SpringBoot中实现接收文件和对象

@PostMapping(value = "/upload")    
@ResponseBody    
public String handleFileUpload(HttpServletRequest request) {    
MultipartHttpServletRequest params=((MultipartHttpServletRequest) request);  
// 获取文件
List<MultipartFile> files = ((MultipartHttpServletRequest) request).getFiles("file");   
// 获取参数
String name=params.getParameter("name");  

public class UserFileReq {
    // 参数
    private String username;
    // 文件
    private MultipartFile file;
    // 省略get\set
}
@PostMapping(value = "/upload")    
@ResponseBody    
public String handleFileUpload(UserFileReq req) {    
// 文件和参数 都在实体中了
}

@PostMapping(value = "/upload")    
@ResponseBody    
public String handleFileUpload(MultipartFile file) {    
}

{
 "timestamp": 1571196217195,
 "status": 415,
 "error": "Unsupported Media Type",
 "exception": "org.springframework.web.HttpMediaTypeNotSupportedException",
 "message": "Content type 'multipart/form-data;boundary=2gOOYeFBpE;charset=UTF-8' not supported",
 "path": "/file/upload"
}