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Hibernate

  • Advantage of Hibernate over JDBC
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  • First Hibernate Application
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  • Hibernate Data Type-Java Data Type - SQL Data Type mapping
  • One to Many Relation in Hibernate
  • One to Many Relation in Hibernate bi-directional
  • Many to Many Relation in Hibernate
  • HQL: The Hibernate Query Language
  • Criteria Queries
  • Criteria Queries : Equal (eq), Not Equal(ne), Less than (le), greater than (gt),greater than or equal(ge) and Ordering the results
  • Criteria Queries: And OR conditions
  • Hibernate generator to generate id (primary key)
  • prevent concurrent update in Hibernate,slate object updatation in Hibernate,version checking in Hibernate

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  • Model View Controller (MVC)
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  • Struts Tutorial - Mutli-click prevention using struts tokens-Prevent Duplicate Submission
  • Logic Iterate Map and List

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    Spring


  • Spring Tutorial
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  • Developing Your First Spring Web Application
  • Developing Your Second Spring Web Application with Spring Form
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  • Spring integration with Hibernate
  • Hibernate Tutorial Step by Step -- Code Examples

    HQL: The Hibernate Query Language The Hibernate Query Language is executed using session.createQuery(). This tutorial includes from clause,Associations and joins, Aggregate functions,The order by clause,The group by clause,Subqueries.

    The from clause

    from Employee // Employee is class name mapped to EMPLOYEE TABLE
    or
    from Employee as e
    or
    from Employee e where e.empId = 3;
    List empList = session.createQuery("from Employee").list();

    Associations and joins

    from Employee e where e.scopeModFlag = 1 and pc.isDeleted != 1
    List empList = session.createQuery("from Employee e where e.scopeModFlag = 1 and pc.isDeleted != 1").list();

    Aggregate functions

    select avg(cat.weight), sum(cat.weight), max(cat.weight), count(cat) from Cat cat ScrollableResults rs = session.createQuery("select avg(cat.weight), sum(cat.weight), max(cat.weight), count(cat) from Cat cat").scroll();
    if(rs.next()){
    System.out.println(rs.get(0));
    System.out.println(rs.get(1));
    System.out.println(rs.get(2));
    System.out.println(rs.get(3));
    }

    The order by clause

    from Employee e order by e.name desc
    List empList = session.createQuery("from Employee e order by e.name desc").list();
    asc or desc indicate ascending or descending order respectively.

    The group by clause

    select e.dept, sum(e.salary), count(e) Employee e group by cat.dept

    Subqueries

    from Employee as e
    where e.name = some (
    select name.nickName from Name as name
    )

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