SpringBoot2处理表单数据，其中json是键的值

在这种情况下，我必须实现post方法来处理表单数据，其中json是键的值。每个JSON在内部表示一个对象

我可以通过RequestParam获取json作为字符串，然后使用Jackson转换为object

    @RequestMapping(value = "/rest/patient", consumes = {"multipart/form-data"},
                                                produces = "application/json", method= RequestMethod.POST)  
    public ResponseEntity<?> savePatient(@RequestParam("patient") String patient ) {
       // convert to Patient instance using Jackson

    }

@RequestMapping（value=“/rest/patient”，使用={“多部分/表单数据”}，
products=“application/json”，method=RequestMethod.POST）
public ResponseEntity savePatient（@RequestParam（“patient”）字符串patient）{
//使用Jackson转换为患者实例
}

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Spring boot是否有现成的映射？

我不相信有现成的映射

您可以向WebDataBinder使用的WebConversionService添加GenericConverter。您需要列出所有对象类型。如下所示：

import java.util.HashSet;
import java.util.Set;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.convert.TypeDescriptor;
import org.springframework.core.convert.converter.GenericConverter;
import org.springframework.stereotype.Component;

import com.fasterxml.jackson.databind.ObjectMapper;

@Component
public class JsonFieldConverter implements GenericConverter {

    @Autowired
    private ObjectMapper objectMapper;

    // Add a new ConvertiblePair for each type you want to convert json 
    // in a field to using the objectMapper. This example has Patient and Doctor
    private static Set<ConvertiblePair> convertibleTypes = new HashSet<>();
    static {
        convertibleTypes.add(new ConvertiblePair(String.class, Patient.class));
        convertibleTypes.add(new ConvertiblePair(String.class, Doctor.class));
    }

    @Override
    public Set<ConvertiblePair> getConvertibleTypes() {
        return convertibleTypes;
    }

    @Override
    public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
        try {
            return objectMapper.readValue(source.toString(), targetType.getType());
        } catch (Exception e) {
            // TODO deal with the error.
            return source;
        }

    }
}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.web.format.WebConversionService;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.InitBinder;

@ControllerAdvice
public class JsonFieldConfig {

    @Autowired
    private JsonFieldConverter jsonFieldConverter;

    @InitBinder
    private void bindMyCustomValidator(WebDataBinder binder) {
        ((WebConversionService)binder.getConversionService()).addConverter(jsonFieldConverter);
    }

}