Unknown character set index for field '255' received from server.
MySQL 換成 8.0后，Java JDBC jar包版本過低 需升級jar包----->mysql-connector-java-5.1.46.jar或者更高，根據mysql版本決定 ...
原文：【java報錯】Unknown character set index for field '224' received from server.
MYSQL . 之前， UTF 編碼只支持 個字節 從MYSQL . 開始，可支持 個字節UTF編碼utf mb 如emoji表情需要使用utf mb 如果服務器級使用的編碼是utf mb 在客戶端鏈接后使用sql語句show variables like char 可查看所有編碼 ，而mysql的jar包低版本不支持utf mb ,連接時報錯 Unknown character set ind ...
2018-05-22 14:31 0 1218 推薦指數：
相關推薦
Unknown initial character set index '255' received from server. Initial client character set can be
mysql的連接錯誤，在網上查找到是編碼不匹配的原因， 直接在連接的URL后加上?useUnicode=true&characterEncoding=utf8就可以了 ...
Unknown initial character set index '255' received from server. Initial client character 解決方法
Unknown initial character set index '255' received from server. Initial client character set can be forced via the 'characterEncoding' property. 從錯誤 ...
關於Javaweb中報錯信息Cause: java.sql.SQLException: Unknown initial character set index '255' received from server.解決辦法
這個報錯信息意思是咱們的MySql和一個叫做mysql-connector-java包不匹配 一般來說5.1匹配的是mysql8.0以下的版本 8.0版本的mysql-connector-java才是匹配MySql的8.0版本 下面是最新8.0jar包有需要的自取 鏈接 提取 ...
java.sql.SQLException: Unknown initial character set index '255' received from server. Initial client character set can be forced via
解決方案： 首先查看數據庫的版本號，刪除舊的jar包，將mysql-connector-java.jar更換成對應版本號 同時在連接數據庫的url后加上?useUnicode=true&characterEncoding=utf-8 ...
Exception in thread "main" java.sql.SQLException: Unknown initial character set index '255' received from server. Initial client character set can
解決方法： ?useUnicode=true&characterEncoding=utf-8 在url路徑上加上這句話 ...
Unknown initial character set index '255' received from server
剛學mybatis，測試的時候有異常： 去檢查數據庫的數據，有漢字 就在url后面加上了"?characterEncoding=utf8"之后就可以正常顯示了。 ...
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
在鏈接數據庫的時候，報錯如下： The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. 上網 ...