Spring MVC多动作控制器
以下示例演示如何使用Spring Web MVC框架的多动作控制器。 MultiActionController
类用于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("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映射配置文件如下 -
<bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>
<bean name="/home.html" class="com.yiibai.springmvc.UserController" />
<bean name="/user/*.html" class="com.yiibai.springmvc.UserController" />
例如,使用上面的配置,如果URI:
- 对于
/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:
- 创建一个名称为 MultiActionController 的动态WEB项目。
- 在
com.yiibai.springmvc
包下创建一个Java类UserController
。 - 在
jsp
子文件夹下创建两个视图文件:home.jsp
和user.jsp
。 - 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("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.handler.BeanNameUrlHandlerMapping"/>
<bean name="/home.html"
class="com.yiibai.springmvc.UserController" />
<bean name="/user/*.html"
class="com.yiibai.springmvc.UserController" />
</beans>
home.jsp 的代码如下所示 -
<%@ 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,现在尝试访问URL => http://localhost:8080/MultiActionController/home.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/MultiActionController/add.html , 如果Spring Web应用程序没有问题,应该看到以下结果: