java.sql.SQLException: Invalid value for getInt() - ‘id‘ Query: select ‘id‘,‘username‘,‘password‘,‘e

java.sql.SQLException: Invalid value for getInt() - 'id' Query: select 'id','username','password','email' from t_user where username = ? and password = ? Parameters: [admin, admin]

java.sql.SQLException 

sql 语句有误

经过对比发现这里的sql语句中引号有明显的错误，正确的写法应为

String sql = "select `id`,`username`,`password`,`email` from t_user where username = ? and
password = ?";