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How to update a database from a JTable?

Posted on 2009-04-08
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Last Modified: 2013-11-23
I have a form with a Jtable and need to update a row in it and update the row back to the database, The JTable is editable, I can change cell values but i don't know how to update the DB
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Question by:imarquez
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Haris V earned 500 total points
ID: 24097401
You must do that manually.
If you come from m$ camp you probably are searching data binding. You can find it as far as i know for example in JBuilder(www.borland.com). But i prefer to do some data access layer, for example using hibernate(www.hibernate.org)
/**
 Some simple scenario
*/
setValueAt(Object o,int row,int col)
{
 String sql= "UPDATE Disease SET "+this.getColumnName(int col)+" = '"+(String o)+"' WHERE someId = "+this.getColumnName(0);//this.getColumnName(0) - your id column

doYourUpdateSql(sql);
}

Object getValueAt(int row, int col)
{
 String sql="SELECT "+this.getColumnName(col)+" FROM Disease WHERE someId="+this.getColumnName(0);
 String result=doYourQuery(sql);
 return result;
}



Lots of JTable samples here - http://www.javaalmanac.com/cgi-bin/search/find.pl?words=JTable

Make sure you close your connections once you've retrieved the values or updated them into the DB

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Author Comment

by:imarquez
ID: 24097474
I already have a persistence layer using JPA, the model of the table gets its data from it, but I need to know how to do it "backwards", the model gets the updated row from the table and calls for the persistence layer to update that object (row).
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