@GetMapping("/insert")

public StuStdent insert() {

StuStdent stustudent =new StuStdent();

stustudent.setStuName("aaa");

StuStdent nstustudent  =stuStdentDao.saveAndFlush(stustudent);

return nstustudent;

}

@GetMapping("/delete")

public String delete(){

StuStdent stustudent =new StuStdent();

stuStdentDao.delete(stustudent);

return "OK";

}

@GetMapping("/update")

public StuStdent update(int id){

StuStdent stustudent =stuStdentDao.findById(id).get();

stustudent.setStuSex("0");

stuStdentDao.save(stustudent);

return stustudent;

}

@GetMapping("/select")

public  List select(){

List stustudent =new ArrayList<>();

stustudent =stuStdentDao.findAll();

return stustudent;

}