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                            ## hibernate持久化類規范
1. 需要提供一個無參的構造方法,hibernate是通過無參構造器來實例化對象的.
2. 所有屬性都要私有化.
3. 需要對外提供get/set方法.
4. 基本類型(int)和包裝類型(integer),建議全部包裝類型.
5. 持久化類不能被final修飾,如果被final修飾了hibernate優化手段就失效,延遲加載就編程立即加載. load查詢返回的是代理對象,而這個代理對象是持久化類的子類生出來的.                              cus.getClass().getSuperclass()     可以看到被代理的類的父類.
6. 持久化類必須要有標識屬性(OID屬性),hibernate就是用OID屬性來區分兩個對象是否同一個. 標識屬性就是與表主鍵創建了關系的屬性,我們就可以把該屬性稱作OID(標識屬性).




                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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