javaFx 是否有任何日期和时间选择器可用?

问题描述

我是 Java 新手，我已经开始使用 javaFx 在 Java 中开发应用程序.搜索了很多，但在 javaFx 中找不到任何日期和时间选择器.即使我尝试过 JFxtras，但它不起作用.顺便说一下，我使用的是 javafx 2.2.3 和 java 7.任何帮助将不胜感激.

I am new to Java and I have started developing applications in java using javaFx. searched a lot but couldn't find any date and time picker in javaFx. Even i tried JFxtras but its not working. By the way i am using javafx 2.2.3 and java 7. Any help would be highly appreciated.

推荐答案

这是上面 DateTimePicker 控件的 Java 版本，略有改进.

Here is a Java version of the DateTimePicker control above, slightly improved.

此代码现在是 TornadoFX Controls 的一部分，您可以查看最新版本DateTimePicker.java 在 GitHub 存储库中.该控件在 Maven Central 中以及在以下坐标下可用:

This code is now part of TornadoFX Controls and you can have a look at the latest version of DateTimePicker.java in the GitHub Repo. The control is available in Maven Central as well under these coordinates:

<dependency>
    <groupId>no.tornado</groupId>
    <artifactId>tornadofx-controls</artifactId>
    <version>1.0.3</version>
</dependency>

现在的实施:

import javafx.beans.property.ObjectProperty;
import javafx.beans.property.SimpleObjectProperty;
import javafx.scene.control.DatePicker;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyEvent;
import javafx.util.StringConverter;

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;

/**
 * A DateTimePicker with configurable datetime format where both date and time can be changed
 * via the text field and the date can additionally be changed via the JavaFX default date picker.
 */
@SuppressWarnings("unused")
public class DateTimePicker extends DatePicker {
    public static final String DefaultFormat = "yyyy-MM-dd HH:mm";

    private DateTimeFormatter formatter;
    private ObjectProperty<LocalDateTime> dateTimeValue = new SimpleObjectProperty<>(LocalDateTime.now());
    private ObjectProperty<String> format = new SimpleObjectProperty<String>() {
        public void set(String newValue) {
            super.set(newValue);
            formatter = DateTimeFormatter.ofPattern(newValue);
        }
    };

    public DateTimePicker() {
        getStyleClass().add("datetime-picker");
        setFormat(DefaultFormat);
        setConverter(new InternalConverter());

        // Syncronize changes to the underlying date value back to the dateTimeValue
        valueProperty().addListener((observable, oldValue, newValue) -> {
            if (newValue == null) {
                dateTimeValue.set(null);
            } else {
                if (dateTimeValue.get() == null) {
                    dateTimeValue.set(LocalDateTime.of(newValue, LocalTime.now()));
                } else {
                    LocalTime time = dateTimeValue.get().toLocalTime();
                    dateTimeValue.set(LocalDateTime.of(newValue, time));
                }
            }
        });

        // Syncronize changes to dateTimeValue back to the underlying date value
        dateTimeValue.addListener((observable, oldValue, newValue) -> {
            setValue(newValue == null ? null : newValue.toLocalDate());
        });

        // Persist changes onblur
        getEditor().focusedProperty().addListener((observable, oldValue, newValue) -> {
            if (!newValue)
                simulateEnterPressed();
        });

    }

    private void simulateEnterPressed() {
        getEditor().fireEvent(new KeyEvent(getEditor(), getEditor(), KeyEvent.KEY_PRESSED, null, null, KeyCode.ENTER, false, false, false, false));
    }

    public LocalDateTime getDateTimeValue() {
        return dateTimeValue.get();
    }

    public void setDateTimeValue(LocalDateTime dateTimeValue) {
        this.dateTimeValue.set(dateTimeValue);
    }

    public ObjectProperty<LocalDateTime> dateTimeValueProperty() {
        return dateTimeValue;
    }

    public String getFormat() {
        return format.get();
    }

    public ObjectProperty<String> formatProperty() {
        return format;
    }

    public void setFormat(String format) {
        this.format.set(format);
    }

    class InternalConverter extends StringConverter<LocalDate> {
        public String toString(LocalDate object) {
            LocalDateTime value = getDateTimeValue();
            return (value != null) ? value.format(formatter) : "";
        }

        public LocalDate fromString(String value) {
            if (value == null) {
                dateTimeValue.set(null);
                return null;
            }

            dateTimeValue.set(LocalDateTime.parse(value, formatter));
            return dateTimeValue.get().toLocalDate();
        }
    }
}

dateTimeValue 属性包含时间值，valueProperty 只包含日期值.

The dateTimeValue property contains the value with time, and the valueProperty contains only the date value.

我尚未为此组件添加测试，因此实现可能会发生变化，请查看 GitHub 以获取最新版本.

I have not added tests for this component yet, so the implementation might change, check GitHub for the latest version.

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