MultiActionController与ParameterMethodNameResolver
在一个Controller类中定义多个方法，并根据使用者的请求来执行当中的某个方法，相当于Struts的DispatcherAction。使用MultiActionController需要配个MethodNameResolver实例，默认使用ParameterMethodNameResolver，他会根据所给的网址中，最后请求的参数来决定执行Controller中的哪一个方法
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1.控制器类继承MultiActionController
package com.ljq.web.controller;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.web.servlet.ModelAndView;import org.springframework.web.servlet.mvc.multiaction.MultiActionController;/** * 实现一个controller写多个方法 * * @author Administrator * */public class MultiController extends MultiActionController { public ModelAndView add(HttpServletRequest request, HttpServletResponse response) { System.out.println("----add----"); return new ModelAndView("/test", "message", "add"); } public ModelAndView update(HttpServletRequest request, HttpServletResponse response) { System.out.println("----update----"); return new ModelAndView("/test", "message", "update"); } public ModelAndView query(HttpServletRequest request, HttpServletResponse response) { System.out.println("----query----"); return new ModelAndView("/test", "message", "query"); }}?
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2.定义控制方法按如下格式
public ModelAndView add(HttpServletRequest request, HttpServletResponse response) { System.out.println("----add----"); return new ModelAndView("/test", "message", "add"); }?
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3.在dispatcher-servlet.xml文件中引入多视图控制
<bean id="paramMethodResolver" class="org.springframework.web.servlet.mvc.multiaction.ParameterMethodNameResolver"> <property name="paramName" value="action"></property> </bean>
然后注入自己的控制器类
<bean id="multi" class="com.ljq.web.controller.MultiController"> <property name="methodNameResolver"> <ref bean="paramMethodResolver"/> </property> </bean>
完整的配置如下:
<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd"> <bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping"> <property name="mappings"> <props> <prop key="/multi.do">multiController</prop> </props> </property> </bean> <!--配置由参数action来决定调用MultiActionController中的哪个方法--> <bean id="paramMethodResolver" class="org.springframework.web.servlet.mvc.multiaction.ParameterMethodNameResolver"> <property name="paramName" value="action"></property> </bean> <!--配置MultiActionController--> <bean id="multiController" class="com.ljq.web.controller.MultiController"> <property name="methodNameResolver"> <ref bean="paramMethodResolver"/> </property> </bean> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/"></property> <property name="suffix" value=".jsp"></property> </bean> </beans>
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4.完善或者添加一个视图(test.jsp)，对应控制器类的跳转
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><[email protected] prefix="c" uri="http://java.sun.com/jsp/jstl/core"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>实现一个controller写多个方法</title> </head> <body> 本次调用方法是<b>${message }</b> </body></html>
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5.部署，启动
访问路径：
http://localhost:8083/springmvc/multi.do?action=add
http://localhost:8083/springmvc/multi.do?action=update
http://localhost:8083/springmvc/multi.do?action=query