报错如下：
java.sql.SQLException: No suitable driver found for
jdbc:mysql://localhost:3306/shopping_db?useSSL=false&serverTimezone=UTC
at java.sql/java.sql.DriverManager.getConnection(DriverManager.java:706)
at java.sql/java.sql.DriverManager.getConnection(DriverManager.java:229)
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首先检查是否引入正确依赖 mysql-connector-java
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打开project structure
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将mysql-connector-java导入WEB-INF/lib
