文章目錄

• • 環境搭建
  • 配置
  • 注解

環境搭建

# mysql數據庫連接 spring.datasource.driver-class-name=com.mysql.jdbc.Driver spring.datasource.url=jdbc:mysql://localhost:3306/book spring.datasource.username=root spring.datasource.password=12345 # 配置mybatis規則 mybatis:# config-location: classpath:mybatis/mybatis-config.xmlmapper-locations: classpath:mybatis/mapper/*.xmlconfiguration:map-underscore-to-camel-case: true # 開啟駝峰命名# 可以不寫全局；配置文件，所有全局配置文件的配置都放在configuration配置項中即可

配置

UserMapper.xml

<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="com.example.demo.mapper.UserMapper"><!-- public Account getAcct(Long id); --><select id="getUser" resultType="com.example.demo.bean.User">select * from t_user where id=#{id}</select><select id="listUser" resultType="com.example.demo.bean.User">select * from t_user</select> </mapper>

UserService

@Service public class UserService {@AutowiredUserMapper userMapper;public User getUserById(int id){return userMapper.getUser(id);} }

UserMapper

public interface UserMapper {public User getUser(int id);public List<User> listUser();}

MybatisController

@RestController public class MybatisController {@AutowiredUserService userService;@GetMapping("/user")public User getById(@RequestParam("id") int id){return userService.getUserById(id);} }

注解

BookMapper

public interface BookMapper {@Select("select * from t_book where id=#{id}")public Book getBookById(int book); } 與50位技術專家面對面20年技術見證，附贈技術全景圖

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