Spring MVC属性方法名称解析器

 

以下示例显示如何使用Spring Web MVC框架来实现多动作控制器的属性方法名称解析器。 MultiActionController类可在单个控制器中分别映射多个URL到对应的方法。

所下所示配置 -

package com.yiibai.springmvc;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.multiaction.MultiActionController;

public class UserController extends MultiActionController{

   public ModelAndView home(HttpServletRequest request,
      HttpServletResponse response) throws Exception {
      ModelAndView model = new ModelAndView("user");
      model.addObject("message", "主页面(Home方法)");
      return model;
   }

   public ModelAndView add(HttpServletRequest request,
      HttpServletResponse response) throws Exception {
      ModelAndView model = new ModelAndView("user");
      model.addObject("message", "添加(Add方法)");
      return model;
   }

   public ModelAndView remove(HttpServletRequest request,
      HttpServletResponse response) throws Exception {
      ModelAndView model = new ModelAndView("user");
      model.addObject("message", "删除(Remove方法)");
      return model;
   }
}

Java

URL映射配置文件如下 -

<bean class="com.yiibai.springmvc.UserController">
   <property name="methodNameResolver">
      <bean class="org.springframework.web.servlet.mvc.multiaction.PropertiesMethodNameResolver">
         <property name="mappings">
            <props>
               <prop key="/user/home.html">home</prop>
               <prop key="/user/add.html">add</prop>
               <prop key="/user/update.html">update</prop>      
            </props>
         </property>
      </bean>
   </property>
</bean>

XML

例如，使用上面的配置，如果URI：

• 对于/user/home.html请求，DispatcherServlet将请求转发到UserController类的 home()方法。
• 对于user/add.html，DispatcherServlet将请求转发到UserController类的 add()方法。
• 对于user/remove.html，DispatcherServlet将请求转发到UserController类的 remove()方法。

首先，让我们使用Eclipse IDE，并按照以下步骤使用Spring Web Framework开发基于动态表单的Web应用程序：

1. 创建一个名称为 PropertiesMethodNameResolver 的动态WEB项目。
2. 在 com.yiibai.springmvc 包下创建一个Java类UserController。
3. 在jsp子文件夹下创建一个视图文件：user.jsp。
4. 最后一步是创建所有源和配置文件的内容并运行应用程序，详细如下所述。

完整的项目文件目录结构如下所示 -

UserController.java 的代码如下所示 -

package com.yiibai.springmvc;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.multiaction.MultiActionController;

public class UserController extends MultiActionController{

   public ModelAndView home(HttpServletRequest request,
      HttpServletResponse response) throws Exception {
      ModelAndView model = new ModelAndView("user");
      model.addObject("message", "主页面(Home方法)");
      return model;
   }

   public ModelAndView add(HttpServletRequest request,
      HttpServletResponse response) throws Exception {
      ModelAndView model = new ModelAndView("user");
      model.addObject("message", "添加(Add方法)");
      return model;
   }

   public ModelAndView remove(HttpServletRequest request,
      HttpServletResponse response) throws Exception {
      ModelAndView model = new ModelAndView("user");
      model.addObject("message", "删除(Remove方法)");
      return model;
   }
}

Java

PropertiesMethodNameResolver-servlet.xml 的代码如下所示 -

<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"> 
      <property name="caseSensitive" value="true" />
   </bean>
   <bean class="com.yiibai.springmvc.UserController">
      <property name="methodNameResolver">
      <bean class="org.springframework.web.servlet.mvc.multiaction.PropertiesMethodNameResolver">
         <property name="mappings">
            <props>
               <prop key="/user/home.html">home</prop>
               <prop key="/user/add.html">add</prop>
               <prop key="/user/remove.html">remove</prop>
            </props>
         </property>
      </bean>
      </property>
   </bean>  
</beans>

XML

user.jsp 的代码如下所示 -

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

HTML

完成创建源和配置文件后，发布应用程序到Tomcat服务器。

现在启动Tomcat服务器，当访问URL => http://localhost:8080/PropertiesMethodNameResolver/user/add.html， 如果Spring Web应用程序没有问题，应该看到以下结果：

当访问URL => http://localhost:8080/PropertiesMethodNameResolver/user/remove.html ， 如果Spring Web应用程序没有问题，应该看到以下结果：