📅  最后修改于: 2023-12-03 15:20:13.830000             🧑  作者: Mango
本教程将介绍如何在Spring框架中使用JAXB(Java Architecture for XML Binding)来处理XML文件。JAXB允许将Java对象转换为XML格式,也可以将XML格式转换为Java对象。
首先,在pom.xml文件中添加以下Maven依赖:
<dependencies>
<!-- Spring Core -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>5.2.0.RELEASE</version>
</dependency>
<!-- Spring Context -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.2.0.RELEASE</version>
</dependency>
<!-- JAXB -->
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.3.0</version>
</dependency>
<!-- JAXB Runtime -->
<dependency>
<groupId>org.glassfish.jaxb</groupId>
<artifactId>jaxb-runtime</artifactId>
<version>2.3.2</version>
</dependency>
</dependencies>
接下来,我们需要定义一个Java对象,用于将其转换为XML格式。
package com.example.demo;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement
public class Person {
private String name;
private int age;
public Person() {}
public Person(String name, int age) {
this.name = name;
this.age = age;
}
@XmlElement
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@XmlElement
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
接着,我们需要定义一个XML转换器,用于将Java对象转换为XML格式或将XML格式转换为Java对象。
package com.example.demo;
import org.springframework.oxm.jaxb.Jaxb2Marshaller;
public class XmlConverter {
private Jaxb2Marshaller marshaller;
public void setMarshaller(Jaxb2Marshaller marshaller) {
this.marshaller = marshaller;
}
public String toXml(Object object) {
StringWriter writer = new StringWriter();
marshaller.marshal(object, new StreamResult(writer));
return writer.toString();
}
public Object fromXml(String xml) {
StringReader reader = new StringReader(xml);
return marshaller.unmarshal(new StreamSource(reader));
}
}
最后,我们需要定义Spring配置文件,用于配置XML转换器和Java对象。
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:oxm="http://www.springframework.org/schema/oxm"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/oxm
http://www.springframework.org/schema/oxm/spring-oxm.xsd">
<oxm:jaxb2-marshaller id="marshaller">
<oxm:class-to-be-bound name="com.example.demo.Person"/>
</oxm:jaxb2-marshaller>
<bean id="xmlConverter" class="com.example.demo.XmlConverter">
<property name="marshaller" ref="marshaller"/>
</bean>
<bean id="person" class="com.example.demo.Person">
<property name="name" value="Tom"/>
<property name="age" value="30"/>
</bean>
</beans>
通过本教程,你已经了解了如何在Spring框架中使用JAXB将Java对象转换为XML格式或将XML格式转换为Java对象。此外,你还学会了如何在Spring配置文件中定义XML转换器以及Java对象。