Ch10: Controllers and Routing

Question 1

Define request

Answer 1

In exchange of data between client and server, the client sends the request to a specific URL

Question 2

Define response

Answer 2

In the exchange of data between client and server, the response is a message returned by the server

Question 3

@Controller

Answer 3

Annotation designating given class as a controller

Question 4

@GetMapping(“pathname”)

Answer 4

Designates controller action. If GET request made to this path, the method will be called

Question 5

Use a ____ annotation any time controller needs to respond to requests

Answer 5

Mapping

Question 6

@RequestMapping

Answer 6

Can handle more than one method (ex: GET and POST). Can be applied at class level to designate base path for all methods in class

Question 7

It’s a best practice to place all controller classes in their own _____

Answer 7

subpackage (note: pkgs are lowercase in Java)

Question 8

Why are routes important?

Answer 8

Help determine which requests get sent to which controller

Question 9

Define query string

Answer 9

Extro info included at end of URL (key=value&key=value)

Question 10

Dynamic vs Static response

Answer 10

Static - requests to same path will always return the same response.
Dynamic - response will change based on data sent in the request

Question 11

@RequestParam

Answer 11

Annotation used before argument in a controller method. Lets handler method know to look for a query string

Question 12

@PathVariable

Answer 12

Annotation used before argument in a controller method. Lets handler method know to look for a path variable

Question 13

Describe how you would redirect a user

Answer 13

Remove @ResponseBody annotation (if any) and return redirect:/DESIREDPATH

Question 14

How does action function in the following form tag?

”

Answer 14

Action specifies the path the form will be submitted at

Question 15

What is the default method of a form tag

Answer 15

GET

Question 16

How would you set up a controller method to handle both POST and GET requests in Spring

Answer 16

Use the @RequestMapping annotation.

@RequestMapping(method = {RequestMethod.GET, RequestMethod.POST}, value = “examplePath”)

Question 17

How do you associate a form field with a request method parameter?

Answer 17

Make the input name parameter the same as the request parameter name.

Example:

””

public String hello(@RequestParam String coder) {
return “Hello, “ + coder + “!”;
}