JAXB实现对象与xml互转

import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.StringReader;
import java.nio.charset.StandardCharsets;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;

public class XmlUtil {
    /**
     * JAVA对象转xml
     * @param object java对象
     * @param <T>
     * @return xml字符串
     * @throws JAXBException
     */
    public static <T> String convertXml(T object) throws JAXBException {
        JAXBContext context = JAXBContext.newInstance(object.getClass());
        // 创建 Marshaller装配器实例
        Marshaller marshaller = context.createMarshaller();
        // 可以设置的属性参见方法：com.sun.xml.internal.bind.v2.runtime.MarshallerImpl.setProperty()
        marshaller.setProperty(Marshaller.JAXB_ENCODING, StandardCharsets.UTF_8.name());
        marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
        marshaller.setProperty(Marshaller.JAXB_FRAGMENT, Boolean.TRUE);
        // 指定xml文件头
        marshaller.setProperty("com.sun.xml.internal.bind.xmlHeaders", "<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        // 将xml写入流中
        marshaller.marshal(object, outputStream);
        // 将流转换成字符串
        return new String(outputStream.toByteArray(), StandardCharsets.UTF_8);
    }

    /**
     * xml报文转java对象
     * @param xml xml报文
     * @param clazz java对象类
     * @param <E>
     * @return java对象
     * @throws JAXBException
     */
    public static <E> E convertObject(String xml, Class<E> clazz) throws JAXBException {
        JAXBContext context = JAXBContext.newInstance(clazz);
        // 创建unmarshaller解组器实例
        Unmarshaller unmarshaller = context.createUnmarshaller();
        StringReader stringReader = new StringReader(xml);
        return (E) unmarshaller.unmarshal(stringReader);
    }

    /**
     * xml文件流转java对象
     * @param inputStream xml文件流
     * @param clazz java对象类型
     * @param <E>
     * @return java对象
     * @throws JAXBException
     */
    public static <E> E convertObject(InputStream inputStream, Class<E> clazz) throws JAXBException {
        JAXBContext context = JAXBContext.newInstance(clazz);
        // 创建unmarshaller解组器实例
        Unmarshaller unmarshaller = context.createUnmarshaller();
        return (E) unmarshaller.unmarshal(inputStream);
    }
}