SpringMVC+Spring+mybatis project construction detailed process

创建maven-web项目，为了方便的管理jar包。首先在maven中导入所需的包。在pom.xml中加入以下代码：<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中添加如下代码：
<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>
Some configurations need to be changed to their own configuration, such as database account password and so on.
Then configure the web.xml file and configure it as follows:
<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>
    <!


    <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> Then add the configuration file of mybatis. The configuration of mybatis-config.xml is as follows:
    </servlet-mapping>

  
    <typeAliases>  
        <typeAlias ​​alias="User" type="com.mkyong.common.entity.User"/>  
    </typeAliases>  
    <mappers>  
        <mapper resource="User.xml" />
           
    </mappers> 
configuration is configuration Well, then write mapper.xml and service layer and controller layer.
The UserMapper.java file is as follows:
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 layer interface and implementation class:
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层：
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>
A project is built, there is no extra stuff, only the most Simple application of mybatis and spring. The source code of the project is in the attachment.