人人前端平台安装错误

背景

根据朋友介绍，知道了人人前端平台能够节省CRUD的开发难度，所以进行了研究，网上有安装说明，也不麻烦，但是我在处理时遇到了一些错误，解决错误的心得写这里。

 

错误: 找不到或无法加载主类 RenrenApplication

 

"E:\Program Files\JetBrains\IntelliJ IDEA 2020.3.2\jbr\bin\java.exe" "-javaagent:E:\Program Files\JetBrains\IntelliJ IDEA 2020.3.2\lib\idea_rt.jar=10983:E:\Program Files\JetBrains\IntelliJ IDEA 2020.3.2\bin" -Dfile.encoding=UTF-8 RenrenApplication
错误: 找不到或无法加载主类 RenrenApplication
原因: java.lang.ClassNotFoundException: RenrenApplication

Process finished with exit code 1
加载时src目录在exclude范围内，去掉就可以了。
Maven reload以后多了个target目录，影响使用。

 

java: 程序包org.springframework.boot.test.context不存在

maven sync下，问题解决。

数据库连接异常

2021-06-09 10:00:06.195 ERROR 4592 --- [eate-1938446408] com.alibaba.druid.pool.DruidDataSource   : create connection SQLException, url: jdbc:mysql://localhost:3306/renren_fast?useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai, errorCode 1045, state 28000

java.sql.SQLException: Access denied for user 'renren'@'localhost' (using password: YES)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:129)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97)
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:122)
at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:827)
at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:447)
at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:237)
at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:199)
at com.alibaba.druid.filter.FilterChainImpl.connection_connect(FilterChainImpl.java:156)
at com.alibaba.druid.filter.FilterAdapter.connection_connect(FilterAdapter.java:786)
at com.alibaba.druid.filter.FilterChainImpl.connection_connect(FilterChainImpl.java:150)
at com.alibaba.druid.filter.stat.StatFilter.connection_connect(StatFilter.java:218)
at com.alibaba.druid.filter.FilterChainImpl.connection_connect(FilterChainImpl.java:150)
at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1572)
at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1636)
上次改了用户名密码，这次代码覆盖后忘记改了。

前端安装

网上经常介绍的模式我没用，用官网说的cnpm安装好用。

前端需要： Python2.7 node.js 8.10。高版本不支持，记清楚。
# 安装依赖
# 1
npm install -g cnpm --registry=https://registry.npm.taobao.org
# 2
cnpm install
#如果提示一个文件存在，删除继续。
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.9: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! node-sass@4.13.1 postinstall: `node scripts/build.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the node-sass@4.13.1 postinstall script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\Administrator\AppData\Roaming\npm-cache\_logs\2021-06-09T01_03_30_560Z-debug.log

H:\人人\renren-fast-vue>npm install -g cnpm --registry=https://registry.npm.taobao.org
npm WARN deprecated request@2.88.2: request has been deprecated, see https://github.com/request/request/issues/3142
npm WARN deprecated har-validator@5.1.5: this
npm ERR! path C:\Users\Administrator\AppData\Roaming\npm\cnpm.cmd
npm ERR! code EEXIST
npm ERR! Refusing to delete C:\Users\Administrator\AppData\Roaming\npm\cnpm.cmd: is outside C:\Users\Administrator\AppData\Roaming\npm\node_modules\cnpm and not a link
npm ERR! File exists: C:\Users\Administrator\AppData\Roaming\npm\cnpm.cmd
npm ERR! Move it away, and try again.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\Administrator\AppData\Roaming\npm-cache\_logs\2021-06-09T01_04_14_019Z-debug.log

H:\人人\renren-fast-vue>del  C:\Users\Administrator\AppData\Roaming\npm\cnpm.cmd
# 启动服务
npm run dev