“服务器拒绝了此请求，因为请求实体的格式不受请求的方法所请求的资源支持。”

Question

我是新的春季MVC。我运行了一个api，但显示错误。

我正在使用Tomcat 8.5服务器

import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestHeader;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import com.apex.dto.MmsuserDto;
import com.apex.manager.ApexManager;
import com.apex.mapper.MmsuserDtoToMmsuserModelMapper;
import com.apex.model.MmsuserModel;
import com.apex.util.ApexResponse;

@RestController
public class ApexApi extends AbstractApi {

    private static final Logger LOG = Logger.getLogger(ApexApi.class);

    @Autowired
    private ApexManager apexManager;

    @RequestMapping(value = "/sample", method = RequestMethod.GET)
    public String welcome() {
        return "Welcome to Apex RestTemplate Example.";
    }

    @RequestMapping(value = "/authenticate", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE, headers="Content-Type=application/json")
    public ResponseEntity<MmsuserModel> authenticate(@RequestBody MmsuserModel model) {

        final MmsuserDto dto = apexManager.authenticateMmsuser(model.getUserid(), model.getPwd());
        final MmsuserModel mmsuserModel = MmsuserDtoToMmsuserModelMapper.INSTANCE.toModel(dto);
        LOGGED_IN_USER_MAP.put(mmsuserModel.getToken(), mmsuserModel);
        LOG.info("successfully authenticated");

        return new ResponseEntity<MmsuserModel>(mmsuserModel, HttpStatus.OK);
    }

    @RequestMapping(value = "/logout", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)
    public ResponseEntity<ApexResponse> logout(@RequestHeader(value = "Authorization") String token) {
        ApexResponse response = new ApexResponse();
        response.setCode(HttpStatus.OK.value());
        response.setMessage(apexManager.logout(token));
        return new ResponseEntity<ApexResponse>(response, HttpStatus.OK);
    }
}

它应该运行以显示有意义的结果，但不幸的是它显示

''' HTTP状态415-

类型状态报告

消息

描述服务器拒绝了此请求，因为请求实体的格式不受请求的方法所请求的资源支持。 '''