spring boot配置MySQL数据库连接、Hikari连接池和Mybatis的简单配置方法

<!-- Begin of DB related --> 
 <dependency> 
  <groupId>org.mybatis.spring.boot</groupId> 
  <artifactId>mybatis-spring-boot-starter</artifactId> 
  <version>1.1.1</version> 
  <exclusions> 
   <exclusion> 
    <groupId>org.apache.tomcat</groupId> 
    <artifactId>tomcat-jdbc</artifactId> 
   </exclusion> 
  </exclusions> 
 </dependency> 
 <dependency> 
  <groupId>com.zaxxer</groupId> 
  <artifactId>HikariCP</artifactId> 
 </dependency> 
 <dependency> 
  <groupId>mysql</groupId> 
  <artifactId>mysql-connector-java</artifactId> 
 </dependency> 
<!-- End of DB related --> 

spring: 
 profiles: 
 active: dev 
 datasource: 
 driver-class-name: com.mysql.jdbc.Driver 
 username: root 
 password: 123456 
 hikari: 
  maxLifetime: 1765000 #一个连接的生命时长（毫秒），超时而且没被使用则被释放（retired），缺省:30分钟，建议设置比数据库超时时长少30秒以上 
  maximumPoolSize: 15 #连接池中允许的最大连接数。缺省值：10；推荐的公式：((core_count * 2) + effective_spindle_count) 
mybatis: 
 mapperLocations: classpath:mapper/*.xml 
--- 
# 开发环境配置 
spring: 
 profiles: dev 
 datasource: 
 url: jdbc:mysql://localhost:3306/ 
--- 
# 测试环境配置 
spring: 
 profiles: test 
 datasource: 
 url: jdbc:mysql://192.168.0.12:3306/ 
--- 
# 生产环境配置 
spring: 
 profiles: prod 
 datasource: 
 url: jdbc:mysql://192.168.0.13:3306/ 

package com.xjj.dao; 
import org.apache.ibatis.annotations.Mapper; 
import org.apache.ibatis.annotations.Select; 
import com.xjj.entity.Person; 
@Mapper 
public interface PersonDAO { 
 @Select("SELECT id, first_name AS firstName, last_name AS lastName, birth_date AS birthDate, sex, phone_no AS phoneNo" 
   + " FROM test.t_person WHERE id=#{0};") 
 public Person getPersonById(int id); 
 public int insertPerson(Person person); 
 public int updatePersonById(Person person); 
 public int updatePersonByPhoneNo(Person person); 
} 

<?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.xjj.dao.PersonDAO"> 
 <!-- 插入数据库用户表 --> 
 <insert id="insertPerson"> 
  INSERT INTO test.t_person(first_name,last_name,birth_date,sex,phone_no,update_dt) 
  VALUES(#{firstName},#{lastName},#{birthDate},#{sex},#{phoneNo},NOW()) 
 </insert> 
 <update id="updatePersonById"> 
  UPDATE test.t_person SET 
   first_name=#{firstName}, last_name=#{lastName}, birth_date=#{birthDate}, sex=#{sex}, phone_no=#{phoneNo} 
  WHERE id=#{id} 
 </update> 
 <update id="updatePersonByPhoneNo"> 
  UPDATE test.t_person SET 
   first_name=#{firstName}, last_name=#{lastName}, birth_date=#{birthDate}, sex=#{sex} 
  WHERE phone_no=#{phoneNo} 
 </update> 
</mapper> 

@Test 
public void dbTest() throws JsonProcessingException{ 
 Person person2 = personDAO.getPersonById(2); 
 logger.info("person no 2 is: {}", objectMapper.writeValueAsString(person2)); 
 person2.setFirstName("八"); 
 personDAO.updatePersonById(person2); 
 person2 = personDAO.getPersonById(2); 
 logger.info("person no 2 after update is: {}", objectMapper.writeValueAsString(person2)); 
 assertThat(person2.getFirstName(), equalTo("八")); 
}