第一步：导入jar包

jar包链接：https://pan.baidu.com/s/1yKAjRRYHCtgtjxo0Zss4lQ

第二步：创建两个Source Folder文件夹（ resources和test）

第三步：创建实体类

第四步：创建dao层接口、实现类、mapper映射文件

1、Dao接口：

package com.bdqn.dao.user;

import java.util.List;

import com.bdqn.pojo.User;

public interface UserMapper {

	/**
	 * 按照用户名和用户角色查找用户列表
	 * @param user
	 * @return
	 */
	List<User> getUsers(User user);
}

2、Dao的实现类：

package com.bdqn.dao.user;

import java.util.List;
import org.mybatis.spring.SqlSessionTemplate;
import com.bdqn.pojo.User;

public class UserMapperImpl implements UserMapper {
	private SqlSessionTemplate sqlSession;

	@Override
	public List<User> getUsers(User user) {
		return sqlSession.selectList("com.bdqn.dao.user.UserMapper.getUserList",user);
	}

	public SqlSessionTemplate getSqlSession() {
		return sqlSession;
	}

	public void setSqlSession(SqlSessionTemplate sqlSession) {
		this.sqlSession = sqlSession;
	}

}

3、UserMapper文件：

<!DOCTYPE mapper
    PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
    "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.bdqn.dao.user.UserMapper">
	<select id="getUserList" resultType="User" parameterType="User">
		SELECT * FROM `smbms_user` 
		<where>
			<if test="userName!=null and userName!='' ">
				and userName LIKE CONCAT('%',#{userName},'%') 
			</if>
			<if test="userRole!=null">
			 	AND `userRole` =#{userRole}
			</if>
		</where> 
	</select>
</mapper>

第五步：创建service层接口、实现类

Service接口

package com.bdqn.service;

import java.util.List;

import com.bdqn.pojo.User;

public interface UserService {

	List<User> findUserList(User user) throws Exception;
}

Service实现类

package com.bdqn.service;

import java.util.List;

import com.bdqn.dao.user.UserMapper;
import com.bdqn.pojo.User;

public class UserServiceImpl implements UserService {

	private UserMapper userMapper;

	@Override
	public List<User> findUserList(User user) throws Exception {
		try {
			return userMapper.getUsers(user);
		} catch (Exception e) {
			e.printStackTrace();
			throw e;
		}
	}

	public UserMapper getUserMapper() {
		return userMapper;
	}

	public void setUserMapper(UserMapper userMapper) {
		this.userMapper = userMapper;
	}

}

第六步：在resource文件夹中编写mybatis-config.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>
	<!-- 类型别名 -->
	<typeAliases>
		<package name="com.bdqn.pojo"/>
	</typeAliases>
</configuration>

第七步：在resource文件夹中编写applicationContext.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:aop="http://www.springframework.org/schema/aop"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
         http://www.springframework.org/schema/beans/spring-beans.xsd
         http://www.springframework.org/schema/aop
         http://www.springframework.org/schema/aop/spring-aop.xsd
         http://www.springframework.org/schema/tx
         http://www.springframework.org/schema/tx/spring-tx-3.2.xsd">
         <!-- 配置数据源 -->
         <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
         	<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
         	<property name="url" value="jdbc:mysql://127.0.0.1:3306/smbms?useUnicode=true&amp;characterEncoding=utf-8"/>
         	<property name="username" value="root"/>
         	<property name="password" value="root"/>
         </bean>
         <!-- 获得sqlSessionFactory -->
         <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
         	<!-- 映射数据源 -->
         	<property name="dataSource" ref="dataSource"/>
         	<!-- 映射mybatis核心配置文件 -->
         	<property name="configLocation" value="classpath:mybatis-config.xml"/>
         	<!-- 映射mapper文件 -->
         	<property name="mapperLocations">
         		<list>
         			<value>classpath:com/bdqn/dao/**/*.xml</value>
         		</list>
         	</property>
         </bean>
         <!-- 获得sqlSession -->
         <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
         	<constructor-arg name="sqlSessionFactory" ref="sqlSessionFactory"/>
         </bean>
         <bean id="UserMapper" class="com.bdqn.dao.user.UserMapperImpl">
         	<property name="sqlSession" ref="sqlSession"/>
         </bean>
         <bean id="UserService" class="com.bdqn.service.UserServiceImpl">
         	<property name="userMapper" ref="UserMapper"/>
         </bean>
</beans>

第八步：在test文件夹中编写测试方法

 演示案例：https://pan.baidu.com/s/1Cwq0JfKK1x_PdUSbyxZERQ