In this tutorial you will learn about @PathVariable Annotation

@PathVariable Annotation

By using the @PathVariable annotation you can create the dynamic varible at the url and can access that varible from there as.

	/*
	 * Here pathVar is the new path variable when it finds the
	 * /param/process-form/pathVar it is copies by the @PathVariable into the
	 * pathVar variable.
	 * try url as when you are running application '/PathVariableAnnotation/param/client-req/productName'
	 */

	@RequestMapping(value = "/client-req/{pathVar}")
	public String processReq(Model model,
			@PathVariable("pathVar") String pathVar) {
		model.addAttribute("pathVar", pathVar);
		return "view-data";
	}

Please consider the complete controller class given below

SampleInterfaceImp.java

package roseindia.controller;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
@RequestMapping(value = "/param/")
public class ApplicationController {

	/*
	 * Here pathVar is the new path variable when it finds the
	 * /param/process-form/pathVar it is copies by the @PathVariable into the
	 * pathVar variable.
	 * try url as when you are running application '/PathVariableAnnotation/param/client-req/productName'
	 */

	@RequestMapping(value = "/client-req/{pathVar}")
	public String processReq(Model model,
			@PathVariable("pathVar") String pathVar) {
		model.addAttribute("pathVar", pathVar);
		return "view-data";
	}

	/*
	 * By using  @PathVariable you can also add new variable between the URL.
	 * try url as when you are running application '/PathVariableAnnotation/param/product/YourNewVarible/information'
	 */
	
	@RequestMapping(value = "/product/{productName}/information")
	public String anotherReq(Model model,
			@PathVariable("productName") String productName) {
		model.addAttribute("productName", productName);
		return "view-data";
	}
}

You can download the complete source code from here

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