Spring mvc通過xml配置檔案方式實現簡單HelloWorld
阿新 • • 發佈：2019-02-14
實現Spring MVC有兩種不同的方式：基於XML配置檔案和基於註解。
這裡，我們使用XML檔案的方式來實現。
首先，我們需要在Eclipse或者是MyEclipse中新建一個web專案，並將Spring MVC所需的的jar包拷貝到lib目錄下，如下圖所示的jar包：
然後，需要在web.xml檔案中配置DispatcherServlet。它是Spring MVC的核心，所有的頁面請求都將經過它被分發到指定的Controller中去。
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1"> <display-name>springMVCHello</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> </servlet> <servlet-mapping> <servlet-name>springmvc</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping> </web-app>
新增springmvc-servlet,xml檔案，內容如下：
<?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" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"> <!-- 配置HandlerMapping 通過BeanName找到對應的Controller --> <bean class="org.springframework.web.servlet.mvc.support.ControllerBeanNameHandlerMapping"></bean> <!-- 配置Controller --> <bean name="/hello.do" class="com.xjc.controller.HelloController"></bean> <!-- 配置檢視解析器 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <!-- 字首 --> <property name="prefix" value="/"></property> <!-- 字尾 --> <property name="suffix" value=".jsp"></property> </bean> </beans>
編寫HelloController類（繼承AbstractController類），內容如下：
package com.xjc.controller; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.web.servlet.ModelAndView; import org.springframework.web.servlet.mvc.AbstractController; public class HelloController extends AbstractController{ @Override protected ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response) throws Exception { String hello = request.getParameter("hello"); System.out.println("-------- : "+hello); ModelAndView mav = new ModelAndView("index"); mav.addObject("helloworld"," hello "+ hello); return mav; } }
編寫hello.jsp頁面：
<%@ page language="java" import="java.util.*" contentType="text/html;charset=utf-8"%>
<html>
<head><title></title></head>
<body>
<form action="hello.do" method="post">
hello:<input type="text" name="hello">
<input type="submit" value="提交">
</form>
</body>
</html>
編寫index.jsp頁面（返回結果的頁面）：
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head><title></title></head>
<body>
<h1>${helloworld }</h1>
</body>
</html>執行效果：
