String sql=“select * from list where list_name=’”+中文变量名+"’";
//查询中文变量
String sql=“select * from list where list_id=”+ccc;
//查询数值型变量
String sql=“select * from list where list_name=’”+中文变量名+"’";
//查询中文变量
String sql=“select * from list where list_id=”+ccc;
//查询数值型变量