錯誤資訊：

A query was run and no Result Maps were found for the Mapped Statement
解決：
使用mybatis進行查詢時，沒有給定resultType值出現的錯誤。resultType是查詢物件的型別。
https://blog.csdn.net/carl_jiang/article/details/53788447

錯誤資訊：

The server time zone value '?й???????' is unrecognized or represents more than one time zone
解決：
在專案程式碼-資料庫連線URL後，加上 （注意大小寫必須一致）
?serverTimezone=UTC

https://www.cnblogs.com/shanelau/p/7041293.html

錯誤資訊：

Could not get JDBC Connection

解決：
${username}的值並不是jdbc.properties檔案中的username值，而是JVM系統環境變數的username。

錯誤資訊：

Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary.

解決：

將com.mysql.jdbc.Driver  改為  com.mysql.cj.jdbc.Driver

錯誤資訊

org.apache.jasper.JasperException: Unable to convert string "${topic.postTime}" to class "java.util.Date" for attribute "value": Property Editor not registered with the PropertyEditorManager 

解決：

在jsp頁面頭加:<%@page isELIgnored="false"%>