Usually, if we want to update a record in the database, first of all, we should get that record and manipulate and save it to the database. It is a usual practice of updating the record in the database. But in hibernate if we know the record id primary key we can directly update the record in the database without load or getting the record from the database.
If we know the record id, then we can directly create a new object and assign the primary key to it and save using update method. Example: In this example, I am going to update the below student object in the database. By running the above application, we can update the student details using hibernate update method. Based on the Id property primary key hibernate will update the details in the database. We can find the updated details on the above database screenshot. A problem with this approach is, we must set all the properties of an object.
By using this approach, we can update an object with loading the object from the database. We can load the object from the database by calling load or get methods. There are some functionality differences between the load vs get methods in hibernate. Example :. On the above example, we got an object of a student by calling load method.
Hi i am trying to simple a web application using jsp,servlat and hibernate where i am trying to insert update and delete records i am getting problem when i am going to update record How can i achieve this Here is my code updaterecprd. Add a comment. Active Oldest Votes. Try to swap the 2 rows tr.
StanislavL StanislavL ANy errors? Is the Contact instance retrieved correctly? Which ID is retrieved from DB? Rohit Rohit 2, 1 1 gold badge 15 15 silver badges 24 24 bronze badges. This code is instead of session. Update part remains same. Sign up or log in Sign up using Google.
Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Podcast Making Agile work for data science. Stack Gives Back Featured on Meta.
0コメント