ग्रहण में PostgreSQL के साथ हाइबरनेट को कैसे कनेक्ट करें?

Question

मैं पोस्टग्रेएसक्यूएल के साथ हाइबरनेट कनेक्ट करने का प्रयास करता हूं, लेकिन मुझे नहीं पता कि यह क्यों काम नहीं कर रहा है। मैंने सेटिंग के बारे में कई पोस्ट खोजी हैं, लेकिन वे मेरे लिए काम नहीं कर रहे हैं। बहुत बहुत धन्यवाद!

hibernate.cfg.xml

<?xml version="1.0" encoding="utf-8"?> 
<!DOCTYPE hibernate-configuration SYSTEM 
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"> 
<hibernate-configuration> 
    <session-factory> 
    <property name="hibernate.dialect"> 
     org.hibernate.dialect.PostgreSQLDialect 
    </property> 
    <property name="hibernate.connection.driver_class"> 
     org.postgresql.Driver 
    </property> 
    <property name="hibernate.connection.url"> 
     jdbc:postgresql://localhost:5432/hibernatedb 
    </property> 
    <property name="hibernate.connection.username"> 
     eric 
    </property> 
    <property name="hibernate.connection.password"> 
     eric123 
    </property> 

    <mapping resource="Employee.hbm.xml"/> 
</session-factory> 
</hibernate-configuration> 

Employee.hbm.xml

<?xml version="1.0" encoding="utf-8"?> 
<!DOCTYPE hibernate-mapping PUBLIC 
"-//Hibernate/Hibernate Mapping DTD//EN" 
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> 

<hibernate-mapping> 
    <class name="Employee" table="EMPLOYEE"> 
     <meta attribute="class-description"> 
     This class contains the employee detail. 
     </meta> 
     <id name="id" type="int" column="id"> 
     <generator class="native"/> 
     </id> 
     <property name="firstName" column="first_name" type="string"/> 
     <property name="lastName" column="last_name" type="string"/> 
     <property name="salary" column="salary" type="int"/> 
    </class> 
</hibernate-mapping> 

:

नीचे मेरी फ़ाइलों की संरचना है

Employee.java

package hibernate.application; 

    public class Employee { 
     private int id; 
     private String firstName; 
     private String lastName; 
     private int salary; 

     public Employee() {} 
     public Employee(String fname, String lname, int salary) { 
      this.firstName = fname; 
      this.lastName = lname; 
      this.salary = salary; 
     } 
     public int getId() { 
      return id; 
     } 
     public void setId(int id) { 
      this.id = id; 
     } 
     public String getFirstName() { 
      return firstName; 
     } 
     public void setFirstName(String first_name) { 
      this.firstName = first_name; 
     } 
     public String getLastName() { 
      return lastName; 
     } 
     public void setLastName(String last_name) { 
      this.lastName = last_name; 
     } 
     public int getSalary() { 
      return salary; 
     } 
     public void setSalary(int salary) { 
      this.salary = salary; 
     } 
    } 

ManageEmployee.java

public class ManageEmployee { 
    private static SessionFactory factory; 
    private static ServiceRegistry serviceRegistry; 

    public static void main(String[] args) { 
     Configuration configuration = new Configuration(); 
     configuration.configure(); 
     serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();   
     factory = configuration.buildSessionFactory(serviceRegistry); 

     ManageEmployee ME = new ManageEmployee(); 
     Integer empID1 = ME.addEmployee("Zara", "Ali", 1000); 
     ... 
    } 
} 

त्रुटि संदेश

2013/9/26 上午 10:40:56 org.hibernate.annotations.common.Version <clinit> 
INFO: HCANN000001: Hibernate Commons Annotations {4.0.2.Final} 
2013/9/26 上午 10:40:56 org.hibernate.Version logVersion 
INFO: HHH000412: Hibernate Core {4.2.5.Final} 
2013/9/26 上午 10:40:56 org.hibernate.cfg.Environment <clinit> 
INFO: HHH000206: hibernate.properties not found 
2013/9/26 上午 10:40:56 org.hibernate.cfg.Environment buildBytecodeProvider 
INFO: HHH000021: Bytecode provider name : javassist 
2013/9/26 上午 10:40:56 org.hibernate.cfg.Configuration configure 
INFO: HHH000043: Configuring from resource: /hibernate.cfg.xml 
2013/9/26 上午 10:40:56 org.hibernate.cfg.Configuration getConfigurationInputStream 
INFO: HHH000040: Configuration resource: /hibernate.cfg.xml 
2013/9/26 上午 10:40:56 org.hibernate.cfg.Configuration addResource 
INFO: HHH000221: Reading mappings from resource: Employee.hbm.xml 
2013/9/26 上午 10:40:56 org.hibernate.cfg.Configuration doConfigure 
INFO: HHH000041: Configured SessionFactory: null 
2013/9/26 上午 10:40:56 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure 
INFO: HHH000402: Using Hibernate built-in connection pool (not for production use!) 
Exception in thread "main" org.hibernate.service.classloading.spi.ClassLoadingException: Specified JDBC Driver org.postgresql.Driver could not be loaded 
    at org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl.configure(DriverManagerConnectionProviderImpl.java:111) 
    at org.hibernate.service.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:75) 
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:159) 
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:131) 
    at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.buildJdbcConnectionAccess(JdbcServicesImpl.java:223) 
    at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:89) 
    at org.hibernate.service.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:75) 
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:159) 
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:131) 
    at org.hibernate.cfg.Configuration.buildTypeRegistrations(Configuration.java:1818) 
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1776) 
    at hibernate.application.ManageEmployee.main(ManageEmployee.java:18) 
Caused by: org.hibernate.service.classloading.spi.ClassLoadingException: Unable to load class [org.postgresql.Driver] 
    at org.hibernate.service.classloading.internal.ClassLoaderServiceImpl.classForName(ClassLoaderServiceImpl.java:149) 
    at org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl.configure(DriverManagerConnectionProviderImpl.java:106) 
    ... 11 more 
Caused by: java.lang.ClassNotFoundException: org.postgresql.Driver 
    at java.lang.Class.forName(Class.java:172) 
    at org.hibernate.service.classloading.internal.ClassLoaderServiceImpl.classForName(ClassLoaderServiceImpl.java:146) 
    ... 12 more 

Answer 1

मैं अंत में इसे हल करने का रास्ता मिल !!!

मुझे पोस्टग्रेएसक्यूएल (postgresql-9.2-1003.jdbc4.jar) की जेडीबीसी फ़ाइल आयात करना है। यह फ़ाइल ग्रहण को PostGreSQL से कनेक्ट करने का तरीका बता सकती है।

Answer 2

ऐसा लगता है कि आपको अपनी परियोजना में PosgreSQL शामिल करने की आवश्यकता है। मैं मेवेन जैसे गतिशील निर्भरता प्रणाली का उपयोग करने का सुझाव देता हूं, लेकिन आप निश्चित रूप से postgreSQL स्वयं डाउनलोड कर सकते हैं।

How to set up posgreSQL with Maven