epp/Solutions.md

# 遇到的问题及对应的解决方案

### 2022.10

#### 2022.10.22 CRLF换行替换为LF

VSCode：安装 `EditorConfig for VS Code` 插件，然后添加 `.editorconfig` 文件：

```ini
# http://editorconfig.org
root = true

[*]
end_of_line = lf

[*.md]
insert_final_newline = false
trim_trailing_whitespace = false

```

IDEA：File → File Properties → Line Separators → LF - Unix and macOS (\n)

参考：

https://juejin.cn/post/6860322397447258119

https://blog.csdn.net/Li_haiyu/article/details/123852105



#### 2022.10.21 前端 npm run serve 时报错，提示：Module not found: Error: Can't resolve 'element-plus/lib/locale'

```bash
 ERROR  Failed to compile with 1 error

 error  in ./src/plugins/element.js

Module not found: Error: Can't resolve 'element-plus/lib/locale' in 'xxxxxxxx\src\plugins'

ERROR in ./src/plugins/element.js 3:0-45
Module not found: Error: Can't resolve 'element-plus/lib/locale' in 'xxxxxxxx\src\plugins'
 @ ./src/main.js 4:0-51 6:0-18

webpack compiled with 1 error
```

解决方案：

安装`unplugin-vue-components` 和 `unplugin-auto-import`这两款插件

```bash
npm install -D unplugin-vue-components unplugin-auto-import
```

注意：安装时可能还会遇到下面一个错误，可以添加 `--legacy-peer-deps` 参数解决

参考：https://element-plus.gitee.io/zh-CN/guide/quickstart.html#%E6%8C%89%E9%9C%80%E5%AF%BC%E5%85%A5



#### 2022.10.21 前端 npm install 时报错，提示：Conflicting peer dependency: eslint-plugin-vue@7.20.0

```bash
npm ERR! code ERESOLVE
npm ERR! ERESOLVE could not resolve
npm ERR!
npm ERR! While resolving: @vue/eslint-config-standard@6.1.0
npm ERR! Found: eslint-plugin-vue@8.7.1
npm ERR! node_modules/eslint-plugin-vue
npm ERR!   dev eslint-plugin-vue@"^8.0.3" from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer eslint-plugin-vue@"^7.0.0" from @vue/eslint-config-standard@6.1.0    
npm ERR! node_modules/@vue/eslint-config-standard
npm ERR!   dev @vue/eslint-config-standard@"^6.1.0" from the root project
npm ERR!
npm ERR! Conflicting peer dependency: eslint-plugin-vue@7.20.0
npm ERR! node_modules/eslint-plugin-vue
npm ERR!   peer eslint-plugin-vue@"^7.0.0" from @vue/eslint-config-standard@6.1.0  
npm ERR!   node_modules/@vue/eslint-config-standard
npm ERR!     dev @vue/eslint-config-standard@"^6.1.0" from the root project        
npm ERR!
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force, or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.    
npm ERR!
npm ERR! See C:\Users\Coz\AppData\Local\npm-cache\eresolve-report.txt for a full report.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\Coz\AppData\Local\npm-cache\_logs\2022-10-21T07_12_41_027Z-debug-0.log
```

解决方案：

在安装命令后加 `--legacy-peer-deps`

例如：`npm i --legacy-peer-deps`

参考：https://blog.csdn.net/lanmy_dl/article/details/126346812



#### 2022.10.21 后端 项目创建后启动失败，提示：Failed to configure a DataSource: ‘url’ attribute is not specified and no embedded datasource could be configured.

```bash
***************************
APPLICATION FAILED TO START
***************************

Description:

Failed to configure a DataSource: ‘url’ attribute is not specified and no embedded datasource could be configured.

Reason: Failed to determine a suitable driver class

Action:

Consider the following:
If you want an embedded database (H2, HSQL or Derby), please put it on the classpath.
If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active).
```

解决方案：

application.properties 配置文件中添加数据库配置

```bash
# MySQL配置
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/epp?useUnicode=true&characterEncoding=utf8&useSSL=false
spring.datasource.username=root
spring.datasource.password=root
```