spring mvc的简单搭建+各种jar包的导入

首先配置web.xml文件

<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" 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>oasystem</display-name> <!--中文编码 --> <filter> <filter-name>charsetEncoding</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> <init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>charsetEncoding</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- 核心配置 --> <servlet> <servlet-name>spring</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!-- 加载/WEB-INF/[servlet-name]-servlet.xml --> <load-on-startup>1</load-on-startup> <!--加载顺序--> </servlet> <servlet-mapping> <servlet-name>spring</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>

然后是spring-servlet.xml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" xmlns:task="http://www.springframework.org/schema/task" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-4.2.xsd"> <!-- 扫描路径 --> <context:component-scan base-package="oasystem.controller" > <!-- 默认注解注入 --> <mvc:annotation-driven /> <!-- 视图层配置 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <!-- 前缀 --> <property name="prefix" value="/WEB-INF/jsp/"/> <!-- 后缀 --> <property name="suffix" value=".jsp"/> </bean> </beans>

根据web.xml文件中org.springframework.web.servlet.DispatcherServlet的配置，首先需要导入spring-web-4.x.x.RELEASE.jar这个包。

运行报错 java.lang.NoClassDefFoundError: org/springframework/beans/factory/BeanNameAware

导入spring-beans-4.2.3.RELEASE.jar 运行报错 java.lang.NoClassDefFoundError: org/springframework/context/EnvironmentAware

导入spring-context-4.2.3.RELEASE.jar 运行，会提示服务器启动失败， 在控制台下会有这段报错 Caused by: java.lang.ClassNotFoundException: org.springframework.core.env.Environment

那就导入spring-core-4.2.3.RELEASE.jar 运行，这次可以启动而且报错也变了 Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory

OK接着导入commons-logging-1.1.3.jar 这个包不在官网下的spring-framework-4.2.3.RELEASE-dist.zip里，要重新下 运行报错java.lang.ClassNotFoundException: org.springframework.web.servlet.DispatcherServlet

DispatcherServlet没找到？刚开始不是导入过spring-web-4.x.x.RELEASE.jar吗？

原来DispatcherServlet虽然前缀是org.springframework.web.servlet可是它并不在spring-web-4.x.x.RELEASE.jar中 它在

spring-webmvc-4.x.x.RELEASE.jar

但是spring-web-4.x.x.RELEASE.jar也不能删除，删了服务器又无法启动报错 Caused by: java.lang.ClassNotFoundException: org.springframework.web.context.request.async.CallableProcessingInterceptor

接下来运行报错 Caused by: java.lang.NoClassDefFoundError: org/springframework/aop/TargetSource

导入spring-aop-4.2.3.RELEASE.jar 运行报错 Caused by: java.lang.ClassNotFoundException: org.springframework.expression.ParserContext

导入spring-expression-4.2.3.RELEASE.jar 运行通过~~~~

所以，最简单的SpringMVC框架需要8个包。

进入controller层

package oasystem.controller; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; //注解注入 @Controller @RequestMapping(value="/user") public class UserController { //路径 @RequestMapping(value="/index") public String user(){ //返回的jsp页面 return "index"; } }

然后在WEB-INF下建jsp文件，

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!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>主页</title> </head> <body> 这是主页 </body> </html>>

保存发布，然后在浏览器里输入 localhost:8080/oasystem/user/index （端口号8080或者8088/项目名称/Controller类上面注释的路径/类里面访问主页方法上面的路径）

回车就可以访问了。

另外：导入的包名中间的数字是版本号，可以根据实际情况自行选定。各种包都可以去Spring的官方网站上下载。