Questions about MySQL encoding

Today I am from 7 o'clock in the evening to the next day now, in order to solve a MySQL coding problem, the problem is described, the received Chinese parameters in the Java class sysout is normal, but in the execution of SQL all become the??? , I began to think is not received is not utf8, but sysout out is Chinese, certainly not this problem, so has been looking for solutions, I modified the MyEclipse workspace character set for UTF-8, but the problem still exists, I found the online post, By executing the Set Character_set_results=utf8 method in MySQL, the character set of the database is UTF8, and the result of the modification is viewed through show variables like ' char% ', the result is indeed modified. But I went to execute the code, the problem is still, looking for a long time, found just using the Set method is only the session level of modification, MySQL restarted after the failure, and then found in the My.ini configuration file inside the specified character set method, MySQL startup to read this file, the final modification success

Questions about MySQL encoding