以下示例演示如何使用Spring Web MVC框架的多動作控制器。 MultiActionController類用於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("home");
model.addObject("message", "Home");
return model;
}
public ModelAndView add(HttpServletRequest request,
HttpServletResponse response) throws Exception {
ModelAndView model = new ModelAndView("user");
model.addObject("message", "Add");
return model;
}
public ModelAndView remove(HttpServletRequest request,
HttpServletResponse response) throws Exception {
ModelAndView model = new ModelAndView("user");
model.addObject("message", "Remove");
return model;
}
}
URL映射配置檔如下 -
<bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>
<bean name="/home.html" class="com.zaixian.springmvc.UserController" />
<bean name="/user/*.html" class="com.zaixian.springmvc.UserController" />
例如，使用上面的配置，如果URI：
- 對於
/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：
- 創建一個名稱為 MultiActionController 的動態WEB專案。
- 在
com.zaixian.springmvc包下創建一個Java類UserController。 - 在
jsp子檔夾下創建兩個視圖檔：home.jsp和user.jsp。 - 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("home");
model.addObject("message", "Home");
return model;
}
public ModelAndView add(HttpServletRequest request,
HttpServletResponse response) throws Exception {
ModelAndView model = new ModelAndView("user");
model.addObject("message", "Add");
return model;
}
public ModelAndView remove(HttpServletRequest request,
HttpServletResponse response) throws Exception {
ModelAndView model = new ModelAndView("user");
model.addObject("message", "Remove");
return model;
}
}
MultiActionController-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.handler.BeanNameUrlHandlerMapping"/>
<bean name="/home.html"
class="com.zaixian.springmvc.UserController" />
<bean name="/user/*.html"
class="com.zaixian.springmvc.UserController" />
</beans>
home.jsp 的代碼如下所示 -
<%@ page contentType="text/html; charset=UTF-8" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Home</title>
</head>
<body>
<body>
<a href="user/add.html" >add()方法</a> <br>
<a href="user/remove.html" >remove()方法</a>
</body>
</html>
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，現在嘗試訪問URL => http://localhost:8080/MultiActionController/home.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/MultiActionController/add.html ， 如果Spring Web應用程式沒有問題，應該看到以下結果：
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