Spring MVC屬性方法名稱解析器

以下示例顯示如何使用Spring Web MVC框架來實現多動作控制器的屬性方法名稱解析器。 MultiActionController類可在單個控制器中分別映射多個URL到對應的方法。

所下所示配置 -

package com.zaixian.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", "主頁面(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", "刪除(Remove方法)");
      return model;
   }
}

URL映射配置檔如下 -

<bean class="com.zaixian.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>

例如，使用上面的配置，如果URI：

• 對於/user/home.html請求，DispatcherServlet將請求轉發到UserController類的 home()方法。
• 對於user/add.html，DispatcherServlet將請求轉發到UserController類的 add()方法。
• 對於user/remove.html，DispatcherServlet將請求轉發到UserController類的 remove()方法。

首先，讓我們使用Eclipse IDE，並按照以下步驟使用Spring Web Framework開發基於動態表單的Web應用程式：

1. 創建一個名稱為 PropertiesMethodNameResolver 的動態WEB專案。
2. 在 com.zaixian.springmvc 包下創建一個Java類UserController。
3. 在jsp子檔夾下創建一個視圖檔：user.jsp。
4. 最後一步是創建所有源和配置檔的內容並運行應用程式，詳細如下所述。

完整的專案檔目錄結構如下所示 -

UserController.java 的代碼如下所示 -

package com.zaixian.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", "主頁面(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", "刪除(Remove方法)");
      return model;
   }
}

PropertiesMethodNameResolver-servlet.xml 的代碼如下所示 -

<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.zaixian.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>

user.jsp 的代碼如下所示 -

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

完成創建源和配置檔後，發佈應用程式到Tomcat伺服器。

現在啟動Tomcat伺服器，當訪問URL => http://localhost:8080/PropertiesMethodNameResolver/user/add.html ， 如果Spring Web應用程式沒有問題，應該看到以下結果：

當訪問URL => http://localhost:8080/PropertiesMethodNameResolver/user/remove.html ， 如果Spring Web應用程式沒有問題，應該看到以下結果：