手写mvc之web.xml-优快云博客

本文介绍了一个web应用的web.xml配置示例，展示了如何设置监听器、Servlet及其映射，并提供了一个ModelMap类的具体实现，用于管理数据模型。

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web.xml

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xmlns="http://java.sun.com/xml/ns/javaee"
   xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
   xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
   http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">

<display-name>Archetype Created Web Application</display-name>

<context-param>
   <param-name>contextConfigLocation</param-name>
   <param-value>classpath*:applicationContext.xml,
               classpath*:applicationContext-server.xml
   </param-value>
</context-param>

<listener>
   <listener-class>com.xuchen.demo.listener.ClassLoadlistener</listener-class>
</listener>

<servlet>
   <servlet-name>dispatcherServlet</servlet-name>
   <servlet-class>com.xuchen.demo.servlet.DispatcherServlet</servlet-class>
   <init-param>
       <param-name>contextConfigLocation</param-name>
       <param-value>classpath*:springmvc-servlet.xml</param-value>
   </init-param>
   <load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
   <servlet-name>dispatcherServlet</servlet-name>
   <url-pattern>*.do</url-pattern>
</servlet-mapping>

</web-app>

modelMap

package com.xuchen.demo.view;

import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;

public class ModelMap implements Model {

   protected static Map<String, Map<String, Object>> DATACASHMAP;

   @Override
   public Map<String, Map<String, Object>> getModelMap() {
       if (null == DATACASHMAP) {
           DATACASHMAP = new LinkedHashMap<String, Map<String, Object>>();
       }
       return DATACASHMAP;
   }

   @Deprecated
   @Override
   public void addObject(String modelName, Object objectValue) {

   }

   @Override
   public void addAttribute(String attributeName, Object attributeValue) {
       Map<String, Object> lastMap = getModelMap().get("data");
       if (null == lastMap) {
           lastMap = new HashMap<String, Object>();
       }
       lastMap.put(attributeName, attributeValue);
       getModelMap().put("data", lastMap);
   }
}