springMVC3学习(一)--框架搭建
由于项目需要,学习下springMVC,在此简单记录一下。
如有十万个为什么,暂且忽略,待以后研究。
本人是基于3.1.1版本开发,如遇jar包版本冲突等其他问题,概不负责。下载地址:上传此zip资源文件,不知道CSDN为什么不给显示,或许相同的资源太多了吧,
大家可自行去下载,或者进群,共享里有。
一:新建web工程,spring001
忽略
二:添加springframework依赖jar包
将dist下的jar全部加进去 然后另加一个commons-logging.jar
三:修改web.xml
<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/config/springMVC.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springMVC</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping>
默认DispatcherServlet会加载WEB-INF/[DispatcherServlet的Servlet名字]-servlet.xml配置文件,
本示例为WEB-INF/springMVC-servlet.xml
默认路径为WEB-INF下,也可修改为如下配置
<init-param> <param-name>contextConfigLocation</param-name> <!-- <param-value>classpath:conf/springMVC.xml</param-value> --> <!-- <param-value>classpath:/conf/springMVC.xml</param-value> --> <!-- <param-value>classpath*:/conf/springMVC.xml</param-value> --> <!-- 以上三种形式也可以 --> <param-value>classpath:conf/springMVC.xml</param-value> </init-param>
四:添加springMVC配置文件
<?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:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" default-lazy-init="true" 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 http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd "> <!-- 默认扫描的包路径 --> <context:component-scan base-package="com.itmyhome" /> <!-- 添加注解驱动 --> <mvc:annotation-driven /> <!-- 定义跳转的文件的前后缀 --> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/" /> <!-- 默认放在WebRoot下 --> <property name="suffix" value=".jsp" /> </bean> </beans>PS:<context:component-scan base-package="com.itmyhome" />
base-package后的内容只是包路径,千万不能把类名也写出来 比如com.itmyhome.Login
否则会报如下错误
警告: No mapping found for HTTP request with URI [/spring001/login] in DispatcherServlet with name 'springMVC'
五:后台Action
package com.itmyhome; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; @Controller public class Login { @RequestMapping(value="login") public String login(){ System.out.println("*******已经进入*********"); return "welcome"; //即返回welcome.jsp } }
六:返回JSP
新建welcome.jsp 里面随便写点内容 如:Hello springMVC!
最后在浏览器中输入地址 验证 如图:
工程目录如下: