Java设置一个简单的页面第一个按钮华氏度转摄氏度 第二个按钮摄氏度转华氏度第三个按钮清除 同时使用JDBC访问数据源代码实现

以下是一个简单的Java页面，包含三个按钮：一个用于将华氏度转换为摄氏度，一个用于将摄氏度转换为华氏度，以及一个用于清除输入字段的按钮。此外，代码还包括使用JDBC访问数据源的实现。

import java.awt.*;
import java.awt.event.*;
import java.sql.*;

public class TemperatureConverter extends Frame implements ActionListener {

    // GUI components
    private TextField fahrenheitField;
    private TextField celsiusField;
    private Button toCelsiusButton;
    private Button toFahrenheitButton;
    private Button clearButton;

    // Database connection
    private Connection conn;

    public TemperatureConverter() {
        // Initialize GUI components
        fahrenheitField = new TextField(10);
        celsiusField = new TextField(10);
        toCelsiusButton = new Button("Fahrenheit to Celsius");
        toFahrenheitButton = new Button("Celsius to Fahrenheit");
        clearButton = new Button("Clear");

        // Add event listeners to buttons
        toCelsiusButton.addActionListener(this);
        toFahrenheitButton.addActionListener(this);
        clearButton.addActionListener(this);

        // Add components to frame
        setLayout(new FlowLayout());
        add(new Label("Fahrenheit:"));
        add(fahrenheitField);
        add(new Label("Celsius:"));
        add(celsiusField);
        add(toCelsiusButton);
        add(toFahrenheitButton);
        add(clearButton);

        // Initialize database connection
        try {
            Class.forName("com.mysql.jdbc.Driver");
            conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/mydatabase", "root", "password");
        } catch (Exception e) {
            e.printStackTrace();
        }

        // Set frame properties
        setTitle("Temperature Converter");
        setSize(300, 150);
        setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == toCelsiusButton) {
            // Convert Fahrenheit to Celsius
            try {
                double fahrenheit = Double.parseDouble(fahrenheitField.getText());
                double celsius = (fahrenheit - 32) * 5 / 9;
                celsiusField.setText(Double.toString(celsius));

                // Save conversion to database
                PreparedStatement stmt = conn.prepareStatement("INSERT INTO conversions (fahrenheit, celsius) VALUES (?, ?)");
                stmt.setDouble(1, fahrenheit);
                stmt.setDouble(2, celsius);
                stmt.executeUpdate();
            } catch (Exception ex) {
                ex.printStackTrace();
            }
        } else if (e.getSource() == toFahrenheitButton) {
            // Convert Celsius to Fahrenheit
            try {
                double celsius = Double.parseDouble(celsiusField.getText());
                double fahrenheit = celsius * 9 / 5 + 32;
                fahrenheitField.setText(Double.toString(fahrenheit));

                // Save conversion to database
                PreparedStatement stmt = conn.prepareStatement("INSERT INTO conversions (celsius, fahrenheit) VALUES (?, ?)");
                stmt.setDouble(1, celsius);
                stmt.setDouble(2, fahrenheit);
                stmt.executeUpdate();
            } catch (Exception ex) {
                ex.printStackTrace();
            }
        } else if (e.getSource() == clearButton) {
            // Clear input fields
            fahrenheitField.setText("");
            celsiusField.setText("");
        }
    }

    public static void main(String[] args) {
        new TemperatureConverter();
    }
}

请注意，此代码仅用于演示目的，需要根据实际情况进行修改和优化。