JDBC插入中文数据出现？号地解决问题

1. 查看jdbc配置是否指定编码

Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/testjdbc","root","123456");

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在原先的配置上指定编码即可?characterEncoding=utf8

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Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/testjdbc?characterEncoding=utf8","root","123456");

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2. 查看mysql数据库及表编码格式是否正常

QQ截图20190510202520.png

上面的即是正确配置，防止中文字符乱码

如果不是的话，需要到my.ini文件中添加或修改

[mysqld]
default_authentication_plugin=mysql_native_password
port = 3306
character_set_server = utf8

重启mysql