Spring boot调用Oracle存储过程的两种方式及完整代码

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

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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