How to make the RequestMapping to handle GET parameters in the url? For example i have this url
http://localhost:8080/userGrid?_search=false&nd=1351972571018&rows=10&page=1&sidx=id&sord=desc
(from jqGrid)
how should my RequestMapping look like? I want to get the parameters using HttpReqest
Tried this:
@RequestMapping("/userGrid")
public @ResponseBody GridModel getUsersForGrid(HttpServletRequest request)
but it doesn't work.
Use @RequestParam in your method arguments so Spring can bind them, also use the @RequestMapping.params array to narrow the method that will be used by spring. Sample code:
@RequestMapping("/userGrid",
params = {"_search", "nd", "rows", "page", "sidx", "sort"})
public @ResponseBody GridModel getUsersForGrid(
@RequestParam(value = "_search") String search,
@RequestParam(value = "nd") int nd,
@RequestParam(value = "rows") int rows,
@RequestParam(value = "page") int page,
@RequestParam(value = "sidx") int sidx,
@RequestParam(value = "sort") Sort sort) {
// Stuff here
}
This way Spring will only execute this method if ALL PARAMETERS are present saving you from null checking and related stuff.
?object[key]=value format and it didn't work
required=false and Optional<T> as parameter type e.g. @RequestParam(value="sort",required=false) Optional<String> sortYou can add @RequestMapping like so:
@RequestMapping("/userGrid")
public @ResponseBody GridModel getUsersForGrid(
@RequestParam("_search") String search,
@RequestParam String nd,
@RequestParam int rows,
@RequestParam int page,
@RequestParam String sidx)
@RequestParam String sord) {
value = "myname" if the method param and request param have the same name. I upvoted this answer though.This will get ALL parameters from the request. For Debugging purposes only:
@RequestMapping (value = "/promote", method = {RequestMethod.POST, RequestMethod.GET})
public ModelAndView renderPromotePage (HttpServletRequest request) {
Map<String, String[]> parameters = request.getParameterMap();
for(String key : parameters.keySet()) {
System.out.println(key);
String[] vals = parameters.get(key);
for(String val : vals)
System.out.println(" -> " + val);
}
ModelAndView mv = new ModelAndView();
mv.setViewName("test");
return mv;
}
@RequestParam(defaultValue = "{}") MultiValueMap<String, String>, then you will get a Map where each value is a List of Strings for the given key. You could then iterate over this to see if there are any keys you don't recognise. Map<String, String> works too, if you know for certain there won't be any repeated parameters.If you are willing to change your uri, you could also use PathVariable.
@RequestMapping(value="/mapping/foo/{foo}/{bar}", method=RequestMethod.GET)
public String process(@PathVariable String foo,@PathVariable String bar) {
//Perform logic with foo and bar
}
NB: The first foo is part of the path, the second one is the PathVariable
This works in my case:
@RequestMapping(value = "/savedata",
params = {"textArea", "localKey", "localFile"})
@ResponseBody
public void saveData(@RequestParam(value = "textArea") String textArea,
@RequestParam(value = "localKey") String localKey,
@RequestParam(value = "localFile") String localFile) {
}
You should write a kind of template into the @RequestMapping:
http://localhost:8080/userGrid?_search=${search}&nd=${nd}&rows=${rows}&page=${page}&sidx=${sidx}&sord=${sord}
Now define your business method like following:
@RequestMapping("/userGrid?_search=${search}&nd=${nd}&rows=${rows}&page=${page}&sidx=${sidx}&sord=${sord}")
public @ResponseBody GridModel getUsersForGrid(
@RequestParam(value = "search") String search,
@RequestParam(value = "nd") int nd,
@RequestParam(value = "rows") int rows,
@RequestParam(value = "page") int page,
@RequestParam(value = "sidx") int sidx,
@RequestParam(value = "sort") Sort sort) {
...............
}
So, framework will map ${foo} to appropriate @RequestParam.
Since sort may be either asc or desc I'd define it as a enum:
public enum Sort {
asc, desc
}
Spring deals with enums very well.
