TableService

This is a service that accepts JSON object and responds with HTML code to create a table.

Usage

Users can send POST request with JSON into payload (XmlHttpRequest in my example), and with this service they obtain HTML code to inject in their pages.

1. Using POST method and this JSON

{
    header: ['a', 'b', 'c'], 
    body: { 
        1: ['value A1', 1, 'value C1'],
        2: ['value A2', 2, 'value C2', 65, 899],
        3: ['value A3', 3, 'value C3', 65],
        4: ['value A4', 4, 'value C4']
    } 
};

2. Service response will be:

{
    id: 5,
    content: "<table> <tr> <th> a </th><th> b </th><th> c </th> </tr><tr> <td> valore di A1 </td><td> Valore di C1 </td> </tr><tr> <td> valore di A2 </td><td> 2 </td><td> Valore di C2 </td><td> 65 </td><td> 899 </td> </tr><tr> <td> valore di A3 </td><td> 3 </td><td> Valore di C3 </td><td> 65 </td> </tr><tr> <td> valore di A4 </td><td> 4 </td><td> Valore di C4 </td> </tr> </table>",
    tips: "Body line 1 have 2 columns.\nBody line 2 have 5 columns.\nBody line 3 have 4 columns.\n"
}

3. This is tested with Postman as you can see below.
   

Development

• Please read Spring GUI https://spring.io/guides/gs/rest-service/
• Please read also https://www.baeldung.com/spring-boot-json & https://www.baeldung.com/java-org-json

As you can see in source code there are 2 classes, 1 controller and Spring main to run application.

• 'application.properties' are necessary to change port from 8080 (Tomcat default one) to 8081.
• On my server is already running Apache Tomcat so I decided to run my test page (tableservice.html) with it.
• To run the service on the 8081 port, is fondamental to use @CrossOrigin annotation of Spring-boot. This allow CORS origin to my service from "www.cm-innovationlab.it:8080".
• To create JAR with VS Code, simply use "package" function in maven menù after "Reload" Maven project. Alternativelly "mvnw.cmd" package -f "pom.xml" from \TableService\table_service.

Service Installation on Server

This service needs Java JDK 20

• Save .jar file on your server
• Than run java -jar [JAR file]

Test

Is possible to verify this service with my example:
http://www.cm-innovationlab.it:8080/tableservice.html