Spring MVC Error 400 The request sent by the client was syntactically incorrect

Question

This seems to be a common issue  I have gone all the answers given in SO but could not make it work I am trying to integrate Spring MVC Freemarker in already existing web application  It works fine for the GET request and Freemarker Template reads java object provided by Controller without any issue  But Form submission is not able to hit Controller method  Finally I made log4j work  Here is the error I am getting  Error      HandlerMethod details       Controller  application entry controller UserController      Method  public void application entry controller UserController handleSave java lang String        org springframework web bind MissingServletRequestParameterException   Required String parameter  action  is not present   Freemarker    lt form method  POST  action  save html  gt    ------------    lt input type  submit  class  btnnew  name  saveWithoutValidation  value  Save Without Validation  gt  lt  input gt     lt input type  submit  class  btnnew  name  submit  value  Submit  gt  lt  input gt   lt  form gt    context-root is PORTAL  spring-servlet xml   lt bean id  viewResolver  class  org springframework web servlet view freemarker FreeMarkerViewResolver  gt         lt property name  cache  value  true   gt         lt property name  prefix  value     gt         lt property name  suffix  value   ftl   gt    web xml   lt servlet gt           lt servlet-name gt spring lt  servlet-name gt           lt servlet-class gt              org springframework web servlet DispatcherServlet          lt  servlet-class gt           lt load-on-startup gt 1 lt  load-on-startup gt       lt  servlet gt       lt servlet-mapping gt           lt servlet-name gt spring lt  servlet-name gt           lt url-pattern gt   lt  url-pattern gt       lt  servlet-mapping gt    Controller   RequestMapping value   save   method RequestMethod POST      public void handleSave  RequestParam String action            if  action equals  submit                  System out println  Damn  You clicked submit                      else if  action equals  saveWithoutValidation                 System out println  Sweet  You want no string attached                        For logs I have tried to add log4j logger org springframework web DEBUG to my existing log4j properties but it didn t work

User · Answer

Based on the error   Required String parameter  action  is not present   There needs to be a request parameter named action present in the request for Spring to map the request to your handler handleSave   The HTML that you pasted shows no such parameter

User · Answer

Add BindingResult  parameter in your method  For reference please my code below   save  ModelAttribute Employee employee BindingResult bindingResult

User · Answer

I also had this issue and my solution was different  so adding here for any who have similar problem   My controller had    RequestMapping value     setPassword   method   RequestMethod POST  public String setPassword Model model   RequestParameter SetPassword setPassword                The issue was that this should be  ModelAttribute for the object  not  RequestParameter  The error message for this is the same as you describe in your question    RequestMapping value     setPassword   method   RequestMethod POST  public String setPassword Model model   ModelAttribute SetPassword setPassword

User · Answer

Another possible cause is to have the wrong order of RequestMapping attributes  As spring doc says       An  RequestMapping handler method can have a very flexible signatures    The supported method arguments and return values are described in the   following section  Most arguments can be used in arbitrary order with   the only exception of BindingResult arguments  This is described in   the next section    If you scroll down the doc  you will see that the BindingResult has to be immediatelly after the model attribute  since we can have multiple model objects per request and thus multiple bindings     The Errors or BindingResult parameters have to follow the model object   that is being bound immediately as the method signature might have   more than one model object and Spring will create a separate   BindingResult instance for each of them so the following sample won   t   work    Here are two examples      Invalid ordering of BindingResult and  ModelAttribute         RequestMapping method   RequestMethod POST  public String   processSubmit  ModelAttribute  pet   Pet pet  Model model    BindingResult result          Note  that there is a Model parameter in   between Pet and BindingResult  To get this working you have to reorder   the parameters as follows        RequestMapping method   RequestMethod POST  public String   processSubmit  ModelAttribute  pet   Pet pet  BindingResult result    Model model

User · Answer

Please keep your    lt form method  POST  action  XYZ  gt    RequestMapping value   XYZ   method RequestMethod POST      public void handleSave  RequestParam String action     Your form action attribute value must match to value of  RequestMapping  So that Spring MVC can resolve it   Also  as you told it is giving 404 after changing  for this  can you please check whether control is entering inside handleSave   method   I think  as you are not returning any thing from handleSave   method  you have to look at it   if it still not work  can you please post your spring logs   Also  make sure that your request should come like    PORTAL save   if there is anything between like PORTAL jsp save the mention in  RequestMapping value   jsp save

User · Answer

The  RequestParam String action suggests there is a parameter present within the request with the name action which is absent in your form  You must either    Submit a parameter named value e g   lt input name  action    gt  Set the required parameter to false within the  RequestParam e g   RequestParam required false

User · Answer

I was facing a similar issue and found that a few fields like Date were not getting a concrete value  once given the values things worked fine  Please make sure you do not have date or any other field present on the form which needs a concrete value

User · Answer

Controller trying to find the  action  value in bean but according to your example you have not set any bean name of  action   try to do name  action    RequestParam always find in the bean class

User · Answer

My problem was the lack of BindingResult parameter after my model attribute      RequestMapping method   RequestMethod POST  value     sign-up   consumes    application x-www-form-urlencoded       public ModelAndView registerUser  Valid  ModelAttribute UserRegistrationInfo userRegistrationInfo                                 HttpServletRequest httpRequest                                  HttpSession httpSession             After I added BindingResult my controller became   RequestMapping method   RequestMethod POST  value     sign-up   consumes    application x-www-form-urlencoded       public ModelAndView registerUser  Valid  ModelAttribute  UserRegistrationInfo userRegistrationInfo  BindingResult bindingResult                                  HttpServletRequest httpRequest                                  HttpSession httpSession          Check answer  sashok bg   sashko bg Mersi mnogo

User · Answer

CookieValue value  abc  required true  String m   when I changed required from  true to false it worked out

User · Answer

Your request mapping is  save  but your POST is to  save html  Changing the POST to  save should fix it

[java] Spring MVC: Error 400 The request sent by the client was syntactically incorrect

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