以下示例显示如何使用Spring Web MVC框架使用Controller类名称处理程序映射. ControllerClassNameHandlerMapping 类是基于约定的处理程序映射类,它将URL请求映射到配置中提到的控制器的名称.此类获取Controller名称并将它们转换为小写,带有前导"/".
例如 : HelloController映射到"/hello *"URL.
<beans> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name = "prefix" value = "/WEB-INF/jsp/"/> <property name = "suffix" value = ".jsp"/> </bean> <bean class = "org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping"/> <bean class = "com.IT屋.HelloController" /> <bean class = "com.IT屋.WelcomeController"/> </beans>
例如,使用上述配置,如果URI
/helloWorld.htm或/hello {any letter} .htm被请求,DispatcherServlet会将请求转发给 HelloController .
请求
/welcome.htm,DispatcherServlet会将请求转发给 WelcomeController .
/Welcome.htm是被请求的其中W是大写的,DispatcherServlet将找不到任何控制器,服务器将抛出404状态错误.
首先,让它开始吧我们有一个可用的Eclipse IDE,并按照后续步骤使用Spring Web Framework开发基于动态表单的Web应用程序.
Step | 描述 |
---|---|
1 | 在Spring MVC - H中解释,在com.it1352包下创建一个名为TestWeb的项目ello World chapter. |
2 | 创建Java类com.it1352包下的HelloController和WelcomeController. |
3 | 在jsp子文件夹下创建视图文件hello.jsp,welcome.jsp. |
4 | 最后一步是创建源文件和配置文件的内容并导出应用程序,如下所述. |
package com.it1352; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.web.servlet.ModelAndView; import org.springframework.web.servlet.mvc.AbstractController; public class HelloController extends AbstractController{ @Override protected ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response) throws Exception { ModelAndView model = new ModelAndView("hello"); model.addObject("message", "Hello World!"); return model; } }
package com.it1352; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.web.servlet.ModelAndView; import org.springframework.web.servlet.mvc.AbstractController; public class WelcomeController extends AbstractController{ @Override protected ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response) throws Exception { ModelAndView model = new ModelAndView("welcome"); model.addObject("message", "Welcome!"); return model; } }
<beans xmlns = "http://www.springframework.org/schema/beans" xmlns:context = "http://www.springframework.org/schema/context" xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation = " http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"> <bean class = "org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name = "prefix" value = "/WEB-INF/jsp/"/> <property name = "suffix" value = ".jsp"/> </bean> <bean class = "org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping"/> <bean class = "com.IT屋.HelloController" /> <bean class = "com.IT屋.WelcomeController"/> </beans>
<%@ page contentType="text/html; charset = UTF-8" %> <html> <head> <title>Hello World</title> </head> <body> <h2>${message}</h2> </body> </html>
<%@ page contentType = "text/html; charset=UTF-8" %> <html> <head> <title>Welcome</title> </head> <body> <h2>${message}</h2> </body> </html>
完成创建源文件和配置文件后,导出应用程序.右键单击应用程序,使用 Export → WAR文件选项并将 TestWeb.war 文件保存在Tomcat的webapps文件夹中.
现在,启动Tomcat服务器并确保能够使用标准浏览器从webapps文件夹访问其他网页.尝试一下URL : http://localhost:8080/TestWeb/helloWorld.htm 如果Spring Web Application的一切正常,我们将看到以下屏幕.
尝试URL http://localhost:8080/TestWeb/hello .htm 如果弹出Web应用程序一切正常,我们将看到以下屏幕.
尝试URL http://localhost:8080/TestWeb/welcome.htm ,我们将看到以下屏幕,如果使用Spring Web Application一切正常.
尝试URL http://localhost:8080/TestWeb/Welcome.htm 我们将看到以下屏幕,如果一切使用Spring Web Application很好.