Cloning of entity in the "Java" Spring project between classes

Method 1:

"Cloning with spring comes with Beanutils"

"Requirement: the class that needs to be cloned implements the Cloneable interface and overrides the Clone () method"

Example

"Entity:

 Packagecom.agen.orderdiscount.entity;ImportLombok. Allargsconstructor;ImportLombok. Data;ImportLombok. Noargsconstructor;Importlombok.experimental.Accessors;ImportOrg.hibernate.annotations.GenericGenerator;ImportJavax.persistence.Column;Importjavax.persistence.Entity;ImportJavax.persistence.GeneratedValue;Importjavax.persistence.Id;Importjava.util.Date;/*** Estimated amount * The order creation was successfully credited to the estimate amount table *@authorSXD * @date 2018/1/16*/@Data (StaticConstructor= "of") @NoArgsConstructor @allargsconstructor@accessors (Chain=true) @Entity @genericgenerator (name= "Uuid2", strategy = "Org.hibernate.id.UUIDGenerator" ) Public classEsamountImplementscloneable{/*** Estimated ID*/@Id @GeneratedValue (Generator= "Uuid2") @Column (length= 36)    PrivateString Id; /*** The estimated amount of this transfer*/@Column (Nullable=false, precision = 10,scale = 2)    PrivateDouble Esaccount; /*** This time of transfer*/@Column (Nullable=false)    PrivateDate esdate; /*** Order ID*/@Column (Nullable=false)    PrivateInteger orderId; /*** Order number SN*/@Column (Nullable=false, length = 20)    PrivateString ORDERSN; /*** Agency ID*/@Column (Nullable=false)    PrivateInteger Adminid; /*** Product ID*/@Column (Nullable=false)    PrivateInteger productId; /*** Member ID*/@Column (Nullable=false)    PrivateInteger MemberID; /*** Sample Package ID*/@Column (Nullable=false)    PrivateInteger cybid; /*** Operating Source*/@Column (Nullable=false, length = 20)    PrivateString Esoperater; /*** Estimated amount remark 1*/@Column (Length= 500)    PrivateString EsCre1; /*** Estimated amount remark 2*/@Column (Length= 500)    PrivateString EsCre2; @OverrideprotectedObject Clone ()throwsclonenotsupportedexception {return Super. Clone (); }}

View Code

"Use:

Esamount Esamount = Esamountrepository.findesamountbyadminidandorderidandproductid (adminId,orderId,productId) ;                                 if (Objects.nonnull (Esamount)) {                                    //1.1) The record of deduction of the estimated amount to the deductible amount is also recorded in the estimated Amount record table in the                                    new Esamount ();                                    Beanutils.copyproperties (Esamount1,esamount);                                     if (Objects.nonnull (ESAMOUNT1)) {

View Code

Beanutils.copyproperties (Esamount1,esamount); Clone parameter 2 to parameter 1

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Method 2:

"Using java.lang.Serializable for deep cloning"

"Requirements, do not need classes to implement cloneable, just need them to implement java.lang.Serializable."

"Tool class:

ImportJava.io.ByteArrayInputStream;ImportJava.io.ByteArrayOutputStream;Importjava.io.IOException;ImportJava.io.ObjectInputStream;ImportJava.io.ObjectOutputStream; Public Abstract classbeanutil {@SuppressWarnings ("Unchecked")     Public Static<T> t Cloneto (t SRC)throwsruntimeexception {bytearrayoutputstream Memorybuffer=NewBytearrayoutputstream (); ObjectOutputStream out=NULL; ObjectInputStream in=NULL; T Dist=NULL; Try{ out=NewObjectOutputStream (Memorybuffer);            Out.writeobject (SRC);            Out.flush (); Inch=NewObjectInputStream (NewBytearrayinputstream (Memorybuffer.tobytearray ())); Dist=(T) in.readobject (); } Catch(Exception e) {Throw NewRuntimeException (e); } finally {            if(Out! =NULL)                Try{out.close (); out=NULL; } Catch(IOException e) {Throw NewRuntimeException (e); }            if(In! =NULL)                Try{in.close (); Inch=NULL; } Catch(IOException e) {Throw NewRuntimeException (e); }        }        returnDist; }}

View Code

Use

New Administrator (newnewtrue);         = Beanutil.cloneto (SRC);

View Code

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Cloning of entity in the "Java" Spring project between classes