如何在Grails中将特定日期格式返回为JSON? [英] How to return specific date format as JSON in Grails?
问题描述
render Book.list()as JSON
渲染结果是
<$ p $
{id:1,
class:Book,
author:Stephen King,
releaseDate:'2007-04-06T00:00:00',
title:The Shining}
]
您可以通过在Config.groovy中进行设置来控制输出日期。
grails.converters.json.date ='javascript'//默认或Javascript
然后结果会是原生javascript日期
[
{id:1,
class:Book ,
author:Stephen King,
easeDate:new Date(1194127343161),
title:The Shining}
]
如果我想获得如下特定的日期格式:
releaseDate:06-04-2007
<我h ave使用'collect',这需要大量的输入:
return Book.list()。collect(){$
class:it.class,
author:it.author,
releaseDate:new java.text.SimpleDateFormat(dd- MM-yyyy).format(it.releaseDate),
title:it.title
]
} as JSON
有没有更简单的方法来做到这一点?
简单的解决方案:自从Grails 1.1以来,转换器已被重写为更加模块化。不幸的是,我没有完成那个文件。它现在允许注册所谓的ObjectMarshallers(简单Pogo / Pojo实现 org.codehaus.groovy.grails.web.converters.marshaller.ObjectMarshaller
接口)。
为了达到你想要的输出,你可以在BootStrap.groovy中注册这样一个ObjectMarshaller:
import grails.converters.JSON;
class BootStrap {
def init = {servletContext - >
JSON.registerObjectMarshaller(Date){
return it?.format(dd-MM-yyyy)
}
}
def destroy = {
}
}
还有其他几种方法可以自定义转换器和I尽我所能赶上文件尽快。
In Grails, you can use the JSON converters to do this in the controller:
render Book.list() as JSON
The render result is
[
{"id":1,
"class":"Book",
"author":"Stephen King",
"releaseDate":'2007-04-06T00:00:00',
"title":"The Shining"}
]
You can control the output date by make a setting in Config.groovy
grails.converters.json.date = 'javascript' // default or Javascript
Then the result will be a native javascript date
[
{"id":1,
"class":"Book",
"author":"Stephen King",
"releaseDate":new Date(1194127343161),
"title":"The Shining"}
]
If I want to get a specific date format like this:
"releaseDate":"06-04-2007"
I have to use 'collect', which requires a lot of typing:
return Book.list().collect(){
[
id:it.id,
class:it.class,
author:it.author,
releaseDate:new java.text.SimpleDateFormat("dd-MM-yyyy").format(it.releaseDate),
title:it.title
]
} as JSON
Is there a simpler way to do this?
There is a simple solution: Since Grails 1.1 the Converters have been rewritten to be more modular. Unfortunately I didn't finish the documentation for that. It allows now to register so called ObjectMarshallers (simple Pogo/Pojo's that implement the org.codehaus.groovy.grails.web.converters.marshaller.ObjectMarshaller
interface).
To achieve your desired output, you could register such an ObjectMarshaller in BootStrap.groovy that way:
import grails.converters.JSON;
class BootStrap {
def init = { servletContext ->
JSON.registerObjectMarshaller(Date) {
return it?.format("dd-MM-yyyy")
}
}
def destroy = {
}
}
There are several other ways to customize the output of the Converters and I'll do my best do catch up with the documentation asap.
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