SpringBoot 1.5.2：我進行PUT RequestMethod時缺少必需的請求正文

Question

當我想測試REST應用程序時，我嘗試編寫如下的測試代碼段：

控制器代碼：

import org.springframework.util.MultiValueMap;
import org.springframework.web.bind.annotation.*;

@RestController
@RequestMapping(value="/Test")
public class test {

    @RequestMapping(value="test1/{modelId}",method = RequestMethod.POST)
    public void test1(@PathVariable(value="modelId") String modelId,     @RequestBody MultiValueMap<String, String> values){
        String name = values.getFirst("name");
        String description = values.getFirst("description");
        System.out.println(modelId);
        System.out.println(name);
        System.out.println(description);
    }

    @RequestMapping(value="test2",consumes="application/x-www-form-urlencoded",method = RequestMethod.PUT)
    public void test2( @RequestBody MultiValueMap<String, String> values){
        String name = values.getFirst("name");
        String description = values.getFirst("description");
          System.out.println(name);
          System.out.println(description);
    }
}

下面是Ajax調用函數：

function start() {
    var data1 = "test";
    var data2 = "test model";

    var jdata = {name:data1,description:data2};
    $.ajax({
        type: "PUT",
        async: false,
        url: "/Test/test2",
        dataType: "json",
        contentType: "application/x-www-form-urlencoded;charset=UTF-8",
        data: jdata,
        success: function (data) {
            alert("ok");
        }
    });
}

當我致電http://localhost:8080/Test/test1/123時，我可以獲得正確的結果。 但是當我嘗試調用http://localhost:8080/Test/test2 ，控制台顯示警告：

WARN  o.s.w.s.m.support.DefaultHandlerExceptionResolver - Failed to read HTTP message:
org.springframework.http.converter.HttpMessageNotReadableException:
Required request body is missing:
public void com.wisto.util.test.test2(org.springframework.util.MultiValueMap<java.lang.String, java.lang.String>)

瀏覽器會顯示400錯誤。

我想我一定想念一下SpringBoot的配置。 我該如何解決？

為了更清晰，我將來自Activiti的True Code包org.activiti.rest.editor.model;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;

import org.activiti.editor.constants.ModelDataJsonConstants;
import org.activiti.engine.ActivitiException;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.repository.Model;
import org.apache.batik.transcoder.TranscoderInput;
import org.apache.batik.transcoder.TranscoderOutput;
import org.apache.batik.transcoder.image.PNGTranscoder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.util.MultiValueMap;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.bind.annotation.RestController;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;

/**
 * @author Tijs Rademakers
*/
@RestController
public class ModelSaveRestResource implements ModelDataJsonConstants {

  protected static final Logger LOGGER =    LoggerFactory.getLogger(ModelSaveRestResource.class);

  @Autowired
  private RepositoryService repositoryService;

  @Autowired
  private ObjectMapper objectMapper;

  @RequestMapping(value="/model/{modelId}/save", method = RequestMethod.PUT)
  @ResponseStatus(value = HttpStatus.OK)
  public void saveModel(@PathVariable String modelId, @RequestBody MultiValueMap<String, String> values) {
    try {

      Model model = repositoryService.getModel(modelId);

      ObjectNode modelJson = (ObjectNode)   objectMapper.readTree(model.getMetaInfo());

      modelJson.put(MODEL_NAME, values.getFirst("name"));
      modelJson.put(MODEL_DESCRIPTION, values.getFirst("description"));
      model.setMetaInfo(modelJson.toString());
      model.setName(values.getFirst("name"));

      repositoryService.saveModel(model);

      repositoryService.addModelEditorSource(model.getId(), values.getFirst("json_xml").getBytes("utf-8"));

      InputStream svgStream = new ByteArrayInputStream(values.getFirst("svg_xml").getBytes("utf-8"));
      TranscoderInput input = new TranscoderInput(svgStream);

      PNGTranscoder transcoder = new PNGTranscoder();
      // Setup output
      ByteArrayOutputStream outStream = new ByteArrayOutputStream();
      TranscoderOutput output = new TranscoderOutput(outStream);

      // Do the transformation
      transcoder.transcode(input, output);
      final byte[] result = outStream.toByteArray();
      repositoryService.addModelEditorSourceExtra(model.getId(), result);
      outStream.close();

    } catch (Exception e) {
      LOGGER.error("Error saving model", e);
      throw new ActivitiException("Error saving model", e);
    }
  }
}

上面的代碼在Spring上很好用，但是在SpringBoot上很好用，所以我很困惑！

Answer 1

我認為您的數據對象不會轉換為字符串作為有效負載。 嘗試： data:JSON.stringify(jdata)

內容類型也應該是：

contentType: "application/json; charset=utf-8"

Answer 2

更改ajax中的dataType參數。 您的代碼指定數據類型為JSON，但控制器作為application/x-www-form-urlencoded

您可以將其設置為dataType: 'text'

或者，如果您對請求使用JSON，則更改以下內容

1. 在控制器中consumes=MediaType.APPLICATION_JSON_VALUE
2. 在ajax參數contentType: "application/json"