Springmvc入门案例（1）
据说，现在springmvc火了，好多企业都在使用，既然这样，咱们也得会点，于是乎就开始自学了，通过找资料，终于做出来了一个简单案例，这里分享供大家浏览，主要分为以下几个步骤：
一、springmvc是一个mvc框架,通过mvc很好的将数据、业务、表现进行分离
二、springmvc是围绕DispatcherServlet展开的，由DispatcherServlet负责将请求派发到特定的handler
springmvc框架搭建步骤：
1.创建项目，拷贝springmvc相关的jar包。
2.配置web.xml主要配置前端控制器DispatcherServlet
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>3.在web-inf下创建springmvc配置文件，[servletname]-servlet.xml,文件名必须是springmvc-servlet.xml
4.配置HandlerMapping映射，根据beanname找到对应的Controller（可以省略）
<bean class="org.springframework.web.servlet.mvc.support.ControllerBeanNameHandlerMapping">5.创建jsp页面，需要请求发出请求的页面
6.创建Controller,继承AbstractController，重写handleRequestInternal(HttpServletRequest request,
HttpServletResponse response)
//返回数据和页面
@Override
protected ModelAndView handleRequestInternal(HttpServletRequest request,
HttpServletResponse response) throws Exception {
String hello = request.getParameter("file");
System.out.println(hello);
ModelAndView modelAndView = new ModelAndView("welcome"); //返回到的页面
modelAndView.addObject("helloword",hello); //返回值
return modelAndView;
} 7.配置视图解析器
<!-- 配置视图解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!-- 配置前缀和后缀 -->
<property name="prefix" value="/"></property>
<!-- 后缀 -->
<property name="suffix" value=".jsp"></property>
</bean>下面我把源码放上来吧；
web.xml里面的配置：
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0"
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_3_0.xsd">
<display-name></display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<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/pringMVC-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
</web-app>
Springmvc里面的配置：
<?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:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">
<!-- 配置HandlerMapping映射，根据beanname找到对应的Controller -->
<bean class="org.springframework.web.servlet.mvc.support.ControllerBeanNameHandlerMapping"></bean>
<!-- 配置Controller -->
<bean id="hello.do" class="org.controller.HelloController"></bean>
<!-- 配置视图解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!-- 配置前缀和后缀 -->
<property name="prefix" value="/"></property>
<!-- 后缀 -->
<property name="suffix" value=".jsp"></property>
</bean>
</beans>
HelloController控制器里面的代码：
/**
* @Title: HelloController.java
* @Package org.controller
* @Description: TODO该方法的主要作用：
* @author A18ccms A18ccms_gmail_com
* @date 2017-8-30 下午8:38:53
* @version V1.0
*/
package org.controller;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.AbstractController;
/**
*
* 项目名称：springmvc_day1
* 类名称：HelloController
* 类描述： 控制器
* 创建人：Mu Xiongxiong
* 创建时间：2017-8-30 下午8:38:54
* 修改人：Mu Xiongxiong
* 修改时间：2017-8-30 下午8:38:54
* 修改备注：
* @version
*
*/
public class HelloController extends AbstractController {
@Override
protected ModelAndView handleRequestInternal(HttpServletRequest request,
HttpServletResponse response) throws Exception {
String hello = request.getParameter("file");
System.out.println(hello);
ModelAndView modelAndView = new ModelAndView("/welcome"); //返回到的页面
modelAndView.addObject("helloword",hello); //返回值
return modelAndView;
}
}
index.jsp里面的代码：
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<form action="hello.do" method="post">
hello:<input type="text" name="file"/><br/>
<input type="submit" value="提交"/>
</form>
</body>
</html>
welcome.jsp的代码：
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
hello:${helloword }
</body>
</html>
最后看一下目录对应关系：
运行看welcome.jsp页面：
运行完毕，遇到的问题：
Springmvc中提交from之后不跳转不进控制器
Could not open ServletContext resource [/WEB-INF/springmvc-servlet.xml]【解决方案】
