創建maven-web項目，為了方便的管理jar包。首先在maven中導入所需的包。在pom.xml中加入以下代碼：<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.0.0</version>
</dependency>
<dependency>
<groupId>javax.persistence</groupId>
<artifactId>persistence-api</artifactId>
<version>1.0</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.18</version>
</dependency>
然后在spring的配置文件application.xml中添加如下代碼：
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/courseman?defaultFetchSize=25&useLocalSessionState=true&elideSetAutoCommit=true&useUsageAdvisor=false&useReadAheadInput=false&useUnbufferedInput=false&cacheServerConfiguration=true&autoReconnect=true&zeroDateTimeBehavior=convertToNull" />
<property name="username" value="root" />
<property name="password" value="mysql" />
</bean>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="configLocation" value="classpath:mybatis-config.xml" />
<property name="dataSource" ref="dataSource" />
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="sqlSessionFactory" ref="sqlSessionFactory" />
<property name="basePackage" value="com.mkyong.common.mapper"/>
</bean>
<bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate">
<constructor-arg index="0" ref="sqlSessionFactory" />
</bean>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix">
<value>/WEB-INF/pages/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
一些配置需要改成自己的配置，比如數據庫賬號密碼等。
然后再配web.xml文件，配置如下：
<display-name>Spring MVC Application</display-name>

<!-- RESTful filter -->
<filter>
<filter-name>HiddenHttpMethodFilter</filter-name>
<filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
</filter>

<filter-mapping>
<filter-name>HiddenHttpMethodFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- filter end -->

<!-- Handles all requests into the application -->
<servlet>
<servlet-name>Spring MVC Dispatcher Servlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet </servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>
classpath:applicationContext.xml
</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Spring MVC Dispatcher Servlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
再把mybatis的配置文件配上，mybatis-config.xml配置如下：

<typeAliases>
<typeAlias alias="User" type="com.mkyong.common.entity.User"/>
</typeAliases>
<mappers>
<mapper resource="User.xml" />

</mappers>
配置就配置好了，然后寫mapper.xml和service層和controller層。
UserMapper.java文件如下：
package com.mkyong.common.mapper;

import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;

import com.mkyong.common.entity.User;

public interface UserMapper {

public User getUserById(@Param("userId") int userId);
}


service層接口和實現類：
package com.mkyong.common.service.impl;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.mkyong.common.entity.User;
import com.mkyong.common.mapper.UserMapper;
import com.mkyong.common.service.HelloService;


@Service("HelloService")
public class HelloServiceImpl implements HelloService {

@Autowired
private UserMapper userMapper;

public User getUserById(int userId){
return userMapper.getUserById(userId);
}
}


package com.mkyong.common.service;

import com.mkyong.common.entity.User;


public interface HelloService {
public User getUserById(int userId);
}

controller層：
package com.mkyong.common.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import com.mkyong.common.entity.User;
import com.mkyong.common.service.HelloService;


@Controller
@RequestMapping("/aaaa")
public class HelloController {

@Autowired
HelloService helloService;

@RequestMapping(method = RequestMethod.GET)
public String printWelcome(ModelMap model) {
int userId = 1;
User user = helloService.getUserById(userId);
model.addAttribute("userName", user.getUsername());
model.addAttribute("userPaw", user.getPassword());
return "hello";

}
}


User.xml：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.mkyong.common.mapper.UserMapper">
<select id="getUserById" parameterType="int" resultType="User">
SELECT * FROM t_user WHERE id = #{userId}
</select>

</mapper>


Hello.jsp：
<html>
<body>
<h1>userName : ${userName}</h1>
<h1>userPaw : ${userPaw}</h1>
</body>
</html>
一個項目就搭建完了，沒有任何多余的東西，只包含了最簡單的mybatis和spring的應用。項目源碼在附件中。 超強干貨來襲 云風專訪：近40年碼齡，通宵達旦的技術人生

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