Spring Boot注解方式集成Mybatis-优快云博客

本文介绍如何在Spring Boot项目中整合MyBatis，并采用无配置文件注解的方式实现数据库操作。文章详细展示了pom.xml文件中必要的依赖引入、application.properties配置项设置、启动类及Mapper接口的创建过程。

一、无配置文件注解版

1.pom文件必要jar包的引入

1 <dependency>
2 <groupId>mysql</groupId>
3 <artifactId>mysql-connector-java</artifactId>
4 </dependency>
5 <dependency>
6 <groupId>org.mybatis.spring.boot</groupId>
7 <artifactId>mybatis-spring-boot-starter</artifactId>
8 <version>1.1.1</version>
9 </dependency>

2.application.properties添加相关配置

　　SpringBoot会自动加载application.properties配置文件，会读取spring.datasource.*相关的配置，数据源会自动注入到sqlSessionFactory中，sqlSessionFactory会自动注入到Mapper中

　　会扫描的model实体类路径

1 mybatis.type-aliases-package=com.neo.entity spring.datasource.driverClassName = com.mysql.jdbc.Driver spring.datasource.url = jdbc:mysql://localhost:3306/test1?
2 useUnicode=true&characterEncoding=utf-8
3 spring.datasource.username = root
4 spring.datasource.password = root

3.建立启动类

@SpringBootApplication @MapperScan("com.neo.mapper") 
public class Application { 
    public static void main(String[] args) {         
        SpringApplication.run(Application.class, args); 
    } 
}

　　或者在Mapper雷尚添加注解@Mapper

4.mapper文件配置

 1 public interface UserMapper { 
 2 @Select("SELECT * FROM users") @Results({ @Result(property = "userSex", column = "user_sex", javaType = UserSexEnum.class), @Result(property = "nickName", column = "nick_name") }) List<UserEntity> getAll();
 3 @Select("SELECT * FROM users WHERE id = #{id}") 
 4 @Results({ @Result(property = "userSex", column = "user_sex", javaType = UserSexEnum.class), 
 5 @Result(property = "nickName", column = "nick_name") }) 
 6 UserEntity getOne(Long id); @Insert("INSERT INTO users(userName,passWord,user_sex) VALUES(#{userName}, #{passWord}, #{userSex})") void insert(UserEntity user); 
 7 @Update("UPDATE users SET userName=#{userName},nick_name=#{nickName} WHERE id =#{id}") 
 8 void update(UserEntity user); 
 9 @Delete("DELETE FROM users WHERE id =#{id}") 
10 void delete(Long id); }