前言
因工作需要将公司SSH项目改为Spingboot项目，将项目中部分需要调用存储过程的部分用entityManagerFactory.unwrap(SessionFactory.class).openSession()来获取Session实现后发现项目访问数据库超过十次就会挂掉，原因是Springboot连接池数量默认为10，猜测是每次访问数据库后连接未释放导致的，手动关闭session后问题解决。
解决问题的过程中又发现了另外两种调用方式：
- 直接用EntityManager的createStoredProcedureQuery（）方法调用 （推荐）
-
通过如下方式获取Session来调用，这种方式不需要手动关闭Session来释放连接，具体原因我也没搞明白，有知道的朋友欢迎指点
Session session = entityManager.unwrap(Session.class);
完整代码
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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;@Repositorypublic 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调用存储过程 * * @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, String.class, ParameterMode.OUT); call.registerStoredProcedureParameter(3, String.class, ParameterMode.OUT); call.registerStoredProcedureParameter(4, String.class, ParameterMode.OUT); call.registerStoredProcedureParameter(5, String.class, ParameterMode.OUT); call.registerStoredProcedureParameter(6, String.class, ParameterMode.OUT); call.registerStoredProcedureParameter(7, String.class, ParameterMode.OUT); call.registerStoredProcedureParameter(8, String.class, ParameterMode.OUT); call.registerStoredProcedureParameter(9, String.class, ParameterMode.OUT); call.registerStoredProcedureParameter(10, String.class, 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开启Session调用存储过程 * * @param pay_ID * @return */ public QueryResponse queryBill2(String pay_ID) throws Exception { QueryResponse queryResponse = new QueryResponse(); // 调用完成后需关闭Session否则会出现连接失效 try (Session session = getSession();) { ProcedureCall call = session.createStoredProcedureCall(PSBC_QUERYBILL); call.registerParameter(1, String.class, ParameterMode.IN).bindValue(pay_ID); call.registerParameter(2, String.class, ParameterMode.OUT); call.registerParameter(3, String.class, ParameterMode.OUT); call.registerParameter(4, String.class, ParameterMode.OUT); call.registerParameter(5, String.class, ParameterMode.OUT); call.registerParameter(6, String.class, ParameterMode.OUT); call.registerParameter(7, String.class, ParameterMode.OUT); call.registerParameter(8, String.class, ParameterMode.OUT); call.registerParameter(9, String.class, ParameterMode.OUT); call.registerParameter(10, String.class, 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开启Session调用存储过程 * * @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, String.class, ParameterMode.IN).bindValue(pay_ID); call.registerParameter(2, String.class, ParameterMode.OUT); call.registerParameter(3, String.class, ParameterMode.OUT); call.registerParameter(4, String.class, ParameterMode.OUT); call.registerParameter(5, String.class, ParameterMode.OUT); call.registerParameter(6, String.class, ParameterMode.OUT); call.registerParameter(7, String.class, ParameterMode.OUT); call.registerParameter(8, String.class, ParameterMode.OUT); call.registerParameter(9, String.class, ParameterMode.OUT); call.registerParameter(10, String.class, 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); } }} |
总结
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原文链接：https://www.cnblogs.com/tiro996/p/13485980.html
