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https://github.com/houbb/hibernate
The simple database orm hibernate.(java 从零实现简易版本 hibernate)
https://github.com/houbb/hibernate
database hibernate jdbc mybatis orm
Last synced: 9 days ago
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The simple database orm hibernate.(java 从零实现简易版本 hibernate)
- Host: GitHub
- URL: https://github.com/houbb/hibernate
- Owner: houbb
- License: other
- Created: 2024-07-29T16:43:24.000Z (4 months ago)
- Default Branch: main
- Last Pushed: 2024-07-29T17:13:56.000Z (4 months ago)
- Last Synced: 2024-07-29T22:31:42.427Z (4 months ago)
- Topics: database, hibernate, jdbc, mybatis, orm
- Language: Java
- Homepage:
- Size: 46.9 KB
- Stars: 1
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- License: LICENSE.txt
Awesome Lists containing this project
README
# 项目简介
java 从零实现简易版本的 [hibernate](https://github.com/houbb/hibernate)
[](http://mvnrepository.com/artifact/com.github.houbb/hibernate)
[](https://www.travis-ci.org/houbb/hibernate?branch=master)
[](https://coveralls.io/github/houbb/hibernate?branch=master)
# 变更日志
> [变更日志](CHANGELOG.md)
# 核心特性
- 简单版本的 hibernate
- 建表语句生成+执行
- 插入语句生成+执行
# 快速开始
## 需要
jdk1.3+
maven 3.x+
## maven 引入
```xml
com.github.houbb
hibernate
0.1.0
```
## 入门测试
### 环境准备
首先准备一个 mysql 对应的测试库 `hibernate`
```
mysql> create database hibernate;
Query OK, 1 row affected (0.00 sec)
mysql> use hibernate;
Database changed
```
### 配置信息
我们配置一下 `hibernate.cfg.xml` 为对应的数据库访问信息：
```xml
com.mysql.jdbc.Driver
jdbc:mysql://localhost:3306/hibernate
root
123456
```
### 建表语句
SQL 的生成：
```java
Table table = new Table();
User user = new User();
System.out.println(table.buildCreateTableSQL(user));
```
结果为：
```sql
create table t_user (id BIGINT AUTO_INCREMENT, name VARCHAR(255), password VARCHAR(255), myAge INTEGER , createOn DATETIME, modifiedOn DATETIME , PRIMARY KEY (`id`) );
```
### 执行建表
我们可以直接通过程序建表
```java
Session session = new Session();
Table table = new Table();
User user = new User();
Connection connection = session.createConnection();
PreparedStatement preparedStatement = connection.prepareStatement(table.buildCreateTableSQL(user));
preparedStatement.execute();
```
执行后：
```
mysql> show tables;
+---------------------+
| Tables_in_hibernate |
+---------------------+
| t_user |
+---------------------+
1 row in set (0.00 sec)
```
表结构
```
mysql> desc t_user;
+------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+------------+--------------+------+-----+---------+----------------+
| id | bigint(20) | NO | PRI | NULL | auto_increment |
| name | varchar(255) | YES | | NULL | |
| password | varchar(255) | YES | | NULL | |
| myAge | int(11) | YES | | NULL | |
| createOn | datetime | YES | | NULL | |
| modifiedOn | datetime | YES | | NULL | |
+------------+--------------+------+-----+---------+----------------+
6 rows in set (0.01 sec)
```
PS: 这里可以看到对应的字段没有驼峰转下划线
## 数据的插入
### 插入语句
```java
User user = new User();
user.setId(3L);
user.setName("ryo");
user.setAge(21);
user.setPassword("123456");
user.setCreateOn(new Date());
user.setModifiedOn(new Date());
System.out.println(new Session().buildInsertSQL(user));
```
结果为：
```sql
INSERT INTO t_user ( id,name,password,myAge,createOn,modifiedOn ) VALUES ( '3','ryo','123456','21','2024-07-30 00:37:36','2024-07-30 00:37:36' ) ;
```
### 程序插入
也可以程序直接插入
```java
User user = new User();
user.setId(3L);
user.setName("ryo");
user.setAge(21);
user.setPassword("123456");
user.setCreateOn(new Date());
user.setModifiedOn(new Date());
new Session().save(user);
```
效果
```
mysql> select * from t_user;
+----+------+----------+-------+---------------------+---------------------+
| id | name | password | myAge | createOn | modifiedOn |
+----+------+----------+-------+---------------------+---------------------+
| 3 | ryo | 123456 | 21 | 2024-07-30 00:38:14 | 2024-07-30 00:38:14 |
+----+------+----------+-------+---------------------+---------------------+
1 row in set (0.00 sec)
```
# ROAD-MAP
- [ ] 添加基于 gen-case 的测试用例
- [ ] 建表对应的字段没有驼峰转下划线
- [ ] CRUD
- [ ] list 等常见查询
# 手写 Hibernate 系列
[手写 Hibernate ORM 框架-01-注解定义、常量定义](https://blog.csdn.net/ryo1060732496/article/details/80172494)
[手写 Hibernate ORM 框架-02-实体 Bean 定义，建表语句自动生成](https://blog.csdn.net/ryo1060732496/article/details/80173002)
[手写 Hibernate ORM 框架-03-Hibernate 配置文件读取, 数据库连接构建](https://blog.csdn.net/ryo1060732496/article/details/80173101)
[手写 Hibernate ORM 框架-04-数据库交互，数据持久化](https://blog.csdn.net/ryo1060732496/article/details/80173244)
## 从零手写组件系列
[java 从零手写 spring ioc 控制反转](https://github.com/houbb/ioc)
[java 从零手写 spring mvc](https://github.com/houbb/mvc)
[java 从零手写 jdbc-pool 数据库连接池](https://github.com/houbb/jdbc-pool)
[java 从零手写 mybatis](https://github.com/houbb/mybatis)
[java 从零手写 hibernate](https://github.com/houbb/hibernate)
[java 从零手写 rpc 远程调用](https://github.com/houbb/rpc)
[java 从零手写 mq 消息组件](https://github.com/houbb/rpc)
[java 从零手写 cache 缓存](https://github.com/houbb/cache)
[java 从零手写 nginx4j](https://github.com/houbb/nginx4j)
[java 从零手写 tomcat](https://github.com/houbb/minicat)