I am developing using framework of struts2, spring and hibernate. I used HibernateTemplate of spring. In return data to view by using JSON of struts2 got error (Proxy is detached (i.e session is null)...) in that case when I used struts default method is no error.
Here is my applicationContext file:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xmlns:c="http://www.springframework.org/schema/c" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:jdbc="http://www.springframework.org/schema/jdbc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/jdbc
http://www.springframework.org/schema/jdbc/spring-jdbc-3.1.xsd">
<!-- Hibernate Configuration -->
<!-- <mvc:resources mapping="/style/**" location="/style/"/> -->
<context:annotation-config />
<context:component-scan base-package="com.SSH" />
<tx:annotation-driven transaction-manager="transactionManager" />
<bean
class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor" />
<bean id="transactionManager"
class="org.springframework.orm.hibernate4.HibernateTransactionManager"
p:sessionFactory-ref="sessionFactory" />
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource"
p:driverClassName="com.mysql.jdbc.Driver" p:url="jdbc:mysql://localhost:3306/SSH"
p:username="root" p:password="root" />
<bean id="sessionFactory"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="mappingResources">
<list>
<value>com/SSH/xml/Phone.hbm.xml</value>
<value>com/SSH/xml/ExamType.hbm.xml</value>
<value>com/SSH/xml/Mark.hbm.xml</value>
<value>com/SSH/xml/Subject.hbm.xml</value>
<value>com/SSH/xml/Address.hbm.xml</value>
<value>com/SSH/xml/Classes.hbm.xml</value>
<value>com/SSH/xml/Contact.hbm.xml</value>
<value>com/SSH/xml/Exam.hbm.xml</value>
<value>com/SSH/xml/Student.hbm.xml</value>
<value>com/SSH/xml/Teacher.hbm.xml</value>
<!-- any more table -->
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.format_sql">true</prop>
<prop key="hibernate.hbm2ddl.auto">create-drop</prop>
</props>
</property>
</bean>
<bean id="hibernateTemplate" class="org.springframework.orm.hibernate4.HibernateTemplate">
<property name="sessionFactory" ref="sessionFactory"></property>
</bean>
Here is my implementation class:
import org.hibernate.Hibernate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.orm.hibernate4.HibernateTemplate;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.transaction.annotation.Propagation;
import com.SSH.Model.Contact;
import com.SSH.Model.Phone;
import com.SSH.Services.ContactService;
@Service("ContactService")
@Transactional(propagation=Propagation.REQUIRED)
public class ContactTemplate implements ContactService{
@Autowired
HibernateTemplate hibernateTemplate;
@Override
public Contact getContact() {
// TODO Auto-generated method stub
Contact contact = hibernateTemplate.get(Contact.class, new Long("1"));
Hibernate.initialize(contact.getAddress());
Hibernate.initialize(contact.getPhone());
return contact;
}
@Override
public void setContact(Contact contact) {
// TODO Auto-generated method stub
hibernateTemplate.save(contact);
}
}
Here is my action class:
import java.util.HashSet;
import java.util.Set;
import org.hibernate.Hibernate;
import org.springframework.beans.factory.annotation.Autowired;
import com.SSH.Model.Address;
import com.SSH.Model.Contact;
import com.SSH.Model.Phone;
import com.SSH.Services.ContactService;
import com.opensymphony.xwork2.ActionSupport;
public class Main extends ActionSupport{
/**
*
*/
private static final long serialVersionUID = 1L;
@Autowired
private ContactService contactService;
private Contact result = new Contact();
public String welcome(){
Set<Phone> phoneSet = new HashSet<Phone>();
Phone phone = new Phone(80, 12345);
phoneSet.add(phone);
Address address = new Address();
address.setCity("Yangon");
address.setStreet("Kyan Sis Thar");
address.setHomeNo("S20");
Contact contact = new Contact(address, phoneSet);
contactService.setContact(contact);
result = contactService.getContact();
return SUCCESS;
}
public Contact getResult() {
return result;
}
public void setResult(Contact result) {
this.result = result;
}
}
Here is my struts.xml file:
<package name="default" extends="struts-default,json-default" namespace="/">
<action name="welcome" class="com.SSH.Action.Main" method="welcome">
<result name="success">/view/welcome.jsp</result> // this struts result type is OK
</action>
</package>
This is JSON result type:
<package name="default" extends="struts-default,json-default" namespace="/">
<action name="welcome" class="com.SSH.Action.Main" method="welcome">
<result type="json" />// this type got error
</action>
</package>
My error screen shot:
Pls, thanks.
