接收content-type=multipart/form-data的表单数据

import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import java.util.Map;

@RestController
@RequestMapping("/api")
public class FormDataController {

    @PutMapping(value = "/submit", consumes = "multipart/form-data")
    public String handleFormData(@RequestParam Map<String, String> formData, 
                  @RequestParam(value = "file", required = false) MultipartFile file) {
        // 输出表单数据
        formData.forEach((key, value) -> System.out.println(key + ": " + value));

        // 如果上传了文件，打印文件信息
        if (file != null) {
            System.out.println("File name: " + file.getOriginalFilename());
        }

        return "Form data received successfully!";
    }
}