【springboot】springboot 错误集合

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：