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Java 使用DetachedCriteria分组而不选择列

java hibernate

Java 使用DetachedCriteria分组而不选择列,java,hibernate,projection,detachedcriteria,Java,Hibernate,Projection,Detachedcriteria,如何在不选择列的情况下进行分组 detachedCriteria.setProjection(Projections.groupProperty("col1")); 或 detachedCriteria.setProjection(Projections.sqlGroupProjection("col1", "col1", new String[]{}, new Type[] {Hibernate.INTEGER}));

如何在不选择列的情况下进行分组

detachedCriteria.setProjection(Projections.groupProperty("col1"));
或

detachedCriteria.setProjection(Projections.sqlGroupProjection("col1", "col1", new String[]{}, new Type[] {Hibernate.INTEGER}));