How to use the old version of the Jaxb Runtime framework in the Java library for data binding
How to use the old version of the Jaxb Runtime framework in the Java library for data binding
Overview:
JAXB (Java Architecture for XML Binding) is a standard API for converting XML documents into Java objects and converting Java objects into XML documents on the Java platform.JAXB Runtime is part of the JAXB framework, which provides a runtime environment to perform data binding operations.In the old version of JAXB, there are different framework versions. This article will introduce how to use the old version of the Jaxb Runtime framework in the Java library for data binding and provide the corresponding Java code example.
Step 1: Add Jaxb Runtime dependencies
First, you need to add the required version of the Jaxb Runtime dependencies to the Java library.You can configure the corresponding dependencies in the project construction tool. For example, when using maven, add the following dependencies to the pom.xml file of the project:
<dependencies>
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.3.1</version>
</dependency>
<dependency>
<groupId>com.sun.xml.bind</groupId>
<artifactId>jaxb-impl</artifactId>
<version>2.3.3</version>
</dependency>
</dependencies>
This will add related jar packages implemented by JAXB API and JAXB.
Step 2: Create the Java class and XML mode
In the Java class library, the Java class that needs to be binded by the creation, and uses the XML mode to define the structure of this class.The XML mode can be automatically generated by manually writing or using tools (such as XSD).Here are examples of examples of examples of Java class and corresponding XML mode:
Java class:
package com.example;
public class Person {
private String name;
private int age;
public Person() {
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
XML mode (Person.xsd):
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="person" type="personType"/>
<xs:complexType name="personType">
<xs:sequence>
<xs:element name="name" type="xs:string"/>
<xs:element name="age" type="xs:int"/>
</xs:sequence>
</xs:complexType>
</xs:schema>
Step 3: Perform data binding
Use JAXB Runtime to perform data binding operations in the Java class library. You can convert the XML document into a Java object, or convert the Java object to XML document.Here are some examples code to explain how to bind data:
XML document converted to Java object:
package com.example;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
import java.io.File;
public class Main {
public static void main(String[] args) {
try {
// Create jaxb context
JAXBContext jaxbContext = JAXBContext.newInstance(Person.class);
// Create unmarshaller
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
// The Java object from the XML file
File xmlFile = new File("person.xml");
Person person = (Person) unmarshaller.unmarshal(xmlFile);
// The Java object after the output solution group
System.out.println("Name: " + person.getName());
System.out.println("Age: " + person.getAge());
} catch (JAXBException e) {
e.printStackTrace();
}
}
}
Java object converts to XML document:
package com.example;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import java.io.File;
public class Main {
public static void main(String[] args) {
try {
// Create jaxb context
JAXBContext jaxbContext = JAXBContext.newInstance(Person.class);
// Create Marshaller
Marshaller marshaller = jaxbContext.createMarshaller();
// Late the Java object to XML document
Person person = new Person();
person.setName("John");
person.setAge(30);
File xmlFile = new File("person.xml");
marshaller.marshal(person, xmlFile);
} catch (JAXBException e) {
e.printStackTrace();
}
}
}
Summarize:
In the Java class library, using the old version of the Jaxb Runtime framework for data binding can be used to add the corresponding version of the Jaxb Runtime dependencies, and use the conversion between XML documents and Java objects in JAXB API.Developers can implement detailed implementation according to the needs of the project, and make appropriate modifications and adjustments according to the specific situation.
