MyBatis BULK Insert Oracle Large data logging performance Problem Resolution __oracle

Environment: MyBatis + oracle11g R2

1. Use Direct path insertion ("/*+append_values/" in the following SQL statement) and use the keyword "union ALL":

<insert id= "Adduidcodebatch"  parametertype= "java.util.List" >  
    INSERT INTO/*+append_values * * T_
        Uid_code (C_uid_code,
		         C_serail_len,
		         c_batch_code, C_type, C_create_time,
		         c_super_code
		         , C_security_code,
		         c_serial_code
		         )
       <foreach collection= "list" item= "item" index= "index" separator= " UNION ALL ">  
		  select #{item.uidcode},
		         #{item.kcode},      
		         #{item.batchcode},
		         #{item.type},
		         Sysdate,
		         #{item.supercode},
		         #{item.securitycode},
		         #{item.serialcode} from
		  dual
       </ Foreach>  
    </insert>  

2.dao layer implementation: Before a one-time commit, this will increase the number of inserts, the execution rate is suddenly slow, so should be inserted in batches:

	public void Save (list<uidcodebean> uidcodelist) throws Exception {sqlsession = null; try {batchsqlsession = Sqlsessionfactory.opensession (Executortype.batch, false);//Get the sqlsession int Batchcoun of the batch method t = 1000;//Number of commits per batch int batchlastindex = batchcount-1;//subscript for the last of each batch (int index = 0; index < Uidcodelist.siz
					E ()-1;) {if (Batchlastindex > Uidcodelist.size ()-1) {Batchlastindex = Uidcodelist.size ()-1;
					Batchsqlsession.insert (namespace+ ". Adduidcodebatch", Uidcodelist.sublist (Index, batchlastindex));
					Batchsqlsession.commit ();
					System.out.println ("Index:" +index+ "Batchlastindex:" +batchlastindex); break;//data is inserted, exit cycle}else{Batchsqlsession.insert (namespace+ ". Adduidcodebatch", Uidcodelist.sublist (Index,					                Batchlastindex));
					Batchsqlsession.commit ();
					System.out.println ("Index:" +index+ "Batchlastindex:" +batchlastindex); index = Batchlastindex + 1;//Set next batch subscript BatchlasTindex = index + (batchCount-1);
		}}finally{Batchsqlsession.close (); }		
	}