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mysql 錯 Could not open JDBC Connection for transaction; nested exception is java.sql.SQLExceptio

本文轉載自   查看原文   2021-06-14 01:29   5814    Java_Web

我的報錯的原因是數據庫連接失敗。

（一般項目等好長時間才報錯就是沒連上數據庫，因為沒連上數據庫需要等幾秒才會報錯

 

1、檢查用戶名密碼錯誤沒（很少人犯這種錯誤

2、數據庫依賴的jar包，現在好多人看視頻學習，其實有的jar包更新好快，用之前的jar包不能連接現在高版本數據庫（我就是這個原因

<dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>8.0.15</version>
            </dependency>

 

看一下自己mysql數據庫版本，上網找一下對應的jar包

 


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