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You can use add() method available for Criteria object to add restriction for a criteria query. Following is the example to add a restriction to return the records with salary is equal to 2000:
Criteria cr =session.createCriteria(Employee.class);
cr.add(Restrictions.eq("salary",2000)); List results =cr.list(); Following are the few more examples covering different scenarios and can be used as per requirement:
Criteria cr =session.createCriteria(Employee.class);
// To get records having salary more than 2000 cr.add(Restrictions.gt("salary",2000)); // To get records having salary less than 2000 cr.add(Restrictions.lt("salary",2000)); // To get records having fistName starting with zara cr.add(Restrictions.like("firstName","zara%")); // Case sensitive form of the above restriction. cr.add(Restrictions.ilike("firstName","zara%")); // To get records having salary in between 1000 and 2000 cr.add(Restrictions.between("salary",1000,2000)); // To check if the given property is null cr.add(Restrictions.isNull("salary")); // To check if the given property is not null cr.add(Restrictions.isNotNull("salary")) // To check if the given property is empty cr.add(Restrictions.isEmpty("salary")); // To check if the given property is not empty cr.add(Restrictions.isNotEmpty("salary")); You can create AND or OR conditions using LogicalExpression restrictions as follows:
Criteria cr =session.createCriteria(Employee.class);
Criterion salary =Restrictions.gt("salary",2000); Criterion name =Restrictions.ilike("firstNname","zara%"); // To get records matching with OR condistions LogicalExpression orExp =Restrictions.or(salary, name); cr.add( orExp ); // To get records matching with AND condistions LogicalExpression andExp =Restrictions.and(salary, name); cr.add( andExp ); List results =cr.list(); Though all the above conditions can be used directly with HQL as explained in previous tutorial. |
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