Spring MVC - 如何在Rest Controller中将简单的String作为JSON返回 [英] Spring MVC - How to return simple String as JSON in Rest Controller

问题描述

我的问题基本上是的后续行动这个问题。

My question is essentially a follow-up to this question.

@RestController
public class TestController
{
    @RequestMapping("/getString")
    public String getString()
    {
        return "Hello World";
    }
}

在上面，Spring会添加Hello World进入响应机构。如何将String作为JSON响应返回？我知道我可以添加引号，但这更像是一个黑客。

In the above, Spring would add "Hello World" into the response body. How can I return a String as a JSON response? I understand that I could add quotes, but that feels more like a hack.

请提供任何示例来帮助解释这个概念。

Please provide any examples to help explain this concept.

注意：我不想直接写入HTTP Response主体，我想以JSON格式返回String（我正在使用我的控制器
， RestyGWT ，要求回复为有效的JSON
格式）。

Note: I don't want this written straight to the HTTP Response body, I want to return the String in JSON format (I'm using my Controller with RestyGWT which requires the response to be in valid JSON format).

推荐答案

返回 text / plain （如仅返回Spring MVC 3中的字符串消息控制器）或包裹你的String是一些对象

Either return text/plain (as in Return only string message from Spring MVC 3 Controller) OR wrap your String is some object

public class StringResponse {

    private String response;

    public StringResponse(String s) { 
       this.response = s;
    }

    // get/set omitted...
}

将您的回复类型设置为 application / json

@RequestMapping(value = "/getString", method = RequestMethod.GET, produces = "application/json")

你将拥有一个类似的JSON

and you'll have a JSON that looks like

{  "response" : "your string value" }

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