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com.fasterxml.jackson.dataformat.xml.XmlMapper Example
How to use com.fasterxml.jackson.dataformat.xml.XmlMapper class?
✍: FYIcenter.com
com.fasterxml.jackson.dataformat.xml.XmlMapper class allows you to map a Java class object to a JSON message in a pretty format.
You can follow this tutorial to try it.
1. Write a sample Java program, XmlMapperWriter.java:
// XmlMapperWriter.java // Copyright (c) FYIcenter.com import com.fasterxml.jackson.databind.ObjectMapper; import com.fasterxml.jackson.dataformat.xml.XmlMapper; public class XmlMapperWriter { public static void main(String[] args) throws Exception { Person person = new Person(); ObjectMapper mapper = new XmlMapper(); String xml = mapper.writeValueAsString(person); System.out.println(xml); } public static class Person { private String name = "John Smith"; private boolean married = false; private int age = 25; private String phone = null; public String getName() { return this.name; } public boolean getMarried() { return this.married; } public int getAge() { return this.age; } public String getPhone() { return this.phone; } } }
2. Run this Java program with 4 Jackson JAR files. Too bad. It requires the org/codehaus/stax2/XMLInputFactory2 class.
fyicenter$ java -cp jackson-core-2.14.0.jar: \ jackson-databind-2.14.0.jar: \ jackson-annotations-2.14.0.jar \ jackson-dataformat-xml-2.14.0.jar \ XmlMapperWriter.java Exception in thread "main" java.lang.NoClassDefFoundError: org/codehaus/stax2/XMLInputFactory2 ... at java.base/java.util.ServiceLoader$3.hasNext(ServiceLoader.java:1386) at java.xml/javax.xml.stream.FactoryFinder$1.run(FactoryFinder.java:348) ...
Go to Stax2 Maven Website. Download stax2-api-4.0.0.jar and included it in the classpath. Too bad. It requires another class.
fyicenter$ java -cp jackson-core-2.14.0.jar: \ jackson-databind-2.14.0.jar: \ jackson-annotations-2.14.0.jar \ jackson-dataformat-xml-2.14.0.jar \ stax2-api-4.0.0.jar \ XmlMapperWriter.java Exception in thread "main" java.lang.NoClassDefFoundError: com/fasterxml/jackson/module/jaxb/JaxbAnnotationIntrospector ... at com.fasterxml.jackson.dataformat.xml.util.AnnotationUtil.findNamespaceAnnotation at com.fasterxml.jackson.dataformat.xml.ser.XmlBeanSerializerModifier.changeProperties at com.fasterxml.jackson.databind.ser.BeanSerializerFactory.constructBeanOrAddOnSerializer ...
Go to Jackson Maven Website. Download jackson-module-jaxb-annotations-2.14.0.jar and included it in the classpath.
fyicenter$ java -cp jackson-core-2.14.0.jar: \ jackson-databind-2.14.0.jar: \ jackson-annotations-2.14.0.jar \ jackson-dataformat-xml-2.14.0.jar \ stax2-api-4.0.0.jar \ jackson-module-jaxb-annotations-2.14.0.jar \ XmlMapperWriter.java <Person xmlns=""> <name>John Smith</name><married>false</married><age>25</age><phone/> </Person>
The Java program mapped a Java class object to an XML message correctly.
⇐ com.fasterxml.jackson.databind.ObjectWriter Example
2021-08-11, 1595🔥, 0💬
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