Spring boot呼叫Oracle儲存過程的兩種方式及完整程式碼
阿新 • • 發佈:2020-08-17
前言
因工作需要將公司SSH專案改為Spingboot專案,將專案中部分需要呼叫儲存過程的部分用entityManagerFactory.unwrap(SessionFactory.class).openSession()來獲取Session實現後發現專案訪問資料庫超過十次就會掛掉,原因是Springboot連線池數量預設為10,猜測是每次訪問資料庫後連線未釋放導致的,手動關閉session後問題解決。
解決問題的過程中又發現了另外兩種呼叫方式:
- 直接用EntityManager的createStoredProcedureQuery()方法呼叫 (推薦)
- 通過如下方式獲取Session來呼叫,這種方式不需要手動關閉Session來釋放連線,具體原因我也沒搞明白,有知道的朋友歡迎指點
Session session = entityManager.unwrap(Session.class);
完整程式碼
package com.hzjd.produre.repository; import javax.persistence.EntityManager; import javax.persistence.EntityManagerFactory; import javax.persistence.ParameterMode; import javax.persistence.PersistenceContext; import javax.persistence.StoredProcedureQuery; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.procedure.ProcedureCall; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Repository; import com.hzjd.produre.bean.QueryResponse; import com.hzjd.produre.utils.Assistant; @Repository public class ProdureDAO { public final static String PUBLIC_PAG_SYS_GETNEXTID = "PUBLIC_PAG.SYS_GETNEXTID"; public final static String PSBC_QUERYBILL = "PSBCPAY.QUERYBILL"; @PersistenceContext EntityManager entityManager; @Autowired EntityManagerFactory entityManagerFactory; public Session getSession() { return entityManagerFactory.unwrap(SessionFactory.class).openSession(); } /** * 使用entityManager呼叫儲存過程 * * @param pay_ID * @return */ public QueryResponse queryBill1(String pay_ID) throws Exception { QueryResponse queryResponse = new QueryResponse(); StoredProcedureQuery call = entityManager.createStoredProcedureQuery(PSBC_QUERYBILL); call.registerStoredProcedureParameter(1,String.class,ParameterMode.IN).setParameter(1,pay_ID); call.registerStoredProcedureParameter(2,ParameterMode.OUT); call.registerStoredProcedureParameter(3,ParameterMode.OUT); call.registerStoredProcedureParameter(4,ParameterMode.OUT); call.registerStoredProcedureParameter(5,ParameterMode.OUT); call.registerStoredProcedureParameter(6,ParameterMode.OUT); call.registerStoredProcedureParameter(7,ParameterMode.OUT); call.registerStoredProcedureParameter(8,ParameterMode.OUT); call.registerStoredProcedureParameter(9,ParameterMode.OUT); call.registerStoredProcedureParameter(10,ParameterMode.OUT); call.execute(); queryResponse.getBody().setPAY_ID(pay_ID); queryResponse.getBody().setCUSTNAME(Assistant.nullToEmpty(call.getOutputParameterValue(2))); queryResponse.getBody().setHOME_ADDR(Assistant.nullToEmpty(call.getOutputParameterValue(3))); queryResponse.getBody().setTRAN_AMT(Assistant.nullToEmpty(call.getOutputParameterValue(5))); queryResponse.getBody().setTOTAL_AMT(Assistant.nullToEmpty(call.getOutputParameterValue(6))); queryResponse.getBody().setBALANCE(Assistant.nullToEmpty(call.getOutputParameterValue(8))); int errorcode = Assistant.nullToInt(call.getOutputParameterValue(9)); String errormsg = Assistant.nullToEmpty(call.getOutputParameterValue(10)); if (errorcode == 0) { return queryResponse; } else { throw new Exception(errormsg); } } /** * 使用sessionFactory開啟Session呼叫儲存過程 * * @param pay_ID * @return */ public QueryResponse queryBill2(String pay_ID) throws Exception { QueryResponse queryResponse = new QueryResponse(); // 呼叫完成後需關閉Session否則會出現連線失效 try (Session session = getSession();) { ProcedureCall call = session.createStoredProcedureCall(PSBC_QUERYBILL); call.registerParameter(1,ParameterMode.IN).bindValue(pay_ID); call.registerParameter(2,ParameterMode.OUT); call.registerParameter(3,ParameterMode.OUT); call.registerParameter(4,ParameterMode.OUT); call.registerParameter(5,ParameterMode.OUT); call.registerParameter(6,ParameterMode.OUT); call.registerParameter(7,ParameterMode.OUT); call.registerParameter(8,ParameterMode.OUT); call.registerParameter(9,ParameterMode.OUT); call.registerParameter(10,ParameterMode.OUT); queryResponse.getBody().setPAY_ID(pay_ID); queryResponse.getBody().setCUSTNAME(Assistant.nullToEmpty(call.getOutputs().getOutputParameterValue(2))); queryResponse.getBody().setHOME_ADDR(Assistant.nullToEmpty(call.getOutputs().getOutputParameterValue(3))); queryResponse.getBody().setTRAN_AMT(Assistant.nullToEmpty(call.getOutputs().getOutputParameterValue(5))); queryResponse.getBody().setTOTAL_AMT(Assistant.nullToEmpty(call.getOutputs().getOutputParameterValue(6))); queryResponse.getBody().setBALANCE(Assistant.nullToEmpty(call.getOutputs().getOutputParameterValue(8))); int errorcode = Assistant.nullToInt(call.getOutputs().getOutputParameterValue(9)); String errormsg = Assistant.nullToEmpty(call.getOutputs().getOutputParameterValue(10)); if (errorcode == 0) { return queryResponse; } else { throw new Exception(errormsg); } } } /** * 使用sessionFactory開啟Session呼叫儲存過程 * * @param pay_ID * @return */ public QueryResponse queryBill3(String pay_ID) throws Exception { QueryResponse queryResponse = new QueryResponse(); Session session = entityManager.unwrap(Session.class); ProcedureCall call = session.createStoredProcedureCall(PSBC_QUERYBILL); call.registerParameter(1,ParameterMode.IN).bindValue(pay_ID); call.registerParameter(2,ParameterMode.OUT); call.registerParameter(3,ParameterMode.OUT); call.registerParameter(4,ParameterMode.OUT); call.registerParameter(5,ParameterMode.OUT); call.registerParameter(6,ParameterMode.OUT); call.registerParameter(7,ParameterMode.OUT); call.registerParameter(8,ParameterMode.OUT); call.registerParameter(9,ParameterMode.OUT); call.registerParameter(10,ParameterMode.OUT); queryResponse.getBody().setPAY_ID(pay_ID); queryResponse.getBody().setCUSTNAME(Assistant.nullToEmpty(call.getOutputs().getOutputParameterValue(2))); queryResponse.getBody().setHOME_ADDR(Assistant.nullToEmpty(call.getOutputs().getOutputParameterValue(3))); queryResponse.getBody().setTRAN_AMT(Assistant.nullToEmpty(call.getOutputs().getOutputParameterValue(5))); queryResponse.getBody().setTOTAL_AMT(Assistant.nullToEmpty(call.getOutputs().getOutputParameterValue(6))); queryResponse.getBody().setBALANCE(Assistant.nullToEmpty(call.getOutputs().getOutputParameterValue(8))); int errorcode = Assistant.nullToInt(call.getOutputs().getOutputParameterValue(9)); String errormsg = Assistant.nullToEmpty(call.getOutputs().getOutputParameterValue(10)); if (errorcode == 0) { return queryResponse; } else { throw new Exception(errormsg); } } }
總結
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