Develop RESTful Java Web Services using JAX-RS and Jersey

Create a new Maven web project in Eclipse, configure group and artifact IDs and Java 8, add a deployment descriptor, and run on Tomcat to view the home page.

Learn how to produce different representations from a web service using content negotiation, mapping accept headers to text/plain and application/json outputs in a Jersey-based JAX-RS resource.

Demonstrates importing a database table and data into the project database, including unzipping the dataset, locating the file, running and connecting to the database, and importing up to 1000 records.

Develop a dao interface and a jdbc-based implementation for managing contacts, including an entity with fields and getters/setters, and a connection utility that reads db settings from a properties file.

Implement the addContact() method by inserting a contact via a prepared statement, capture and assign the generated primary key, and return the updated contact using try-with-resources.

Implement the updateContact() method using a prepared update statement with seven parameters, execute it, and return the affected row count; throw an exception if no records update.

implement delete contact using a prepared sql delete from contacts where id = ? with a try-with-resources block, handle exceptions, and return a message based on the row count.

Implement find methods using prepared statements for select queries, map results to contact objects, and refactor shared logic into a private helper for find by city, country, or all.

Create a dao factory to decouple the web service interface from gbc and hibernate implementations. Make the factory final with a private constructor and a switch-based selection.

Create a Jersey REST endpoint to handle GET requests and return JSON for all contacts or a specific contact by id, using path and query parameters.

Learn to handle post requests to create a new resource in a RESTful Java web service using JAX-RS and Jersey by consuming JSON, mapping with Jackson, and persisting a contact.

Update a contact resource using the put method in a RESTful Java service with JAX-RS and Jersey, sending a JSON payload to modify email and city and receive updated data.

Explain how to implement a JAX-RS delete endpoint to remove a contact by id, returning 200 ok for successful deletes and handling invalid ids and exceptions.

Map thrown exceptions to a custom JSON error response in restful services, including an error message and timestamp, and return a meaningful HTTP status code.

Develop a custom MessageBodyWriter provider to serialize Contact objects (and lists) to CSV text, implementing isWriteable, getSize, and writeTo to output header and data lines.

Showcases a MessageBodyReader that converts CSB data into a contact object during a post request, reading from an input stream and parsing comma-separated fields to persist to the database.

Implement a servlet filter to enable cross-origin resource sharing (CORS) for RESTful Java web services, adding access-control headers (origin, methods, headers) to allow cross-origin requests to /api/contacts.

Export a war file from Eclipse for deployment on a Tomcat server using the export wizard. Verify contents with jar tf to confirm web content, classes, and dependencies.

Deploy a restful Java web service on a locally installed Apache Tomcat by hard deploying the war into Tomcat's webapps folder. Start Tomcat and confirm endpoints like /api/hello and /api/1.