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参数方法名称解析器。 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.zyiz.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", "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映射配置文件如下 -
<bean class="com.zyiz.springmvc.UserController"> <property name="methodNameResolver"> <bean class="org.springframework.web.servlet.mvc.multiaction.ParameterMethodNameResolver"> <property name="paramName" value="action"/> </bean> </property> </bean>
例如,使用上面的配置,如果URI:
/user/*.html?action=home
请求,DispatcherServlet
将请求转发到UserController
类的 home()
方法。/user/*.html?action=add
,DispatcherServlet
将请求转发到UserController
类的 add()
方法。/user/*.html?action=remove
,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:
com.zyiz.springmvc
包下创建一个Java类UserController
。jsp
子文件夹下创建一个视图文件:user.jsp
。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.zyiz.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)"); 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; } }
ParameterMethodNameResolver-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.zyiz.springmvc.UserController"> <property name="methodNameResolver"> <bean class="org.springframework.web.servlet.mvc.multiaction.ParameterMethodNameResolver"> <property name="paramName" value="action"/> </bean> </property> </bean> </beans>
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>
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/ParameterMethodNameResolver/user/test.html?action=add , 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/ParameterMethodNameResolver/user/test.html?action=remove , 如果Spring Web应用程序没有问题,应该看到以下结果: