Java Spring 控制器响应未转换为 JSON

Question

I have the following method:

@RequestMapping(value = "/products/{productId}", method = RequestMethod.GET)
@ResponseBody
public ProductDTO getProductById()...{

//return populated ProductDTO.

}

ProductDTO have the following structure:

public class ProductDTO implement Serializable{
String id;
Double price;
Color color;
}
-----

public class Color implements Serializable {

String name;
String RgbValue;

}

The problem here is that the Color attribute isn't being marshalled: The JSON that I get in the response is the following:

{
"id" : "V6 Motor"
"price" : "616$"
"color" : "com.test.src.data.Color@16b7656b"
}

Why the Color isn't being marshalled ?

Answer 1

尝试覆盖 Color 的 toString 方法，因为我认为 Spring 试图将其视为字符串