Spring MVC環境搭建和配置

1. 建立Dynamic web project

2. 修改WEB-INF/web.xml,內容以下：

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee   
        http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
    <servlet>
        <servlet-name>springMvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/applicationContext.xml</param-value>
        </init-param>
    </servlet>
    <servlet-mapping>
        <servlet-name>springMvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>  

3. 建立/WEB-INF/applicationContext.xml,添加以下內容：

    <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">  
       
        <context:component-scan base-package="com.vito.action" />  
       
        <bean  
            class="org.springframework.web.servlet.view.InternalResourceViewResolver">  
            <property name="prefix">  
                            <!-- 這個配置是配置JSP頁面的位置，按照你本身的配置來配 -->  
                <value>/WEB-INF/view/</value>  
            </property>  
            <property name="suffix">  
                <value>.jsp</value>  
            </property>  
        </bean>  
       
    </beans>  

4. 建立java文件，注意package名字

package com.vito.action;  
  
import org.springframework.stereotype.Controller;  
import org.springframework.ui.ModelMap;  
import org.springframework.web.bind.annotation.RequestMapping;  
import org.springframework.web.bind.annotation.RequestMethod;  
  
@Controller  
@RequestMapping("/welcome")  
public class HelloWorldController {  
    @RequestMapping(value="/hello",method = RequestMethod.GET)  
    public String printWelcome(ModelMap model) {  
        model.addAttribute("message", "Spring 3 MVC Hello World");  
        return "hello";  
    }  
} 

5. 【關鍵】建立WEB-INF/lib,將以下jar包導入，注意不要填加多餘的包。因爲以前將全部的sping jar包導入，致使出錯，找緣由花了一天時間。

6. 將上面的jar加入build path

7. 試試http://localhost:8080/DemoSpringMVC/welcome/hello 吧！