The difference between WebService @QueryParam @DefaultValue @PathParam

1 See @queryparam first.
First look at the example:

Java code

Path ("/users")  Public classUserService {@GET @Path ("/query")      PublicResponse getusers (@QueryParam ("From")intFrom , @QueryParam ("To")intto, @QueryParam ("List<string>")) {           returnResponse. Status (200). Entity (Getusers is called, from: ' + from + ', to: ' + to+ ", by" +orderby.tostring ()). build (); }   }

URL input is: users/query?from=100&to=200&orderby=age&orderby=name
At this point, the output is: Getusers is called, from:100, to:200, Orderby[age, name]
Note that, unlike @pathparam, @queryparam specifies that the parameters in the URL appear as key-value pairs, while in the program
The @QueryParam ("from") int is read out of the value of the from in the URL,
In @pathparem, only the value of the parameter appears in the URL, no key-value pairs, such as: "/users/2011/06/30"

The

Java code

@GET     @Path ("{year}/{month}/{day}")     public  Response getuserhistory (             @ Pathparam (int year ,             @PathParam (int  month,              @PathParam (  int Day ) {          = year + '/' + month + '/' + day ;           return Response.Status         . Entity ("Getuserhistory is called, Year/month/day:" + date)         . Build () ;       

The output is:
Getuserhistory is called, YEAR/MONTH/DAY:2011/6/30

2 Get it in a dynamic way:

Java code

@Path ("/users")  Public classUserService {@GET @Path ("/query")      PublicResponse getusers (@Context uriinfo info) {String from= Info.getqueryparameters (). GetFirst ("from"); String to= Info.getqueryparameters (). GetFirst ("to"); List<String> = Info.getqueryparameters (). Get ("by"); returnResponse. Status (200). Entity (Getusers is called, from: ' + from + ', to: ' + to+ ", by" +orderby.tostring ()). build (); }

Url;users/query?from=100&to=200&orderby=age&orderby=name
The output is:
Getusers is called, from:100, to:200, Orderby[age, name]
Note that the two parameters after the order is read into the list processing.

3 @DefaultValue, default value

Example:

Java code

@Path ("/users")  Public classUserService {@GET @Path ("/query")      PublicResponse getusers (@DefaultValue ("" ") @QueryParam (" from ")intFrom , @DefaultValue ("999") @QueryParam ("to")intto, @DefaultValue ("Name") @QueryParam ("list<string>")) {           returnResponse. Status (200). Entity (Getusers is called, from: ' + from + ', to: ' + to+ ", by" +orderby.tostring ()). build (); }

Url:users/query

Output: Getusers is called, from:1000, To:999,orderby[name]

That's a good understanding.

The difference between WebService @QueryParam @DefaultValue @PathParam