Combine GET and POST request methods in Spring

Question

I have a resource that supports both GET and POST requests  Here a sample code for a sample resource    RequestMapping value     books   method   RequestMethod GET  public ModelAndView listBooks  ModelAttribute  booksFilter   BooksFilter filter  two  RequestParam parameters  HttpServletRequest request      throws ParseException           LONG CODE      RequestMapping value     books   method   RequestMethod POST  public ModelAndView listBooksPOST  ModelAttribute  booksFilter   BooksFilter filter  BindingResult result          throws ParseException           SAME LONG CODE with a minor difference     The code in the two methods is practically the same  except for lets say a variable definition  The two methods can be easily combined using method    RequestMethod POST  RequestMethod GET   and a simple if inside  I tried  but it doesn t work  because the two methods have a different parameter at the end  i e  HttpServletRequest and BindingResult  the  RequestParam s are not required and therefore not needed in the POST request   Any ideas how to combine the two methods

User · Answer

Below is one of the way by which you can achieve that, may not be an ideal way to do.

Have one method accepting both types of request, then check what type of request you received, is it of type "GET" or "POST", once you come to know that, do respective actions and the call one method which does common task for both request Methods ie GET and POST.

@RequestMapping(value = "/books")
public ModelAndView listBooks(HttpServletRequest request){
     //handle both get and post request here
     // first check request type and do respective actions needed for get and post.

    if(GET REQUEST){

     //WORK RELATED TO GET

    }else if(POST REQUEST){

      //WORK RELATED TO POST

    }

    commonMethod(param1, param2....);
}

User · Answer

RequestMapping value     testonly   method     RequestMethod GET  RequestMethod POST    public ModelAndView listBooksPOST  ModelAttribute  booksFilter   BooksFilter filter           RequestParam required   false  String parameter1           RequestParam required   false  String parameter2           BindingResult result  HttpServletRequest request           throws ParseException        LONG CODE and SAME LONG CODE with a minor difference     if  RequestParam required   true  then you must pass parameter1 parameter2   Use BindingResult and request them based on your conditions   The Other way    RequestMapping value     books   method   RequestMethod GET  public ModelAndView listBooks  ModelAttribute  booksFilter   BooksFilter filter        two  RequestParam parameters  HttpServletRequest request  throws ParseException        myMethod          RequestMapping value     books   method   RequestMethod POST  public ModelAndView listBooksPOST  ModelAttribute  booksFilter   BooksFilter filter           BindingResult result  throws ParseException        myMethod         do here your minor difference    private returntype myMethod        LONG CODE

User · Answer

RequestMapping value     books   method     RequestMethod GET   RequestMethod POST    public ModelAndView listBooks  ModelAttribute  booksFilter   BooksFilter filter       HttpServletRequest request       throws ParseException      your code      This will works for both GET and POST   For GET if your pojo BooksFilter  have to contain the attribute which you re using in request parameter  like below  public class BooksFilter   private String parameter1  private String parameter2        getters and setters   URl should be like below   books parameter1 blah  Like this way u can use it for both GET and POST

[spring] Combine GET and POST request methods in Spring

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