Java ObjectWriter-class And Method Code Example

Here is a basic example of how to use the ObjectWriter class in the com.fasterxml.jackson.databind package in Java:

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.ObjectWriter;
import com.fasterxml.jackson.databind.JsonNode;

import java.util.List;

public class Example {
    public static void main(String[] args) throws Exception {
        ObjectMapper mapper = new ObjectMapper();
        ObjectWriter writer = mapper.writer();
        JsonNode root = mapper.createObjectNode();
        // add some properties to the root node
        writer.writeValue(new File("example.json"), root);

In this example, we are importing the ObjectWriter and ObjectMapper classes, as well as the JsonNode class from the com.fasterxml.jackson.databind package. We then create an instance of the ObjectMapper class, and use its writer() method to get an ObjectWriter instance with default configuration.

We then use the createObjectNode() method of the ObjectMapper instance to create a new JsonNode object and add some properties to it. Finally, we use the writeValue method of the ObjectWriter instance to write the JsonNode object to a file.

This is just a basic example of how to use the ObjectWriter class, you can use it to configure the ObjectWriter for custom serialization, for example, you can use set methods to ignore properties, set date format, etc.