嘗試使用C3P0與Hibernate

Question

我使用JPA

，有一個用的persistence.xml以下配置：

<?xml version="1.0" encoding="UTF-8"?> 
<persistence version="2.0" 
    xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence 
http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd "> 


    <persistence-unit name="odontonewPU"> 
     <provider>org.hibernate.ejb.HibernatePersistence</provider> 
     <properties> 
      <property name="hibernate.show_sql" value="true" /> 
      <property name="hibernate.format_sql" value="false" /> 
<!--   <property name="hibernate.hbm2ddl.auto" value="update" /> --> 

      <!-- C3P0 configuration --> 
      <property name="hibernate.connection.provider_class" 
       value="org.hibernate.connection.C3P0ConnectionProvider" /> 

      <property name="hibernate.c3p0.max_size" value="100" /> 
      <property name="hibernate.c3p0.min_size" value="0" /> 
      <property name="hibernate.c3p0.acquire_increment" value="1" /> 
      <property name="hibernate.c3p0.idle_test_period" value="300" /> 
      <property name="hibernate.c3p0.max_statements" value="0" /> 
      <property name="hibernate.c3p0.timeout" value="100" /> 
     </properties> 
    </persistence-unit> 

</persistence> 

的問題是，當我嘗試初始化我的Tomcat我得到了以下錯誤：

691 [Thread-2] ERROR org.hibernate.connection.ConnectionProviderFactory - Could not instantiate connection provider 
java.lang.ClassNotFoundException: org.hibernate.connection.C3P0ConnectionProvider 

在我的pom.xml（我用maven），我有以下依賴性：

<dependency> 
      <groupId>c3p0</groupId> 
      <artifactId>c3p0</artifactId> 
      <version>0.9.1.2</version> 
     </dependency> 

Answer 1

那類是一部分。您需要添加依賴關係

<dependency> 
    <groupId>org.hibernate</groupId> 
    <artifactId>hibernate-c3p0</artifactId> 
    <version>4.2.7.Final</version> 
</dependency> 

或whichever version you need。