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springmvc学习笔记(一) -- 从零搭建,基础入门

 1、新建maven项目

参考mybatis学习笔记(五) -- maven+spring+mybatis从零开始搭建整合详细过程(上)第一部分,修改配置

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2、修改pom.xml 文件

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">    <modelVersion>4.0.0</modelVersion>    <groupId>com.lmei.springmvc</groupId>    <artifactId>springmvc01</artifactId>    <version>0.0.1-SNAPSHOT</version>    <packaging>war</packaging>    <properties>        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>        <spring.version>4.3.0.RELEASE</spring.version>    </properties>    <dependencies>        <!-- 添加Spring-core包 -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-core</artifactId>            <version>4.1.4.RELEASE</version>        </dependency>        <!-- 添加spring-context包 -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-context</artifactId>            <version>4.1.4.RELEASE</version>        </dependency>        <!-- 添加spring-jdbc包 -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-jdbc</artifactId>            <version>4.1.4.RELEASE</version>        </dependency>        <!-- 添加spring-test包 -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-test</artifactId>            <version>4.1.4.RELEASE</version>        </dependency>        <!-- 添加spring-web包 -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-web</artifactId>            <version>4.1.4.RELEASE</version>        </dependency>        <!--添加spring-webmvc包 -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-webmvc</artifactId>            <version>4.1.4.RELEASE</version>        </dependency>        <!-- JSTL -->        <dependency>            <groupId>javax.servlet</groupId>            <artifactId>jstl</artifactId>            <version>1.2</version>        </dependency>    </dependencies></project>

在加载包的过程中,出现下载失败的情况,找到存放位置,将下载jar失败的文件夹删掉,重新保存pom.xml让其重新下载。

出现重复多次操作,依然下载失败的情况,网上找了一些解决方法,比如直接使用maven install还是失败,最后重新开了一个工作空间,在另外一个工作空间建了个新的maven项目,然后把加载失败的包的配置复制到那边的pom.xml,可以下载成功。然后原项目的pom.xml重新保存后,项目不再报错。所以如果遇到同样的情况,可以试下用这种方法。

 

3、新建包,创建一个controller类

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package com.lmei.springmvc01.controller;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.RequestMapping;//@Controller是为了让Spring IOC容器初始化时自动扫描到;//@RequestMapping是为了映射请求路径@Controller@RequestMapping("/Hello")public class HelloWorld {    @RequestMapping("/SayHello")    public String SayHi(Model model) {        model.addAttribute("message", "Hello Spring MVC!");        return "hello";  //返回视图    }}

 

4、在WEB-INFO下创建一个文件夾view,然后在里面创建一个jsp文件,命名为hello.jsp

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hello.jsp的代码如下:(webapp/WEB-INFO/view/hello.jsp)

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %><!DOCTYPE html><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Hello Spring MVC!</title></head><body>    <h2>${message}</h2></body></html>

index.jsp代码如下: (webapp/index.jsp)

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title></head><body>hello</body></html>

 

5、添加springmvc-servlet.xml文件

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<?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"    xmlns:mvc="http://www.springframework.org/schema/mvc"    xsi:schemaLocation="http://www.springframework.org/schema/beans          http://www.springframework.org/schema/beans/spring-beans.xsd        http://www.springframework.org/schema/context         http://www.springframework.org/schema/context/spring-context-4.3.xsd        http://www.springframework.org/schema/mvc         http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd">    <!-- 自动扫描包,实现支持注解的IOC -->    <context:component-scan base-package="com.lmei.springmvc01" />        <!-- spring mvc不处理静态资源 -->    <mvc:default-servlet-handler />    <!-- 支持mvc注解驱动 -->    <mvc:annotation-driven />    <!-- 视图解析器 -->    <bean        class="org.springframework.web.servlet.view.InternalResourceViewResolver"        id="internalResourceViewResolver">        <!-- 前缀 -->        <property name="prefix" value="/WEB-INF/view/" />        <!-- 后缀 -->        <property name="suffix" value=".jsp" />    </bean></beans>

 

6、修改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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" 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">  <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>    <init-param>      <param-name>contextConfigLocation</param-name>      <param-value>classpath*:springmvc-servlet.xml</param-value>    </init-param>    <load-on-startup>1</load-on-startup>  </servlet>  <servlet-mapping>    <servlet-name>springmvc</servlet-name>    <url-pattern>/</url-pattern>  </servlet-mapping></web-app>

 

7、测试

项目右键->Run As->Run On Server->Tomcat...

启动时间可能比较长,默认的“start-timeout=45”,修改下时间长度

工作空间下的 metadata/.plugins/org.eclipse.wst.server.core/servers.xml 文件,修改时间,比如改成450

start-timeout="450"

保存后,重新启动,成功运行,默认跳到index.jsp页面

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在浏览器输入:http://localhost:8888/springmvc01/Hello/SayHello

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springmvc学习笔记(一) -- 从零搭建,基础入门