evolve(hibernate): @manytomany create demo

hb-05-many-to-many/src/com/luv2code/hibernate/demo/CreateCourseAndStudentsDemo.java

@@ -0,0 +1,71 @@
+package com.luv2code.hibernate.demo;
+
+import com.luv2code.hibernate.demo.entity.*;
+import org.hibernate.Session;
+import org.hibernate.SessionFactory;
+import org.hibernate.cfg.Configuration;
+
+public class CreateCourseAndStudentsDemo {
+
+    public static void main(String[] args) {
+
+        // create session factory
+        SessionFactory factory = new Configuration()
+                                    .configure("hibernate.cfg.xml")
+                                    .addAnnotatedClass(Instructor.class)
+                                    .addAnnotatedClass(InstructorDetail.class)
+                                    .addAnnotatedClass(Course.class)
+                                    .addAnnotatedClass(Review.class)
+                                    .addAnnotatedClass(Student.class)
+                                    .buildSessionFactory();
+
+        // create session
+        Session session = factory.getCurrentSession();
+
+        try {
+            // start transaction
+            session.beginTransaction();
+
+            // create a course
+            Course course = new Course("Pacman - How to Scorce One Million Points");
+
+
+            // save the course ... and leverage the cascade all :-)
+            System.out.println("Saving the course");
+            System.out.println(course);
+            session.save(course);
+            System.out.println("Saved the course.");
+
+            // create students
+            Student stu1 = new Student("John", "Doe", "john@gmail.com");
+            Student stu2 = new Student("Mary", "Public", "mary@gmail.com");
+
+            // add students to course
+            course.addStduent(stu1);
+            course.addStduent(stu2);
+
+            // save the students
+            System.out.println("Saving students...");
+            System.out.println(stu1);
+            System.out.println(stu2);
+            session.save(stu1);
+            session.save(stu2);
+            System.out.println("Saved students: " + course.getStudents());
+
+            // commit
+            session.getTransaction().commit();
+
+            System.out.println("DONE!");
+
+        } catch (Exception e) {
+            e.printStackTrace();
+        } finally {
+
+            // add clean up code
+            session.close();
+            factory.close();
+        }
+
+    }
+
+}

hb-05-many-to-many/src/com/luv2code/hibernate/demo/entity/Course.java

@@ -35,8 +35,8 @@ public class Course {
             cascade = { CascadeType.DETACH, CascadeType.MERGE, CascadeType.PERSIST, CascadeType.REFRESH })
     @JoinTable(
             name="course_student",
-            joinColumns=@JoinColumn("course_id"),
-            inverseJoinColmns=@JoinColumn("stduent_id")
+            joinColumns=@JoinColumn(name="course_id"),
+            inverseJoinColumns=@JoinColumn(name="student_id")
     )
     private List<Student> students;
 

hb-05-many-to-many/src/com/luv2code/hibernate/demo/entity/Student.java

@@ -26,8 +26,8 @@ public class Student {
             cascade = { CascadeType.DETACH, CascadeType.MERGE, CascadeType.PERSIST, CascadeType.REFRESH })
     @JoinTable(
             name="course_student",
-            joinColumns=@JoinColumn("student_id"),
-            inverseJoinColmns=@JoinColumn("course_id")
+            joinColumns=@JoinColumn(name="student_id"),
+            inverseJoinColumns=@JoinColumn(name="course_id")
     )
     private List<Course> courses;