+---------+------+--------+
| book_id | name | number |
+---------+------+--------+
|       1 | b1   |    123 |
|       2 | b2   |    123 |
|       3 | b3   |   2343 |
+---------+------+--------+
3 rows in set (0.00 sec)

+---------+------+--------+
| book_id | name | number |
+---------+------+--------+
|       1 | b1   |    123 |
|       2 | b2   |    123 |
|       3 | b3   |   2343 |
|       4 | b4   |  22343 |
|       5 | b5   |     43 |
+---------+------+--------+
5 rows in set (0.00 sec)

alter table book nocache

# Spring
spring.resources.static-locations=classpath:/static/

# MyBatis
mybatis.configuration.map-underscore-to-camel-case=true
mybatis.configuration.local-cache-scope=statement
# DataSource 1
spring.datasource.db1.url=jdbc:oracle:thin:@*******
spring.datasource.db1.username=***
spring.datasource.db1.password=***
spring.datasource.db1.driver-class-bookName=oracle.jdbc.OracleDriver

@Mapper
@Qualifier("bookMapper")
public interface BookMapper {
    @Select({"select * from book"})
    @Options(useCache = false)
    @Results({
            @Result(property = "bookId",column = "book_id"),
            @Result(property = "bookName",column = "book_name"),
            @Result(property = "bookNumber",column = "book_number")
    })
    List<BookEntity>  getALL();
//    insertBook();
}

public class BookEntity {
    long bookId;
    String bookName;
    int bookNumber;

    //getters and setters


}