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Mybatis-Flex 一个优雅的 Mybatis 增强框架
特征
- 1、很轻量,整个框架只依赖 Mybatis 再无其他任何第三方依赖
- 2、Entity 类基本的增删改查、分页查询
- 3、Row 通用映射支持,可以无需实体类对数据库进行增删改查
- 4、支持多种数据库类型,自由通过方言持续扩展
- 5、支持联合主键,以及不同的主键下的主键内容生成策略
- 6、极其友好的 SQL 联动查询,IDE 自动提示不再担心出错
- 7、以及更多小惊喜
hello world
实体类
@Table("tb_account")
public class Account {
@Id()
private Long id;
private String userName;
private Date birthday;
private int sex;
//getter setter
}
AccountMapper 类
public interface AccountMapper extends BaseMapper<Account> {
//只需定义 Mapper 接口即可,可以无任何内容。
}
Hello world
示例 1:查询 1 条数据
class HelloWorld {
public static void main(String... args) {
HikariDataSource dataSource = new HikariDataSource();
dataSource.setJdbcUrl("jdbc:mysql://127.0.0.1:3306/mybatis-flex");
dataSource.setUsername("username");
dataSource.setPassword("password");
MybatisFlexBootstrap.getInstance()
.setDatasource(dataSource)
.addMapper(AccountMapper.class)
.start();
//示例1:查询 id=100 条数据
Account account = MybatisFlexBootstrap.getInstance()
.execute(AccountMapper.class, mapper ->
mapper.selectOneById(100)
);
}
}
示例2:查询列表
class HelloWorld {
public static void main(String... args) {
HikariDataSource dataSource = new HikariDataSource();
dataSource.setJdbcUrl("jdbc:mysql://127.0.0.1:3306/mybatis-flex");
dataSource.setUsername("username");
dataSource.setPassword("password");
MybatisFlexBootstrap.getInstance()
.setDatasource(dataSource)
.addMapper(AccountMapper.class)
.start();
//示例2:通过 QueryWrapper 构建条件查询数据列表
QueryWrapper query = QueryWrapper.create()
.select()
.from(ACCOUNT)
.where(ACCOUNT.ID.ge(100))
.and(ACCOUNT.USER_NAME.like("张").or(ACCOUNT.USER_NAME.like("李")));
// 执行 SQL:
// ELECT * FROM `tb_account`
// WHERE `tb_account`.`id` >= 100
// AND (`tb_account`.`user_name` LIKE '%张%' OR `tb_account`.`user_name` LIKE '%李%' )
List<Account> accounts = MybatisFlexBootstrap.getInstance()
.execute(AccountMapper.class, mapper ->
mapper.selectListByQuery(query)
);
}
}
示例3:分页查询
class HelloWorld {
public static void main(String... args) {
HikariDataSource dataSource = new HikariDataSource();
dataSource.setJdbcUrl("jdbc:mysql://127.0.0.1:3306/mybatis-flex");
dataSource.setUsername("username");
dataSource.setPassword("password");
MybatisFlexBootstrap.getInstance()
.setDatasource(dataSource)
.addMapper(AccountMapper.class)
.start();
// 示例3:分页查询
// 查询第 5 页,每页 10 条数据,通过 QueryWrapper 构建条件查询
QueryWrapper query = QueryWrapper.create()
.select()
.from(ACCOUNT)
.where(ACCOUNT.ID.ge(100))
.and(ACCOUNT.USER_NAME.like("张").or(ACCOUNT.USER_NAME.like("李")))
.orderBy(ACCOUNT.ID.desc());
// 执行 SQL:
// ELECT * FROM `tb_account`
// WHERE `tb_account`.`id` >= 100
// AND (`tb_account`.`user_name` LIKE '%张%' OR `tb_account`.`user_name` LIKE '%李%' )
// ORDER BY `tb_account`.`id` DESC
// LIMIT 40,10
Page<Account> accounts = MybatisFlexBootstrap.getInstance()
.execute(AccountMapper.class, mapper ->
mapper.paginate(5, 10, query)
);
}
}
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