示例#1
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 public Classroom getById(int id) {
   return cdao.getById(id);
 }
示例#2
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 public List<Classroom> getAll() {
   return cdao.getAll();
 }
示例#3
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 public int update(Classroom classroom) {
   return cdao.update(classroom);
 }
示例#4
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 public int delete(int id) {
   return cdao.delete(id);
 }
示例#5
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 public int insert(Classroom classroom) {
   return cdao.insert(classroom);
 }