Tigon MyBatis v0.0.6 发布，再见 2020

栏目: 软件资讯 · 发布时间: 3年前

内容简介：Release Notes 优化Search#eq，Search#ne参数为NULL时候处理为is null，is not null @UseGeneratedKeys注解支持多参数增加查询方法BaseQueryMapper#list(List keys)，BaseQueryMapper#list(PrimarayKey[] keys) ...

Release Notes

优化Search#eq，Search#ne参数为NULL时候处理为is null，is not null
@UseGeneratedKeys注解支持多参数
增加查询方法BaseQueryMapper#list(List keys)，BaseQueryMapper#list(PrimarayKey[] keys)
优化Jdbc3KeyGen实现，增加共享变量
优化SqlSessionFactory增强，只有发现SupperMapper子类，才做增强
查询、更新支持驼峰格式属性名，转换为下划线列名
完善单元测试
代码简化，优化

Tigon MyBatis

简介

Tigon MyBatis为Spring工程中MyBatis的Mapper提供增强，主要有以下特点

代码又少又壮，绝不做多余的事情
仅需Mapper继承接口，实现增 删 改 查，无额外配置，爽到没女朋友
用完即走，毫不留恋

开始使用

引入Maven依赖

<dependency>
  <groupId>me.chyxion.tigon</groupId>
  <artifactId>tigon-mybatis</artifactId>
  <version>0.0.6</version>
</dependency>

使用示例

下面是使用示例，可以在源代码中找到更详细的单元测试。Talk is cheep，read the fine source code.

定义Entity

package me.chyxion.tigon.mybatis.entity;

import lombok.Getter;
import lombok.Setter;
import java.util.Date;
import lombok.ToString;
import java.io.Serializable;
import me.chyxion.tigon.mybatis.Table;
import me.chyxion.tigon.mybatis.NotUpdate;

@Getter
@Setter
@ToString
@Table("tb_user")
public class User implements Serializable {
    private static final long serialVersionUID = 1L;

    private Integer id;
    @NotUpdate
    private String account;
    private String mobile;
    private String name;
    private Gender gender;
    private String password;
    private Date birthDate;
    private String city;
    private String avatar;

    private Boolean active;
    private String remark;
    private String createdBy;
    private Date createdAt;
    private String updatedBy;
    private Date updatedAt;

    public enum Gender {
        MALE,
        FEMALE
    }
}

定义Mapper

package me.chyxion.tigon.mybatis.mapper;

import java.util.List;
import me.chyxion.tigon.mybatis.BaseMapper;
import org.apache.ibatis.annotations.Mapper;
import me.chyxion.tigon.mybatis.entity.User;

@Mapper
public interface UserMapper extends BaseMapper<Integer, User> {
}

注入Mapper对象

@Autowired
private UserMapper mapper;

I. 插入

final User user = new User();
user.setName("Donghuang");
user.setAccount("donghuang");
user.setMobile("137647788xx");
user.setPassword(RandomStringUtils.randomAlphanumeric(16));
user.setGender(User.Gender.MALE);
user.setBirthDate(DateUtils.parseDate("1994-04-04"));
user.setCity("Shanghai");
user.setActive(true);
user.setRemark("Uncle Donghuang");
user.setCreatedBy("donghuang");
user.setCreatedAt(new Date());

// single insert
mapper.insert(user);

final User user1 = new User();
user1.setName("Gemily");
user1.setAccount("gemily");
user1.setMobile("15770780xxx");
user1.setPassword(RandomStringUtils.randomAlphanumeric(16));
user1.setGender(User.Gender.FEMALE);
user1.setBirthDate(DateUtils.parseDate("1990-06-06"));
user1.setCity("Hangzhou");
user1.setActive(true);
user1.setCreatedBy("donghuang");
user1.setCreatedAt(new Date());

final User user2 = new User();
user2.setName("Luffy");
user2.setAccount("luffy");
user2.setMobile("137647799xx");
user2.setPassword(RandomStringUtils.randomAlphanumeric(16));
user2.setGender(User.Gender.MALE);
user2.setBirthDate(DateUtils.parseDate("1997-07-07"));
user2.setCity("East sea");
user2.setActive(true);
user2.setRemark("Luffy");
user2.setCreatedBy("donghuang");
user2.setCreatedAt(new Date());

// batch insert
mapper.insert(Arrays.asList(user1, user2));

II. 查询

根据ID查询单个对象

final Integer id = 1154;
final User user = mapper.find(id);

根据属性查询单个对象

final User user = mapper.find(
    new Search("account", "donghuang")
        .eq("mobile", "137647788xx"));

根据属性查询列表

final List<User> users = mapper.list(new Search()
    .between("birth_date",
        DateUtils.parseDate("1982-04-04"),
        DateUtils.parseDate("1994-04-04")
    )
    .eq("gender", User.Gender.MALE)
    .asc("birth_date")
    .limit(42));

Search对象支持的API

and And another Search
asc Order ASC
between Between two values
build Build query criterion
contains Value contains string
desc Order DSC
endsWith Value ends with string
eq Eqauls
gt Greater than
gte Eqauls or greater than
in In values
isNull Value is null
like Value like
limit Return rows limit
lt Less than
lte Eqauls or less than
ne Not equals
notIn Not in values
notNull Value is not null
offset Return rows offset
or Or another Search
orderBy Order by
startsWith Value starts with string

III. 更新

通过Entity根据ID更新

final User user = mapper.find(1);

user.setName("东皇大叔");
user.setUpdatedBy("SYS");
user.setUpdatedAt(new Date());

mapper.update(user);

通过Map<String, Object>更新

final Map<String, Object> update = new HashMap<>(6);
update.put("name", "东皇大叔");
update.put("updatedBy", "SYS");
update.put("updatedAt", new Date());

mapper.update(update, 1);
// OR
// mapper.update(update, new Search("id", 1));
// mapper.update(update, new Search(1));

更新列为NULL

// Update remark to NULL of id 274229
mapper.setNull("remark", 274229);
// Update remark to NULL of id 1154L
mapper.setNull("remark", new Search("id", 1154));
// Update all remarks to NULL. BE CAREFUL!!!
mapper.setNull("remark", new Search());

IV. 删除

通过ID删除数据

mapper.delete(1);

通过Search对象删除数据

mapper.delete(new Search("id", 1));

V. 杂项

除了上面说到的一些基础增删改查操作，还有一些实用功能，如@Transient @UseGeneratedKeys @NoPrimaryKey @NotUpdateWhenNull @RawValue等注解，插入、更新前回调，以及支持扩展自定义的方法等。

配置说明

SpringBoot项目，无需其他操作，引入依赖即可
Spring项目，注册Bean me.chyxion.tigon.mybatis.TigonMyBatisConfiguration
业务Mapper继承me.chyxion.tigon.mybatis.BaseMapper或相关衍生Mapper，Base(Query, Insert, Update, Delete)Mapper

原理

Tigon MyBatis并不改变MyBatis相关功能，所做的只是在程序启动期间检测业务Mapper接口，如果继承了相关BaseMapper.java，则注入相关方法MappedStatement，具体逻辑参见源码，超简单，超幼稚。

其他

在前面使用Search的例子中，我们需要一些User的属性常量字符串，比如

final User user = mapper.find(new Search("account", "donghuang"));

可以将这些常量定义在User类中，如

public static final String ACCOUNT = "account";

使用过程中可以使用属性常量，如

final User user = mapper.find(new Search(User.ACCOUNT, "donghuang"));

也可以使用Lombok的@FieldNameConstants注解生成，只是这个注解还处于试验阶段，有一定不稳定风险。

以上所述就是小编给大家介绍的《Tigon MyBatis v0.0.6 发布，再见 2020》，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对码农网的支持！

查看所有标签

猜你喜欢:

本站部分资源来源于网络，本站转载出于传递更多信息之目的，版权归原作者或者来源机构所有，如转载稿涉及版权问题，请联系我们。

码农书籍

About Face 2.0

Alan Cooper、Robert M. Reimann / Wiley / March 17, 2003 / USD 35.00

First published seven years ago-just before the World Wide Web exploded into dominance in the software world-About Face rapidly became a bestseller. While the ideas and principles in the original book......一起来看看《About Face 2.0》这本书的介绍吧!

码农工具