Springmvc 简明教程

Spring MVC - Simple Url Handler Mapping Example

以下示例展示如何使用 Spring Web MVC 框架使用 Simple URL Handler Mapping。SimpleUrlHandlerMapping 类有助于将 URL 显式映射到其各自的控制器。

<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.handler.SimpleUrlHandlerMapping">
      <property name = "mappings">
         <props>
            <prop key = "/welcome.htm">welcomeController</prop>
            <prop key = "/helloWorld.htm">helloController</prop>
         </props>
      </property>
   </bean>

   <bean id = "helloController" class = "com.tutorialspoint.HelloController" />

   <bean id = "welcomeController" class = "com.tutorialspoint.WelcomeController"/>
</beans>

例如,使用以上配置,如果请求 URI

  1. /helloWorld.htm,DispatcherServlet 将会将请求转发到 HelloController

  2. /welcome.htm,DispatcherServlet 将会将请求转发到 WelcomeController

首先,让我们准备好一个运行的 Eclipse IDE,然后考虑以下步骤使用 Spring Web Framework 开发一个基于动态表单的 Web 应用程序。

Step

Description

1

如 Spring MVC 的 Hello World 章节中所述,在 com.tutorialspoint 包下创建一个以 TestWeb 命名的项目。

2

在 com.tutorialspoint 包下创建 Java 类 HelloController 和 WelcomeController。

3

在 jsp 子文件夹下创建视图文件 hello.jsp 和 welcome.jsp。

4

最后一步是创建源文件和配置文件的内容,然后按如下所述导出应用程序。

HelloController.java

package com.tutorialspoint;

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;
   }
}

WelcomeController.java

package com.tutorialspoint;

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;
   }
}

TestWeb-servlet.xml

<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.handler.SimpleUrlHandlerMapping">
      <property name = "mappings">
         <props>
            <prop key = "/welcome.htm">welcomeController</prop>
            <prop key = "/helloWorld.htm">helloController</prop>
         </props>
      </property>
   </bean>

   <bean id = "helloController" class = "com.tutorialspoint.HelloController" />

   <bean id = "welcomeController" class = "com.tutorialspoint.WelcomeController"/>
</beans>

hello.jsp

<%@ page contentType = "text/html; charset = UTF-8" %>
<html>
   <head>
      <title>Hello World</title>
   </head>
   <body>
      <h2>${message}</h2>
   </body>
</html>

welcome.jsp

<%@ page contentType = "text/html; charset = UTF-8" %>
<html>
   <head>
      <title>Welcome</title>
   </head>
   <body>
      <h2>${message}</h2>
   </body>
</html>

一旦创建好源代码和配置文件,就导出你的应用程序。右键单击你的应用程序,使用 Export → WAR File 选项,并将你的 TestWeb.war 文件保存到 Tomcat 的 webapps 文件夹中。

现在,启动你的 Tomcat 服务器并确保你可以使用标准浏览器访问 webapps 文件夹中的其他网页。如果 Spring Web 应用程序一切正常,尝试一下 URL − http://localhost:8080/TestWeb/helloWorld.htm ,我们将看到以下界面。

spring beanname urlmapping

尝试一下 URL http://localhost:8080/TestWeb/welcome.htm ,如果你的 Spring Web 应用程序一切正常,你应该会看到以下结果。

spring beanname urlmapping2