# java-practice

**Repository Path**: quanw20/java-practice

## Basic Information

- **Project Name**: java-practice
- **Description**: Java 假期实训 使用SpringBoot
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2023-07-05
- **Last Updated**: 2023-07-21

## Categories & Tags

**Categories**: Uncategorized

**Tags**: Java, MySQL, JPA

## README

# Java 假期实训

# Java 假期实习终极版

## 技术栈

### 前端

| 技术         | 描述                              | 文档/官网                                |
| ------------ | --------------------------------- | ---------------------------------------- |
| TypeScript   | 有类型的JavaScript                | https://www.typescriptlang.org/          |
| React.js     | 用于构建 Web 和原生交互界面的库   | https://react.dev/                       |
| Next.js      | 服务器渲染、基于目录的路由        | https://nextjs.org/                      |
| Ant Design   | 企业级 UI 设计语言和 React 组件库 | https://ant.design/docs/react/introduce/ |
| Tailwind CSS | 类似BootStrap的CSS 库             | https://www.tailwindcss.cn/              |
| PostCSS      | 将CSS翻译成JavaScript             | https://postcss.org/                     |
| SWR          | 用于数据请求的 React Hooks 库     | https://swr.bootcss.com/                 |


### 后端

| 技术         | 描述                         | 文档/官网                                  |
| ------------ | ---------------------------- | ------------------------------------------ |
| SpringBoot   | Java Spring开发框架          | https://spring.io/projects/spring-boot     |
| Spring Cloud | 微服务框架                   | https://spring.io/projects/spring-cloud    |
| Lombok       | Java 对象封装代码生成工具    | https://projectlombok.org/                 |
| MySQL        | 关系型数据库                 | https://www.mysql.com/cn                   |
| JUnit        | Java单元测试                 | https://junit.org/junit5                   |
| JPA          | 全自动ORM框架                | https://spring.io/projects/spring-data-jpa |
| MyBatis      | ORM框架                      | http://www.mybatis.org                     |
| Redis        | 内存KV数据存储               | https://redis.io/                          |
| Nginx        | 反向代理、负载均衡服务器     | https://www.nginx.com/                     |
| Docker       | 应用容器引擎                 | https://www.docker.com                     |
| Swagger      | API 接口测试工具             | https://swagger.io/                        |
| MongoDB      | 文档数据库                   | https://www.mongodb.com                    |
| Mongoose     | Node.js的MongoDB对象建模工具 | https://mongoosejs.com/                    |
| Express      | Node.js的Web应用框架         | http://expressjs.com/                      |


## 接口

/users
post    /login
post    /signup
put     /

/products
get     /
get     /{pid}

/carts
get     /{uid}
post    /{uid}/

/orders 
get     /{uid}
post    /{uid}


## 环境

JDK 17

SpringBoot 3.1.1

spring-data 2023.0.1

## 模块

- module-view 前端页面
- module-user 用户管理模块
- module-product 商品管理模块
  - 

## MySQL

数据库

## JPA

通过id和password验证用户，返回User对象（User对象中没有password）
数据库中存储password的摘要，password字段只用于比对
插入password时摘要（将id作为盐值）
比对时对输入的password摘要，和数据库中的password比对

## Redis

先读缓存，未命中再读数据库，读取结果写缓存，返回

## ThymeLeaf

Thymeleaf is a popular Java-based template engine used for server-side rendering in web applications. It provides a wide
range of tags and attributes to dynamically generate HTML content. Here are some commonly used Thymeleaf tags:

1. `th:text`: Used to set the text content of an HTML element.
   Example: `<p th:text="${message}">Default message</p>`

2. `th:if` and `th:unless`: Used for conditional rendering of HTML elements.
   Example: `<p th:if="${condition}">This will be shown if the condition is true</p>`

3. `th:each`: Used for iterating over a collection and generating multiple HTML elements.
   Example:

```html

<ul>
  <li th:each="item : ${items}" th:text="${item}"></li>
</ul>
```

4. `th:attr`: Used to set or modify HTML attributes of an element.
   Example: `<a th:href="@{/home}" th:attr="title=${title}">Home</a>`

5. `th:fragment` and `th:include`: Used for reusing HTML fragments across multiple templates.
   Example:

```html
<!-- Fragment definition -->
<div th:fragment="header">Header content</div>

<!-- Include the fragment in another template -->
<div th:include="fragments/header :: header"></div>
```

6. `th:switch` and `th:case`: Used for conditional rendering based on multiple cases.
   Example:

```html

<th:block th:switch="${value}">
  <p th:case="'case1'">Case 1 content</p>
  <p th:case="'case2'">Case 2 content</p>
  <p th:case="*">Default case content</p>
</th:block>
```

```
Simple expressions:
  Variable Expressions: ${...}
  Selection Variable Expressions: *{...}
  Message Expressions: #{...}
  Link URL Expressions: @{...}
  Fragment Expressions: ~{...}
  
Literals
  Text literals: 'one text', 'Another one!',…
  Number literals: 0, 34, 3.0, 12.3,…
  Boolean literals: true, false
  Null literal: null
  Literal tokens: one, sometext, main,…
  
Text operations:
  String concatenation: +
  Literal substitutions: |The name is ${name}|
  
Arithmetic operations:
  Binary operators: +, -, *, /, %
  Minus sign (unary operator): -
  
Boolean operations:
  Binary operators: and, or
  Boolean negation (unary operator): !, not
  
Comparisons and equality:
  Comparators: >, <, >=, <= (gt, lt, ge, le)
  Equality operators: ==, != (eq, ne)
  
Conditional operators:
  If-then: (if) ? (then)
  If-then-else: (if) ? (then) : (else)
  Default: (value) ?: (defaultvalue)
  
Special tokens:
  No-Operation: _
```

## BootStrap

```html

<script src="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/5.2.3/js/bootstrap.bundle.min.js"
        integrity="sha384-/mhDoLbDldZc3qpsJHpLogda//BVZbgYuw6kof4u2FrCedxOtgRZDTHgHUhOCVim"
        crossorigin="anonymous"></script>
<link href="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/5.2.3/css/bootstrap.min.css" rel="stylesheet"
      integrity="sha384-GLhlTQ8iRABdZLl6O3oVMWSktQOp6b7In1Zl3/Jr59b6EGGoI1aFkw7cmDA6j6gD" crossorigin="anonymous">
```