Spring Boot中引入mybatis

1、mybatis整合

生成数据库表对应的Dao、Model、Mapping文件；mybatis配置信息，包括扫描包、JDBC属性、数据源等。
1.1、 生成ORMapping文件
UserInfoMapper

package com.test.demo.mybatis.dao;

import com.test.demo.mybatis.entity.UserInfo;

public interface UserInfoMapper {
	UserInfo selectByUsername(String username);
}

UserInfo

package com.test.demo.mybatis.entity;

public class UserInfo {
	private Long id;
	private String username;
	private String name;
	private String password;
	private String salt;
	private String state;

	get...
	set...
}

UserInfoMapper.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.test.demo.mybatis.dao.UserInfoMapper">
	<resultMap id="BaseResultMap" type="com.test.demo.mybatis.entity.UserInfo">
		<id column="ID" jdbcType="DECIMAL" property="id" />
		<result column="USERNAME" jdbcType="VARCHAR" property="username" />
		<result column="NAME" jdbcType="VARCHAR" property="name" />
		<result column="PASSWORD" jdbcType="VARCHAR" property="password" />
		<result column="SALT" jdbcType="VARCHAR" property="salt" />
		<result column="STATE" jdbcType="VARCHAR" property="state" />
	</resultMap>
	<sql id="Base_Column_List">
		ID, USERNAME, NAME, PASSWORD, SALT, STATE
	</sql>
	<select id="selectByPrimaryKey" parameterType="java.lang.Long"
		resultMap="BaseResultMap">
		select
		<include refid="Base_Column_List" />
		from ORCL.USER_INFO
		where ID = #{id,jdbcType=DECIMAL}
	</select>
	<select id="selectByUsername" parameterType="java.lang.String"
		resultMap="BaseResultMap">
		select
		<include refid="Base_Column_List" />
		from ORCL.USER_INFO
		where username = #{id,jdbcType=VARCHAR}
	</select>

</mapper>

1.2、 mybatis配置
pom.xml

		<dependency>
			<groupId>org.mybatis.spring.boot</groupId>
			<artifactId>mybatis-spring-boot-starter</artifactId>
			<version>1.1.1</version>
		</dependency>
		<dependency>
			<!-- created by mvn install command -->
			<groupId>com.oracle</groupId>
			<artifactId>ojdbc7</artifactId>
			<version>12.1.0</version>
		</dependency>

application.properties

mybatis.mapper-locations=classpath*:com/test/demo/mybatis/mapper/*.xml

spring.datasource.driverClassName=oracle.jdbc.driver.OracleDriver
spring.datasource.url=jdbc:oracle:thin:@10.xx.xx.37:1521:xe
spring.datasource.username=orcle1
spring.datasource.password=orcle1

DemoApplication

@SpringBootApplication
// 在启动类中添加对mapper包扫描@MapperScan
@MapperScan({"com.test.demo.mybatis.dao"})
public class DemoApplication {
	public static void main(String[] args) {
		SpringApplication.run(DemoApplication.class, args);
	}
}

新增mybatis-config.xml

<configuration>
	<typeAliases>
		<typeAlias alias="Integer" type="java.lang.Integer" />
		<typeAlias alias="Long" type="java.lang.Long" />
		<typeAlias alias="HashMap" type="java.util.HashMap" />
		<typeAlias alias="LinkedHashMap" type="java.util.LinkedHashMap" />
		<typeAlias alias="ArrayList" type="java.util.ArrayList" />
		<typeAlias alias="LinkedList" type="java.util.LinkedList" />
	</typeAliases>
</configurati

2、业务模拟

2.1、 controller
在HelloController中增加方法。

	@Resource
	UserInfoService service;
	
	@RequestMapping("/getUserByName")
	public UserInfo getDmCxbb(UserInfo key) {
		return this.service.findByUsername(key.getUsername());
	}

2.2、 Service层
UserInfoService接口

package com.test.demo.mybatis.service;
import com.test.demo.mybatis.entity.UserInfo;
public interface UserInfoService {
	/** 通过username查找用户信息 */
	public UserInfo findByUsername(String username);
}

UserInfoServiceImpl实现类

@Service
public class UserInfoServiceImpl implements UserInfoService {
	@Resource
	UserInfoMapper userDao;

	@Override
	public UserInfo findByUsername(String username) {
		return userDao.selectByUsername(username);
	}
}

3、运行

启动DemoApplication后，在浏览器中访问如下地址：
http: //cos6743:8081/getUserByName?username=yangtom
返回json：
{“id”:802,“username”:“yangtom”,“name”:“10001”,“password”:“1111153885f51222d0b”,“salt”:null,“state”:null}