如何将Vaadin DateField绑定到LocalDateTime

本文介绍了如何将Vaadin DateField绑定到LocalDateTime的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

Vaadin docs 显示了如何使用DateField与java.util.Date，但我想将DateField与BeanFieldGroup绑定到Java 8类型java.time.LocalDateTime的bean属性.我该如何实现?

The Vaadin docs show how to use the DateField with java.util.Date but I want to bind the DateField with a BeanFieldGroup to a bean property of Java 8 type java.time.LocalDateTime. How can I achieve that?

推荐答案

似乎像 Vaadin Converter 是必经之路:

package org.raubvogel.fooddiary.util; import java.time.LocalDateTime; import java.time.ZoneOffset; import java.util.Date; import java.util.Locale; import com.vaadin.data.util.converter.Converter; /** * Provides a conversion between old {@link Date} and new {@link LocalDateTime} API. */ public class LocalDateTimeToDateConverter implements Converter<Date, LocalDateTime> { private static final long serialVersionUID = 1L; @Override public LocalDateTime convertToModel(Date value, Class<? extends LocalDateTime> targetType, Locale locale) throws com.vaadin.data.util.converter.Converter.ConversionException { if (value != null) { return value.toInstant().atZone(ZoneOffset.systemDefault()).toLocalDateTime(); } return null; } @Override public Date convertToPresentation(LocalDateTime value, Class<? extends Date> targetType, Locale locale) throws com.vaadin.data.util.converter.Converter.ConversionException { if (value != null) { return Date.from(value.atZone(ZoneOffset.systemDefault()).toInstant()); } return null; } @Override public Class<LocalDateTime> getModelType() { return LocalDateTime.class; } @Override public Class<Date> getPresentationType() { return Date.class; } }

灵感来自此链接，它将在LocalDate和Date之间转换.需要通过setConverter或通过转换器工厂.

Inspired by this link which converts between LocalDate and Date. The converter needs to be set to the DateField via setConverter or alternatively via a converter factory.