将多个参数从角度传递到休息服务

Question

I am trying to pass the data to my rest services through $http.get() using URL.There are 10-12 parameters which I need to pass.

Angular script.js

$http.get('rest/test/getAllData/?filter1='$scope.filter1 + 
           '&filter2='$scope.filter2 + '&filter3='$scope.filter3 + 
           '&filter4='$scope.filter4)

The scope variables would come as undefined sometimes.But I guess that will not be a problem.I checked the console, the URL is getting formed correctly with all 12-13 parameters.

Now I am trying to get this in rest service using @QueryParam like below -

@path("/getAllData")
@GET
@Produces({..}
public response getAllData(@QueryParam("filter1") final String filter1,
                           @QueryParam("filter2") final String filter2,
                           @QueryParam("filter3") final String filter3){
}

The problem is that the @QueryParam is working for 2 parameters but when I am increasing the number of parameters, it is failing. As per the browser console, I am getting 404 error .

Is there any limitation to the number of parameters we can pass? I need to pass 12-13 parameters.How can I achieve this?

Update -

I was able to resolve my issue . I was using Date datatype in @QueryParam because of which it was throwing 404 error . Changed it to String and it worked . Did not know that we cannot use Date in QueryParam .

Apologies for not putting the detailed problem .

Answer 1

If you want to do it in the proper RESTful way then you can try like this, I have given it for couple of variables, but you can do for any.

@RequestMapping(path = "/rest/test/getAllData/{filter1}/{filter2}", method = RequestMethod.GET)
public Data getAllData(@PathVariable String filter1, @PathVariable String filter2) {
  // code here
}

You can also achieve it using RequestParam, an example below, ensure your parameters matches

@RequestMapping(path = "/rest/test/getAllData", method = RequestMethod.GET)
public Data getAllData(@RequestParam String filter1, @RequestParam String filter2) {
// code here

}

If you still have a complicated structure then send it as a POST with the JSON data in the request body

@RequestMapping(path = "/rest/test/getAllData", method = RequestMethod.POST, consumes = "application/json")
public Book getAllData(@RequestBody ObjectKey objectKey) {
// code here

}

Answer 2

For passing more number of parameters, you can use Rest parameter. It is used to access indefinite number of arguments passed to a function.

Syntax :

function add (...numbers){}

Answer 3

 const params = new HttpParams()
  .set('paramName1', value1)
  .set('paramNmae2', value2);
   return this.httpClient.get<IMyObject[]>(this.myUrl, {params} ).pipe(
        tap(data=>console.log('ALL:'+JSON.stringify(data))),
    catchError(this.handleError));