Spring 3.1 JSON日期格式 [英] Spring 3.1 JSON date format

问题描述

我正在使用带注释的Spring 3.1 MVC代码（spring-mvc），当我通过@RequestBody发送日期对象时，日期显示为数字。
这是我的控制器

I am using annotated Spring 3.1 MVC code (spring-mvc) and when i send date object through the @RequestBody the date is showing up as numeric. This is my controller

@Controller
@RequestMapping("/test")
public class MyController {

    @InitBinder
    public void initBinder(WebDataBinder binder) {
        binder.registerCustomEditor(Date.class,
                  new CustomDateEditor(new SimpleDateFormat("yyyy-MM-dd"),true));
    }


    @RequestMapping(value = "/getdate", method = RequestMethod.GET)
    public @ResponseBody Date getDate(@RequestParam("dt") Date dt, Model model) {
        // dt is properly constructed here..
        return new Date();
    }
}

当我通过约会时，我能够收到格式中的日期。
但我的浏览器显示日期为数字

When i pass in date, i am able to receive the date in the format. But my browser displays date as numeric

1327682374011

如何以我为webbinder注册的格式显示日期？
我在一些论坛上看到我应该使用jackson mapper，但我不能改变现有的mapper？

How do i make it display date in the format I have registered for the webbinder? I saw in some forum that I should use jackson mapper, but cant i alter the existing mapper?

推荐答案

In要覆盖Jakson的默认日期格式策略，请遵循以下步骤：

In order to override the default date formatting strategy of Jakson following are the step to follow:

1. 扩展 JsonSerializer 创建一个用于处理日期格式的新类


2. 覆盖序列化（日期，JsonGenerator gen，SerializerProvider提供者）功能以您想要的格式格式化日期并将其写回生成器实例（gen）


3. 使用 @JsonSerialize（使用）注释日期getter对象以使用扩展的json序列化程序= CustomDateSerializer.class）

1. Extend JsonSerializer to create a new class for handling date formatting
2. Override serialize(Date date, JsonGenerator gen, SerializerProvider provider) function to format date in your desired format and write it back to generator instance (gen)
3. Annotate your date getter object to use your extended json serializer using @JsonSerialize(using = CustomDateSerializer.class)

代码：

//CustomDateSerializer class
public class CustomDateSerializer extends JsonSerializer<Date> {    
    @Override
    public void serialize(Date value, JsonGenerator gen, SerializerProvider arg2) throws 
        IOException, JsonProcessingException {      

        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
        String formattedDate = formatter.format(value);

        gen.writeString(formattedDate);

    }
}


//date getter method
@JsonSerialize(using = CustomDateSerializer.class)
public Date getDate() {
    return date;
}

资料来源： http://blog.seyfi.net/2010/03/how-to-control-date-formatting-when .html

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