Mybatis 高级用法和tk.mybatis使用示例详解

@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
@Repeatable(SelectProvider.List.class)
public @interface SelectProvider {
  	// 用于指定获取 sql 语句的指定类
    Class<?> type();
    // 指定类中要执行获取 sql 语句的方法
    String method();
}

@Mapper
public interface TkUserMapper extends BaseMapper<TkUser> {
    @SelectProvider(type = TkUserMapperProvider.class, method = "selectById")
    List<TkUser> selectById(@Param("id") String id);
    class TkUserMapperProvider {
        public String selectById(@Param("id") String id) {
            SQL sql = new SQL();
            sql.SELECT("*");
            sql.FROM("TEST_USER");
            return sql.toString();
        }
    }
}

<!-- mybatis 通用 mapper -->
<!-- https://mvnrepository.com/artifact/tk.mybatis/mapper-spring-boot-starter -->
<dependency>
    <groupId>tk.mybatis</groupId>
    <artifactId>mapper-spring-boot-starter</artifactId>
    <version>4.3.0</version>
</dependency>

@Table(name = "USER")
public class TkUser {
    private int id;
    private String username;
    private String password;
    private int gender;
    private int age;
    private int idcard;
    private int phone;
    // get set 省略
}

@Mapper
public interface TkUserMapper extends BaseMapper<TkUser> {
    @SelectProvider(type = TkUserMapperProvider.class, method = "selectById")
    List<TkUser> selectById(@Param("id") String id);
    class TkUserMapperProvider {
        public String selectById(@Param("id") String id) {
            SQL sql = new SQL();
            sql.SELECT("*");
            sql.FROM("TEST_USER");
            return sql.toString();
        }
    }
}

@Autowired
private TkUserMapper tkUserMapper;
@Override
public void test1() {
    String id = "1";
    List<TkUser> tkUserList =  tkUserMapper.selectById(id);
    log.info("test");
}