springboot-返回图片数据

电玩女神 2022-02-21 05:40 257阅读 0赞

@ApiOperation(value = **"生成日程分享二维码"**)  
@RequestMapping(value = **"/pc/r/eventhandle/sharepic"**, method = RequestMethod.***POST*** )

@ResponseBody

@ApiImplicitParams(\{ @ApiImplicitParam(name = **"eventId"**, value = **"日程id"**, paramType = **"query"**, required = **true**)  
\})  
**public** Result.Base getEventSharePic(Long eventId, HttpServletRequest request, HttpServletResponse response) \{   
*    *User user = getRequestUser(request);  
    Result.Base result = **iEventHandleService**.getEventSharePic(eventId, user.getId(), response);  
    **return** result;  
\}

*// 生成日程分享二维码*  
@Override  
**public** Result.Base getEventSharePic(Long eventId, Long userId, HttpServletResponse response)\{   
    *// 通过userid和eventid获取usercalendar,没有则说明没权限*  
*    *UserCalendar userCalendar = **iUserCalendarDao**.getUserCalendarByEventId(userId, eventId);  
    **if** (userCalendar == **null** || userCalendar.getRights() > CalendarRightEnum.***EDIT***.getValue()) \{   
        *logger*.error(**"getEventSharePic error :\{\}, userId:\{\}, eventId\{\}"**,  
                ErrorCode.***NO\_RIGHT\_ERROR***, userId, eventId);  
        **return** ErrorCode.***NO\_RIGHT\_ERROR***;  
    \}  
  
    String shareUrl = **eventShareMiniUrl** \+ **"?id="** \+ eventId;  
    **try** \{   
        OutputStream out = response.getOutputStream();  
        response.setHeader(**"Content-Type"**,**"image/jpeg"**);  
        QrCodeCreateUtil.*createQrCode*(out, shareUrl,90, **"JPEG"**);  
    \} **catch** (IOException e) \{   
        e.printStackTrace();  
    \} **catch** (WriterException e) \{   
        e.printStackTrace();  
    \}  
    **return new** Result.Success<>();  
\}

运行在swaggerui中可以访问，并显示二维码图片，但是后台报错：

org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation

at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:287)

at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.handleReturnValue(RequestResponseBodyMethodProcessor.java:180)

at org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:82)

at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:119)

at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:877)

at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:783)

at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)

at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991)

at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925)

at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:974)

at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:877)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:661)

at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:851)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)