本項目旨在搭建一個簡單的SPRing MVC框架，了解Spring MVC的基礎配置等內容。
<context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring/app-context.xml</param-value></context-param>
然后添加Spring監聽器：
<listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><listener> <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class></listener><listener> <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class></listener>
接下來配置Spring MVC的dispatherservlet，同時配置該servlet要攔截的URL。
<servlet> <servlet-name>springmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring/mvc-servlet.xml</param-value> </init-param> <load-on-startup>1</load-on-startup></servlet><!-- 配置要攔截的URL --><servlet-mapping> <servlet-name>springmvc</servlet-name> <url-pattern>/</url-pattern></servlet-mapping>
最后，配置一個welcom-file-list。
<?xml version="1.0" encoding="UTF-8"?><web-appxmlns="http://java.sun.com/xml/ns/j2ee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"version="2.4"xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <!-- spring context 配置文件 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring/app-context.xml</param-value> </context-param> <!-- spring 監聽器配置 --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <listener> <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class> </listener> <!--spring 防內存溢出監聽器 --> <listener> <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class> </listener> <!-- spring mvc servlet配置文件 --> <servlet> <servlet-name>springmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring/mvc-servlet.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <!-- 配置要攔截的URL --> <servlet-mapping> <servlet-name>springmvc</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file></welcome-file> </welcome-file-list></web-app>
配置Spring MVC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:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd "> <mvc:resources location="/js/" mapping="/js/**"/> <bean class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor"/> <mvc:annotation-driven/> <context:annotation-config/> <mvc:default-servlet-handler/> <!--添加component掃描，使package下面的注解生效 --> <context:component-scan base-package="com.wxspringmvc.controller"/> <!--添加頁面視圖解析器--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/page/"/> <property name="suffix" value=".jsp"/> <property name="contentType" value="text/html;charset=UTF-8"/> </bean></beans>
配置applicationContext.xml
<%@ page contentType="text/html;charset=UTF-8" language="java" %><html><head> <title>請登錄</title></head><body><h5>this is index.jsp</h5><form action="/user/index" method="post"> <p>用戶名：</p><input type="text" id="username" name="username"> <p>密碼：</p><input type="passWord" id="password" name="password"> <p><input type="submit" value="提交"></p></form></body></html>
表單使用post的方式提交到/user/index路徑。
@Controller@RequestMapping(value = "/user")public class UserController { @RequestMapping(value = "/index" ,method= RequestMethod.POST) public ModelAndView userIndex(String username,String password){ ModelAndView mav = new ModelAndView("user/success"); mav.addObject("username",username); mav.addObject("password",password); return mav; }}
這里可以添加一個簡單的校驗，如果用戶名和密碼有一個為空，則不能提交：
@Controller@RequestMapping(value = "/user")public class UserController { @RequestMapping(value = "/index" ,method= RequestMethod.POST) public ModelAndView userIndex(String username,String password){ ModelAndView mav = new ModelAndView("user/success"); if(!matchParams( username, password)){ return new ModelAndView("/index"); } mav.addObject("username",username); mav.addObject("password",password); return mav; } private boolean matchParams(String username,String password){ if(isEmpty(username)||isEmpty(password)) return false; else return true; } private boolean isEmpty(String s){ if(s==null || "".equals(s)) return true; else return false; }}
View：登錄成功界面：success.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %><html> <head> <title>用戶首頁</title> </head> <body><p>用戶名：${username}</p><p>密碼：${password}</p> </body></html>
效果展示
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疑難解答
