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cannot insert record in MS SQLServer 2000

 
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hibernate version: 3.x
database: MS SQL Server 2000

cfg.xml
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">com.microsoft.jdbc.sqlserver.SQLServerDriver</property>
<property name="hibernate.connection.url">jdbc:microsoft:sqlserver://localhost:1433;databaseName=hibernatetutorialSQLServer</property>
<property name="hibernate.connection.username">sa</property>
<property name="hibernate.connection.password">sa</property>
<property name="hibernate.connection.pool_size">10</property>
<property name="show_sql">true</property>
<property name="dialect">org.hibernate.dialect.SQLServerDialect</property>
<property name="hibernate.hbm2ddl.auto">update</property>
<!-- Mapping files -->
<mapping resource="contact.hbm.xml"/>
</session-factory>
</hibernate-configuration>

hbm.xml
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="roseindia.tutorial.hibernate.Contact" table="CONTACT">
<id name="id" type="int" column="ID" >
<generator class="assigned"/>
</id>

<property name="firstName">
<column name="FIRSTNAME" />
</property>
<property name="lastName">
<column name="LASTNAME"/>
</property>
<property name="email">
<column name="EMAIL"/>
</property>
</class>
</hibernate-mapping>

.java file
package roseindia.tutorial.hibernate;

/**
* @author Deepak Kumar
*
* http://www.roseindia.net
* Java Class to map to the datbase Contact Table
*/
public class Contact {
private String firstName;
private String lastName;
private String email;
private int id;

/**
* @return Email
*/
public String getEmail() {
return email;
}

/**
* @return First Name
*/
public String getFirstName() {
return firstName;
}

/**
* @return Last name
*/
public String getLastName() {
return lastName;
}

/**
* @param string Sets the Email
*/
public void setEmail(String string) {
email = string;
}

/**
* @param string Sets the First Name
*/
public void setFirstName(String string) {
firstName = string;
}

/**
* @param string sets the Last Name
*/
public void setLastName(String string) {
lastName = string;
}

/**
* @return ID Returns ID
*/
public int getId() {
return id;
}

/**
* @param l Sets the ID
*/
public void setId(int l) {
id = l;
}

}

table structure:
id int 4
FIRSTNAME nvarchar(50)
LASTNAME nvarchar(50)
EMAIL nvarchar(50)

in eclipse, everything go right and the sql is shown correctly
Hibernate: insert into CONTACT (FIRSTNAME, LASTNAME, EMAIL, ID) values (?, ?, ?, ?)

in sql profiler, the statement is
exec sp_executesql N'insert into CONTACT (FIRSTNAME, LASTNAME, EMAIL, ID) values (@P1, @P2, @P3, @P4)', N'@P1 nvarchar(4000) ,@P2 nvarchar(4000) ,@P3 nvarchar(4000) ,@P4 int ', N'Deepak', N'Kumar', N'deepak_38@yahoo.com', 6

I try to run this statement in sql analyzer and it really can create a record.
but if just run in eclipse, no exception, the sql is shown, but no record is added in the table!!
what is the problem??
 
peter tong
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I find the solution by myself finally.
need to use transaction, seesion.flush is not enough!!

Transaction tx;
tx = session.beginTransaction();
System.out.println("Inserting Record");
Contact contact = new Contact();
contact.setId(7);
contact.setFirstName("Deepak");
contact.setLastName("Kumar");
contact.setEmail("deepak_38@yahoo.com");
session.persist(contact);
//session.flush();
tx.commit();
 
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