CODEWITHSUNDEEP
javajsonspring-mvc
Trant
Trant

Reputation: 3609

Error 400: Bad Request involving Timestamp within JSON object

I have a Spring 3 MVC Controller who has a @ModelAttribute parameter of an object

This object contains numerous properties, mostly strings/numbers. It has one java.sql.Timestamp property.

I call this method via browser, passing the properties as separate query string key/value pairs. When I do not pass a key/value pair for the Timestamp everything works fine, it loads the object with all my properties.

But as soon as I try to send a value for the Timestamp proeprty, I get an immediate Error 400: Bad request.

I know i have to send the data string in a specific format, but I just use a JsonDeserializer so that I can parse the string using the format that I want. But when I set a breakpoint inside my JsonDeserializer, it never gets hit. Spring seems to just ignore it. What did I miss?

Some code:

Controller:

@RequestMapping(headers = "Accept=application/json;charset=utf-8", value = "/doSomething", method = RequestMethod.GET)
    @ResponseBody
    public ReturnObject doSomething(@ModelAttribute MyObject obj, HttpServletRequest request) throws Exception {    
    //blah blah
}

MyObject:

public class MyObject {
    private Integer someNumber;
    private String someString;
    @JsonDeserialize(using=ShortDateDeserializer.class)
    private Timestamp someTimestamp;
    // getter/setters like usual....
}

ShortDateDeserializer:

public class ShortDateDeserializer extends JsonDeserializer<Timestamp> {

    Logger logger = Logger.getLogger(ShortDateDeserializer.class);

    @Override
    public Timestamp deserialize(JsonParser parser, DeserializationContext ctx) throws IOException, JsonProcessingException {

        try {
            String rawDate = parser.getText();

            SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yyyy");
            return new Timestamp(sdf.parse(rawDate).getTime());
        } catch (Exception e) {
            logger.error("Failed to parse date: "+parser.getText());
            throw new IOException("Failed to parse date: "+parser.getText());
        }
    }
}

When I call my service only setting the number/string like so:

localhost/doSomething?someNumber=1&someString=xyz

Works fine.

When I also attempt to set a value for the timstamp:

localhost/doSomething?someNumber=1&someString=xyz&someTimestamp=09/15/2013

I get an immediate Error 400: bad request.

What did I miss in order to get spring to use my custom timestamp parsing code when populating MyObject?

Upvotes: 0

Views: 2189

Answers (1)

luizcarlosfx
luizcarlosfx

Reputation: 409

Use @RequestBody instead of @ModelAttribute.

Upvotes: 1

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