Grails时间类型自动转换的格式设置(in/out)

最新推荐文章于 2025-08-16 11:53:36 发布

最新推荐文章于 2025-08-16 11:53:36 发布 · 273 阅读

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#Grails #Groovy #json #Spring #Bean

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本文介绍如何在Grails应用中实现日期的JSON序列化及反序列化。通过自定义Date转换器，支持多种日期格式的输入输出，确保前后端数据交互的一致性和准确性。

1.Domain转换为json简单,直接在BootStrap的init里面添加:

JSON.registerObjectMarshaller(Date) {
    return it?.format("yyyy-MM-dd HH:mm:ss")
}

ps:还有一种方法是利用插件,重写Date的toString方法.

参见:http://stackoverflow.com/questions/690370/how-to-return-specific-date-format-as-json-in-grails

2.js段提交数据到controller,自动转换为DATE.

1)在src/groovy添加:

package utils

import java.beans.PropertyEditorSupport;
import java.text.ParseException;
import java.text.SimpleDateFormat;

/**
 * 自定义的Date转换器,支持多种format
 */
class CustomDateBinder extends PropertyEditorSupport {
	private final List<String> formats;
	
	public CustomDateBinder(List formats) {
		List<String> formatList = new ArrayList<String>(formats.size());
		for (Object format : formats) {
			formatList.add(format.toString()); // Force String values (eg. for GStrings)
		}
		this.formats = Collections.unmodifiableList(formatList);
	}

	@Override
	public void setAsText(String s) throws IllegalArgumentException {
		if (s != null)
			for (String format : formats) {
				// Need to create the SimpleDateFormat every time, since it's not thead-safe
				SimpleDateFormat df = new SimpleDateFormat(format);
				try {
					setValue(df.parse(s));
					return;
				} catch (ParseException e) {
					// Ignore
				}
			}
	}
}

2)添加CustomPropertyEditorRegistrar:

package utils

import grails.util.GrailsConfig;

import java.text.SimpleDateFormat;

import org.springframework.beans.PropertyEditorRegistrar;
import org.springframework.beans.PropertyEditorRegistry;

/**
 * 注册自定义的属性装配器
 * @author TZ
 *
 */
class CustomPropertyEditorRegistrar implements PropertyEditorRegistrar {

	@Override
	public void registerCustomEditors(PropertyEditorRegistry registry) { 
		def formats = GrailsConfig.get("grails.date.formats", List.class)?:["yyyy-MM-dd HH:mm:ss","yyyy-MM-dd'T'HH:mm:ss","yyyy-MM-dd"];
		registry.registerCustomEditor(Date.class, new CustomDateBinder(formats)); 
	} 
}

3)在conf/spring/resources.groovy中注册:

beans = {
	bean {
		//自定义属性绑定
		customPropertyEditorRegistrar(utils.CustomPropertyEditorRegistrar)
	  }
}

4)conf/Config.groovy中添加配置:

grails.date.formats = ["yyyy-MM-dd HH:mm:ss","yyyy-MM-dd'T'HH:mm:ss","yyyy-MM-dd","yyyy-MM-dd HH:mm:ss.SSS ZZZZ", "dd.MM.yyyy HH:mm:ss"];