I am using the Jackson to convert a List of XML to JSON after converting each event from the XML List<> I am storing the converted JSON into List<String>.
After all conversion, I have to create a new JSON with some outer elements and then finally add the converted JSON from previously-stored List<String>. Everything works fine but when I add the JSON from List<String> it also adds the \n, \ and all my formatting goes away. I am not sure why it does like this.
I tried to search and use the various methods mentioned but nothing seems to work so thought of posting here the same. Really sorry if found a duplicate.
Following is the code: (Please note: This is a sample direct code I have provided so that anyone who is trying can try directly to figure out the issue. However, another sample code with a complete workflow has been given below. Just to provide an indication how I am doing actually in my application. However, both are adding the \ and removing the formatting.)
I just want to know how to avoid adding these \ and other non-relevant characters to my Final JSON and add formatting to it.
public class Main {
public static void main(String[] args) throws IOException {
List<String> stringEvents = new ArrayList<>();
stringEvents.add("{\n" +
" isA : \"Customer\",\n" +
" name : \"Rise Against\",\n" +
" age : \"2000\",\n" +
" google:sub : \"MyValue\",\n" +
" google:sub : \"MyValue\"\n" +
"}");
JsonFactory factory = new JsonFactory();
StringWriter jsonObjectWriter = new StringWriter();
JsonGenerator generator = factory.createGenerator(jsonObjectWriter);
generator.writeStartObject();
generator.writeStringField("schema", "1.0");
generator.writeFieldName("eventList");
generator.writeStartArray();
stringEvents.forEach(event->{
try {
generator.writeObject(event);
} catch (IOException e) {
e.printStackTrace();
}
});
generator.writeEndArray();
generator.writeEndObject();
generator.close();
System.out.println(jsonObjectWriter.toString());
}
}
Following is the output I am getting:
{"isA":"Customer","name":"Rise Against","age":"2000"}
{"schema":"1.0","eventList":["{\"isA\":\"Customer\",\"name\":\"Rise Against\",\"age\":\"2000\"}","{\"isA\":\"Customer\",\"name\":\"Rise Against\",\"age\":\"2000\"}"]}
Following is my complete workflow and code:
XML file and performing the unmarshalling of the XML to Customer.class.JSON Conversion and storing the converted JSON into List<String>.Final JSON with all header information.Following is my Customer.class:
@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, visible = true, property = "isA")
@JsonInclude(Include.NON_NULL)
@JsonIgnoreProperties(ignoreUnknown = true)
@XmlRootElement(name = "extension")
@XmlType(name = "extension", propOrder = {"name", "age"})
@XmlAccessorType(XmlAccessType.FIELD)
@Getter
@Setter
@AllArgsConstructor
@ToString
@NoArgsConstructor
public class Customer {
@XmlTransient
private String isA;
@XmlPath("customer/name/text()")
private String name;
@XmlPath("customer/age/text()")
private String age;
}
Following is my Unmarshaling and Json Creation class:
public class Unmarshalling {
public static void main(String[] args) throws JAXBException, XMLStreamException, FactoryConfigurationError, IOException {
final InputStream inputStream = Unmarshalling.class.getClassLoader().getResourceAsStream("customer.xml");
final XMLStreamReader xmlStreamReader = XMLInputFactory.newInstance().createXMLStreamReader(inputStream);
final Unmarshaller unmarshaller = JAXBContext.newInstance(Customer.class).createUnmarshaller();
final Customer customer = unmarshaller.unmarshal(xmlStreamReader, Customer.class).getValue();
final String jsonEvent = new ObjectMapper().writeValueAsString(customer);
System.out.println(jsonEvent);
List<String> stringEvents = new ArrayList<>();
stringEvents.add(jsonEvent);
stringEvents.add(jsonEvent);
JsonFactory factory = new JsonFactory();
StringWriter jsonObjectWriter = new StringWriter();
JsonGenerator generator = factory.createGenerator(jsonObjectWriter);
generator.writeStartObject();
generator.writeStringField("schema", "1.0");
generator.writeFieldName("eventList");
generator.writeStartArray();
stringEvents.forEach(event->{
try {
generator.writeObject(event);
} catch (IOException e) {
e.printStackTrace();
}
});
generator.writeEndArray();
generator.writeEndObject();
generator.close();
System.out.println(jsonObjectWriter.toString());
}
}
Following is my xml file:
<extension xmlns:google="https://google.com">
<customer>
<name>Rise Against</name>
<age>2000</age>
</customer>
</extension>
After trying for few more things I tried generator.writeRaw(event); and that worked.
import com.fasterxml.jackson.core.JsonFactory;
import com.fasterxml.jackson.core.JsonGenerator;
import java.io.IOException;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.List;
public class Main {
public static void main(String[] args) throws IOException {
List<String> stringEvents = new ArrayList<>();
stringEvents.add("{\n" +
" isA : \"Customer\",\n" +
" name : \"Rise Against\",\n" +
" age : \"2000\",\n" +
" google:sub : \"MyValue\",\n" +
" google:sub : \"MyValue\"\n" +
"}");
JsonFactory factory = new JsonFactory();
StringWriter jsonObjectWriter = new StringWriter();
JsonGenerator generator = factory.createGenerator(jsonObjectWriter);
generator.writeStartObject();
generator.writeStringField("schema", "1.0");
generator.writeFieldName("eventList");
generator.writeStartArray();
stringEvents.forEach(event->{
try {
generator.writeRaw(event);
} catch (IOException e) {
e.printStackTrace();
}
});
generator.writeEndArray();
generator.writeEndObject();
generator.close();
System.out.println(jsonObjectWriter.toString());
}
}