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springmvc的helloworld(1)

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程序说明:

在url中访问控制器,在控制器中跳转到jsp页面,完成springmvc控制过程。

第一步:

配置xml

<servlet>
		<servlet-name>spring</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
</servlet>

<servlet-mapping>
	<servlet-name>spring</servlet-name>
	<url-pattern>*.do</url-pattern>
</servlet-mapping>

 说明:<servlet-name>中的spring指在web-inf目录下有spring-servlet.xml文件。

第二步:

在web-inf目录下新建spring-servlet.xml文件

<?xml version="1.0" encoding="UTF-8"?>  
<beans xmlns="http://www.springframework.org/schema/beans"  
    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
    xmlns:context="http://www.springframework.org/schema/context"  
    xsi:schemaLocation="  
        http://www.springframework.org/schema/beans  
        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd  
        http://www.springframework.org/schema/mvc  
        http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd  
        http://www.springframework.org/schema/context    
        http://www.springframework.org/schema/context/spring-context-3.0.xsd">  
  	<!-- 加载DefaultAnnotationHandlerMapping和 AnnotationMethodHandlerAdapter-->
  	<mvc:annotation-driven />  	
    <!-- 注释资源扫描包路径 -->  
    <context:component-scan base-package="com.action" />  
    <!-- 对模型视图名称的解析,即在模型视图名称添加前后缀,在requestmapping输入的地址后自动调用该类进行视图解析 -->  
    <bean id="viewResolver"  
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">  
        <property name="viewClass"  
            value="org.springframework.web.servlet.view.JstlView" />  
            <!-- 为return的值加上前缀 -->
	<!-- <property name="prefix" value="/WEB-INF/jsp/" /> -->
	<!-- 为return的值加上后缀 -->
        <property name="suffix" value=".jsp"></property>  
    </bean>
 
</beans>  

 第三步:

创建action类,HelloworldAction:

package com.action;

import java.util.List;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;



@Controller
public class HelloworldAction {
	@RequestMapping(value = "/helloworld.do")
	public String show(Model model) {
		model.addAttribute("helloworld", "helloworld");
		return "result";
	}
}

 第四步:

创建result.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>  
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'result.jsp' starting page</title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
	<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>
    ${helloworld } <br>
  </body>
</html>

 

 运行结果:

访问:http://localhost:8080/smvc/helloworld.do

结果:在jsp页面中显示 helloworld

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