I am trying to pass parameters from JSP to the Spring MVC controller. However the controller doesn't get called. I have read many related posts regarding this and have tried various solutions provided but it's not working for me.
My web.xml looks like this:
<display-name>MyList</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>mylist</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>mylist</servlet-name>
<url-pattern>/welcome.jsp</url-pattern>
<url-pattern>/welcome.html</url-pattern>
<url-pattern>*.html</url-pattern>
</servlet-mapping>
My Controller:
#RequestMapping(path = "/subcategory/{id}", method = RequestMethod.GET)
public String findSubcategory(#PathVariable int id,Model model) {
List<Category> subCategoryList = this.myListDao.getSubCategories(id);
model.addAttribute("subcategories", subCategoryList);
return "searchCategory" ;
}
The relevant code from My JSP is as follows
<spring:url value="/subcategory/1" var="formUrl"/>
<c:forEach var="category" varStatus="status" items="${categories}">
<li>${category.description}</li>
</c:forEach>
It works when I have the url as /subcategory.html and have #RequestMapping("/subcategory") in my controller. When I use /subcategory/1 and change the corresponding request mapping, it does not work. I have tried various url patterns such as <url-pattern>/mylist/*</url-pattern><url-pattern>/MyList/*</url-pattern>etc. but nothing is working. I would really appreciate any help in solving this. Thanks a lot in advance.
Your current servlet mapping is overriding the default or root servlet mapping,
<servlet-mapping>
<servlet-name>mylist</servlet-name>
<url-pattern>/welcome.jsp</url-pattern>
<url-pattern>/welcome.html</url-pattern>
<url-pattern>*.html</url-pattern>
</servlet-mapping>
Your following mapping allows any request with *.html to be accepted hence your invocation to /subcategory.html worked without any issues.
<url-pattern>*.html</url-pattern>
Instead it should be changed to,
<servlet-mapping>
<servlet-name>mylist</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
Some points to remember,
<url-pattern>/*</url-pattern>
This pattern is usually recommended with Filter to continue with filter chaining. Using this pattern otherwise will make you to take care of all responsibilities like serving static resources etc to be handled explicitly.
#RequestMapping(path = "/subcategory/{id}", method = RequestMethod.GET)
instead of path, you should use value, like this:
#RequestMapping(value = "/subcategory/{id}", method = RequestMethod.GET)
Your call cannot reach the controller because your request mapping "/subcategory/{id}" does not match any url-patterns defined with your dispatcher servlet. You can try replacing these lines:
<url-pattern>/welcome.jsp</url-pattern>
<url-pattern>/welcome.html</url-pattern>
<url-pattern>*.html</url-pattern>
with
<url-pattern>/*</url-pattern>
Related
I'm currently trying to understand how the Dispatcher Servlet works with the Rest Controller ,but Postman returns 404 on everything I tried thus far.
The rest controller
#RestController
#RequestMapping(value = "/applications")
public class ApplicationController {
private static final Logger logger = LoggerFactory.getLogger(ApplicationController.class);
#Autowired
#Qualifier("ApplDAO")
private ApplDAO applDAO;
#Autowired
ApplicationService objServices;
#RequestMapping(value = "for_user\\{username:\\d+}", method = RequestMethod.GET)
public Application getApp(#PathVariable("username") String username){
Application app = applDAO.getByUsername(username);
return app;
}
}
My web.xml
<!-- The definition of the Root Spring Container shared by all Servlets and Filters -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring4-servlet.xml</param-value>
</context-param>
<!-- Creates the Spring Container shared by all Servlets and Filters -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- Processes application requests -->
<servlet>
<servlet-name>springDispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springDispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
I tried using url-pattern /* but with no results.
This is the url I was trying to access http://localhost:8080/project/applications/for_user/username:acid
Is there something wrong with the URL I'm using or have I used the dispatcher wrong.
Here is the spring error
No mapping found for HTTP request with URI [/project/applications/for_user/username:acid
Answered by JB Nizet
Why do you use backslashes instead of slashes in your RequestMapping?
Why do you use the regex \d+ if you want to send username:acid (or
acid?) as user name. Just use value = "/for_user/{username}", and use
http://localhost:8080/project/applications/for_user/acid.
I need to add Restful URL in existing spring based web service.
Each URL is well mapped but after clicking Restful URL such as
http://localhost:9090/Mercury/rest/invoice,
all contextroot path is changed as http://localhost:9090/Mercury/rest
The point is that I want to use both restful(/rest) and *.do URL pattern
How can I set contextroot path up without /rest ?
web.xml
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>rest</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>2</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>rest</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
Controller
#Controller
#RequestMapping("/rest")
public class InvoiceController {
#RequestMapping(value="/{name}", method=RequestMethod.GET)
public String getInvoice(#PathVariable String name, Model model) {
model.addAttribute("name", name);
return "rest.body";
}
Please refer Spring Pet Clinic on github, to learn how to configure various views.Sample view config xml. Here is the outline.
The ContentNegotiatingViewResolver delegates to the
InternalResourceViewResolver and BeanNameViewResolver, and uses the
requested media type (determined by the path extension) to pick a
matching view. When the media type is 'text/html', it will delegate to
the InternalResourceViewResolver's JstlView, otherwise to the
BeanNameViewResolver.
Currently I got a problem when I configure my springmvc web project.
Below is my web.xml
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>0</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/api/*</url-pattern>
</servlet-mapping>
And I defined my dispatcher-servlet.xml like this
<context:component-scan base-package="xxx.controller"
<mvc:annotation-driven />
And in package xxx.controller I define a class TestController
#Controller
#RequestMapping(value="/api")
public class TestController {
#RequestMapping(value = "/hello")
#ResponseBody
public String hello(){
System.out.println("comming hello");
return "hello world";
}
}
Now when I start tomcat, and want to access to localhost:8080/testproject/api/hello, The spring informs me
[10:10:58|WARN |(org.springframework.web.servlet.PageNotFound)]=[No mapping found for HTTP request with URI [/testproject/api/hello] in DispatcherServlet with name 'dispatcher']
But if I modify the url-pattern in web.xml to
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
It is ok to access to localhost:8080/testproject/api/hello. I do not know why this happens. I do want to use /api/* rather than /.
Could anyone helps me configure the controller path mapping? Many thanks!
You are telling your application to run in /api context when you define the following:
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/api/*</url-pattern>
</servlet-mapping>
so to access your controller the URL would have to be localhost:8080/api/api/hello
Just get rid of the /api from your dispatcher as you have and then your mapping should automatically default to localhost:8080/api/hello and work.
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
Otherwise if you want to run your application in /api context always you have the option of removing #RequestMapping(value="/api") from your controller.
That way it only recognises the mapping on method.
I have spring application, in which I use org.apache.cxf for soap and spring MVC for displayng some pages.
My web.xml contains two servlets :CXFServlet and mvc-dispatcher
<servlet>
<servlet-name>CXFServlet</servlet-name>
<servlet-class>org.apache.cxf.transport.servlet.CXFServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>CXFServlet</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>mvc-dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>WEB-INF/servlet-context.xml</param-value>
</init-param>
<load-on-startup>2</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>mvc-dispatcher</servlet-name>
<url-pattern>/hello</url-pattern>
</servlet-mapping>
When I has been used #ResponseBody in my controller everything was fine.
#Controller
#RequestMapping("/hello")
#ResponseBody
public class HelloController {
#RequestMapping(method = RequestMethod.GET)
public String printWelcome() {
return "hello" ;
}
}
but then i was needed to use jsp I have to use the following
#Controller
#RequestMapping("/hello")
public class HelloController {
#RequestMapping(method = RequestMethod.GET)
public ModelAndView printWelcome(ModelMap model) {
model.addAttribute("message", "hello");
return new ModelAndView("hello") ;
}
}
and when I request http://localhost:8080/hello I get "No service was found" instead of "hello"
I found that if I delete following from web.xml
<servlet>
<servlet-name>CXFServlet</servlet-name>
<servlet-class>org.apache.cxf.transport.servlet.CXFServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet>
<servlet-name>CXFServlet</servlet-name>
<servlet-class>org.apache.cxf.transport.servlet.CXFServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
my controller works fine.
The Servlet container you are using is matching CXFServlet instead of mvc-dispatcher for the URI http://localhost:8080/hello, resulting in your request being sent to CXFServlet, and the error message "No service was found" being returned by CXFServlet. To quote the Servlet 3.0 spec,
Versions of this specification prior to 2.5 made use of these mapping
techniques as a suggestion rather than a requirement, allowing servlet
containers to each have their different schemes for mapping client
requests to servlets.
http://download.oracle.com/otndocs/jcp/servlet-3.0-fr-eval-oth-JSpec/
You will likely need to configure you CXFServlet mapping to something else, e.g.
<servlet-mapping>
<servlet-name>CXFServlet</servlet-name>
<url-pattern>/services/*</url-pattern>
</servlet-mapping>
You might want to mention the container (Tomcat, Glassfish, etc.) that you are using, as there could also be a bug preventing this from working correctly.
I have a web application with Spring MVC.
web.xml
<servlet>
<servlet-name>spring</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>spring</servlet-name>
<url-pattern>*.do</url-pattern>
<url-pattern>/companies/*</url-pattern>
</servlet-mapping>
spring controller method:
class RealmInfoController{
#ResponseBody
#RequestMapping(value = {"/companies/{companyId}/realms/{realmName}"})
public RealmInfo realmInfo(#PathVariable long companyId, #PathVariable String realmName)
Handler match:
http://localhost:6122/context/companies/15877/realms/firstRealm
When the server gets this url, the spring servlet gets called. but it cannot match the controller method.
But if I change the request mapping to "/{companyId}/realms/{realmName}" then it matches the controller method. But it is not nice to define the url mapping without '/companies'. Can Spring be instructed in some way to look for match including the url pattern specified in the servlet?
Thanks.
if you want to use "companies" in request mapping you should map your dispatcher servlet to the root:
<url-pattern>/*</url-pattern>