Java EE 8 Application Development

Parsing JSON data with the Streaming API

In this section, we will cover how to parse the JSON data we receive from a stream. Please refer to the following code:

    package net.ensode.javaee8book.jsonpstreaming; 
 
    //other imports omitted 
    import javax.json.Json; 
    import javax.json.stream.JsonGenerator; 
    import javax.json.stream.JsonParser; 
    import javax.json.stream.JsonParser.Event; 
 
    @Named 
    @SessionScoped 
    public class JsonpBean implements Serializable { 
 
      private String jsonStr; 
 
      @Inject 
      private Customer customer; 
 
      public String parseJson() { 
 
        StringReader stringReader = new StringReader(jsonStr); 
 
        JsonParser jsonParser = Json.createParser(stringReader); 
 
        Map<String, String> keyValueMap = new HashMap<>(); 
        String key = null; 
        String value = null; 
 
        while (jsonParser.hasNext()) ...