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Spring MVC學習筆記之Hello World
3、配置web.xml文件，這裏直接貼完整的web.xml文件，裏麵會有一些注釋：
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance" xmlns="https://java.sun.com/xml/ns/javaee" xsi:schemaLocation="https://java.sun.com/xml/ns/javaee https://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
<display-name>Spring MVC</display-name>
<servlet>
<!-- 引入Spring MVC核心過濾器 -->
<servlet-name>springDispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- 初始化參數 -->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc.xml</param-value>
</init-param>
<!-- 啟動時加載 -->
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springDispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>springmvc.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="https://www.springframework.org/schema/beans" xmlns:aop="https://www.springframework.org/schema/aop"
xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="https://www.springframework.org/schema/mvc" xmlns:context="https://www.springframework.org/schema/context"
xsi:schemaLocation="
https://www.springframework.org/schema/aop
https://www.springframework.org/schema/aop/spring-aop-4.0.xsd
https://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans-4.0.xsd
https://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context-4.0.xsd
https://www.springframework.org/schema/mvc
https://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
<!-- 配置自動掃描注解的包 -->
<context:component-scan base-package="com.watimer.springmvc"></context:component-scan>
<!-- 配置視圖解析器 -->
<!--
視圖解析器的作用為：當請求成功時，跳轉到“視圖解析器前綴+返回值+視圖解析器後綴界麵”
以此項目為例，則跳轉到WEB-INF/views/success.jsp界麵
-->
<bean >
<property name="prefix" value="/WEB-INF/views/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>
5、在SRC下建包，注意與springmvc.xml中配置的要相同，這裏為com.watimer.springmvc,同時建立類Hello，貼代碼：
Hello.java
package com.watimer.springmvc;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
/**
* @author 易訊.嶽耀櫟
*/
//掃描Controller
@Controller
public class Hello {
//@RequestMapping對應的是請求路徑，會在下文中指出
@RequestMapping("/hello")
public String hello(){
System.out.println("hello world");
//請求成功後，根據上文配置的視圖解析器，會跳轉到success.jsp界麵
return "success";
}
}
index.jsp
<%@ 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>
<!-- 這裏的請求，對應的是@RequestMapping("/hello")，如果不一致，則請求不到-->
<a href="hello">helloworld</a>
</body>
</html>
7、請求界麵
8、點擊後的界麵
8、控製台的輸出
到此，第一個項目就完成了,項目源碼可供下載
最後更新：2017-08-13 22:25:42