JAXB Examples

Author: lokeshgupta1981

src/main/java/com/howtodoinjava/jaxb/NoDefaultConstructor.java

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+package com.howtodoinjava.jaxb;
+
+import jakarta.xml.bind.JAXBContext;
+import jakarta.xml.bind.JAXBException;
+import jakarta.xml.bind.Marshaller;
+import jakarta.xml.bind.Unmarshaller;
+import jakarta.xml.bind.annotation.XmlAccessType;
+import jakarta.xml.bind.annotation.XmlAccessorType;
+import jakarta.xml.bind.annotation.XmlRootElement;
+import jakarta.xml.bind.annotation.XmlTransient;
+import jakarta.xml.bind.annotation.adapters.XmlAdapter;
+import jakarta.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
+import java.io.StringReader;
+import java.io.StringWriter;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+public class NoDefaultConstructor {
+
+  public static void main(String[] args) throws JAXBException {
+    Address address = new Address("Line 1", "Line 2", "New Delhi", "India", new PinCode("110075"));
+    JAXBContext jaxbContext = JAXBContext.newInstance(Address.class);
+    Marshaller jaxbMarshaller = jaxbContext.createMarshaller();
+    StringWriter stringWriter = new StringWriter();
+    jaxbMarshaller.marshal(address, stringWriter);
+    String XML = stringWriter.toString();
+    System.out.println(XML);
+
+    String xmlAddress = """
+        <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+        <Address>
+        	<line1>Line 1</line1>
+        	<line2>Line 2</line2>
+        	<city>New Delhi</city>
+        	<country>India</country>
+        	<pinCode>
+        		<code>110075</code>
+        	</pinCode>
+        </Address>
+        """;
+
+    Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();
+    Address newAddress = (Address) jaxbUnmarshaller.unmarshal(new StringReader(xmlAddress));
+    System.out.println(newAddress);
+  }
+}
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+@XmlRootElement(name = "Address")
+@XmlAccessorType(XmlAccessType.FIELD)
+class Address {
+  String line1;
+  String line2;
+  String city;
+  String country;
+  //@XmlTransient
+  @XmlJavaTypeAdapter(PinCodeAdapter.class)
+  PinCode pinCode;
+}
+@Data
+class PinCode {
+  String code;
+
+  public PinCode(String code){
+    this.code = code;
+  }
+}
+
+@Data
+class XmlPinCode {
+
+  String code;
+  public XmlPinCode(){
+  }
+
+  public XmlPinCode(String code){
+    this.code = code;
+  }
+}
+
+class PinCodeAdapter extends XmlAdapter<XmlPinCode, PinCode> {
+
+  @Override
+  public PinCode unmarshal(XmlPinCode v) throws Exception {
+    return new PinCode(v.getCode());
+  }
+
+  @Override
+  public XmlPinCode marshal(PinCode v) throws Exception {
+    return new XmlPinCode(v.getCode());
+  }
+}

src/main/java/com/howtodoinjava/jaxb/XmlTypeAdapterOverInterface.java

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+package com.howtodoinjava.jaxb;
+
+import jakarta.xml.bind.JAXBContext;
+import jakarta.xml.bind.JAXBException;
+import jakarta.xml.bind.Marshaller;
+import jakarta.xml.bind.Unmarshaller;
+import jakarta.xml.bind.annotation.XmlAccessType;
+import jakarta.xml.bind.annotation.XmlAccessorType;
+import jakarta.xml.bind.annotation.XmlRootElement;
+import jakarta.xml.bind.annotation.adapters.XmlAdapter;
+import jakarta.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
+import java.io.StringReader;
+import java.io.StringWriter;
+import java.time.LocalDateTime;
+import java.time.temporal.Temporal;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+public class XmlTypeAdapterOverInterface {
+
+  public static void main(String[] args) throws JAXBException {
+    JAXBContext jaxbContext = JAXBContext.newInstance(BatchJob.class);
+    Marshaller jaxbMarshaller = jaxbContext.createMarshaller();
+    StringWriter stringWriter = new StringWriter();
+    jaxbMarshaller.marshal(new BatchJob(LocalDateTime.now()), stringWriter);
+    String XML = stringWriter.toString();
+    System.out.println(XML);
+
+    Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();
+    BatchJob newBatchJob = (BatchJob) jaxbUnmarshaller.unmarshal(new StringReader(XML));
+    System.out.println(newBatchJob);
+  }
+}
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+@XmlRootElement(name = "BatchJob")
+@XmlAccessorType(XmlAccessType.FIELD)
+class BatchJob {
+
+  @XmlJavaTypeAdapter(TemporalAdapter.class)
+  Temporal startTime;
+}
+
+class TemporalAdapter extends XmlAdapter<String, Temporal> {
+
+  @Override
+  public Temporal unmarshal(String v) throws Exception {
+    return LocalDateTime.parse(v);
+  }
+
+  @Override
+  public String marshal(Temporal v) throws Exception {
+    return v.toString();
+  }
+}
+
+
+