Spring MVC Missing URI template variable

Question

I have a Controller class with a function that saves a record to the Database  I am passing several parameters to the Controller function however i think i may be writing the  RequestMapping incorrectly  Under is the code  Controller    RequestMapping value  createRoadBlock htm   method   RequestMethod POST   public  ResponseBody Integer createRoadBlock  RequestParam String purpose   RequestParam String userName                                                 RequestParam  int status   RequestParam double latAdd                                                 RequestParam double longAdd  HttpServletRequest request                                                  HttpServletResponse response              int roadBlockId   0          try               roadBlockId   roadBlockManager saveRoadBlock purpose  userName  status latAdd longAdd               logger info  Create Road Block Successful roadBlockId    roadBlockId                return roadBlockId            catch Exception e               logger error  Exception Occured In Road Block Controller   e getMessage                 return roadBlockId                        Ajax Request    ajax       type  POST       url  createRoadBlock htm       contentType  application json       async false      cache false          data  purpose f purpose  userName f userName status  f status latAdd  f latAdd  longAdd f lngAdd       dataType  json          success function recordId                    console log  Road Block created with id     recordId             Error Log  Controller  com crimetrack web RoadBlockController  Method  public java lang Integer com crimetrack web RoadBlockController createRoadBlock java lang String java lang String int double double javax servlet http HttpServletRequest javax servlet http HttpServletResponse    org springframework web bind MissingServletRequestParameterException  Required String parameter  purpose  is not present     at org springframework web method annotation RequestParamMethodArgumentResolver handleMissingValue RequestParamMethodArgumentResolver java 201      at org springframework web method annotation AbstractNamedValueMethodArgumentResolver resolveArgument AbstractNamedValueMethodArgumentResolver java 90      at org springframework web method support HandlerMethodArgumentResolverComposite resolveArgument HandlerMethodArgumentResolverComposite java 75      at org springframework web method support InvocableHandlerMethod getMethodArgumentValues InvocableHandlerMethod java 156      at org springframework web method support InvocableHandlerMethod invokeForRequest InvocableHandlerMethod java 117      at org springframework web servlet mvc method annotation ServletInvocableHandlerMethod invokeAndHandle ServletInvocableHandlerMethod java 96      at org springframework web servlet mvc method annotation RequestMappingHandlerAdapter invokeHandlerMethod RequestMappingHandlerAdapter java 617      at org springframework web servlet mvc method annotation RequestMappingHandlerAdapter handleInternal RequestMappingHandlerAdapter java 578      at org springframework web servlet mvc method AbstractHandlerMethodAdapter handle AbstractHandlerMethodAdapter java 80      at org springframework web servlet DispatcherServlet doDispatch DispatcherServlet java 923      at org springframework web servlet DispatcherServlet doService DispatcherServlet java 852      at org springframework web servlet FrameworkServlet processRequest FrameworkServlet java 882      at org springframework web servlet FrameworkServlet doPost FrameworkServlet java 789      at javax servlet http HttpServlet service HttpServlet java 647      at javax servlet http HttpServlet service HttpServlet java 728      at org apache catalina core ApplicationFilterChain internalDoFilter ApplicationFilterChain java 305      at org apache catalina core ApplicationFilterChain doFilter ApplicationFilterChain java 210      at org apache catalina core StandardWrapperValve invoke StandardWrapperValve java 222      at org apache catalina core StandardContextValve invoke StandardContextValve java 123      at org apache catalina authenticator AuthenticatorBase invoke AuthenticatorBase java 472      at org apache catalina core StandardHostValve invoke StandardHostValve java 171      at org apache catalina valves ErrorReportValve invoke ErrorReportValve java 99

User · Answer

This error may happen when mapping variables you defined in REST definition do not match with @PathVariable names.

Example: Suppose you defined in the REST definition

@GetMapping(value = "/{appId}", produces = "application/json", consumes = "application/json")

Then during the definition of the function, it should be

public ResponseEntity<List> getData(@PathVariable String appId)

This error may occur when you use any other variable other than defined in the REST controller definition with @PathVariable. Like, the below code will raise the error as ID is different than appId variable name:

public ResponseEntity<List> getData(@PathVariable String ID)

User · Answer

PathVariable is used to tell Spring that part of the URI path is a value you want passed to your method  Is this what you want  or are the variables supposed to be form data posted to the URI   If you want form data  use  RequestParam instead of  PathVariable   If you want  PathVariable  you need to specify placeholders in the  RequestMapping entry to tell Spring where the path variables fit in the URI  For example  if you want to extract a path variable called contentId  you would use    RequestMapping value     whatever  contentId    method   RequestMethod POST   Edit  Additionally  if your path variable could contain a     and you want that part of the data  then you will need to tell Spring to grab everything  not just the stuff before the        RequestMapping value     whatever  contentId       method   RequestMethod POST   This is because the default behaviour of Spring is to treat that part of the URL as if it is a file extension  and excludes it from variable extraction

User · Answer

I got this error for a stupid mistake  the variable name in the  PathVariable wasn t matching the one in the  RequestMapping  For example   RequestMapping value     whatever    contentId      method   RequestMethod POST  public     method  PathVariable Integer   contentID         It may help others

[java] Spring MVC Missing URI template variable

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