


How to get the @RequestBody annotation in SpringBoot to correctly receive string parameters in non-JSON format?
Apr 19, 2025 pm 03:54 PM In Spring Boot applications, it is crucial to properly receive request parameters, especially string parameters in non-JSON format. This article will explore how to correctly receive such parameters using the @RequestBody
annotation.
We encounter a Spring Boot interface that receives string parameters using @RequestBody
annotation:
@ResponseBody @PostMapping(value = "/sendnews") public String sendContent(HttpServletRequest request, @RequestBody String lstMsgId) { System.out.println(lstMsgId); return lstMsgId; }
The request parameter is: "90c8c36f23a94c1487851129aa47d690/90c8c36f23a94c1487851129aa47d690". Postman sends this parameter directly and works normally, but when sending it using the Hutool tool class, the following error occurs:
<code>org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: ...; nested exception is com.alibaba.fastjson.JSONException: ...</code>
The root cause of the problem is that Spring Boot uses application/json
to process @RequestBody
parameter by default. Spring Boot treats it as JSON format when the argument is wrapped in double quotes. Therefore, for non-JSON string parameters, we need to explicitly specify the requested Content-Type
.
The solution is to set the requested Content-Type
to text/plain
. This way, Spring Boot won't try to parse it to JSON.
The code modified using the Hutool tool class is as follows:
HttpRequest request = HttpRequest.post(url); request.header("Content-Type", "text/plain"); request.body("90c8c36f23a94c1487851129aa47d690/90c8c36f23a94c1487851129aa47d690"); String responseJsonStr = request.execute().body();
By setting Content-Type: text/plain
, the @RequestBody
annotation can correctly receive string parameters in non-JSON format. This avoids unnecessary JSON parsing errors and ensures the stability and reliability of the interface.
The above is the detailed content of How to get the @RequestBody annotation in SpringBoot to correctly receive string parameters in non-JSON format?. For more information, please follow other related articles on the PHP Chinese website!

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