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Update >> 完成首页问题列表展示
Fix Bug >> 提交问题落库没有时间
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‎README.md‎

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>[Spring Mybaits](https://mybatis.org/mybatis-3/zh/index.html)
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>[Flyway Migration](https://flywaydb.org/getstarted/firststeps/maven)
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>[Project Lombok](https://projectlombok.org/)
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>[Thymeleaf](https://thymeleaf.org/doc/tutorials/3.0/usingthymeleaf.html#setting-srreibute-values)
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工具
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>代码版本管理[GitHub](https://github.com)
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>流程图[Visual Paradigm](https://www.visual-paradigm.com)
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>数据库版本脚本管理[Flyway Migration](https://flywaydb.org/getstarted/firststeps/maven)
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>自动插入编辑器并构建工具[Project Lombok](https://projectlombok.org/)
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>
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> # Git 使用
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> ```shell script
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> 5. 实现持久化登录 服务器下发 user_token 并在数据库查询
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> 6. 集成 `Flyway Migration` 统一数据库结构脚本(数据库版本控制)
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> 7. 添加 `Lombok` 支持 自动构建
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> 8. 完善首页问题列表展示
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```markdown
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*Flyway Migration*

‎projectTree‎

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D:.
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├── ProjectTree // 项目结构介绍
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├── README.md
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├── Wiki.md
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├── bash.exe.stackdump
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├── community.iml
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├── mvnw
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├── mvnw.cmd
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├── pom.xml // Maveny依赖
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├── src
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│   ├── main
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│   │   ├── java
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│   │   │   └── life
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│   │   │   ├── CommunityApplication.java
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│   │   │   └── majiang
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│   │   │   └── community // 控制器
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│   │   │   ├── controller
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│   │   │   │   ├── AuthorizeController.java
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│   │   │   │   ├── HelloController.java // 测试
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│   │   │   │   ├── IndexController.java
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│   │   │   │   └── PublishController.java
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│   │   │   ├── dto // 传输层
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│   │   │   │   ├── AccessTokenDTO.java
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│   │   │   │   ├── GithubUser.java
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│   │   │   │   └── QuestionDTO.java
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│   │   │   ├── mapper // 映射层
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│   │   │   │   ├── QuestionMapper.java
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│   │   │   │   └── UserMapper.java
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│   │   │   ├── model // 数据库模型
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│   │   │   │   ├── Question.java
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│   │   │   │   └── User.java
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│   │   │   ├── provider // 连接层
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│   │   │   │   └── GithubProvider.java
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│   │   │   └── service // 服务层 中间层
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│   │   │      └── QuestionService
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│   │   └── resources // 资源
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│   │   ├── application.properties // 启动入口
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│   │   ├── db // 数据库
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│   │   │   └── migration //版本控制
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│   │   │   ├── V1__Create_User_table.sql
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│   │   │   ├── V2__Add_bio_To_User_table.sql
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│   │   │   ├── V3__Create_question_table.sql
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│   │   │   └── V4__Add_avatar_url_To_UserTable.sql
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│   │   ├── static
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│   │   │   ├── css // 样式
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│   │   │   │   ├── bootstrap-theme.css
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│   │   │   │   ├── bootstrap-theme.css.map
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│   │   │   │   ├── bootstrap-theme.min.css
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│   │   │   │   ├── bootstrap-theme.min.css.map
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│   │   │   │   ├── bootstrap.css
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│   │   │   │   ├── bootstrap.css.map
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│   │   │   │   ├── bootstrap.min.css
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│   │   │   │   ├── bootstrap.min.css.map
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│   │   │   │   └── community.css
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│   │   │   ├── fonts
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│   │   │   │   ├── glyphicons-halflings-regular.eot
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│   │   │   │   ├── glyphicons-halflings-regular.svg
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│   │   │   │   ├── glyphicons-halflings-regular.ttf
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│   │   │   │   ├── glyphicons-halflings-regular.woff
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│   │   │   │   └── glyphicons-halflings-regular.woff2
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│   │   │   └── js // js脚本
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│   │   │   ├── bootstrap.js
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│   │   │   ├── bootstrap.min.js
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│   │   │   └── npm.js
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│   │   └── templates // Web页面
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│   │   ├── hello.html // 测试
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│   │   ├── index.html
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│   │   └── publish.html
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│   └── test
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│   └── java
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│   └── life
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│   └── majiang
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│   └── community
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│   └── CommunityApplicationTests.java
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└── target
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├── classes
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│   ├── application.properties
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│   ├── db
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│   │   └── migration
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│   │   ├── V1__Create_User_table.sql
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│   │   ├── V2__Add_bio_To_User_table.sql
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│   │   ├── V3__Create_question_table.sql
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│   │   └── V4__Add_avatar_url_To_UserTable.sql
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│   ├── life
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│   │   ├── CommunityApplication.class
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│   │   └── majiang
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│   │   └── community
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│   │   ├── controller
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│   │   │   ├── AuthorizeController.class
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│   │   │   └── PublishController.class
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│   │   ├── dto
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│   │   │   ├── AccessTokenDTO.class
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│   │   │   ├── GithubUser.class
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│   │   │   └── QuestionDTO.class
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│   │   ├── mapper
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│   │   │   ├── QuestionMapper.class
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│   │   │   └── UserMapper.class
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│   │   ├── model
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│   │   │   ├── Question.class
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│   │   │   └── User.class
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│   │   └── provider
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│   │   └── GithubProvider.class
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│   ├── static
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│   │   ├── css
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│   │   │   ├── bootstrap-theme.css
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│   │   │   ├── bootstrap-theme.css.map
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│   │   │   ├── bootstrap-theme.min.css
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│   │   │   ├── bootstrap-theme.min.css.map
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│   │   │   ├── bootstrap.css
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│   │   │   ├── bootstrap.css.map
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│   │   │   ├── bootstrap.min.css
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│   │   │   ├── bootstrap.min.css.map
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│   │   │   └── community.css
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│   │   ├── fonts
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│   │   │   ├── glyphicons-halflings-regular.eot
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│   │   │   ├── glyphicons-halflings-regular.svg
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│   │   │   ├── glyphicons-halflings-regular.ttf
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│   │   │   ├── glyphicons-halflings-regular.woff
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│   │   │   └── glyphicons-halflings-regular.woff2
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│   │   └── js
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│   │   ├── bootstrap.js
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│   │   ├── bootstrap.min.js
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│   │   └── npm.js
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│   └── templates
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│   ├── hello.html
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│   ├── index.html
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│   └── publish.html
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├── generated-sources
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│   └── annotations
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├── generated-test-sources
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│   └── test-annotations
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└── test-classes
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└── life
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└── majiang
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└── community
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└── CommunityApplicationTests.class
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50 directories, 84 files

‎src/main/java/life/majiang/community/controller/AuthorizeController.java‎

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String token = UUID.randomUUID().toString();
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/** token 放入 User 对象中并存储到数据库 */
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user.setToken(token); // 生成唯一的标识码
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user.setName(githubUser.getName());
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user.setAccountID(String.valueOf(githubUser.getId()));
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user.setGmtCreate(System.currentTimeMillis());
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user.setGmtModified(user.getGmtCreate());
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user.setAvatarUrl(githubUser.getAvatar_url());
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user.setName(githubUser.getName()); // set 用户名
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user.setAccountID(String.valueOf(githubUser.getId())); // set 用户第三方id
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user.setGmtCreate(System.currentTimeMillis()); // set 创建时间
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user.setGmtModified(user.getGmtCreate()); // set 更新时间
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user.setAvatarUrl(githubUser.getAvatar_url()); // set 用户头像
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System.out.println("--->>> usermapper >>>--- " + userMapper);
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System.out.println("--->>> insertuser >>>--- " + user);
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userMapper.insert(user);
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userMapper.insert(user); // 执行SQL
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/** Cookie 写入 */
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// 自动写入 服务器生成 Token 放入 Cookie
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response.addCookie(new Cookie("token", token));

‎src/main/java/life/majiang/community/controller/IndexController.java‎

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package life.majiang.community.controller;
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/*
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* 传输层
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* 定义自己的 index
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*/
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import life.majiang.community.dto.QuestionDTO;
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import life.majiang.community.mapper.UserMapper;
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import life.majiang.community.model.User;
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import life.majiang.community.service.QuestionService;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Controller;
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import org.springframework.ui.Model;
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import org.springframework.web.bind.annotation.GetMapping;
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import javax.servlet.http.Cookie;
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import javax.servlet.http.HttpServletRequest;
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import java.util.List;
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@Controller
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public class IndexController {
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@Autowired // 注入 UserMapper
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private UserMapper userMapper;
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@Autowired // 注入 UserMapper
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private QuestionService questionService;
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/**
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* 访问首页的时候 循环看所有的Cookie
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* 找到 Cookie 为 token 的值
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* 前端通过页面数据判断是否登录
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*/
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@GetMapping("/")
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public String index(HttpServletRequest request) {
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public String index(HttpServletRequest request,
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Model model) {
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Cookie[] cookies = request.getCookies(); // 获取用户 cookie
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if (cookies != null && cookies.length != 0) {// 判断是用户 Cookie 是否为空 长度不为0
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for (Cookie cookie : cookies) {
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User user = userMapper.findByToken(token);
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// 如果user != null 写入session
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if (user != null) {
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System.out.println(user.toString());
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request.getSession().setAttribute("user", user);
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}
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break; // 命中后结束循环
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}
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}
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}
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// 获取 question_list
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// List<Question> questionList = questionMapper.list(); // question表不能返回用户头像
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List<QuestionDTO> questionList = questionService.list();
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model.addAttribute("questions", questionList); // 此处返回除question信息外还有User信息
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return "index";
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}
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}

‎src/main/java/life/majiang/community/controller/PublishController.java‎

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* publish_page 问题提内容
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* */
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Question question = new Question();
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question.setTitle(title);
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question.setDescription(description);
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question.setTag(tag);
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question.setCreator(user.getId());
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questionMapper.create(question);
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question.setTitle(title);// set 标题
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question.setDescription(description);// set 内容
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question.setTag(tag);// set 标签
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question.setCreator(user.getId());// set 提问者id
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question.setGmtCreate(System.currentTimeMillis()); // set 创建时间
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question.setGmtModified(System.currentTimeMillis()); // set 更新时间
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questionMapper.create(question); // 执行SQL
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return "redirect:/"; // 成功返回 首页
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}
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}

‎src/main/java/life/majiang/community/dto/QuestionDTO.java‎

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package life.majiang.community.dto;
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import life.majiang.community.model.User;
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import lombok.Data;
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@Data
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public class QuestionDTO {
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private Integer id; // 问题自增id
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private String title; // title
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private String description; // 描述
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private String tag; // 标签
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private Long gmtCreate; // 创建时间
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private Long gmtModified; // 更新时间
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private Integer creator; // 创建者
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private Integer viewCount; // 阅读数
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private Integer commentCount; // 提交数
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private Integer likeCount; // 点赞数
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private User user; // 用户头像
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}

‎src/main/java/life/majiang/community/mapper/QuestionMapper.java‎

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import life.majiang.community.model.Question;
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import org.apache.ibatis.annotations.Insert;
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import org.apache.ibatis.annotations.Mapper;
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import org.apache.ibatis.annotations.Select;
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import java.util.List;
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@Mapper
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public interface QuestionMapper {
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@Insert("insert into question (title, description, gmt_create, gmt_modified, creator, tag) " +
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"values (#{title}, #{description}, #{gmtCreate}, #{gmtModified}, #{creator}, #{tag})")
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void create(Question question);
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@Select("select * from question")
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List<Question> list();
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}

‎src/main/java/life/majiang/community/mapper/UserMapper.java‎

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/*
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* 引入数据库
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* 类会自动放入 不是的需要引入 @Param 注解
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* 类会自动放入 不是的类的 需要引入 @Param 注解
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*/
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@Mapper
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public interface UserMapper {
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@Select("select * from USER where token = #{token}")
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User findByToken(@Param("token") String token);
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@Select("select * from USER where id = #{id}")
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User findByID(@Param("id") Integer id);
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}

‎src/main/java/life/majiang/community/service/QuestionService.java‎

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package life.majiang.community.service;
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import life.majiang.community.dto.QuestionDTO;
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import life.majiang.community.mapper.QuestionMapper;
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import life.majiang.community.mapper.UserMapper;
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import life.majiang.community.model.Question;
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import life.majiang.community.model.User;
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import org.springframework.beans.BeanUtils;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Service;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* 中间层 组装请求
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*/
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@Service
19+
public class QuestionService {
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21+
// 注入依赖
22+
@Autowired
23+
private UserMapper userMapper;
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@Autowired
25+
private QuestionMapper questionMapper;
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27+
public List<QuestionDTO> list() {
28+
List<Question> questions = questionMapper.list(); // 查询所有question
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List<QuestionDTO> questionDTOList = new ArrayList<>(); // new list
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for (Question question : questions) { // 循环Question对象
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User user = userMapper.findByID(question.getCreator()); // 用getCreator获取当前User 返回User对象
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QuestionDTO questionDTO = new QuestionDTO();
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BeanUtils.copyProperties(question, questionDTO); // 该工具类的目的是 question的属性快速复制到 questionDTO
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questionDTO.setUser(user); // 返回的DTO对象 需新建list
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questionDTOList.add(questionDTO);
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}
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return questionDTOList; // 返回的 DTOlist
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}
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}

‎src/main/resources/application.properties‎

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spring.datasource.url=jdbc:h2:D:\\Users\\LITSOFT\\IdeaProjects\\SqlDate\\community.db
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spring.datasource.username=root
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spring.datasource.password=123456
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spring.datasource.driver-class-name=org.h2.Driver
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spring.datasource.driver-class-name=org.h2.Driver
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# MyBaits配置
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#开启驼峰标识
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mybatis.configuration.map-underscore-to-camel-case=true

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