softtech computer education: spring data jpa onetomany example

spring data jpa onetomany example:
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JAVA-SERVLETS JAVA-JDBC JAVA-JSP HIBERNATE-SHCEMABASED

HIBERNATE-ANNOTATIONS SPRING-IOC SPRING –AOP-SCHEMABASED

SPRING-AOP-ANNOTATIONS SPRING -DAO SPRIN-MVC SPRING-SECUTITY

SPRING-DATA-JPA REST-WEB-SERVICE STRUTS2HIBERNATE GWT....

NOTE: 1) maven dependeccy pom.xml , we can get from previous example.
2) presestance.xml , beans.xml file also we can get from my previous example program.

Dept .java
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package repository;

import java.util.HashSet;

import java.util.Set;

import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.Table;

import org.springframework.data.jpa.domain.AbstractPersistable;

@Entity
@Table(name="dept")
public class Dept {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private Long deptno;
private String dname;
private String loc;
@OneToMany(mappedBy = "dept")
private Set<Employee> employees=new HashSet<Employee>(0);
public Long getDeptno() {
return deptno;
}

public Set<Employee> getEmployees() {
return employees;
}

public void setEmployees(Set<Employee> employees) {
this.employees = employees;
}

public void setDeptno(Long deptno) {
this.deptno = deptno;
}
public String getDname() {
return dname;
}
public void setDname(String dname) {
this.dname = dname;
}
public String getLoc() {
return loc;
}
public void setLoc(String loc) {
this.loc = loc;
}

}

Employee .java
---------------

package repository;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
public interface DeptRepository extends JpaRepository<Dept, Long>,JpaSpecificationExecutor<Dept>{

}

Employee .java
----------------

package repository;

import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
import org.springframework.data.jpa.domain.AbstractPersistable;
@Entity
@Table(name="employee2")
public class Employee extends AbstractPersistable<Long>{

private String ename;

@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "deptno")
private Dept dept;
public Dept getDept() {
return dept;
}
public void setDept(Dept dept) {
this.dept = dept;
}
public String getEname() {
return ename;
}
public void setEname(String ename) {
this.ename = ename;
}
}

EmployeeRepository .java
--------------------------

package repository;

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.JpaSpecificationExecutor;

public interface EmployeeRepository extends JpaRepository<Employee, Long>,
JpaSpecificationExecutor<Employee>{

}

TestCase .java
---------------

package madhav;
import repository.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
@Service
public class TestCase {

@Autowired
private DeptRepository DeptRepository;
@Autowired
private EmployeeRepository EmployeeRepository;

@Transactional
public void createEmployee() {

try
{

Dept dept = new Dept();
dept.setDname("hugo");
dept.setLoc("hyd");

DeptRepository.save(dept);

Employee emp1 = new Employee();
emp1.setEname("madhav");
emp1.setDept(dept);

Employee emp2 = new Employee();
emp2.setEname("narendar");
emp2.setDept(dept);
EmployeeRepository.save(emp1);
EmployeeRepository.save(emp2);

}
catch(Exception ex)
{

}
}

public DeptRepository getDeptRepository() {
return DeptRepository;
}

public void setDeptRepository(DeptRepository deptRepository) {
DeptRepository = deptRepository;
}

public EmployeeRepository getEmployeeRepository() {
return EmployeeRepository;
}

public void setEmployeeRepository(EmployeeRepository employeeRepository) {
EmployeeRepository = employeeRepository;
}

}

Test.java
---------------

package madhav;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Test {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
ApplicationContext ctx=new ClassPathXmlApplicationContext("beans.xml");

Object tc=(Object)ctx.getBean("testCase");
TestCase g=(TestCase)tc;
g.createEmployee();
}

}

output from console:
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