org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'multipart/form-data;bounda

浅浅的花香味﹌ 2023-10-10 10:29 6阅读 0赞

今天在编写SpringBoot 文件上传遇到这样的错误：org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'multipart/form-data;bounda

特此记录下：

错误的Controller 代码：

@ApiOperation(httpMethod = "POST", value = "文件块上传")
    	@RequestMapping(value = "/upload", method = { RequestMethod.POST })
    	@ResponseBody
    	public Result upload(
    			@RequestBody @ApiParam(name = "文件块对象", value = "表单对象")ChunkInfoModel         
                entity, HttpServletRequest request, HttpServletResponse response) {
    
    			UploadFileCallback callback = new UploadFileCallback(entity, "upload", config.getLocation());
    			Future<Result> result = this.uploadExecutor.submit(callback);
    			try {
    				return result.get();
    			} catch (InterruptedException e) {
    				// TODO Auto-generated catch block
    				log.error(e.getMessage());
    				e.printStackTrace();
    			} catch (ExecutionException e) {
    				// TODO Auto-generated catch block
    				log.error(e.getMessage());
    				e.printStackTrace();
    			}
    		return Result.ok("文件块上传成功");
    	}

正确的Controoler 代码：

@ApiOperation(httpMethod = "POST", value = "文件块上传")
    	@RequestMapping(value = "/upload", method = { RequestMethod.POST })
    	@ResponseBody
    	public Result upload(
    			ChunkInfoModel entity,
    			HttpServletRequest request, HttpServletResponse response) {
    
    			UploadFileCallback callback = new UploadFileCallback(entity, "upload", config.getLocation());
    			Future<Result> result = this.uploadExecutor.submit(callback);
    			try {
    				return result.get();
    			} catch (InterruptedException e) {
    				// TODO Auto-generated catch block
    				log.error(e.getMessage());
    				e.printStackTrace();
    			} catch (ExecutionException e) {
    				// TODO Auto-generated catch block
    				log.error(e.getMessage());
    				e.printStackTrace();
    			}
    		return Result.ok("文件块上传成功");
    	}

原因：首先你在 **multipart/form-data** 就不能使用 **@RequestBody**

**@RequestBody 的用法：**

1. 该注解用于读取Request请求的body部分数据，使用系统默认配置的HttpMessageConverter进行解析，然后把相应的数据绑定到要返回的对象上；

2. 再把HttpMessageConverter返回的对象数据绑定到 controller中方法的参数上。

springboot 默认配置核心代码，涉及请求request数据转换配置：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n_size_16_color_FFFFFF_t_70][]

总结：RequestBody 支持的请求方式和内容类型

<table style="width:500px;"> 
 <tbody> 
  <tr> 
   <td>请求方式</td> 
   <td style="width:192px;">内容方式</td> 
   <td style="width:219px;">支持/不支持</td> 
  </tr> 
  <tr> 
   <td>POST/GET</td> 
   <td style="width:192px;">application/x-www-form-urlencoded</td> 
   <td style="width:219px;">支持@RequestParam、支持@RequestBody</td> 
  </tr> 
  <tr> 
   <td>POST/GET</td> 
   <td style="width:192px;">&nbsp;multipart/form-data</td> 
   <td style="width:219px;">不支持@RequestBody</td> 
  </tr> 
  <tr> 
   <td>POST/GET</td> 
   <td style="width:192px;">application/json、application/xml</td> 
   <td style="width:219px;">支持@RequestBody</td> 
  </tr> 
  <tr> 
   <td>PUT</td> 
   <td style="width:192px;">application/x-www-form-urlencoded</td> 
   <td style="width:219px;">支持@RequestParam、支持@RequestBody</td> 
  </tr> 
  <tr> 
   <td>PUT</td> 
   <td style="width:192px;">&nbsp;multipart/form-data</td> 
   <td style="width:219px;">不支持@RequestBody</td> 
  </tr> 
  <tr> 
   <td>PUT</td> 
   <td style="width:192px;">application/json、application/xml</td> 
   <td style="width:219px;">支持@RequestBody</td> 
  </tr> 
 </tbody> 
</table>

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20191009145942285.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n,size_16,color_FFFFFF,t_70