Recently I've started using of Srping MVC for my web apps.
1) Download Spring framework and put spring.jar to web server lib path.
2) Add DispathServlet mapping to web.xml
<servlet>
<servlet-name><strong>spring</strong></servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>spring</servlet-name>
<url-pattern>/index.jsp</url-pattern>
</servlet-mapping>
3) We have called servler instance as spring, so we should create a spring-servlet.xml at WEB-INF.
<xml>
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="mappings">
<props>
<prop key="/*.jsp">dispatchController</prop>
</props>
</property>
</bean>
<bean id="dispatchController" class="my.SimpleController">
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix">
<value>/WEB-INF/jsp/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
</beans>
</xml>
We described 3 beans here.
urlMaping - is a mapping bean. It should not be registered manually. Spring will automatically parse it during initialization.
dispatchController - is a bean, which will be dispath all requests of *.jsp pages. We write class="my.SimpleController", so we need to create class SimpleController later.
viewResolver - is a bean? which will add prefix and suffix to views for creating valid request.
4) Create class my.SimpleController
package my;
import org.springframework.web.servlet.mvc.Controller;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class SimpleController implements Controller {
public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
ModelAndView mav = new ModelAndView("index");
return mav;
}
}
This class will dispath all requests to the "index" view. Then "index" view will be changed to "/WEB-INF/jsp/index.jsp" by viewResolver bean.
5) Create "/WEB-INF/jsp/index.jsp".
<html>
<body>
"Hello, world!" with Spring MVC.
</body>
</html>
That's all.
Tuesday, July 31, 2007
"Hello, world" with Spring MVC
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