IntelliJ IDEA spring mvc +mybatis 环境搭建服务器(上)

图片贴不过来，可以看我的简书（http://www.jianshu.com/users/c717eefe3f42/latest_articles）

所需软件

Intellij IDEA Ultimate （一定要这个版滴,不过需要收费，别问我为什么，说多了都是泪，半夜没睡找不到tomcat部署项目，建议用最新版）
Tomcat （下下来，解压即可使用，测试方式进入tomcat解压包的bin目录startup.bat，打开即可）
JDK 我使用的是1.8
MySql 5.6
Maven （可使用Intellij IDEA自带的）

正式开搭

第一步， Creat New Project

1.png

-第二步，创建Maven项目（如图），然后Next

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第三步， 几个必填，可以理解为项目唯一标识符（Maven项有很多项目）

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第4步 next （伙伴们自己填一下，点击finish就创好了）

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开始初始化配置

先说Maven的项目依赖配置文件pom.xml，我们进入mvn repository 查找需要搜索的包结果如图：

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点击进入第一个搜索结果，然后各种版本

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点击所需版本。如图：

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里面的dependency即为所需标签。

总的配置文件如下，许多暂时用不上：

<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/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion>
<groupId>com.nothing</groupId>
<artifactId>hellospringmvc</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>hellospringmvc Maven Webapp</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.7.2</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.2</version>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>

<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jpa</artifactId>
<version>1.9.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.hibernate.javax.persistence</groupId>
<artifactId>hibernate-jpa-2.0-api</artifactId>
<version>1.0.1.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>5.1.0.Final</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.38</version>
</dependency>
<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
<version>20160212</version>
</dependency>
</dependencies>
<build>
<finalName>hellospringmvc</finalName>
</build>
</project>

web.xml (web项目都会配置这个，就像android的manifest一样) 先贴出来。

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1">

<display-name>hellodemo</display-name>
<servlet>
<servlet-name>myspring</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
<servlet-name>myspring</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>

</web-app>

下面一句使用spring框架的默认DispatcherSerlet。<load-on-starup> 该servlet的启用时间。<servlet-name>myspring</servlet-name>指定了serevlet配置文件myspring。url -pattern是指所有路径均会被该servlet拦截。

<servlet>
<servlet-name>myspring</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
<servlet-name>myspring</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>

而filter一句是防止中文乱码，启用uft-8。
配置Servlet myspring-serlet.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"
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.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> 
<!--指明 controller 所在包，并扫描其中的注解-->
<context:component-scan base-package="com.nothing.controller"/>

<!-- 静态资源(js、image等)的访问 -->
<mvc:default-servlet-handler/>

<!-- 开启注解 -->
<mvc:annotation-driven/>

<!--ViewResolver 视图解析器-->
<!--用于支持Servlet、JSP视图解析-->
<bean id="jspViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>

新建java类

@Controller
public class MainController {
@RequestMapping(value = "/hello", method = RequestMethod.GET)
public String index() {
return "index";
}
@RequestMapping(value="nice",method = RequestMethod.GET)
public  String nice(Model model){
model.addAttribute("result","hahaha 第一个参数");
return "nice";
}
}

灰常简单的nice.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>nice to meet you!</title>
</head>
<body>
<br/>
<div>
${result}
</div>

</body>
</html>

最后整个工程如图：

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将项目部署到tomcat，运行即可得到如图：