目录
Maven Install报错：Perhaps you are running on a JRE rather than a JDK?
解决：The declared package does not match the expected package
PathVariable cannot be resolved to a type
java.sql.SQLException: Access denied for user 'root'@'localhost错误
1、密码未加引号：https://blog.csdn.net/xiaolinnulidushu/article/details/99065212
2、时区不一致：加红色的那一串
url: jdbc:mysql://localhost:3306/demo_test?useUnicode=true&characterEncoding=utf8&allowMultiQueries=true&user=root&password=root&useSSL=true&serverTimezone=UTC
Maven Install报错：Perhaps you are running on a JRE rather than a JDK?
原文连接：https://www.jianshu.com/p/1ed0ec397575
所遇问题：
英文描述：
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.5.1:compile (default-compile) on project busiservice: Compilation failure
[ERROR] No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?
中文描述：此环境中未提供编译器，你可能使用jre运行而不是jdk。引发原因：Eclipse默认在jre上运行，maven install 编译需要jdk中的编译器，而jre中并没有问题解决：
Window->Preferences
Java->Installed Rres->Add
Directory...
jdk->ok
Java->Installed JREs->Execution Environments->JavaSE-1.7->jdk1.x
Java->Installed JREs->Execution Environments->JavaSE-1.8->jdk1.x
maven->install(编译成功)
作者：_向太阳_
链接：https://www.jianshu.com/p/1ed0ec397575
来源：简书
著作权归作者所有。商业转载请联系作者获得授权，非商业转载请注明出处。
解决：The declared package does not match the expected package
https://blog.csdn.net/weixin_34150224/article/details/91932452
PathVariable cannot be resolved to a type
点击PathVariable，在弹出的窗口，点击import PathVariable…… 插入对应的包即可
