spring mvc hello

1.配置web.xml文件

  

   

    

     

    
    

     

      <?xml version="1.0" encoding="UTF-8"?>
     
    
   

    

     

    
    

     

      <web-app version="2.5" 
     
    
   

    

     

    
    

     
	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_2_5.xsd">
     
    
   

    

     

    
    

     
  <welcome-file-list>
     
    
   

    

     

    
    

     
    <welcome-file>index.jsp</welcome-file>
     
    
   

    

     

    
    

     
  </welcome-file-list>
     
    
   

    

     

    
    

     
  <servlet>
     
    
   

    

     

    
    

     
  	<servlet-name>hello</servlet-name>
     
    
   

    

     

    
    

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

    

     

    
    

     
  	<load-on-startup>1</load-on-startup>
     
    
   

    

     

    
    

     
  	<init-param>
     
    
   

    

     

    
    

     
  		<param-name>contextConfigLocation</param-name>
     
    
   

    

     

    
    

     
  		<param-value>classpath:spring-servlet-config.xml</param-value>
     
    
   

    

     

    
    

     
  	</init-param>
     
    
   

    

     

    
    

     
  </servlet>
     
    
   

    

     

    
    

     
  <servlet-mapping>
     
    
   

    

     

    
    

     
  	<servlet-name>hello</servlet-name>
     
    
   

    

     

    
    

     
  	<url-pattern>/</url-pattern>
     
    
   

    

     

    
    

     
  </servlet-mapping>
     
    
   

    

     

    
    

     

      </web-app>
     
    
  
 

2.配置spring-servlet-config.xml

  

   

    

     

    
    

     

      <?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"
     
    
   

    

     

    
    

     
	xsi:schemaLocation="http://www.springframework.org/schema/beans 
     
    
   

    

     

    
    

     

       http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
	<!-- 在spring中配置HandlerMapping、HandlerAdapter -->
     
    
   

    

     

    
    

     
	<bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"></bean>
     
    
   

    

     

    
    

     
	<bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"></bean>
     
    
   

    

     

    
    

     
	<!-- ViewResolver -->
     
    
   

    

     

    
    

     
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
     
    
   

    

     

    
    

     
		<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"></property>
     
    
   

    

     

    
    

     
		<property name="prefix" value="/"></property>
     
    
   

    

     

    
    

     
		<property name="suffix" value=".jsp"></property>
     
    
   

    

     

    
    

     
	</bean>
     
    
   

    

     

    
    

     
	<bean name="/hello" class="com.controller.HelloController"></bean>
     
    
   

    

     

    
    

     

      </beans>
     
    
  
 

3.控制器代码;

  

   

    

     

    
    

     

      package com.controller;
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      import javax.servlet.http.HttpServletRequest;
     
    
   

    

     

    
    

     

      import javax.servlet.http.HttpServletResponse;
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      import org.springframework.web.servlet.ModelAndView;
     
    
   

    

     

    
    

     

      import org.springframework.web.servlet.mvc.Controller;
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      public class HelloController implements Controller {
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
	public ModelAndView handleRequest(HttpServletRequest arg0,
     
    
   

    

     

    
    

     

       HttpServletResponse arg1) throws Exception {
     
    
   

    

     

    
    

     
		//1.收集参数，验证参数；
     
    
   

    

     

    
    

     
		//2.绑定参数到命令对象；
     
    
   

    

     

    
    

     
		//3.将命令对象传入业务对象，进行业务处理；
     
    
   

    

     

    
    

     
		//4.选择下一个页面;
     
    
   

    

     

    
    

     

      		ModelAndView mv=new ModelAndView();
     
    
   

    

     

    
    

     
		//添加模型和数据可以是任意的POJO对象;
     
    
   

    

     

    
    

     

      		mv.addObject("message","hello world"); //这是数据，相当于model
     
    
   

    

     

    
    

     
		//设置逻辑视图名，视图解析器会根据名字，将之解析到具体的视图页面;//设置view
     
    
   

    

     

    
    

     

      		mv.setViewName("hello");
     
    
   

    

     

    
    

     
		return mv;
     
    
   

    

     

    
    

     

      	}
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      }
     
    
  
 

4.前端页面

  

   

    

     

    
    

     

      <%@ 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>
     
    
   

    

     

    
    

     
    <!-- 这是创建的hello.jsp页面 ;message:相当于我们的设置属性-->
     
    
   

    

     

    
    

     

          ${message }
     
    
   

    

     

    
    

     
  </body>
     
    
   

    

     

    
    

     

      </html>
     
    
  
 

使用注解的话，

SpringMVC 的注解和 XML 冲突的问题

There is already handler of type [class com.sdemo.controller.Login] mapped.原因在于spring配置文件中和控制器注解都定义过了。

<bean name="/hello" class="com.controller.HelloController"></bean>

@Controller
public class HelloController {

文章来源: aaaedu.blog.csdn.net，作者：tea_year，版权归原作者所有，如需转载，请联系作者。

原文链接：aaaedu.blog.csdn.net/article/details/69062751