{"id":503,"date":"2014-08-06T14:34:55","date_gmt":"2014-08-06T14:34:55","guid":{"rendered":"http:\/\/codethataint.com\/blog\/?p=503"},"modified":"2016-06-13T11:27:28","modified_gmt":"2016-06-13T11:27:28","slug":"hibernate-creating-table","status":"publish","type":"post","link":"https:\/\/codethataint.com\/blog\/hibernate-creating-table\/","title":{"rendered":"Hibernate creating table from bean"},"content":{"rendered":"

Simple Hibernate Table Creation from Scratch<\/p>\n

\n\t\t\t\t\"Hibernate<\/a>\n\t\t\t\t
Hibernate Required Jar Files List<\/figcaption>\n\t\t\t<\/figure>\n

Step1: Create a Bean for which Table should be created in Database
\nStep2: Create a Class which uses the bean. <\/p>\n

Step 1<\/strong><\/p>\n

\r\npackage com.mugil.dto;\r\n\r\nimport javax.persistence.Entity;\r\nimport javax.persistence.Id;\r\n\r\n@Entity \r\npublic class UserDetails {\r\n\t@Id\t\r\n\tprivate int userId;\r\n\tprivate String userName;\r\n\t\r\n\tpublic int getUserId() {\r\n\t\treturn userId;\r\n\t}\r\n\t\r\n\tpublic void setUserId(int userId) {\r\n\t\tthis.userId = userId;\r\n\t}\r\n\t\r\n\tpublic String getUserName() {\r\n\t\treturn userName;\r\n\t}\r\n\t\r\n\tpublic void setUserName(String userName) {\r\n\t\tthis.userName = userName;\r\n\t}\r\n}\r\n<\/pre>\n
Step 2<\/strong><\/p>\n
\r\npackage com.mugil.access;\r\n\r\nimport org.hibernate.Session;\r\nimport org.hibernate.SessionFactory;\r\nimport org.hibernate.boot.registry.StandardServiceRegistryBuilder;\r\nimport org.hibernate.cfg.Configuration;\r\nimport org.hibernate.service.ServiceRegistry;\r\n\r\nimport com.mugil.dto.UserDetails;\r\n\r\npublic class CreateUser {\r\n\tprivate static ServiceRegistry serviceRegistry;\r\n\tprivate static SessionFactory sessionFactory;\r\n\t\r\n\tpublic static void main(String[] args) {\r\n\t\tUserDetails objUserDetail =  new UserDetails();\r\n\t\tobjUserDetail.setUserId(101);\r\n\t\tobjUserDetail.setUserName("Mugil");\r\n\t\t\r\n\t\tSessionFactory sessionFact = createSessionFactory();\r\n\t\tSession session = sessionFact.openSession();\r\n\t\tsession.beginTransaction();\r\n\t\tsession.save(objUserDetail);\r\n\t\tsession.getTransaction().commit();\t\r\n\t}\r\n\t\r\n\t\r\n\tpublic static SessionFactory createSessionFactory() {\r\n\t    Configuration configuration = new Configuration();\r\n\t    configuration.configure();\r\n\t    serviceRegistry = new StandardServiceRegistryBuilder().applySettings(\r\n\t            configuration.getProperties()).build();\r\n\t    sessionFactory = configuration.buildSessionFactory(serviceRegistry);\r\n\t    return sessionFactory;\r\n\t}\r\n}\r\n<\/pre>\n
In Some cases the hibernate.cfg.xml might become unrecognized.In such case the code should be changed to force the config to be picked from the file location.<\/p>\n
\r\npublic static SessionFactory createSessionFactory() \r\n{\r\n  Configuration configuration = new Configuration().configure();\t  \r\n  configuration.configure("hibernate.cfg.xml");\t  \r\n  configuration.addAnnotatedClass(com.mugil.tutor.UserDetails.class);\r\n\t  \r\n  serviceRegistry = new   StandardServiceRegistryBuilder().applySettings(configuration.getProperties()).build();\r\n  sessionFactory = configuration.buildSessionFactory(serviceRegistry);\r\n  return sessionFactory;\r\n}\r\n<\/pre>\n
Hibernate uses SessionFactory pattern internally as below<\/p>\n
\r\nSessionFactory sessionFact = createSessionFactory();\r\nSession session = sessionFact.openSession();\r\nsession.beginTransaction();\r\nsession.save(objUserDetail);\r\nsession.getTransaction().commit();\t\r\n<\/pre>\n
1.Create Object for SessionFactory
\n2.Open Session to begin Transaction
\n3.Begin Transaction using beginTransaction() Method
\n4.Save the Object by Passing Object of the bean
\n5.Complete the Transaction using commit<\/p>\n
Annotations<\/strong>
\n@Entity – Means entity as a whole>table would be created by the Name of the Entity
\n@Id – Tells the Primary Key<\/p>\n
Having a Different table name from Class Name<\/strong>
\nAnnotations<\/strong><\/p>\n
\r\n@Entity(name="User_Details")\r\npublic class Users \r\n{\r\n .\r\n .\r\n}\r\n<\/pre>\n
Table with User_Details would be created instead of  Users<\/strong><\/p>\n
Having a Different Column name from Object Name<\/strong>
\nAnnotations<\/strong><\/p>\n
\r\n@Entity(name="User_Details")\r\npublic class Users \r\n{\r\n @Id\r\n @Column(name="USER_ID")\r\n private String UserId;\r\n .\r\n .\r\n}\r\n<\/pre>\n
Columns with User_Id would be created instead of  UserId<\/strong><\/p>\n
Appending String to Getters<\/strong><\/p>\n
\r\npublic void setName(String name) \r\n{\r\n  Name = name + " Append Test ";\r\n}\r\n<\/pre>\n
Appending String to Getters<\/strong><\/p>\n
\r\n@Entity\r\n@Table (name="User_Details")\r\npublic class Users \r\n{\r\n\r\n}\r\n<\/pre>\n
The Entity Name Still remains the same but the table Name is different.<\/p>\n
@Basic Annotation – Tells Hibernate to persist which it does by default<\/strong><\/p>\n
\r\npublic class Users \r\n{\r\n @Basic\r\n private String UserName;\r\n . \r\n .\r\n}\r\n<\/pre>\n
@Basic has 2 Parameters – Fetch, optional<\/em>. The only time you use @Basic is while applying the above options. <\/p>\n
@Transient Annotation – Tells Hibernate to not store data in database<\/strong><\/p>\n
\r\npublic class Users \r\n{\r\n @Transient\r\n private String UserName;\r\n . \r\n .\r\n}\r\n<\/pre>\n
@Temporal Annotation – Tells Hibernate to specify Date or Time<\/strong><\/p>\n
\r\npublic class Users \r\n{\r\n @Temporal (TemporalType.Date)\r\n private String joinedDate;\r\n . \r\n .\r\n}\r\n<\/pre>\n
Without  @Temporal the joinedDate is store along with TimeStamp in DB. Now using TemporalType(which is ENUM) you can select the type of data which can be stored in  Database.<\/p>\n
@Lob – Tells Hibernate to specify Date or Time<\/strong><\/p>\n
\r\npublic class Users \r\n{\r\n @Lob\r\n private String Address;\r\n . \r\n .\r\n}\r\n<\/pre>\n
Tells the database field should be created as CLOB instead of VARCHAR(255).<\/p>\n
\"\"<\/p>\n","protected":false},"excerpt":{"rendered":"
Simple Hibernate Table Creation from Scratch Step1: Create a Bean for which Table should be created in Database Step2: Create a Class which uses the bean. Step 1 package com.mugil.dto; import javax.persistence.Entity; import javax.persistence.Id; @Entity public class UserDetails { @Id private int userId; private String userName; public int getUserId() { return userId; } public void… Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[74],"tags":[],"class_list":["post-503","post","type-post","status-publish","format-standard","hentry","category-hibernate"],"_links":{"self":[{"href":"https:\/\/codethataint.com\/blog\/wp-json\/wp\/v2\/posts\/503","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/codethataint.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/codethataint.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/codethataint.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/codethataint.com\/blog\/wp-json\/wp\/v2\/comments?post=503"}],"version-history":[{"count":19,"href":"https:\/\/codethataint.com\/blog\/wp-json\/wp\/v2\/posts\/503\/revisions"}],"predecessor-version":[{"id":1238,"href":"https:\/\/codethataint.com\/blog\/wp-json\/wp\/v2\/posts\/503\/revisions\/1238"}],"wp:attachment":[{"href":"https:\/\/codethataint.com\/blog\/wp-json\/wp\/v2\/media?parent=503"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/codethataint.com\/blog\/wp-json\/wp\/v2\/categories?post=503"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/codethataint.com\/blog\/wp-json\/wp\/v2\/tags?post=503"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}