Configuration of an MVC-based web application

Question

Configuration of an MVC-based web application

As a newcomer to web application development, I am currently working on building a web application using the Model-View-Controller pattern. My setup includes a MySQL database for the Model, JSP pages for the Views, and a DAO for the Controller.

I am looking for guidance on how to retrieve data from the database and dynamically generate a table with that information. Should I resort to using JSP scriptlets or incorporate JavaScript? I have read mixed opinions about the use of scriptlets in JSP and I want to make sure I follow best practices.

javascript jsp web web-applications

Answer 1

Answer №1

Suppose you are looking to create a JSON API with a standalone client-side application, as discussed in the comments. To achieve this, you will need to send an AJAX HTTP request to your server. There are various libraries available for this task, including jQuery.

Retrieving the data

To begin, fetch the data from your web server using jQuery.get:

$.get( "ajax/test.html", function( data ) {
  $( ".result" ).html( data );
  alert( "Load was performed." );
});

For more information, refer to the tutorial on jQuery documentation.

Displaying the data in HTML format

There are multiple ways to achieve this using jQuery. I suggest exploring the following answers for guidance:

Using jQuery: Create HTML table using jQuery and JSON array
Using pure JS: Generate HTML table from 2D JavaScript array

Answer 2

Suppose you are looking to create a JSON API with a standalone client-side application, as discussed in the comments. To achieve this, you will need to send an AJAX HTTP request to your server. There are various libraries available for this task, including jQuery.

Retrieving the data

To begin, fetch the data from your web server using jQuery.get:

$.get( "ajax/test.html", function( data ) {
  $( ".result" ).html( data );
  alert( "Load was performed." );
});

For more information, refer to the tutorial on jQuery documentation.

Displaying the data in HTML format

There are multiple ways to achieve this using jQuery. I suggest exploring the following answers for guidance:

Using jQuery: Create HTML table using jQuery and JSON array
Using pure JS: Generate HTML table from 2D JavaScript array

Answer 3

Answer №2

To implement this functionality, one approach is to create a class within your Models that represents a database row and include a method for reading a row. This class can also have a Get method that returns a list of objects, as shown below:

public class MyItem
{
    public string Id { get; set; }
    public string MyProperty { get; set; }

    public List<MyItem> Get()
    {
        List<MyItem> items = new List<MyItem>();

        try
        {
            // Code for retrieving data from the database
        }
        catch (Exception)
        {
            // Logging error
            throw;
        }
        return items;
    }
    
    public void FromRow(DataRow row)
    {
        // Method for populating object properties from a DataRow
    }
}

In your controller, you would call the Get method of the MyItem class to retrieve the desired items based on specified criteria. An example implementation in the controller could look like this:

[Authorize(Roles = "...")]
public IActionResult GetMyItems(string id)
{
    MyItem item = new MyItem() { Id = id };
    var items = item.Get();

    return items;
}

Finally, after fetching the data using the controller, you should be able to access it through the Model property in your view.

Answer 4

To implement this functionality, one approach is to create a class within your Models that represents a database row and include a method for reading a row. This class can also have a Get method that returns a list of objects, as shown below:

public class MyItem
{
    public string Id { get; set; }
    public string MyProperty { get; set; }

    public List<MyItem> Get()
    {
        List<MyItem> items = new List<MyItem>();

        try
        {
            // Code for retrieving data from the database
        }
        catch (Exception)
        {
            // Logging error
            throw;
        }
        return items;
    }
    
    public void FromRow(DataRow row)
    {
        // Method for populating object properties from a DataRow
    }
}

In your controller, you would call the Get method of the MyItem class to retrieve the desired items based on specified criteria. An example implementation in the controller could look like this:

[Authorize(Roles = "...")]
public IActionResult GetMyItems(string id)
{
    MyItem item = new MyItem() { Id = id };
    var items = item.Get();

    return items;
}

Finally, after fetching the data using the controller, you should be able to access it through the Model property in your view.

Configuration of an MVC-based web application

Answer №1

Answer №2

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