spring mvc - Could not find @PathVariable in @RequestMapping -

i have problem when running project. page , controller configure right. when add @requestmapping(value = "/edit/{id}", method = requestmethod.get) throw exception.

nestedservletexception: request processing failed; nested exception org.springframework.web.bind.annotation.support.handlermethodinvocationexception: failed invoke handler method [public org.springframework.web.servlet.modelandview com.solution.controller.booklistcontroller.edit(java.lang.string,org.springframework.ui.model)]; nested exception java.lang.illegalstateexception: not find @pathvariable [id] in @requestmapping 

help me. why problem throwed? page work when comment "edit" , "delete" methods

my controller:

@controller @requestmapping("/booklist.vw") public class booklistcontroller {      @autowired     private ibookservice bookservice;       @requestmapping(method = requestmethod.get)     protected modelandview openmain(httpservletrequest request, httpservletresponse response) throws exception {         map<string, object> model = new hashmap<string, object>();         list<book> books = bookservice.listbooks();         model.put("books", books);          return new modelandview("booklist", "model", model);     }      @requestmapping(value = "/edit/{id}", method = requestmethod.get)     public modelandview edit(@pathvariable string id, model model) {         map<string, object> models = new hashmap<string, object>();         models.put("id", id);         return new modelandview("editbook", "model", models);     }      @requestmapping(value = {"/delete/{id}"})     public modelandview delete(@pathvariable("id") integer id) {         bookservice.removebook(id);         return new modelandview(getmodelname());     } } 

my page fragment:

 <c:foreach items="${model.books}" var="book">         <tr align="left" height="100%">             <td>${book.name}</td>             <td>${book.description}</td>             <td>${book.year}</td>             <td></td>                 <%--<td>${book.authornames}</td>--%>             <sec:authorize access="hasrole('role_admin')">                 <td>                     <a href="${pagecontext.request.contextpath}/booklist.vw/edit/${book.id}">edit</a>                     <a href="${pagecontext.request.contextpath}/booklist.vw/delete/${book.id}">delete</a>                 </td>             </sec:authorize>         </tr>     </c:foreach> 

it seems have forget declaration in method head, please take look:

@controller @requestmapping("/booklist.vw") public class booklistcontroller {     ...      @requestmapping(value = "/edit/{id}", method = requestmethod.get)     public modelandview edit(@pathvariable("id") string id, model model) {         map<string, object> models = new hashmap<string, object>();         models.put("id", id);         return new modelandview("editbook", "model", models);     } ... }