Here is an example of how you can use the com.fasterxml.jackson.databind.Java7SupportImpl class from the Jackson library in Java:

import com.fasterxml.jackson.databind.Java7SupportImpl;

public class Example {
    public static void main(String[] args) {
        // Create an instance of the Java7SupportImpl class
        Java7SupportImpl java7Support = new Java7SupportImpl();

        // Register the Java7SupportImpl instance with the ObjectMapper
        ObjectMapper mapper = new ObjectMapper();
        mapper.registerModule(java7Support);

        // Now you can use the ObjectMapper to serialize and deserialize Java 7 data types
        try {
            // Serialize a Path object to a JSON string
            Path path = Paths.get("/path/to/file.txt");
            String json = mapper.writeValueAsString(path);
            System.out.println(json); // "\"/path/to/file.txt\""

            // Deserialize a JSON string to a Path object
            Path deserializedPath = mapper.readValue(json, Path.class);
            System.out.println(deserializedPath); // "/path/to/file.txt"

        } catch (JsonProcessingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

This example uses the Java7SupportImpl class to enable the serialization and deserialization of Java 7's Path class, which is not supported by the default ObjectMapper class. To use Java7SupportImpl, you need to instantiate it and then register it as a module with an ObjectMapper instance. Once this is done, you can use the ObjectMapper as usual to serialize and deserialize Path objects.

Please note that this is just an example of how you might use this class, but you can use it for other Java 7 data types like Optional and DateTimeFormatter and any other custom data types that you have.

Also remember that Java7SupportImpl is a class that extends the com.fasterxml.jackson.databind.Module and it provides additional functionality for handling Java 7 data types.