Solution:
Modify the mysql configuration file my.ini, open my.ini find the default-charactor-set, changed utf8.
Enter the command line:
show variables like'%char%';
Modify the database code:
set character_set_client=gb2312; set character_set_connection=gb2312; set character_set_results=gb2312;
After changing the coding should look like this:
Query again:
Get.