24、(知识篇)SpringMVC01(SpringMVC HelloWorld)

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/**

* SpringMVC HelloWorld

* 1、在web.xml中配置dispatcherservlet(如果eclipse中配置了spring插件可以用alt+/进行快速配置)

* 2、在spring-mvc.xml中配置InternalResourceViewResolver的bean

* 配置前序和后续

* ============================================================

* 3、使用requestmapping配置路径

* 格式为 prefix+requestmapping返回的路径+suffix

* 其中requestmapping可以修饰在类上面

* 4、使用method指定请求方式:get、post、put、delete

* 5、指定params 则必须带有指定参数,并且必须满足参数条件,才能访问函数,不满足则报404,可以指定简单表达式

* 6、指定headers,与指定params一样,必须满足表达式才能访问方法,不满足则报404

* ============================================================

* 7、配置ant方式访问 参考sayhello2方法

requestmapping中配置

* /*/方法名 则访问时,可以用任意字符 访问例如:http://127.0.0.1:8080/24SpringMVC01/Test/asdfasdf/sayHello2

* /**/方法名  如果两个*号,代表任意路径

* 8、@PathVariable 参考sayHello3方法

* /sayHello3/{xxx} 然后使用注解@PathVariable(value="xxx")  类型 参数名

  例如:http://127.0.0.1:8080/24SpringMVC01/Test/sayHello3/1/2

* @return

*/


测试类:

package com.spring.test;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.PathVariable;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;@Controller@RequestMapping("Test")public class Test {/** * SpringMVC HelloWorld *  * 1、在web.xml中配置dispatcherservlet(如果eclipse中配置了spring插件可以用alt+/进行快速配置) * 2、在spring-mvc.xml中配置InternalResourceViewResolver的bean * 配置前序和后续 * ============================================================ * 3、使用requestmapping配置路径 * 格式为 prefix+requestmapping返回的路径+suffix * 其中requestmapping可以修饰在类上面 *  * 4、使用method指定请求方式:get、post、put、delete * 5、指定params 则必须带有指定参数,并且必须满足参数条件,才能访问函数,不满足则报404,可以指定简单表达式 * 6、指定headers,与指定params一样,必须满足表达式才能访问方法,不满足则报404 * ============================================================ *  * 7、配置ant方式访问 参考sayhello2方法 *  在requestmapping中配置 * /*/方法名 则访问时,可以用任意字符 访问例如:http://127.0.0.1:8080/24SpringMVC01/Test/asdfasdf/sayHello2 * /**/方法名  如果两个*号,代表任意路径 *  * 8、@PathVariable 参考sayHello3方法 * /sayHello3/{xxx} 然后使用注解 @PathVariable(value="xxx")  类型 参数名 *    例如:http://127.0.0.1:8080/24SpringMVC01/Test/sayHello3/1/2 *  * @return */@RequestMapping(value="sayHello",method=RequestMethod.GET,params={"name","age","sex!=0"},headers={"Cache-Control=max-age=0"})public String sayHello(){System.out.println("Hello...");return "index";}@RequestMapping("/*/sayHello2")public String sayHello2(){System.out.println("sayHello2...");return "index";}@RequestMapping("/sayHello3/{page}/{currentpage}")public String sayHello3(@PathVariable(value="page") int page,@PathVariable(value="currentpage") int currentpage){System.out.println("page == "+page+" currentpage == "+currentpage);return "index";}}

springmvc.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:context="http://www.springframework.org/schema/context"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd"><context:component-scan base-package="com.spring.test"></context:component-scan><bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="prefix" value="/WEB-INF/views/"></property><property name="suffix" value=".jsp"></property></bean></beans>

web.xml

<?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>24SpringMVC01</display-name>    <!-- The front controller of this Spring Web application, responsible for handling all application requests --><servlet><servlet-name>springDispatcherServlet</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:spring-mvc.xml</param-value></init-param><load-on-startup>1</load-on-startup></servlet><!-- Map all requests to the DispatcherServlet for handling --><servlet-mapping><servlet-name>springDispatcherServlet</servlet-name><url-pattern>/</url-pattern></servlet-mapping></web-app>

web-inf/views/index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"    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" "http://www.w3.org/TR/html4/loose.dtd"><html><head><base href="<%=basePath %>"><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title></head><body>Hello Spring!</body></html>


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