详解SpringMVC和MyBatis框架开发环境搭建和简单实用

1、下载SpringMVC框架架包，下载地址：

点击下载

点击打开地址如图所示，点击下载即可
 

然后把相关的jar复制到lib下导入

2、MyBatis（3.4.2）下载

点击下载

MyBatis中文文档地址

点击查看

下载解压之后把jar复制到lib下导入，大概是这样子的

3、jdbc连接库还没有下载。。。这个是5.1.41版本的。。。

点击下载

解压之后这样子。。。

4、fastjson 阿里巴巴的json解析库

点击下载

版本是1.2.24 这个是托管到了github上面的，地址是：点击进入

5、创建WebProject

注意下一步有个选项，如果不勾选，默认是不会生成web.xml的

6、项目创建完毕，把之前的包都弄进来。。

web.xml

<?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>CoolWeb</display-name>
 <welcome-file-list>
  <welcome-file>index.html</welcome-file>
  <welcome-file>index.htm</welcome-file>
  <welcome-file>index.jsp</welcome-file>
  <welcome-file>default.html</welcome-file>
  <welcome-file>default.htm</welcome-file>
  <welcome-file>default.jsp</welcome-file>
 </welcome-file-list>


 <servlet>
   <servlet-name>CoolWeb</servlet-name>
   <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
   <init-param>
      <param-name>contextConfigLocation</param-name>
      <!-- <param-value>classpath:application-context.xml</param-value> -->
      <param-value>classpath:CoolWeb-servlet.xml</param-value> 
   </init-param><!-- classpath：只会到你的class路径中查找找文件; 
      classpath*：不仅包含class路径，还包括jar文件中(class路径)进行查找. -->
   <load-on-startup>1</load-on-startup>
 </servlet>

  <!-- 如果不配置servlet-mapping服务器就无法响应/请求 -->
 <servlet-mapping>
    <servlet-name>CoolWeb</servlet-name>
    <url-pattern>/</url-pattern>
 </servlet-mapping>

</web-app>

7、在src下创建CoolWeb-servlet.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/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
    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">


  <!-- 开启SpringMVC注解 -->
  <context:component-scan base-package="com.vincent.lwx"/>
  <mvc:annotation-driven/>


</beans>

8、在src下编写ApplicationContext.xml文件

<?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/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
    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">


  <context:component-scan base-package="com.vincent.lwx"/>
  <mvc:annotation-driven/>

  <!-- User实体类 -->
  <bean id="user" class="com.vincent.lwx.bean.User"/>

   <!-- 支持上传文件 --> 
  <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    <property name="defaultEncoding" value="UTF-8"/>
    <!-- max size:10M -->
    <property name="maxUploadSize" value="10485760"/>  
  </bean> 

</beans>

User实体类要在这里注册

9、在src下编写mybatis.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
  <environments default="development">
    <environment id="development">
      <transactionManager type="JDBC" />
      <!-- 配置数据库连接信息 -->
      <dataSource type="POOLED">
        <property name="driver" value="com.mysql.jdbc.Driver" />
        <!-- 注意3306后面是数据库名称 autoReconnect自动重连-->
        <property name="url" value="jdbc:mysql://localhost:3306/cool?useUnicode=true&characterEncoding=utf-8&useSSL=false&autoReconnect=true" />
        <property name="username" value="root" />
        <property name="password" value="root" />
      </dataSource