spring - 如何返回我的自定义 json 文件而不是生成 Spring Boot 的默认 json 文件？

Question

我有一个用于授权的休息 Controller :

@RestController
class AuthController {

    @PostMapping("/sign-up")
    fun signUp(@RequestBody signUpRequest: SignUpRequest): ResponseEntity<String> {
       some code here..
    }
}

signUp方法获取 SignUpRequest模型作为请求体。 SignUpRequest模型是:

enum class Role {
    @JsonProperty("Student")
    STUDENT,
    @JsonProperty("Tutor")
    TUTOR
}

data class SignUpRequest(
    val role: Role,
    val email: String,
    val password: String
)

当我做 /sign-up使用 JSON 发布请求:

{
    "role": "asdf",
    "email": "",
    "password": ""
}

它返回一个由 spring boot 生成的答案:

{
    "timestamp": "2020-02-12T05:45:42.387+0000",
    "status": 400,
    "error": "Bad Request",
    "message": "JSON parse error: Cannot deserialize value of type `foo.bar.xyz.model.Role` from String \"asdf\": not one of the values accepted for Enum class: [Student, Tutor]; nested exception is com.fasterxml.jackson.databind.exc.InvalidFormatException: Cannot deserialize value of type `foo.bar.xyz.model.Role` from String \"asdf\": not one of the values accepted for Enum class: [Student, Tutor]\n at [Source: (PushbackInputStream); line: 3, column: 10] (through reference chain: foo.bar.xyz.model.SignUpRequest[\"role\"])",
    "path": "/sign-up"
}

问题是:如何返回我的自定义 JSON 而不是默认生成的 JSON？

我想返回我的自定义 JSON，例如:

{
  "result": "Invalid user data are given",
  "errors": [
    {
      "fieldName": "ROLE",
      "text": "Given role does not exist"
    },
    {
      "fieldName": "EMAIL",
      "text": "EMAIL is empty"
    }
  ]
}

Answer 1

我建议您创建 ErrorContrller 来生成自定义 json 映射作为响应。然后当您在注册方法中捕获错误时，调用 ErrorContrllers 方法。
您可以从这里找到信息 link