环境搭建
Spring Boot集成Mybatis
- （0）准备数据库创建user表
create database springboot_test;
create table person(
id int primary key auto_increment,
name varchar(20),
age int
)
public class Person {
private int id;
private String name;
private int age;
- （1） 添加启动器依赖；（自动添加 使用springboot init…勾选)
- （2）配置Mybatis：实体类别名包，日志，映射文件等；
spring:
datasource: # hikari
driver-class-name: com.mysql.cj.jdbc.Driver # mysql 8
username: root
password: 123456
url: jdbc:mysql://localhost:3306/springboot_test?useUnicode=true&characterEncoding=utf8&serverTimezone=GMT%2B8
mybatis:
type-aliases-package: com.wzx.demo04mybatis.domain #别名
mapper-locations: classpath:com.wzx.demo04mybatis.dao/*.xml #xml文件
#使用注解在启动类上面配置 @MapperScan("com.wzx.demo04mybatis.dao")//存放接口
configuration:
log-impl: org.apache.ibatis.logging.stdout.StdOutImpl #mybatis日志
@SpringBootApplication
@MapperScan("com.wzx.demo04mybatis.dao")//存放接口
public class Demo04mybatisApplication {
public static void main(String[] args) {
SpringApplication.run(Demo04mybatisApplication.class, args);
}
}
# Spring Boot集成Mybatis测试
- （4）编写Mapper
public interface PersonDao {
//全查
List<Person> findAllPersons();
}
- （5）配置Mapper映射文件
<?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.wzx.demo04mybatis.dao.PersonDao">
<select id="findAllPersons" resultType="person">
select * from person
</select>
</mapper>
- （6）测试
@SpringBootTest
class Demo04mybatisApplicationTests {
@Autowired
PersonDao dao;//Alt+Enter修复 disabled inspection
@Test
void test01() {
System.out.println(dao.findAllPersons());
}
}
Mysql驱动8的问题
java.sql.SQLException: The server time zone value
- （1）com.mysql.cj.jdbc.Driver
- （2）jdbcURL
jdbc:mysql://127.0.0.1:3306/test01?``useUnicode=true&characterEncoding=utf8&serverTimezone=GMT%2B8