RESTful Java Web Services - Third Edition

Using Jackson streaming APIs to generate JSON

The following example illustrates Jackson streaming APIs for writing JSON data. This example reads a list of Employee objects, converts them into JSON representations, and then writes to the OutputStream object. The steps are as follows:

1. The following code snippet generates com.fasterxml.jackson.core.JsonGenerator by using com.fasterxml.jackson.core.JsonFactory:

OutputStream outputStream = new    FileOutputStream("emp-array.json");JsonGenerator jsonGenerator = new    JsonFactory().createGenerator(outputStream,      JsonEncoding.UTF8);

2. The next step is to build the JSON representation for the list of employees. The writeStartArray() method writes the starting marker for the JSON array ([). Now, write ...