Spring MVC- Storing and Retrieving @PathVariable Map<String, String>

Question

I have taken 2 PathVariable, and instead of taking these separately i want to store these 2 PathVariables in to a Map and want to retrieve it from the Map.

In Spring MVC 3.1.0 here is the my Controller class method:

@Controller
@RequestMapping("/welcome")
public class HelloController {

@RequestMapping(value="/{countryName}/{userName}",method=RequestMethod.GET)
public String getPathVar(@PathVariable Map<String, String> pathVars, Model model) {

    String name = pathVars.get("userName");
    String country = pathVars.get("countryName");

    model.addAttribute("msg", "Welcome " + name+ " to Spring MVC & You are from" + country);
    return "home";
}

My Request URL is : http://localhost:3030/spring_mvc_demo/welcome/India/ashrumochan123

But when giving request using this url, i am getting HTTP Status 400 -
Description: The request sent by the client was syntactically incorrect.

When i am taking these Path Variables separately then it is working fine. Here is the code -

@RequestMapping(value="/{countryName}/{userName}", method=RequestMethod.GET)
    public String goHome(@PathVariable("countryName") String countryName,
            @PathVariable("userName") String userName, Model model) {
        model.addAttribute("msg", "Welcome " + userName
                + " to Spring MVC& You are from " + countryName);
        return "home";
    }

Please tell me whether i am doing anything wrong?

Any help would be greatly appreciated.

I don't think what you are looking to do is possible. For starters, you are trying coerce a String into a Map, which is named inconsistently in your annotation and method signature. Why not just create the map in the controller method from the two parameters? — woemler
– woemler, Commented Mar 10, 2016 at 1:35
@woemler, thank you for your quick response, but this is possible. I have seen some video demonstration regarding this. But confused about the version of Spring MVC they are using. — Ashrumochan
– Ashrumochan, Commented Mar 10, 2016 at 1:52
Actually @Ashrumochan was true,the method is correct but something else is wrong, I have tried and it work well for me, can I know what spring version you use? — FreezY
– FreezY, Commented Mar 10, 2016 at 2:22
From Spring doc: If the method parameter is Map<String, String> or MultiValueMap<String, String> then the map is populated with all path variable names and values. Since: 3.0 — FreezY
– FreezY, Commented Mar 10, 2016 at 2:28
I'm using Spring 4.2.5.RELEASE, maybe you should check the client request, If problem still persist, try update your spring . — FreezY
– FreezY, Commented Mar 10, 2016 at 3:27

Community · Accepted Answer · 2017-05-23 12:32:55Z

0

According to the Spring documentation, it's been there since version 3.2.

For the @PathVariable with Map<String,String>, I think you are missing <mvc:annotation-driven/> on your Spring servlet configuration:

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
                    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd     
                    http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
                    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd">

<mvc:annotation-driven/>
...

I've found it on this link.

edited May 23, 2017 at 12:32

CommunityBot

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answered Mar 10, 2016 at 4:32

gender_madness

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3 Comments

Ashrumochan Over a year ago

i am using <mvc:annotation-driven/>

gender_madness Over a year ago

Can you provide your web and servlet xml? I couldn't reproduce this problem with only this information

Ashrumochan Over a year ago

Thanks @Auro Pimentel, Previously i was using Spring 3.1.1.RELEASE & now updated to Spring 4.1.6.RELEASE and now its working fine...

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