项目：NetCore Web API

接口支持Json参数需要安装Newtonsoft.Json.Linq和Microsoft.AspNetCore.Mvc.NewtonsoftJson

Program代码

//支持json需要安装Microsoft.AspNetCore.Mvc.NewtonsoftJson
using Newtonsoft.Json.Serialization;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.

builder.Services.AddControllers();
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();

//支持json参数
builder.Services.AddControllers().AddNewtonsoftJson(options =>
{
    options.SerializerSettings.ContractResolver = new DefaultContractResolver();
});

var app = builder.Build();

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();
}

app.UseHttpsRedirection();

app.UseAuthorization();

app.MapControllers();

app.Run();

Controller代码

using Microsoft.AspNetCore.Mvc;
using Newtonsoft.Json.Linq;

namespace TestAPI.Controllers
{
    [ApiController]
    [Route("[controller]")]
    public class TestController : ControllerBase
    {   
        private readonly ILogger<TestController> _logger;
        public TestController(ILogger<TestController> logger)
        {
            _logger = logger;
        }

        [HttpPost]
        [Route("GetTest")]
        public JsonResult GetTest(JObject requestParObj)
        {
            return new JsonResult(requestParObj);
        }
    }
}

运行测试