);

        myHbox1.setMargin(text_id,insets);
        myHbox1.setMargin(lb_course,insets);
        myHbox1.setMargin(text_course,insets);
        myHbox1.setMargin(lb_name,insets);
        myHbox1.setMargin(text_name,insets);
        myHbox1.setMargin(lb_grade,insets);
        myHbox1.setMargin(text_grade,insets);

        ObservableList list1 = myHbox1.getChildren();
        list1.addAll(bt_insert,lb_id,text_id,lb_name,text_name,lb_course,text_course,lb_grade,text_grade);

        //左边界
        myvbox1.setMargin(bt_select,insets2);
        myvbox1.setMargin(lb_name2,insets2);
        myvbox1.setMargin(text_name2,insets2);
        myvbox1.setMargin(lb_course2,insets2);
        myvbox1.setMargin(text_course2,insets2);
        ObservableList list2 = myvbox1.getChildren();

        list2.addAll(bt_select,lb_name2,text_name2,lb_course2,text_course2);
          //中间文本显示框

        bdpane.setTop(myHbox1);
        bdpane.setLeft(myvbox1);
        bdpane.setCenter(center_text);
        Scene scene = new Scene(bdpane);
        stage.setScene(scene);
        stage.show();

    }

录入和查询按钮的响应事件

bt_select.setOnMouseClicked(new EventHandler<MouseEvent>() {
            @Override
            public void handle(MouseEvent mouseEvent) {
                String name2=text_name2.getText();
                String course2=text_course2.getText();
                try {
                    state2.setString(1,name2);
                    state2.setString(2,course2);
                    rs =  state2.executeQuery();
                    center_text.setText("id name course grade"+"\n");
                    while (rs.next()){

                        center_text.appendText(rs.getString("id")+" ");
                        center_text.appendText(rs.getString("name")+" ");
                        center_text.appendText(rs.getString("course")+" ");
                        center_text.appendText(rs.getInt("grade")+"\n");
                        System.out.print(rs.getString("id")+" ");
                        System.out.print(rs.getString("name")+" ");
                        System.out.print(rs.getString("course")+" ");
                        System.out.println(rs.getInt("grade")+" ");
                    }

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

完整代码

注：记得修改自己的root密码和数据库名以及表名

package com.example.fxdemo;

import javafx.application.Application;
import javafx.collections.ObservableList;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextArea;
import javafx.scene.image.Image;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.*;
import javafx.scene.paint.ImagePattern;
import javafx.stage.Stage;

import java.sql.*;
//https://www.cnblogs.com/jffx/p/9911968.html

//1、编写一个能够进行异常处理的分数管理小系统。
public class synthesize extends Application {
    //private  Connection con=null;
    private ResultSet rs;
    private PreparedStatement state;
    private PreparedStatement state2;
    private void DatabassConnection()  {
        try{ Class.forName("com.mysql.cj.jdbc.Driver");
            String s="insert into student values(?,?,?,?)";
            Connection conn=DriverManager.getConnection("jdbc:mysql://localhost:3306/study?useSSL=false&characterEncoding=utf8&serverTimezone=UTC&allowPublicKeyRetrieval=true","root","123456");
            state=conn.prepareStatement(s);
            String s2="select *from student where name=? and course=?";
            state2=conn.prepareStatement(s2);

        }
        catch(ClassNotFoundException | SQLException e){
            System.out.println(e.getMessage());}
    }

    //按钮
    Button bt_insert = new Button("录入");
    Button bt_select = new Button("查找");
    //边界面板
    BorderPane bd_pane = new BorderPane();
    //各标签的文本框
    TextArea center_text=new TextArea();
    Label lb_id = new Label("学号");
    Label lb_name = new Label("姓名");
    Label lb_name2 = new Label("姓名");
    Label lb_course = new Label("课程名");
    Label lb_course2 = new Label("课程名");
    Label lb_grade = new Label("成绩");



    @Override
    public void start(Stage stage) throws Exception,SQLException {
        DatabassConnection();
        //建立静态页面
        BorderPane bdpane = new BorderPane();
        HBox myHbox1 = new HBox();
        myHbox1.setSpacing(5);
        myHbox1.setAlignment(Pos.CENTER);
        Insets insets=new Insets(10,10,10,10);
        Insets insets2=new Insets(1,1,1,1);
        
        VBox myvbox1 = new VBox();

        myvbox1.setAlignment(Pos.CENTER_LEFT);
        //myHbox.setFillHeight(true);
        //学号
        TextArea text_id = new TextArea();
        text_id.setPrefRowCount(1);
        text_id.setPrefColumnCount(10);
        //姓名
        TextArea text_name=new TextArea();
        text_name.setPrefRowCount(1);
        text_name.setPrefColumnCount(10);
        //课程名
        TextArea text_course=new TextArea();
        text_course.setPrefRowCount(1);
        text_course.setPrefColumnCount(10);
        //成绩
        TextArea text_grade=new TextArea();
        text_grade.setPrefRowCount(1);
        text_grade.setPrefColumnCount(10);
        //额外的text
        TextArea text_name2=new TextArea();
        text_name2.setPrefRowCount(1);
        text_name2.setPrefColumnCount(5);
        TextArea text_course2=new TextArea();
        text_course2.setPrefRowCount(1);
        text_course2.setPrefColumnCount(5);

        //top
        myHbox1.setMargin(bt_insert,insets);
        myHbox1.setMargin(lb_id,insets);

        myHbox1.setMargin(text_id,insets);
        myHbox1.setMargin(lb_course,insets);
        myHbox1.setMargin(text_course,insets);
        myHbox1.setMargin(lb_name,insets);
        myHbox1.setMargin(text_name,insets);
        myHbox1.setMargin(lb_grade,insets);
        myHbox1.setMargin(text_grade,insets);

        ObservableList list1 = myHbox1.getChildren();
        list1.addAll(bt_insert,lb_id,text_id,lb_name,text_name,lb_course,text_course,lb_grade,text_grade);

        //左边界
        myvbox1.setMargin(bt_select,insets2);
        myvbox1.setMargin(lb_name2,insets2);
        myvbox1.setMargin(text_name2,insets2);
        myvbox1.setMargin(lb_course2,insets2);
        myvbox1.setMargin(text_course2,insets2);
        ObservableList list2 = myvbox1.getChildren();

        list2.addAll(bt_select,lb_name2,text_name2,lb_course2,text_course2);

        //响应事件,录入信息
         bt_insert.setOnMouseClicked(new EventHandler<MouseEvent>() {
            @Override
            public void handle(MouseEvent mouseEvent) {
                String id=text_id.getText();
                String name=text_name.getText();
                String course=text_course.getText();
                String grade=text_grade.getText();
                int grade1=Integer.parseInt(grade);
                try {
                    state.setString(1,id);
                    state.setString(2,name);
                    state.setString(3,course);
                    state.setInt(4,grade1);
                    state.executeUpdate();
                    center_text.setText("录入成功！");
                } catch (SQLException e) {
                    e.printStackTrace();
                }

            }
        });
         //响应事件，查询信息
        bt_select.setOnMouseClicked(new EventHandler<MouseEvent>() {
            @Override
            public void handle(MouseEvent mouseEvent) {
                String name2=text_name2.getText();
                String course2=text_course2.getText();
                try {
                    state2.setString(1,name2);
                    state2.setString(2,course2);
                    rs =  state2.executeQuery();
                    center_text.setText("id name course grade"+"\n");
                    while (rs.next()){

                        center_text.appendText(rs.getString("id")+" ");
                        center_text.appendText(rs.getString("name")+" ");
                        center_text.appendText(rs.getString("course")+" ");
                        center_text.appendText(rs.getInt("grade")+"\n");
                        System.out.print(rs.getString("id")+" ");
                        System.out.print(rs.getString("name")+" ");
                        System.out.print(rs.getString("course")+" ");
                        System.out.println(rs.getInt("grade")+" ");
                    }

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

        //中间文本显示框

        bdpane.setTop(myHbox1);
        bdpane.setLeft(myvbox1);
        bdpane.setCenter(center_text);
        Scene scene = new Scene(bdpane);
        stage.setScene(scene);
        stage.show();

    }


    public static void main(String args[]) throws SQLException, ClassNotFoundException {
        launch(args);

}}