Spring Web MVC - without XML

Spring Web MVC - without XML

how to configure a Spring Web MVC app without any XML thanks to Servlet 3.0.

here's the controller;

package de.incompleteco.spring.web.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
@RequestMapping("/simple")
public class SimpleController {

 @RequestMapping(method=RequestMethod.GET)
 public @ResponseBody String get() throws Exception {
  return "hello world";
 }
 
}

here's the @Configuration class

package de.incompleteco.spring.web;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;

@Configuration
@EnableWebMvc
@ComponentScan("de.incompleteco.spring.web")
public class WebAppConfig {
 
}

here's the Servlet 3.0 compliant bootstrap

package de.incompleteco.spring.web;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRegistration;

import org.springframework.web.WebApplicationInitializer;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.servlet.DispatcherServlet;

public class Bootstrap implements WebApplicationInitializer {

 @Override
 public void onStartup(ServletContext servletContext) throws ServletException {
  AnnotationConfigWebApplicationContext mvcContext = new AnnotationConfigWebApplicationContext();
  mvcContext.register(WebAppConfig.class);
  //register
  ServletRegistration.Dynamic dispatcher = servletContext.addServlet("dispatcher", new DispatcherServlet(mvcContext));
  dispatcher.setLoadOnStartup(1);
  dispatcher.addMapping("/app/*");
 }

}

and here's the JUnit test

package de.incompleteco.spring.web.controller;

import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
import static org.springframework.test.web.servlet.setup.MockMvcBuilders.webAppContextSetup;

import javax.annotation.Resource;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.web.WebAppConfiguration;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.web.context.WebApplicationContext;

import de.incompleteco.spring.web.WebAppConfig;

@RunWith(SpringJUnit4ClassRunner.class)
@WebAppConfiguration
@ContextConfiguration(classes={WebAppConfig.class})
public class SimpleControllerTest {

 @Resource
 private WebApplicationContext context;
 
 @Test
 public void testGet() throws Exception {
  //setup
  MockMvc mvc = webAppContextSetup(context).build();
  //execute
  mvc.perform(get("/simple")).andExpect(status().isOk()).andExpect(content().string("hello world"));
 }

}

and here's the sample up on github

https://github.com/incomplete-code/spring-web-config

Spring MVC - Internet Explorer 7 and JSON

Spring MVC - Internet Explorer 7 and JSON

here's a little "trick" i found out with IE 7... if you're ever in the situation where you need to send JSON directly to the client (say, in an IFrame scenario), IE7 will misunderstand the application/json type and pop up the download dialog.  so, to counter this in Spring MVC 3, add the following to the annotations for the MessageConverter...