# 前言

今天手把手来教大家如何搭建基于 Maven 的 SpringMVC WEB 项目。

# 正文

# 开发环境介绍

IDE: MyEclipse 2017
jdk: 1.7
maven：apache-maven-3.1.1
好了，基本环境只要上面这些就行，maven 不需要安装，只要有解压包就行。

# MyEclipse 2014 中 Maven 的配置

打开 myeclipse 中的 Window=>Preferences=>Java=>Installed JREs
配置 jdk，这里我们选择 1.7

配置好 maven 路径，也就是你之前存放 maven 解压包的路径

指定 User Settings , 对应 settings.xml 以及本地仓库地址，我这边是建在盘，路径为 D:\maven\repo3.1.1 。

# 创建 WEB 项目

新建一个 web 项目

配置项目基本信息，项目名，java EE,java 版本，其中记得要勾上 Add maven support，这样才会生成带有 maven 的工程。

创建成功后出正确的项目结构应该是这样，如果不是下图中这样，src 下面没有以下这些包也没事，自己创建 src/main/java , src/main/resources , src/test/java , src/test/resources , 然后指定以下这些包为 source 就行。

# 配置需要的安装包

下面列出目前需要用到包，直接在 pom.xml 里面添加就行

	<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>SpringMVCMybatis</groupId>
	<artifactId>SpringMVCMybatis</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>war</packaging>
	<name>SpringMVCMybatis</name>
	<description/>
	<properties>
	<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
	<spring.version>4.1.1.RELEASE</spring.version>
	<cxf.version>2.7.15</cxf.version>
	<slf4j-version>1.7.12</slf4j-version>
	<log4j-version>1.2.17</log4j-version>
	<mybatis-version>3.3.0</mybatis-version>
	<mybatis-spring-version>1.2.3</mybatis-spring-version>
	</properties>
	<dependencies>
	<!-- 日志配置-->
	<dependency>
	<groupId>log4j</groupId>
	<artifactId>log4j</artifactId>
	<version>${log4j-version}</version>
	</dependency>
	<dependency>
	<groupId>org.slf4j</groupId>
	<artifactId>slf4j-log4j12</artifactId>
	<version>${slf4j-version}</version>
	</dependency>
	<dependency>
	<groupId>org.slf4j</groupId>
	<artifactId>slf4j-api</artifactId>
	<version>${slf4j-version}</version>
	</dependency>
	<dependency>
	<groupId>javax.servlet</groupId>
	<artifactId>javax.servlet-api</artifactId>
	<version>3.1.0</version>
	</dependency>
	<dependency>
	<groupId>org.apache.commons</groupId>
	<artifactId>commons-lang3</artifactId>
	<version>3.3</version>
	</dependency>
	<dependency>
	<groupId>com.alibaba</groupId>
	<artifactId>fastjson</artifactId>
	<version>1.2.1</version>
	</dependency>
	<!-- 数据源配置 -->
	<dependency>
	<groupId>com.mchange</groupId>
	<artifactId>c3p0</artifactId>
	<version>0.9.5.1</version>
	</dependency>
	<!--数据库相关, mysql, mybatis-->
	<dependency>
	<groupId>mysql</groupId>
	<artifactId>mysql-connector-java</artifactId>
	<version>5.1.37</version>
	</dependency>
	<dependency>
	<groupId>org.mybatis</groupId>
	<artifactId>mybatis-spring</artifactId>
	<version>${mybatis-spring-version}</version>
	</dependency>
	<dependency>
	<groupId>org.mybatis</groupId>
	<artifactId>mybatis</artifactId>
	<version>${mybatis-version}</version>
	</dependency>
	<dependency>
	<groupId>org.mybatis.generator</groupId>
	<artifactId>mybatis-generator-core</artifactId>
	<version>1.3.2</version>
	</dependency>
	<!-- spring用到的包 -->
	<dependency>
	<groupId>org.springframework</groupId>
	<artifactId>spring-web</artifactId>
	<version>${spring.version}</version>
	</dependency>
	<dependency>
	<groupId>org.springframework</groupId>
	<artifactId>spring-core</artifactId>
	<version>${spring.version}</version>
	</dependency>
	<dependency>
	<groupId>org.springframework</groupId>
	<artifactId>spring-context</artifactId>
	<version>4.1.1.RELEASE</version>
	</dependency>
	<dependency>
	<groupId>org.springframework</groupId>
	<artifactId>spring-beans</artifactId>
	<version>${spring.version}</version>
	</dependency>
	<dependency>
	<groupId>org.springframework</groupId>
	<artifactId>spring-jdbc</artifactId>
	<version>${spring.version}</version>
	</dependency>
	<dependency>
	<groupId>org.springframework</groupId>
	<artifactId>spring-webmvc</artifactId>
	<version>${spring.version}</version>
	</dependency>
	<dependency>
	<groupId>org.springframework</groupId>
	<artifactId>spring-tx</artifactId>
	<version>${spring.version}</version>
	</dependency>
	<!--测试-->
	<dependency>
	<groupId>junit</groupId>
	<artifactId>junit</artifactId>
	<version>4.11</version>
	<scope>test</scope>
	</dependency>
	<dependency>
	<groupId>org.springframework</groupId>
	<artifactId>spring-test</artifactId>
	<version>4.1.1.RELEASE</version>
	<scope>test</scope>
	</dependency>

	<dependency>
	<groupId>javax</groupId>
	<artifactId>javaee-api</artifactId>
	<version>7.0</version>
	<scope>provided</scope>
	</dependency>
	<dependency>
	<groupId>org.glassfish.web</groupId>
	<artifactId>javax.servlet.jsp.jstl</artifactId>
	<version>1.2.2</version>
	</dependency>
	</dependencies>
	<build>
	<plugins>
	<plugin>
	<artifactId>maven-compiler-plugin</artifactId>
	<version>2.3.2</version>
	<configuration>
	<source>1.7</source>
	<target>1.7</target>
	</configuration>
	</plugin>
	<plugin>
	<artifactId>maven-war-plugin</artifactId>
	<version>2.2</version>
	<configuration>
	<version>3.1</version>
	<failOnMissingWebXml>false</failOnMissingWebXml>
	</configuration>
	</plugin>
	</plugins>
	</build>
	</project>

# 配置 SpringMVC 需要的配置文件

web.xml 配置，注意里面配置 springMVC 需要用到的 DispatcherServlet ，指向的地址是 classpath:spring/applicationContext.xml ，当然此时还没创建这个 applicationCVontext.xml , 下一个步骤来创建

	<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
	http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

	<display-name>springmvctouchbaidu</display-name>
	<servlet>
	<servlet-name>springmvctouchbaidu</servlet-name>
	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
	<init-param>
	<param-name>contextConfigLocation</param-name>
	<param-value>classpath:spring/applicationContext.xml</param-value>
	</init-param>
	<load-on-startup>1</load-on-startup>
	</servlet>
	<servlet-mapping>
	<servlet-name>springmvctouchbaidu</servlet-name>
	<url-pattern>/</url-pattern>
	</servlet-mapping>
	<filter>
	<filter-name>encodingFilter</filter-name>
	<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
	<init-param>
	<param-name>encoding</param-name>
	<param-value>UTF-8</param-value>
	</init-param>
	<init-param>
	<param-name>forceEncoding</param-name>
	<param-value>true</param-value>
	</init-param>
	</filter>
	<filter-mapping>
	<filter-name>encodingFilter</filter-name>
	<url-pattern>/*</url-pattern>
	</filter-mapping>
	<session-config>
	<session-timeout>60</session-timeout>
	</session-config>
	</web-app>

在 src/main/resources 下面创建个 spring 目录用来存放 applicationContext.xml
后期会用的的配置很多，所以我一般会根据不同用途创建不同别名的 spring 配置文件，然后用 applicationContext.xml 统一起来。
这里我创建了 applicationContext.xml 以及 applicationContext-mvc.xml
applicationContext.xml 配置：

	<?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-3.0.xsd
	http://www.springframework.org/schema/context
	http://www.springframework.org/schema/context/spring-context-3.0.xsd
	http://www.springframework.org/schema/mvc
	http://www.springframework.org/schema/mvc/spring-mvc.xsd"
	default-lazy-init="true">
	<context:component-scan base-package="com.lxl.demo"/>
	<mvc:resources location="/WEB-INF/pages/" mapping="/pages/**"/>
	<!-- 视图解析器 -->
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
	<property name="prefix" value="/WEB-INF/pages/"/>
	<property name="suffix" value=".jsp"/>
	</bean>
	<!-- 默认的注解映射的支持 -->
	<mvc:annotation-driven>
	<mvc:message-converters register-defaults="true">
	<bean class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">
	<property name="supportedMediaTypes">
	<list>
	<value>text/plain;charset=utf-8</value>
	<value>application/json;charset=utf-8</value>
	<value>application/x-www-form-urlencoded</value>
	</list>
	</property>
	</bean>
	</mvc:message-converters>
	</mvc:annotation-driven>
	</beans>

其中一些重要的配置下篇文章详细的说明

context:component-scan 用来扫描指定的路径下的包，来加载组件用的
mvc:resources 指定静态资源路径

# 实现一个简单的 springMVC 请求

配置文件配置好了，我们就来测试一下，写一个 controller 来实现前后台交互
在 src/main/java 下面创建如下格式的文件夹。这是我习惯的写法。

common 用来存放公共的类
controller 控制层
service 层用来处理业务逻辑
dao 层用来处理数据库操作
dto 层用来存放 mybatis 根据表自动生成的实体对象

具体结构如下图：

在 controller包 下面创建一个类 SendToBaiduController

	package com.lxl.demo.controller;
	import org.springframework.stereotype.Controller;
	import org.springframework.web.bind.annotation.RequestMapping;
	import org.springframework.web.bind.annotation.RequestMethod;

	@Controller
	@RequestMapping(value="/sendBaidu")
	public class SendToBaiduController {
	@RequestMapping(value="/view",method = RequestMethod.GET)
	public String index(){
	System.out.println("进来了");
	return "index";
	}

	}

index.jsp 代码：

	<%@ 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">
	</head>
	<body>
	跳转进来，表示springMVC流程成功！
	</body>
	</html>