How Spring controller handles parameter implicitly?

Question

I am a newbie on Spring framework and maybe this is an easy question.

I have a link as follows and attempt Spring controller handles the value"201610061023" of this link.However,my code did not work.

I know this value can be attached as a parameter or pathvariable in path but I just curious can I pass this value implicitly?

Thank you very much.

<a href="./Order" name="test">201610061023</a>

@RequestMapping(value = "/Order")
public String requestHandlingMethod(@ModelAttribute("test") String name, HttpServletRequest request) {
    return "nextpage";
}

score 0 · Answer 1 · edited May 23 '17 at 12:06

Your a-tag is wrong, you need to submit the id, there is no implicit way to submit the link-text (except a lot of java script code)!

 <a href="./Order/201610061023" name="test">201610061023</a>


@RequestMapping(value = "/Order/{orderId}")
public String requestHandlingMethod(@PathVariable("orderId") long orderId, @ModelAttribute("test") String name, HttpServletRequest request) {
    return "nextpage";
}

or

 <a href="./Order?orderId=201610061023" name="test">201610061023</a>


@RequestMapping(value = "/Order")
public String requestHandlingMethod(@RequestParam("orderId") long orderId, @ModelAttribute("test") String name, HttpServletRequest request) {
    return "nextpage";
}

See @RequestParam vs @PathVariable for the difference between this two approaches

Thank you for help.I know these two ways and in this case I want to find an implicit way of passing parameter. — Roaid, Oct 11 '16 at 12:13

score 0 · Accepted Answer · answered Oct 11 '16 at 12:13

Spring will not handle the title of the link simply because the title of the link will not be sent by the browser. To send it you can either:

add the value as parameter: <a href="./Order?id=201610061023" name="test">201610061023</a>
add the value as path variable: <a href="./Order/201610061023" name="test">201610061023</a>
add a JavaScript that will copy the title onClick into the href or send the generated URL with document.location. This can be automated, but it's pretty uncommon.

How Spring controller handles parameter implicitly?

2 Answers2