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休眠预测我有一个包含从该表下列字段为弹簧引导应用
|id|feedback_status|financial_year|attendence|behaviour|total_feedback|user_id|total_behaviour|
荫取feedback_status和total_feedback的表,并返回作为使用JSON数据有突起和projectionlist冬眠。
List<StudentFeedback> results = null;
Session session = getSession();
Criteria criteria = session.createCriteria(StudentFeedback.class);
ProjectionList projlist = Projections.projectionList();
projlist.add(Projections.property("totalFeedback").as("qty"));
projlist.add(Projections.groupProperty("feedbackStatus").as("feedName"));
criteria.setProjection(projlist);
criteria.setResultTransformer(Transformers.ALIAS_TO_ENTITY_MAP);
results = criteria.list();
}
return GsonUtils.toGson(results);
}
我feedback_status和total_feedback包含下列值
|feedback_status| |total_feedback |
Excellent 23
Average 11
Poor 12
Good 13
Poor 12
所以,问题是无论何时返回JSON,它打印feedback_status
值poor
两次,我想一次印刷只值并且如果它发生多于一次,则总结对应于feedback_status
的total_feedback
并返回到单个。
你好兄弟得到了答案, 你可以尝试使用.setProjection(Projections.countDistinct( “feedback_status”) ); 例如:标准条件= createCriteria(values).setProjection(Projections.countDistinct(“feedback_status”)); – Pradeep
@PradeepCG对于打印出来的结果很有帮助,因为total_feedback? – BeginnerBro
嘿,你需要使用总和与计数限制,请检查这些链接 http://stackoverflow.com/questions/23044565/count-with-other-fields-in-group-by-with-hibernate http: //stackoverflow.com/questions/23044565/count-with-other-fields-in-group-by-with-hibernate – Pradeep